uart_simple_tester/uart_read_test_main.cpp

/*
 *  Created on: Aug 5, 2019
 *      Author: Cristian Fatu
 *      This project implements a basic UART communication over UART on
 * Petalinux, unsing Uart Lite linux driver. The hardware platform implements an
 * UART Lite IP core and the device tree (in pl.dtsi) sets the appropriate
 * parameters.  After booting linux, the "/dev/ttyUL1" must be present.
 */

#include <fcntl.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>

#include "uart.h"

#define MAX_RECV_SIZE 235

void openuart(struct UartDevice *device, char *devname, int rate) {
  device->name = devname;
  device->rate = rate;

  printf("UART open  %s\n", device->name);
  int rc = uartStart(device, 0);
  if (rc) {
    printf("uartStart %s fail\n", device->name);
    exit(-1);
  }
}

int main(int argc, char *argv[]) {
  struct UartDevice dev = {0};
  // struct UartDevice dev2 = {0};

  if (argc != 2) {
    printf("Usage:%s dev1\n", argv[0]);
    // printf("Demo:%s /dev/ttyUSB0 /dev/ttyUSB1\n", argv[0]);
    exit(-1);
  }

  openuart(&dev, argv[1], B9600);
  // openuart(&dev, argv[1], B115200);
  // openuart(&dev2, argv[2], B9600);
  char buf[1024] = {0};
  memset(buf, 0x55, 1024);
  for (size_t i = 0;; i++) {
    int ret1, ret2;
    ret1 = uartReceive(&dev, buf, 2/*接收的字节数2-1*/);  // send the received text over UART
    if (ret1 != 0) {
      // printf("receive %d %x characters %d\n", ret1, buf[0], i);
        printf("%x\n", buf[0]);

      if (buf[0] != 0x12 && buf[0] != 0x34 && buf[0] != 0x56 &&
          buf[0] != 0x78 && buf[0] != 0x9a) {
        printf("....................................................%x\n", buf[0]);
      }
    }
    //  ret2 = uartSend(&dev2, buf, 1);  // send the received text over UART
    // usleep(1*1000);
  }

  while (1) {
    sleep(1);
  }

  return 0;
}