TT12-MCU/applications/RS_485.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_INFO
#include <ulog.h>

#define TR485

#define SAMPLE_UART_NAME       "uart6"      /* 串口设备名称 */


static rt_timer_t timer485;

#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 serial485;
/* 消息队列控制块 */
static struct rt_messagequeue rx485_mq;
//static char rx_buffer[RT_SERIAL_RB_BUFSZ/4 + 1];

/* 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;

    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 -1;
    }
    msg.dev = dev;
    msg.size = cachecnt;

    result = rt_mq_send(&rx485_mq, &msg, sizeof(msg));
    if ( result == -RT_EFULL)
    {
        /* 消息队列满 */
        LOG_W("485 message queue full！");
    }
    cachecnt = 0;
    return result;
}


typedef struct{
    uint8_t norVol[2];
    uint8_t cnt[2];
    uint8_t level[2];
    uint8_t Ah[2];
    uint8_t current[2];
    uint8_t incu[2];
    uint8_t temp1[2];
    uint8_t temp2[2];
    uint8_t temp3[2];
    uint8_t vol1[2];
}BATT_INFO;
static BATT_INFO batt;

void sendCMD()
{
    uint8_t cmd[] = { 0x01, 0x03, 0x00, 0x00, 0x00, 0x1d, 0x85, 0xc3 };

    //send cmd
    rt_pin_write(TR485_RE, PIN_HIGH);
    rt_device_write(serial485, 0, cmd, sizeof(cmd));
    rt_pin_write(TR485_RE, PIN_LOW);
}

void parseBattInfo(uint8_t *din, size_t len)
{
    LOG_HEX("batt",16,din,len);
    uint8_t head[]={0x01,0x03,0x3a};
    if (rt_memcmp(din, head, sizeof(head)) != 0) {
        LOG_W("answer from battery is error.");
    }
    rt_memcpy(&batt, din+sizeof(head), sizeof(batt));
    LOG_D("batt=%X,%X,%d\%",batt.level[0],batt.level[1]);
}
static uint16_t b2v(uint8_t *din)
{
    return din[0] << 8 + din[1];
}
void dumpBattInfo()
{
    rt_kprintf("标称电压         %s",b2v(batt.norVol));
    rt_kprintf("电芯数量         %s",b2v(batt.cnt));
    rt_kprintf("电量                %s",b2v(batt.level));
    rt_kprintf("容量                %s",b2v(batt.Ah));
    rt_kprintf("输出电流         %s",b2v(batt.current));
    rt_kprintf("充电电流         %s",b2v(batt.incu));
    rt_kprintf("温度1      %s",b2v(batt.temp1));
    rt_kprintf("温度2      %s",b2v(batt.temp2));
    rt_kprintf("温度3      %s",b2v(batt.temp3));
    rt_kprintf("电芯 1电压      %s",b2v(batt.vol1));
}
/**
 * 获取电池电量
 * @return
 */
uint8_t getPowerLevel(void)
{
    return batt.level[1];
}

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(&rx485_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);
            if (!rx_length) {
                LOG_W("read from RS485 error");
                continue;
            }
            LOG_I("%d Bytes received from RS485",rx_length);
            LOG_HEX("485rx:",16,rx_buffer,rx_length);//print what received.
            parseBattInfo(rx_buffer, rx_length);
        }

    }




}

static int uart485_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 */
    serial485 = rt_device_find(uart_name);
    if (!serial485)
    {
        LOG_E("find %s failed!", uart_name);
        return RT_ERROR;
    }

    /* 初始化消息队列 */
    rt_mq_init(&rx485_mq, "rx485_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(serial485, 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(serial485, RT_DEVICE_FLAG_DMA_RX);
    /* 设置接收回调函数 */
    rt_device_set_rx_indicate(serial485, 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("RS485", serial_thread_entry, RT_NULL, 1024*2, 30-2, 10);
    /* 创建成功则启动线程 */
    if (thread != RT_NULL)
    {
        rt_thread_startup(thread);
    }
    else
    {
        ret = RT_ERROR;
    }

    timer485 = rt_timer_create("batt", sendCMD, RT_NULL, rt_tick_from_millisecond(10*1000), RT_TIMER_FLAG_PERIODIC);

    /* 启动定时器1 */
    if (timer485 != RT_NULL)
        rt_timer_start(timer485);

    return ret;
}





/* 导出到 msh 命令列表中 */
INIT_APP_EXPORT(uart485_dma_sample);
MSH_CMD_EXPORT(dumpBattInfo,解析电池信息);