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1080 lines
29 KiB
1080 lines
29 KiB
/*
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* Copyright (c) 2006-2022, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2011-12-09 onelife Initial creation for EFM32
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* 2011-12-27 onelife Utilize "LEUART_PRESENT" and "LEUART_COUNT"
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*/
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/***************************************************************************//**
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* @addtogroup efm32
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* @{
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******************************************************************************/
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/* Includes ------------------------------------------------------------------*/
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#include "board.h"
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#include "hdl_interrupt.h"
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#include "drv_leuart.h"
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#if (defined(RT_USING_LEUART0) || defined(RT_USING_LEUART1))
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#if !defined(LEUART_PRESENT)
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#error "LEUART module is not available"
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#endif
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* Private macro -------------------------------------------------------------*/
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#ifdef RT_LEUART_DEBUG
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#define leuart_debug(format,args...) rt_kprintf(format, ##args)
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#else
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#define leuart_debug(format,args...)
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#endif
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/* Private variables ---------------------------------------------------------*/
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#if defined(RT_USING_LEUART0)
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#if (RT_USING_LEUART0 >= EFM32_LEUART_LOCATION_COUNT)
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#error "Wrong location number"
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#endif
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struct rt_device leuart0_device;
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static struct rt_semaphore leuart0_lock;
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#endif
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#if defined(RT_USING_LEUART1)
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#if (LEUART_COUNT <= 1)
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#error "Wrong unit number"
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#endif
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#if (RT_USING_LEUART1 >= EFM32_LEUART_LOCATION_COUNT)
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#error "Wrong location number"
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#endif
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struct rt_device leuart1_device;
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static struct rt_semaphore leuart1_lock;
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#endif
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/* Private function prototypes -----------------------------------------------*/
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/* Private functions ---------------------------------------------------------*/
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/***************************************************************************//**
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* @brief
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* Initialize LEUART device
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*
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* @details
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*
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* @note
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*
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* @param[in] dev
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* Pointer to device descriptor
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*
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* @return
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* Error code
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******************************************************************************/
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static rt_err_t rt_leuart_init (rt_device_t dev)
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{
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struct efm32_leuart_device_t *leuart;
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leuart = (struct efm32_leuart_device_t *)(dev->user_data);
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if (!(dev->flag & RT_DEVICE_FLAG_ACTIVATED))
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{
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if (dev->flag & RT_DEVICE_FLAG_DMA_TX)
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{
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struct efm32_leuart_dma_mode_t *dma_tx;
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dma_tx = (struct efm32_leuart_dma_mode_t *)(leuart->tx_mode);
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leuart->state |= LEUART_STATE_RX_BUSY;
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}
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if (dev->flag & RT_DEVICE_FLAG_INT_RX)
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{
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struct efm32_leuart_int_mode_t *int_rx;
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int_rx = (struct efm32_leuart_int_mode_t *)(leuart->rx_mode);
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int_rx->data_ptr = RT_NULL;
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}
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/* Enable LEUART */
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LEUART_Enable(leuart->leuart_device, leuartEnable);
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dev->flag |= RT_DEVICE_FLAG_ACTIVATED;
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}
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return RT_EOK;
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}
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/***************************************************************************//**
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* @brief
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* Open LEUART device
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*
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* @details
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*
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* @note
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*
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* @param[in] dev
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* Pointer to device descriptor
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*
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* @param[in] oflag
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* Device open flag
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*
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* @return
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* Error code
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******************************************************************************/
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static rt_err_t rt_leuart_open(rt_device_t dev, rt_uint16_t oflag)
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{
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RT_ASSERT(dev != RT_NULL);
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struct efm32_leuart_device_t *leuart;
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leuart = (struct efm32_leuart_device_t *)(dev->user_data);
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if (dev->flag & RT_DEVICE_FLAG_INT_RX)
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{
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IRQn_Type rxIrq;
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//if (leuart->state & LEUART_STATE_CONSOLE)
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{ /* Allocate new RX buffer */
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struct efm32_leuart_int_mode_t *int_mode;
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int_mode = (struct efm32_leuart_int_mode_t *)(leuart->rx_mode);
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if ((int_mode->data_ptr = rt_malloc(LEUART_RX_BUFFER_SIZE)) == RT_NULL)
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{
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leuart_debug("LEUART%d err: no mem for RX BUF\n", leuart->unit);
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return -RT_ENOMEM;
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}
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rt_memset(int_mode->data_ptr, 0, LEUART_RX_BUFFER_SIZE);
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int_mode->data_size = LEUART_RX_BUFFER_SIZE;
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int_mode->read_index = 0;
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int_mode->save_index = 0;
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}
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/* Enable RX interrupt */
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leuart->leuart_device->IEN = LEUART_IEN_RXDATAV;
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/* Enable IRQ */
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switch (leuart->unit)
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{
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case 0:
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rxIrq = LEUART0_IRQn;
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break;
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#if (LEUART_COUNT > 1)
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case 1:
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rxIrq = LEUART1_IRQn;
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break;
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#endif
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}
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if (oflag != RT_DEVICE_OFLAG_WRONLY)
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{
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NVIC_ClearPendingIRQ(rxIrq);
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NVIC_SetPriority(rxIrq, EFM32_IRQ_PRI_DEFAULT);
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NVIC_EnableIRQ(rxIrq);
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}
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}
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/* Clear Flag */
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leuart->leuart_device->IFC = _LEUART_IFC_MASK;
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if ((dev->flag & RT_DEVICE_FLAG_DMA_TX) && (oflag != RT_DEVICE_OFLAG_RDONLY))
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{
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/* DMA IRQ is enabled by DMA_Init() */
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NVIC_SetPriority(DMA_IRQn, EFM32_IRQ_PRI_DEFAULT);
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}
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leuart->counter++;
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leuart_debug("LEUART%d: Open with flag %x\n", leuart->unit, oflag);
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return RT_EOK;
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}
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/***************************************************************************//**
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* @brief
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* Close LEUART device
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*
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* @details
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*
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* @note
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*
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* @param[in] dev
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* Pointer to device descriptor
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*
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* @return
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* Error code
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******************************************************************************/
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static rt_err_t rt_leuart_close(rt_device_t dev)
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{
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RT_ASSERT(dev != RT_NULL);
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struct efm32_leuart_device_t *leuart;
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leuart = (struct efm32_leuart_device_t *)(dev->user_data);
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if (--leuart->counter == 0)
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{
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if (dev->flag & RT_DEVICE_FLAG_INT_RX)
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{
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struct efm32_leuart_int_mode_t *int_rx;
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int_rx = (struct efm32_leuart_int_mode_t *)leuart->rx_mode;
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rt_free(int_rx->data_ptr);
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int_rx->data_ptr = RT_NULL;
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}
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}
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return RT_EOK;
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}
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/***************************************************************************//**
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* @brief
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* Read from LEUART device
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*
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* @details
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*
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* @note
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*
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* @param[in] dev
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* Pointer to device descriptor
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*
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* @param[in] pos
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* Offset
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*
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* @param[in] buffer
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* Poniter to the buffer
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*
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* @param[in] size
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* Buffer size in byte
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*
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* @return
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* Number of read bytes
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******************************************************************************/
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static rt_ssize_t rt_leuart_read (
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rt_device_t dev,
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rt_off_t pos,
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void *buffer,
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rt_size_t size)
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{
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struct efm32_leuart_device_t *leuart;
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rt_uint8_t *ptr;
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rt_err_t err_code;
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rt_size_t read_len;
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leuart = (struct efm32_leuart_device_t *)(dev->user_data);
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/* Lock device */
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if (rt_hw_interrupt_check())
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{
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err_code = rt_sem_take(leuart->lock, RT_WAITING_NO);
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}
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else
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{
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err_code = rt_sem_take(leuart->lock, RT_WAITING_FOREVER);
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}
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if (err_code != RT_EOK)
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{
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rt_set_errno(err_code);
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return 0;
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}
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if (dev->flag & RT_DEVICE_FLAG_INT_RX)
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{
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ptr = buffer;
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/* interrupt mode Rx */
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while (size)
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{
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rt_base_t level;
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struct efm32_leuart_int_mode_t *int_rx;
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int_rx = (struct efm32_leuart_int_mode_t *)\
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(((struct efm32_leuart_device_t *)(dev->user_data))->rx_mode);
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/* disable interrupt */
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level = rt_hw_interrupt_disable();
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if (int_rx->read_index != int_rx->save_index)
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{
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/* read a character */
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*ptr++ = int_rx->data_ptr[int_rx->read_index];
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size--;
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/* move to next position */
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int_rx->read_index ++;
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if (int_rx->read_index >= LEUART_RX_BUFFER_SIZE)
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{
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int_rx->read_index = 0;
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}
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}
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else
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{
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/* set error code */
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err_code = -RT_EEMPTY;
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/* enable interrupt */
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rt_hw_interrupt_enable(level);
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break;
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}
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/* enable interrupt */
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rt_hw_interrupt_enable(level);
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}
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read_len = (rt_uint32_t)ptr - (rt_uint32_t)buffer;
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}
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else
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{
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LEUART_TypeDef *leuart_device;
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leuart = (struct efm32_leuart_device_t *)(dev->user_data);
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leuart_device = ((struct efm32_leuart_device_t *)(dev->user_data))->leuart_device;
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ptr = buffer;
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/* polling mode */
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while ((rt_uint32_t)ptr - (rt_uint32_t)buffer < size)
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{
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while (leuart_device->STATUS & LEUART_STATUS_RXDATAV)
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{
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*ptr = leuart_device->RXDATA & 0xff;
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ptr ++;
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}
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}
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read_len = size;
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}
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/* Unlock device */
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rt_sem_release(leuart->lock);
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/* set error code */
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rt_set_errno(err_code);
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return read_len;
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}
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/***************************************************************************//**
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* @brief
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* Write to LEUART device
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*
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* @details
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*
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* @note
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*
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* @param[in] dev
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* Pointer to device descriptor
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*
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* @param[in] pos
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* Offset
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*
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* @param[in] buffer
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* Poniter to the buffer
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*
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* @param[in] size
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* Buffer size in byte
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*
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* @return
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* Number of written bytes
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******************************************************************************/
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static rt_ssize_t rt_leuart_write (
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rt_device_t dev,
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rt_off_t pos,
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const void* buffer,
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rt_size_t size)
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{
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rt_err_t err_code;
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rt_size_t write_size;
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struct efm32_leuart_device_t* leuart;
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write_size = 0;
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leuart = (struct efm32_leuart_device_t*)(dev->user_data);
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/* Lock device */
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if (rt_hw_interrupt_check())
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{
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err_code = rt_sem_take(leuart->lock, RT_WAITING_NO);
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}
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else
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{
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err_code = rt_sem_take(leuart->lock, RT_WAITING_FOREVER);
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}
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if (err_code != RT_EOK)
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{
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rt_set_errno(err_code);
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return 0;
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}
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if ((dev->flag & RT_DEVICE_FLAG_DMA_TX) && (size > 2))
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{ /* DMA mode Tx */
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struct efm32_leuart_dma_mode_t *dma_tx;
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if (dev->flag & RT_DEVICE_FLAG_STREAM)
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{
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if (*((rt_uint8_t *)buffer + size - 1) == '\n')
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{
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*((rt_uint8_t *)buffer + size - 1) = '\r';
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*((rt_uint8_t *)buffer + size++) = '\n';
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*((rt_uint8_t *)buffer + size) = 0;
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}
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}
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dma_tx = (struct efm32_leuart_dma_mode_t *)(leuart->tx_mode);
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dma_tx->data_ptr = (rt_uint32_t *)buffer;
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dma_tx->data_size = size;
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leuart->state |= LEUART_STATE_TX_BUSY;
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DMA_ActivateBasic(
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dma_tx->dma_channel,
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true,
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false,
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(void *)&(leuart->leuart_device->TXDATA),
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(void *)buffer,
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(rt_uint32_t)(size - 1));
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/* Wait, otherwise the TX buffer is overwrite */
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// if (leuart->state & LEUART_STATE_CONSOLE)
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// {
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while(leuart->state & LEUART_STATE_TX_BUSY);
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// }
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// else
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// {
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// while(leuart->state & LEUART_STATE_TX_BUSY)
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// {
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// rt_thread_sleep(LEUART_WAIT_TIME_TX);
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// }
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// }
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// TODO: This function blocks the process
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write_size = size;
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}
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else
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{ /* polling mode */
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rt_uint8_t *ptr = (rt_uint8_t *)buffer;
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if (dev->flag & RT_DEVICE_FLAG_STREAM)
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{
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/* stream mode */
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while (size)
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{
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if (*ptr == '\n')
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{
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while (!(leuart->leuart_device->STATUS & LEUART_STATUS_TXBL));
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leuart->leuart_device->TXDATA = '\r';
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}
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while (!(leuart->leuart_device->STATUS & LEUART_STATUS_TXBL));
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leuart->leuart_device->TXDATA = (rt_uint32_t)*ptr;
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++ptr; --size;
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}
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}
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else
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{
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/* write data directly */
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while (size)
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{
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while (!(leuart->leuart_device->STATUS & LEUART_STATUS_TXBL));
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leuart->leuart_device->TXDATA = (rt_uint32_t)*ptr;
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++ptr; --size;
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}
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}
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write_size = (rt_size_t)ptr - (rt_size_t)buffer;
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}
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/* Unlock device */
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rt_sem_release(leuart->lock);
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/* set error code */
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rt_set_errno(err_code);
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return write_size;
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}
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/***************************************************************************//**
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* @brief
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* Configure LEUART device
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*
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* @details
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*
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* @note
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*
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* @param[in] dev
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* Pointer to device descriptor
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*
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* @param[in] cmd
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* IIC control command
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*
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* @param[in] args
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* Arguments
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*
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* @return
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* Error code
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******************************************************************************/
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static rt_err_t rt_leuart_control (
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rt_device_t dev,
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rt_uint8_t cmd,
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void *args)
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{
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RT_ASSERT(dev != RT_NULL);
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rt_err_t err_code;
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struct efm32_leuart_device_t *leuart;
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leuart = (struct efm32_leuart_device_t *)(dev->user_data);
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/* Lock device */
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if (rt_hw_interrupt_check())
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{
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err_code = rt_sem_take(leuart->lock, RT_WAITING_NO);
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}
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else
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{
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err_code = rt_sem_take(leuart->lock, RT_WAITING_FOREVER);
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}
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if (err_code != RT_EOK)
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{
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return err_code;
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}
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switch (cmd)
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{
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case RT_DEVICE_CTRL_SUSPEND:
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/* Suspend device */
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dev->flag |= RT_DEVICE_FLAG_SUSPENDED;
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LEUART_Enable(leuart->leuart_device, leuartDisable);
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break;
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case RT_DEVICE_CTRL_RESUME:
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/* Resume device */
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dev->flag &= ~RT_DEVICE_FLAG_SUSPENDED;
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LEUART_Enable(leuart->leuart_device, leuartEnable);
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break;
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case RT_DEVICE_CTRL_LEUART_RBUFFER:
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/* Set RX buffer */
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{
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struct efm32_leuart_int_mode_t *int_rx;
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rt_uint8_t size;
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int_rx = (struct efm32_leuart_int_mode_t *)(leuart->rx_mode);
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size = (rt_uint8_t)((rt_uint32_t)args & 0xFFUL);
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/* Free previous RX buffer */
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if (int_rx->data_ptr != RT_NULL)
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{
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if (size == 0)
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{ /* Free RX buffer */
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rt_free(int_rx->data_ptr);
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int_rx->data_ptr = RT_NULL;
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}
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else if (size != int_rx->data_size)
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{
|
|
/* Re-allocate RX buffer */
|
|
if ((int_rx->data_ptr = rt_realloc(int_rx->data_ptr, size)) \
|
|
== RT_NULL)
|
|
{
|
|
leuart_debug("LEUART%d err: no mem for RX BUF\n", leuart->unit);
|
|
err_code = -RT_ENOMEM;
|
|
break;
|
|
}
|
|
// TODO: Is the following line necessary?
|
|
//rt_memset(int_rx->data_ptr, 0, size);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Allocate new RX buffer */
|
|
if ((int_rx->data_ptr = rt_malloc(size)) == RT_NULL)
|
|
{
|
|
leuart_debug("LEUART%d err: no mem for RX BUF\n", leuart->unit);
|
|
err_code = -RT_ENOMEM;
|
|
break;
|
|
}
|
|
}
|
|
int_rx->data_size = size;
|
|
int_rx->read_index = 0;
|
|
int_rx->save_index = 0;
|
|
}
|
|
break;
|
|
|
|
}
|
|
|
|
/* Unlock device */
|
|
rt_sem_release(leuart->lock);
|
|
|
|
return err_code;
|
|
}
|
|
|
|
/***************************************************************************//**
|
|
* @brief
|
|
* LEUART RX data valid interrupt handler
|
|
*
|
|
* @details
|
|
*
|
|
* @note
|
|
*
|
|
* @param[in] dev
|
|
* Pointer to device descriptor
|
|
******************************************************************************/
|
|
void rt_hw_leuart_rx_isr(rt_device_t dev)
|
|
{
|
|
struct efm32_leuart_device_t *leuart;
|
|
struct efm32_leuart_int_mode_t *int_rx;
|
|
rt_uint32_t flag;
|
|
|
|
/* interrupt mode receive */
|
|
RT_ASSERT(dev->flag & RT_DEVICE_FLAG_INT_RX);
|
|
|
|
leuart = (struct efm32_leuart_device_t *)(dev->user_data);
|
|
int_rx = (struct efm32_leuart_int_mode_t *)(leuart->rx_mode);
|
|
|
|
RT_ASSERT(int_rx->data_ptr != RT_NULL);
|
|
|
|
/* Set status */
|
|
leuart->state |= LEUART_STATE_RX_BUSY;
|
|
|
|
/* save into rx buffer */
|
|
while (leuart->leuart_device->STATUS & LEUART_STATUS_RXDATAV)
|
|
{
|
|
rt_base_t level;
|
|
|
|
/* disable interrupt */
|
|
level = rt_hw_interrupt_disable();
|
|
|
|
/* save character */
|
|
int_rx->data_ptr[int_rx->save_index] = \
|
|
(rt_uint8_t)(leuart->leuart_device->RXDATA & 0xFFUL);
|
|
int_rx->save_index ++;
|
|
if (int_rx->save_index >= LEUART_RX_BUFFER_SIZE)
|
|
int_rx->save_index = 0;
|
|
|
|
/* if the next position is read index, discard this 'read char' */
|
|
if (int_rx->save_index == int_rx->read_index)
|
|
{
|
|
int_rx->read_index ++;
|
|
if (int_rx->read_index >= LEUART_RX_BUFFER_SIZE)
|
|
{
|
|
int_rx->read_index = 0;
|
|
}
|
|
}
|
|
|
|
/* enable interrupt */
|
|
rt_hw_interrupt_enable(level);
|
|
}
|
|
|
|
/* invoke callback */
|
|
if (dev->rx_indicate != RT_NULL)
|
|
{
|
|
rt_size_t rx_length;
|
|
|
|
/* get rx length */
|
|
rx_length = int_rx->read_index > int_rx->save_index ?
|
|
LEUART_RX_BUFFER_SIZE - int_rx->read_index + int_rx->save_index : \
|
|
int_rx->save_index - int_rx->read_index;
|
|
|
|
dev->rx_indicate(dev, rx_length);
|
|
}
|
|
}
|
|
|
|
/***************************************************************************//**
|
|
* @brief
|
|
* DMA for LEUART TX interrupt handler
|
|
*
|
|
* @details
|
|
*
|
|
* @note
|
|
*
|
|
* @param[in] dev
|
|
* Pointer to device descriptor
|
|
******************************************************************************/
|
|
void rt_hw_leuart_dma_tx_isr(rt_device_t dev)
|
|
{
|
|
/* DMA mode receive */
|
|
struct efm32_leuart_device_t *leuart;
|
|
struct efm32_leuart_dma_mode_t *dma_tx;
|
|
|
|
RT_ASSERT(dev->flag & RT_DEVICE_FLAG_DMA_TX);
|
|
|
|
leuart = (struct efm32_leuart_device_t *)(dev->user_data);
|
|
dma_tx = (struct efm32_leuart_dma_mode_t *)(leuart->tx_mode);
|
|
|
|
/* invoke call to notify tx complete */
|
|
if (dev->tx_complete != RT_NULL)
|
|
{
|
|
dev->tx_complete(dev, dma_tx->data_ptr);
|
|
}
|
|
|
|
/* Set status */
|
|
leuart->state &= ~(rt_uint32_t)LEUART_STATE_TX_BUSY;
|
|
}
|
|
|
|
/***************************************************************************//**
|
|
* @brief
|
|
* Register LEUART device
|
|
*
|
|
* @details
|
|
*
|
|
* @note
|
|
*
|
|
* @param[in] device
|
|
* Pointer to device descriptor
|
|
*
|
|
* @param[in] name
|
|
* Device name
|
|
*
|
|
* @param[in] flag
|
|
* Configuration flags
|
|
*
|
|
* @param[in] leuart
|
|
* Pointer to LEUART device descriptor
|
|
*
|
|
* @return
|
|
* Error code
|
|
******************************************************************************/
|
|
rt_err_t rt_hw_leuart_register(
|
|
rt_device_t device,
|
|
const char *name,
|
|
rt_uint32_t flag,
|
|
struct efm32_leuart_device_t *leuart)
|
|
{
|
|
RT_ASSERT(device != RT_NULL);
|
|
|
|
if ((flag & RT_DEVICE_FLAG_DMA_RX) ||
|
|
(flag & RT_DEVICE_FLAG_INT_TX))
|
|
{
|
|
RT_ASSERT(0);
|
|
}
|
|
|
|
device->type = RT_Device_Class_Char;
|
|
device->rx_indicate = RT_NULL;
|
|
device->tx_complete = RT_NULL;
|
|
device->init = rt_leuart_init;
|
|
device->open = rt_leuart_open;
|
|
device->close = rt_leuart_close;
|
|
device->read = rt_leuart_read;
|
|
device->write = rt_leuart_write;
|
|
device->control = rt_leuart_control;
|
|
device->user_data = leuart;
|
|
|
|
/* register a character device */
|
|
return rt_device_register(device, name, RT_DEVICE_FLAG_RDWR | flag);
|
|
}
|
|
|
|
/***************************************************************************//**
|
|
* @brief
|
|
* Initialize the specified LEUART unit
|
|
*
|
|
* @details
|
|
*
|
|
* @note
|
|
*
|
|
* @param[in] device
|
|
* Pointer to device descriptor
|
|
*
|
|
* @param[in] unitNumber
|
|
* Unit number
|
|
*
|
|
* @param[in] location
|
|
* Pin location number
|
|
*
|
|
* @param[in] flag
|
|
* Configuration flag
|
|
*
|
|
* @param[in] dmaChannel
|
|
* DMA channel number for TX
|
|
*
|
|
* @param[in] console
|
|
* Indicate if using as console
|
|
*
|
|
* @return
|
|
* Pointer to LEUART device
|
|
******************************************************************************/
|
|
static struct efm32_leuart_device_t *rt_hw_leuart_unit_init(
|
|
rt_device_t device,
|
|
rt_uint8_t unitNumber,
|
|
rt_uint8_t location,
|
|
rt_uint32_t flag,
|
|
rt_uint32_t dmaChannel,
|
|
rt_uint8_t config)
|
|
{
|
|
struct efm32_leuart_device_t *leuart;
|
|
struct efm32_leuart_dma_mode_t *dma_mode;
|
|
DMA_CB_TypeDef *callback;
|
|
CMU_Clock_TypeDef leuartClock;
|
|
rt_uint32_t txDmaSelect;
|
|
GPIO_Port_TypeDef port_tx, port_rx, port_clk, port_cs;
|
|
rt_uint32_t pin_tx, pin_rx, pin_clk, pin_cs;
|
|
LEUART_Init_TypeDef init = LEUART_INIT_DEFAULT;
|
|
efm32_irq_hook_init_t hook;
|
|
|
|
do
|
|
{
|
|
/* Allocate device */
|
|
leuart = rt_malloc(sizeof(struct efm32_leuart_device_t));
|
|
if (leuart == RT_NULL)
|
|
{
|
|
leuart_debug("LEUART%d err: no mem\n", unitNumber);
|
|
break;
|
|
}
|
|
leuart->counter = 0;
|
|
leuart->unit = unitNumber;
|
|
leuart->state = config;
|
|
leuart->tx_mode = RT_NULL;
|
|
leuart->rx_mode = RT_NULL;
|
|
|
|
/* Allocate TX */
|
|
dma_mode = RT_NULL;
|
|
if (flag & RT_DEVICE_FLAG_DMA_TX)
|
|
{
|
|
leuart->tx_mode = dma_mode = rt_malloc(sizeof(struct efm32_leuart_dma_mode_t));
|
|
if (dma_mode == RT_NULL)
|
|
{
|
|
leuart_debug("LEUART%d err: no mem for DMA TX\n", unitNumber);
|
|
break;
|
|
}
|
|
dma_mode->dma_channel = dmaChannel;
|
|
}
|
|
|
|
/* Allocate RX */
|
|
if (flag & RT_DEVICE_FLAG_INT_RX)
|
|
{
|
|
leuart->rx_mode = rt_malloc(sizeof(struct efm32_leuart_int_mode_t));
|
|
if (leuart->rx_mode == RT_NULL)
|
|
{
|
|
leuart_debug("LEUART%d err: no mem for INT RX\n, unitNumber");
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Initialization */
|
|
if (unitNumber >= LEUART_COUNT)
|
|
{
|
|
break;
|
|
}
|
|
switch (unitNumber)
|
|
{
|
|
case 0:
|
|
leuart->leuart_device = LEUART0;
|
|
leuartClock = (CMU_Clock_TypeDef)cmuClock_LEUART0;
|
|
txDmaSelect = DMAREQ_LEUART0_TXBL;
|
|
port_tx = AF_LEUART0_TX_PORT(location);
|
|
pin_tx = AF_LEUART0_TX_PIN(location);
|
|
port_rx = AF_LEUART0_RX_PORT(location);
|
|
pin_rx = AF_LEUART0_RX_PIN(location);
|
|
break;
|
|
#if (LEUART_COUNT > 1)
|
|
case 1:
|
|
leuart->leuart_device = LEUART1;
|
|
leuartClock = (CMU_Clock_TypeDef)cmuClock_LEUART1;
|
|
txDmaSelect = DMAREQ_LEUART1_TXBL;
|
|
port_tx = AF_LEUART1_TX_PORT(location);
|
|
pin_tx = AF_LEUART1_TX_PIN(location);
|
|
port_rx = AF_LEUART1_RX_PORT(location);
|
|
pin_rx = AF_LEUART1_RX_PIN(location);
|
|
break;
|
|
#endif
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/* Do not prescale clock */
|
|
CMU_ClockDivSet(leuartClock, cmuClkDiv_1);
|
|
|
|
/* Enable LEUART clock */
|
|
CMU_ClockEnable(leuartClock, true);
|
|
|
|
/* Config GPIO */
|
|
GPIO_PinModeSet(
|
|
port_tx,
|
|
pin_tx,
|
|
gpioModePushPull,
|
|
0);
|
|
GPIO_PinModeSet(
|
|
port_rx,
|
|
pin_rx,
|
|
gpioModeInputPull,
|
|
1);
|
|
|
|
/* Config interrupt and NVIC */
|
|
if (flag & RT_DEVICE_FLAG_INT_RX)
|
|
{
|
|
hook.type = efm32_irq_type_leuart;
|
|
hook.unit = unitNumber;
|
|
hook.cbFunc = rt_hw_leuart_rx_isr;
|
|
hook.userPtr = device;
|
|
efm32_irq_hook_register(&hook);
|
|
}
|
|
|
|
/* Config DMA */
|
|
if (flag & RT_DEVICE_FLAG_DMA_TX)
|
|
{
|
|
DMA_CfgChannel_TypeDef chnlCfg;
|
|
DMA_CfgDescr_TypeDef descrCfg;
|
|
|
|
hook.type = efm32_irq_type_dma;
|
|
hook.unit = dmaChannel;
|
|
hook.cbFunc = rt_hw_leuart_dma_tx_isr;
|
|
hook.userPtr = device;
|
|
efm32_irq_hook_register(&hook);
|
|
|
|
callback = (DMA_CB_TypeDef *)rt_malloc(sizeof(DMA_CB_TypeDef));
|
|
if (callback == RT_NULL)
|
|
{
|
|
leuart_debug("LEUART%d err: no mem for callback\n", unitNumber);
|
|
break;
|
|
}
|
|
callback->cbFunc = DMA_IRQHandler_All;
|
|
callback->userPtr = RT_NULL;
|
|
callback->primary = 0;
|
|
|
|
/* Setting up DMA channel */
|
|
chnlCfg.highPri = false; /* Can't use with peripherals */
|
|
chnlCfg.enableInt = true; /* Interrupt for callback function */
|
|
chnlCfg.select = txDmaSelect;
|
|
chnlCfg.cb = callback;
|
|
DMA_CfgChannel(dmaChannel, &chnlCfg);
|
|
|
|
/* Setting up DMA channel descriptor */
|
|
descrCfg.dstInc = dmaDataIncNone;
|
|
descrCfg.srcInc = dmaDataInc1;
|
|
descrCfg.size = dmaDataSize1;
|
|
descrCfg.arbRate = dmaArbitrate1;
|
|
descrCfg.hprot = 0;
|
|
DMA_CfgDescr(dmaChannel, true, &descrCfg);
|
|
}
|
|
|
|
/* Init specified LEUART unit */
|
|
LEUART_Init(leuart->leuart_device, &init);
|
|
|
|
/* Enable RX and TX pins and set location */
|
|
leuart->leuart_device->ROUTE = LEUART_ROUTE_RXPEN | LEUART_ROUTE_TXPEN | \
|
|
(location << _LEUART_ROUTE_LOCATION_SHIFT);
|
|
|
|
/* Clear RX/TX buffers */
|
|
leuart->leuart_device->CMD = LEUART_CMD_CLEARRX | LEUART_CMD_CLEARTX;
|
|
|
|
return leuart;
|
|
} while(0);
|
|
|
|
if (leuart->rx_mode)
|
|
{
|
|
rt_free(leuart->rx_mode);
|
|
}
|
|
if (leuart->tx_mode)
|
|
{
|
|
rt_free(leuart->tx_mode);
|
|
}
|
|
if (leuart)
|
|
{
|
|
rt_free(leuart);
|
|
}
|
|
if (callback)
|
|
{
|
|
rt_free(leuart);
|
|
}
|
|
|
|
leuart_debug("LEUART%d err: init failed!\n", unitNumber);
|
|
return RT_NULL;
|
|
}
|
|
|
|
/***************************************************************************//**
|
|
* @brief
|
|
* Initialize all LEUART module related hardware and register LEUART device to
|
|
* kernel
|
|
*
|
|
* @details
|
|
*
|
|
* @note
|
|
******************************************************************************/
|
|
void rt_hw_leuart_init(void)
|
|
{
|
|
struct efm32_leuart_device_t *leuart;
|
|
rt_uint32_t flag;
|
|
rt_uint8_t config;
|
|
|
|
do
|
|
{
|
|
#ifdef RT_USING_LEUART0
|
|
config = 0;
|
|
flag = RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX;
|
|
|
|
#if (RT_CONSOLE_DEVICE == EFM_LEUART0)
|
|
config |= LEUART_STATE_CONSOLE;
|
|
flag |= RT_DEVICE_FLAG_STREAM;
|
|
#endif
|
|
|
|
#ifdef RT_LEUART0_USING_DMA
|
|
RT_ASSERT(RT_LEUART0_USING_DMA < DMA_CHAN_COUNT);
|
|
flag |= RT_DEVICE_FLAG_DMA_TX;
|
|
#else
|
|
#define RT_LEUART0_USING_DMA EFM32_NO_DMA
|
|
#endif
|
|
|
|
/* Initialize and Register leuart0 */
|
|
if ((leuart = rt_hw_leuart_unit_init(
|
|
&leuart0_device,
|
|
0,
|
|
RT_USING_LEUART0,
|
|
flag,
|
|
RT_LEUART0_USING_DMA,
|
|
config)) != RT_NULL)
|
|
{
|
|
rt_hw_leuart_register(&leuart0_device, RT_LEUART0_NAME, flag, leuart);
|
|
}
|
|
else
|
|
{
|
|
break;
|
|
}
|
|
/* Initialize lock for leuart0 */
|
|
leuart->lock = &leuart0_lock;
|
|
if (rt_sem_init(leuart->lock, RT_LEUART0_NAME, 1, RT_IPC_FLAG_FIFO) != RT_EOK)
|
|
{
|
|
break;
|
|
}
|
|
#endif
|
|
|
|
#if ((LEUART_COUNT > 1) && defined(RT_USING_LEUART1))
|
|
config = 0;
|
|
flag = RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX;
|
|
|
|
#if (RT_CONSOLE_DEVICE == EFM_LEUART1)
|
|
config |= LEUART_STATE_CONSOLE;
|
|
flag |= RT_DEVICE_FLAG_STREAM;
|
|
#endif
|
|
|
|
#ifdef RT_LEUART1_USING_DMA
|
|
RT_ASSERT(RT_LEUART1_USING_DMA < DMA_CHAN_COUNT);
|
|
flag |= RT_DEVICE_FLAG_DMA_TX;
|
|
#else
|
|
#define RT_LEUART1_USING_DMA EFM32_NO_DMA
|
|
#endif
|
|
|
|
/* Initialize and Register leuart1 */
|
|
if ((leuart = rt_hw_leuart_unit_init(
|
|
&leuart1_device,
|
|
1,
|
|
RT_USING_LEUART1,
|
|
flag,
|
|
RT_LEUART1_USING_DMA,
|
|
config)) != RT_NULL)
|
|
{
|
|
rt_hw_leuart_register(&leuart1_device, RT_LEUART1_NAME, flag, leuart);
|
|
}
|
|
else
|
|
{
|
|
break;
|
|
}
|
|
/* Initialize lock for leuart1 */
|
|
leuart->lock = &leuart1_lock;
|
|
if (rt_sem_init(leuart->lock, RT_LEUART1_NAME, 1, RT_IPC_FLAG_FIFO) != RT_EOK)
|
|
{
|
|
break;
|
|
}
|
|
#endif
|
|
|
|
leuart_debug("LEUART: H/W init OK!\n");
|
|
return;
|
|
} while (0);
|
|
|
|
rt_kprintf("LEUART: H/W init failed!\n");
|
|
}
|
|
|
|
#endif /* (defined(RT_USING_LEUART0) || defined(RT_USING_LEUART1)) */
|
|
/***************************************************************************//**
|
|
* @}
|
|
******************************************************************************/
|
|
|