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/*
* File : serial.h
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2009 - 2010, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2009-01-05 Bernard first version
* 2010-03-29 Bernard remove interrupt tx and DMA rx mode.
*/
#ifndef __RT_HW_SERIAL_H__
#define __RT_HW_SERIAL_H__
#include <rthw.h>
#include <rtthread.h>
/* STM32F10x library definitions */
#include <stm32f2xx.h>
#define UART_RX_BUFFER_SIZE 64
#define UART_TX_DMA_NODE_SIZE 4
/* data node for Tx Mode */
struct stm32_serial_data_node
{
rt_uint8_t *data_ptr;
rt_size_t data_size;
struct stm32_serial_data_node *next, *prev;
};
struct stm32_serial_dma_tx
{
/* DMA Channel */
DMA_Stream_TypeDef* dma_channel;
/* data list head and tail */
struct stm32_serial_data_node *list_head, *list_tail;
/* data node memory pool */
struct rt_mempool data_node_mp;
rt_uint8_t data_node_mem_pool[UART_TX_DMA_NODE_SIZE *
(sizeof(struct stm32_serial_data_node) + sizeof(void*))];
};
struct stm32_serial_int_rx
{
rt_uint8_t rx_buffer[UART_RX_BUFFER_SIZE];
rt_uint32_t read_index, save_index;
};
struct stm32_serial_device
{
USART_TypeDef* uart_device;
/* rx structure */
struct stm32_serial_int_rx* int_rx;
/* tx structure */
struct stm32_serial_dma_tx* dma_tx;
};
rt_err_t rt_hw_serial_register(rt_device_t device, const char* name, rt_uint32_t flag, struct stm32_serial_device *serial);
void rt_hw_serial_isr(rt_device_t device);
void rt_hw_serial_dma_tx_isr(rt_device_t device);
#endif
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