238 lines
6.7 KiB
C
238 lines
6.7 KiB
C
/*
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* Copyright (c) 2006-2022, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2019-04-16 misonyo first implementation.
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*/
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/*
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* 程序清单：这是一个串口设备 DMA 接收使用例程
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* 例程导出了 uart_dma_sample 命令到控制终端
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* 命令调用格式：uart_dma_sample uart3
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* 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
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* 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。
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*/
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#include <rtthread.h>
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#include <dfs_file.h>
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#include <usrcfg.h>
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#include <board.h>
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#define LOG_TAG "RS232"
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#define LOG_LVL LOG_LVL_DBG
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#include <ulog.h>
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#ifdef WORK_BOARD
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#define SAMPLE_UART_NAME "uart1" /* 串口设备名称 */
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#else
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#define SAMPLE_UART_NAME "uart3" /* 串口设备名称 */
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#endif
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#ifndef MIN_FRAME_LEN
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#define MIN_FRAME_LEN 10
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#endif
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/* 串口接收消息结构*/
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struct rx_msg
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{
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rt_device_t dev;
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rt_size_t size;
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};
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/* 串口设备句柄 */
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static rt_device_t serial;
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/* 消息队列控制块 */
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static struct rt_messagequeue rx_mq;
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/* 接收数据回调函数 */
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static rt_err_t uart_input(rt_device_t dev, rt_size_t size)
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{
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struct rx_msg msg;
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rt_err_t result;
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static rt_size_t cachecnt=0;
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#ifdef CHECK_LEN
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cachecnt += size;
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if (cachecnt < MIN_FRAME_LEN) {
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LOG_W("not enough data, cached and waiting...");//处理半包
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return;
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}
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msg.dev = dev;
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msg.size = cachecnt;
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#else
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msg.dev = dev;
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msg.size = size;
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#endif
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result = rt_mq_send(&rx_mq, &msg, sizeof(msg));
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if ( result == -RT_EFULL)
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{
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/* 消息队列满 */
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LOG_W("message queue full！");
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}
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cachecnt = 0;
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return result;
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}
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struct rx_msg msg;
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//extern struct rt_event update_cfg;
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//extern int time2Str(char *str);
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static uint8_t is232parsing=0;
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uint8_t is232Busy(void)
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{
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return rx_mq.entry | is232parsing;
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}
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static void serial_thread_entry(void *parameter)
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{
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// struct rx_msg msg;
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rt_err_t result;
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size_t rx_length=0;//单次收到的数据长度
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static char rx_buffer[RT_SERIAL_RB_BUFSZ + 1];
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memset(rx_buffer,0,RT_SERIAL_RB_BUFSZ + 1);//清空rx_buffer
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static uint8_t p=0;
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while (1)
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{
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rt_memset(&msg, 0, sizeof(msg));
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/* 从消息队列中读取消息*/
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is232parsing=0;
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result = rt_mq_recv(&rx_mq, &msg, sizeof(msg), RT_WAITING_FOREVER);
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is232parsing=1;
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if (result == RT_EOK)
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{
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/* 从串口读取数据*/
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rx_length = rt_device_read(msg.dev, 0, rx_buffer+p, msg.size);
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if (!rx_length) {
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// LOG_W("read from RS232 error,should be %d Bytes",msg.size);
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continue;
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}
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LOG_I("%d Bytes received from RS232",rx_length);
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//对于断帧数据的处理
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if (rx_buffer[p+rx_length-1] != 0xed) {
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p=p+rx_length;
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if (p > 120*5) {//不死等
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rx_length = p + rx_length;
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p=0;
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parseRS232(rx_buffer, rx_length);
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}
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continue;
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}
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else {
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rx_length = p + rx_length;
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p=0;
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}
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// LOG_HEX("232rx:",16,rx_buffer,rx_length);//print what received.
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parseRS232(rx_buffer, rx_length);
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}
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}
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}
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static int uart_dma_sample(int argc, char *argv[])
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{
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rt_err_t ret = RT_EOK;
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char uart_name[RT_NAME_MAX];
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static char msg_pool[256*4*2];
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char str[] = {0x01,0x03,0x00,0x00,0x00,0x1d,0x85,0xc3};
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if (argc == 2)
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{
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rt_strncpy(uart_name, argv[1], RT_NAME_MAX);
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}
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else
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{
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rt_strncpy(uart_name, SAMPLE_UART_NAME, RT_NAME_MAX);
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}
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/* 查找串口设备 */
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serial = rt_device_find(uart_name);
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if (!serial)
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{
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rt_kprintf("find %s failed!\n", uart_name);
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return RT_ERROR;
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}
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/* 初始化消息队列 */
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rt_mq_init(&rx_mq, "rx_mq",
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msg_pool, /* 存放消息的缓冲区 */
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sizeof(struct rx_msg), /* 一条消息的最大长度 */
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sizeof(msg_pool), /* 存放消息的缓冲区大小 */
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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 */
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#ifdef TR485
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struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT; /* 初 始 化 配 置 参 数 */
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/* step2： 修 改 串 口 配 置 参 数 */
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config.baud_rate = BAUD_RATE_9600; //修 改 波 特 率 为 9600
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config.data_bits = DATA_BITS_8; //数 据 位 8
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config.stop_bits = STOP_BITS_1; //停 止 位 1
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config.bufsz = 128; //修 改 缓 冲 区 buff size 为 128
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config.parity = PARITY_NONE; //无 奇 偶 校 验 位
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/* step3： 控 制 串 口 设 备。 通 过 控 制 接 口 传 入 命 令 控 制 字， 与 控 制 参 数 */
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rt_device_control(serial, RT_DEVICE_CTRL_CONFIG, &config);
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#endif
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/* 以 DMA 接收及轮询发送方式打开串口设备 */
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rt_device_open(serial, RT_DEVICE_FLAG_DMA_RX);
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/* 设置接收回调函数 */
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rt_device_set_rx_indicate(serial, uart_input);
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/* 发送字符串 */
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#ifdef TR485
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rt_pin_write(TR485_RE, PIN_HIGH);
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rt_device_write(serial, 0, str, sizeof(str));
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rt_pin_write(TR485_RE, PIN_LOW);
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#endif
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/* 创建 serial 线程 */
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rt_thread_t thread = rt_thread_create("RS232", serial_thread_entry, RT_NULL, 1024*10, 25-1, 10);
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/* 创建成功则启动线程 */
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if (thread != RT_NULL)
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{
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rt_thread_startup(thread);
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}
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else
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{
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ret = RT_ERROR;
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}
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return ret;
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}
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/* 导出到 msh 命令列表中 */
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//MSH_CMD_EXPORT(uart_dma_sample, uart device dma sample);
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//INIT_COMPONENT_EXPORT(uart_dma_sample);
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INIT_APP_EXPORT(uart_dma_sample);
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/**
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* 发送数据到3S
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* @param din
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* @param len
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*/
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void sendTo3S(uint8_t *din, size_t len)
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{
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size_t rst = rt_device_write(serial, 0, din, len);
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LOG_D("send %d Bytes done.",rst);
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}
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#ifdef DEMO
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void sendData(int argc, char *argv[])
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{
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//待发数据
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char str[][50] =
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{
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{0x01,0x03,0x00,0x00,0x00,0x1d,0x85,0xc3},
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"hello\r\n",
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{0x5A,0xA5, 0x31, 0x32, 0x19, 0x06, 0x00, 0x01, 0x01, 0x1C, 0xED }
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};
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size_t size[]={8,strlen(str[1]),11};//对应每一维数据长度
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size_t index = 0;
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if (argc == 2) {
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index = atoi(argv[1]);
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}
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size_t rst = rt_device_write(serial, 0, str[index], size[index]);
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LOG_D("send %d Bytes ok.",rst);
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}
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MSH_CMD_EXPORT(sendData,3所串口发送数据，参数为第几组数据)
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#endif
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