208 lines
5.8 KiB
C
208 lines
5.8 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>
|
||
#include <board.h>
|
||
|
||
#define LOG_TAG "RS232"
|
||
#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
|
||
|
||
#ifndef MIN_FRAME_LEN
|
||
#define MIN_FRAME_LEN 10
|
||
#endif
|
||
/* 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;
|
||
|
||
|
||
/* 接收数据回调函数 */
|
||
static rt_err_t uart_input(rt_device_t dev, rt_size_t size)
|
||
{
|
||
resetTM();//重设超时
|
||
struct rx_msg msg;
|
||
rt_err_t result;
|
||
|
||
static rt_size_t cachecnt=0;
|
||
cachecnt += size;
|
||
if (cachecnt < MIN_FRAME_LEN) {
|
||
LOG_W("not enough data, cached and waiting...");//处理半包
|
||
return;
|
||
}
|
||
msg.dev = dev;
|
||
msg.size = cachecnt;
|
||
|
||
result = rt_mq_send(&rx_mq, &msg, sizeof(msg));
|
||
if ( result == -RT_EFULL)
|
||
{
|
||
/* 消息队列满 */
|
||
LOG_W("message queue full！");
|
||
}
|
||
cachecnt = 0;
|
||
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/4 + 1];
|
||
|
||
while (1)
|
||
{
|
||
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, msg.size);
|
||
|
||
LOG_I("%d Bytes received from RS232",rx_length);
|
||
LOG_HEX("232rx:",16,rx_buffer,rx_length);//print what received.
|
||
parseRS232(rx_buffer, rx_length);
|
||
}
|
||
|
||
}
|
||
}
|
||
|
||
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[] = {0x01,0x03,0x00,0x00,0x00,0x1d,0x85,0xc3};
|
||
|
||
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 */
|
||
#ifdef TR485
|
||
struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT; /* 初 始 化 配 置 参 数 */
|
||
/* step2： 修 改 串 口 配 置 参 数 */
|
||
config.baud_rate = BAUD_RATE_9600; //修 改 波 特 率 为 9600
|
||
config.data_bits = DATA_BITS_8; //数 据 位 8
|
||
config.stop_bits = STOP_BITS_1; //停 止 位 1
|
||
config.bufsz = 128; //修 改 缓 冲 区 buff size 为 128
|
||
config.parity = PARITY_NONE; //无 奇 偶 校 验 位
|
||
/* 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 */
|
||
rt_device_control(serial, RT_DEVICE_CTRL_CONFIG, &config);
|
||
#endif
|
||
/* 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 */
|
||
#ifdef TR485
|
||
rt_pin_write(TR485_RE, PIN_HIGH);
|
||
rt_device_write(serial, 0, str, sizeof(str));
|
||
rt_pin_write(TR485_RE, PIN_LOW);
|
||
#endif
|
||
|
||
/* 创建 serial 线程 */
|
||
rt_thread_t thread = rt_thread_create("RS232", serial_thread_entry, RT_NULL, 1024*5, 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);
|
||
|
||
/**
|
||
* 发送数据到3S
|
||
* @param din
|
||
* @param len
|
||
*/
|
||
void sendTo3S(uint8_t *din, size_t len)
|
||
{
|
||
size_t rst = rt_device_write(serial, 0, din, len);
|
||
LOG_D("send %d Bytes done.",rst);
|
||
}
|
||
|
||
#ifdef DEMO
|
||
void sendData(int argc, char *argv[])
|
||
{
|
||
//待发数据
|
||
char str[][50] =
|
||
{
|
||
{0x01,0x03,0x00,0x00,0x00,0x1d,0x85,0xc3},
|
||
"hello\r\n",
|
||
{0x5A,0xA5, 0x31, 0x32, 0x19, 0x06, 0x00, 0x01, 0x01, 0x1C, 0xED }
|
||
};
|
||
|
||
size_t size[]={8,strlen(str[1]),11};//对应每一维数据长度
|
||
|
||
size_t index = 0;
|
||
if (argc == 2) {
|
||
index = atoi(argv[1]);
|
||
}
|
||
size_t rst = rt_device_write(serial, 0, str[index], size[index]);
|
||
LOG_D("send %d Bytes ok.",rst);
|
||
}
|
||
MSH_CMD_EXPORT(sendData,3所串口发送数据，参数为第几组数据)
|
||
#endif
|