198 lines
5.2 KiB
C
198 lines
5.2 KiB
C
/*
|
||
* Copyright (c) 2006-2022, RT-Thread Development Team
|
||
*
|
||
* SPDX-License-Identifier: Apache-2.0
|
||
*
|
||
* Change Logs:
|
||
* Date Author Notes
|
||
* 2019-04-16 misonyo first implementation.
|
||
*/
|
||
/*
|
||
* 程序清单：这是一个串口设备 DMA 接收使用例程
|
||
* 例程导出了 uart_dma_sample 命令到控制终端
|
||
* 命令调用格式：uart_dma_sample uart3
|
||
* 命令解释：命令第二个参数是要使用的串口设备名称，为空则使用默认的串口设备
|
||
* 程序功能：通过串口输出字符串"hello RT-Thread!"，并通过串口输出接收到的数据，然后打印接收到的数据。
|
||
*/
|
||
|
||
#include <rtthread.h>
|
||
#include <dfs_file.h>
|
||
#include <usrcfg.h>
|
||
|
||
#define LOG_TAG "uart"
|
||
#define LOG_LVL LOG_LVL_DBG
|
||
#include <ulog.h>
|
||
|
||
#ifdef WORK_BOARD
|
||
#define SAMPLE_UART_NAME "uart1" /* 串口设备名称 */
|
||
#else
|
||
#define SAMPLE_UART_NAME "uart3" /* 串口设备名称 */
|
||
#endif
|
||
#define MAX_SIZE_TO_SAVE 1024*2
|
||
/* 串口接收消息结构*/
|
||
struct rx_msg
|
||
{
|
||
rt_device_t dev;
|
||
rt_size_t size;
|
||
};
|
||
/* 串口设备句柄 */
|
||
static rt_device_t serial;
|
||
/* 消息队列控制块 */
|
||
static struct rt_messagequeue rx_mq;
|
||
|
||
/* 定时器的控制块 */
|
||
static rt_timer_t timer1;
|
||
|
||
/* 定时器1超时函数 */
|
||
static void timeout1(void *parameter)
|
||
{
|
||
// rt_kprintf("periodic timer is timeout %d\n", cnt);
|
||
|
||
|
||
// rt_timer_stop(timer1);
|
||
LOG_W("超时未收到新数据。");
|
||
|
||
}
|
||
|
||
|
||
/* 接收数据回调函数 */
|
||
static rt_err_t uart_input(rt_device_t dev, rt_size_t size)
|
||
{
|
||
struct rx_msg msg;
|
||
rt_err_t result;
|
||
msg.dev = dev;
|
||
msg.size = size;
|
||
|
||
result = rt_mq_send(&rx_mq, &msg, sizeof(msg));
|
||
if ( result == -RT_EFULL)
|
||
{
|
||
/* 消息队列满 */
|
||
rt_kprintf("message queue full！\n");
|
||
}
|
||
return result;
|
||
}
|
||
struct rx_msg msg;
|
||
extern struct rt_event update_cfg;
|
||
extern int time2Str(char *str);
|
||
|
||
static void serial_thread_entry(void *parameter)
|
||
{
|
||
// struct rx_msg msg;
|
||
rt_err_t result;
|
||
rt_uint32_t rx_length=0;//单次收到的数据长度
|
||
static char rx_buffer[RT_SERIAL_RB_BUFSZ + 1];
|
||
static currLen=0;//已收数据长度
|
||
static char f[30];
|
||
time2Str(f);
|
||
while (1)
|
||
{
|
||
//暂定逻辑
|
||
//先创建文件
|
||
//接收数据并存盘
|
||
//
|
||
rt_memset(&msg, 0, sizeof(msg));
|
||
/* 从消息队列中读取消息*/
|
||
|
||
result = rt_mq_recv(&rx_mq, &msg, sizeof(msg), RT_WAITING_FOREVER);
|
||
|
||
|
||
|
||
if (result == RT_EOK)
|
||
{
|
||
|
||
/* 从串口读取数据*/
|
||
rx_length = rt_device_read(msg.dev, 0, rx_buffer+rx_length, msg.size);
|
||
currLen += rx_length;
|
||
/* 启动定时器1 */
|
||
if (timer1 != RT_NULL)
|
||
rt_timer_start(timer1);
|
||
|
||
LOG_HEX("rx:",16,rx_buffer,rx_length);//print what received.
|
||
|
||
#ifdef TR_ACK
|
||
/* 回传收到的消息 */
|
||
rt_device_write(serial, 0, rx_buffer+rx_length, rx_length);
|
||
#endif
|
||
if (currLen > 1024) //大于1k则存盘
|
||
{
|
||
|
||
int fd =open(f,O_WRONLY | O_CREAT|O_APPEND);
|
||
if(fd <0)
|
||
{
|
||
LOG_E("open file %s failed!", f);
|
||
}
|
||
else
|
||
{
|
||
write(fd,rx_buffer,rx_length);
|
||
close(fd);
|
||
currLen = 0;
|
||
rx_length=0;
|
||
}
|
||
}
|
||
}
|
||
|
||
}
|
||
}
|
||
|
||
static int uart_dma_sample(int argc, char *argv[])
|
||
{
|
||
rt_err_t ret = RT_EOK;
|
||
char uart_name[RT_NAME_MAX];
|
||
static char msg_pool[256];
|
||
// char str[] = "hello RT-Thread!\r\n";
|
||
|
||
if (argc == 2)
|
||
{
|
||
rt_strncpy(uart_name, argv[1], RT_NAME_MAX);
|
||
}
|
||
else
|
||
{
|
||
rt_strncpy(uart_name, SAMPLE_UART_NAME, RT_NAME_MAX);
|
||
}
|
||
|
||
/* 查找串口设备 */
|
||
serial = rt_device_find(uart_name);
|
||
if (!serial)
|
||
{
|
||
rt_kprintf("find %s failed!\n", uart_name);
|
||
return RT_ERROR;
|
||
}
|
||
|
||
/* 初始化消息队列 */
|
||
rt_mq_init(&rx_mq, "rx_mq",
|
||
msg_pool, /* 存放消息的缓冲区 */
|
||
sizeof(struct rx_msg), /* 一条消息的最大长度 */
|
||
sizeof(msg_pool), /* 存放消息的缓冲区大小 */
|
||
RT_IPC_FLAG_FIFO); /* 如果有多个线程等待，按照先来先得到的方法分配消息 */
|
||
|
||
/* 以 DMA 接收及轮询发送方式打开串口设备 */
|
||
rt_device_open(serial, RT_DEVICE_FLAG_DMA_RX);
|
||
/* 设置接收回调函数 */
|
||
rt_device_set_rx_indicate(serial, uart_input);
|
||
/* 发送字符串 */
|
||
// rt_device_write(serial, 0, str, (sizeof(str) - 1));
|
||
|
||
/* 创建定时器1 周期定时器 */
|
||
timer1 = rt_timer_create("rxtimer", timeout1,
|
||
RT_NULL, rt_tick_from_millisecond(40*1000),
|
||
RT_TIMER_FLAG_PERIODIC);
|
||
|
||
|
||
/* 创建 serial 线程 */
|
||
rt_thread_t thread = rt_thread_create("serial", serial_thread_entry, RT_NULL, 1024*1, 25+1, 10);
|
||
/* 创建成功则启动线程 */
|
||
if (thread != RT_NULL)
|
||
{
|
||
rt_thread_startup(thread);
|
||
}
|
||
else
|
||
{
|
||
ret = RT_ERROR;
|
||
}
|
||
|
||
return ret;
|
||
}
|
||
/* 导出到 msh 命令列表中 */
|
||
MSH_CMD_EXPORT(uart_dma_sample, uart device dma sample);
|
||
INIT_COMPONENT_EXPORT(uart_dma_sample);
|