TT12-MCU/applications/uart_dma_sample.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);