69 lines
2.0 KiB
C
69 lines
2.0 KiB
C
/******************************************************************//**
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* @file drv_usart.h
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* @brief USART driver of RT-Thread RTOS for EFM32
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* COPYRIGHT (C) 2011, RT-Thread Development Team
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* @author onelife
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* @version 0.4 beta
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**********************************************************************
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* @section License
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* The license and distribution terms for this file may be found in the file LICENSE in this
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* distribution or at http://www.rt-thread.org/license/LICENSE
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**********************************************************************
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* @section Change Logs
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* Date Author Notes
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* 2010-12-22 onelife Initial creation for EFM32
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*********************************************************************/
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#ifndef __DRV_USART_H__
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#define __DRV_USART_H__
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/* Includes -------------------------------------------------------------------*/
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/* Exported types -------------------------------------------------------------*/
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struct efm32_usart_int_mode_t
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{
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rt_uint8_t *data_ptr;
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rt_uint8_t data_size;
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rt_uint32_t read_index, save_index;
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};
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struct efm32_usart_dma_mode_t
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{
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/* DMA Channel */
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rt_uint32_t dma_channel;
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/* buffer info */
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rt_uint32_t *data_ptr;
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rt_uint8_t data_size;
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};
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struct efm32_usart_device_t
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{
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/* Unit number */
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rt_uint8_t unit;
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/* State */
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rt_uint32_t state;
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/* Pointer to USART device structure */
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USART_TypeDef* usart_device;
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/* Pointer to RX structure */
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void *rx_mode;
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/* Pointer to TX structure */
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void *tx_mode;
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};
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/* Exported constants ---------------------------------------------------------*/
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/* Exported macro -------------------------------------------------------------*/
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#define USART_WAIT_TIME_TX (RT_TICK_PER_SECOND / 100 * 3)
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#define USART_STATE_CONSOLE (1 << 0)
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#define USART_STATE_TX_BUSY (1 << 1)
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#define USART_STATE_RX_BUSY (1 << 2)
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/* Exported functions --------------------------------------------------------- */
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void rt_hw_usart_init(void);
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#endif /* __DRV_USART_H__ */
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