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/*
* Copyright (c) 2006-2022, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2010-12-22 onelife Initial creation for EFM32
* 2011-06-27 onelife Fix a bug when using compiler optimization
* 2011-07-26 onelife Add lock (semaphore) to prevent simultaneously
* access
* 2011-12-09 onelife Add giant gecko support
* 2011-12-09 onelife Add UART module support
* 2011-12-20 onelife Change USART status format
*/
#ifndef __DRV_USART_H__
#define __DRV_USART_H__
/* Includes ------------------------------------------------------------------*/
/* Exported types ------------------------------------------------------------*/
struct efm32_usart_int_mode_t
{
rt_uint8_t *data_ptr;
rt_uint8_t data_size;
rt_uint32_t read_index, save_index;
};
struct efm32_usart_dma_mode_t
{
/* DMA Channel */
rt_uint32_t dma_channel;
/* buffer info */
rt_uint32_t *data_ptr;
rt_uint8_t data_size;
};
struct efm32_usart_device_t
{
/* Counter */
rt_uint32_t counter;
/* Lock */
struct rt_semaphore *lock;
/* Unit number */
rt_uint8_t unit;
/* State */
volatile rt_uint8_t state;
/* Pointer to USART device structure */
USART_TypeDef *usart_device;
/* Pointer to RX structure */
void *rx_mode;
/* Pointer to TX structure */
void *tx_mode;
};
/* Exported constants --------------------------------------------------------*/
/* Exported macro ------------------------------------------------------------*/
#define USART_WAIT_TIME_TX (RT_TICK_PER_SECOND / 100 * 3)
#define USART_STATE_CONSOLE (1 << 0)
#define USART_STATE_TX_BUSY (1 << 1)
#define USART_STATE_RX_BUSY (1 << 2)
#if defined(UART_PRESENT)
#define USART_STATE_ASYNC_ONLY (1 << 3)
#endif
#define USART_STATE_SYNC (1 << 4)
#define USART_STATE_MASTER (1 << 5)
#define USART_STATE_AUTOCS (1 << 6)
#define USART_STATE_9BIT (1 << 7)
#define USART_CLK_MODE_GET(state) ((state >> 8) & 0x03)
#define SYNC_SETTING_MASK (0x1F)
#define SYNC_SETTING_SHIFT (5)
/* Exported functions ------------------------------------------------------- */
void rt_hw_usart_init(void);
#endif /* __DRV_USART_H__ */
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