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19e3ce5ee3
1. Add interrupt context check function (context_gcc.S) 2. Add lock (semaphore) for IIC, USART and Ethernet drivers to prevent simultaneously access 3. Add multiple channels support for scan mode of ADC driver 4. Modify miscellaneous drivers according to ADC driver changes 5. Add SWO output enable function (board.c) 6. Disable all interrupts in GPIO interrupt handler (hdl_interrupt.c) 7. Add two Ethernet utility functions (drv_ethernet.c) 8. Add accelerometer driver (analog output) 9. Add accelerometer demo (draft, application.c) git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1654 bbd45198-f89e-11dd-88c7-29a3b14d5316
75 lines
2.4 KiB
C
75 lines
2.4 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
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* LICENSE in this 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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* 2011-06-27 onelife Fix a bug when using compiler optimization
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* 2011-07-26 onelife Add lock (semaphore) to prevent simultaneously
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* access
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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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/* Counter */
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rt_uint32_t counter;
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/* Lock */
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struct rt_semaphore *lock;
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/* Unit number */
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rt_uint8_t unit;
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/* State */
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volatile rt_uint8_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_SYNC (1 << 1)
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#define USART_STATE_MASTER (1 << 2)
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#define USART_STATE_AUTOCS (1 << 3)
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#define USART_STATE_TX_BUSY (1 << 4)
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#define USART_STATE_RX_BUSY (1 << 5)
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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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