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 <map>
#include <set>
#include <string>

#include "uart.h"

#define MAX_RECV_SIZE 235
using namespace std;
map<string, uint32_t> g_baundmap = {
    {"0", 0000000},       {"50", 0000001},      {"75", 0000002},      {"110", 0000003},      //
    {"134", 0000004},     {"150", 0000005},     {"200", 0000006},     {"300", 0000007},      //
    {"600", 0000010},     {"1200", 0000011},    {"1800", 0000012},    {"2400", 0000013},     //
    {"4800", 0000014},    {"9600", 0000015},    {"19200", 0000016},   {"38400", 0000017},    //
    {"57600", 0010001},   {"115200", 0010002},  {"230400", 0010003},  {"460800", 0010004},   //
    {"500000", 0010005},  {"576000", 0010006},  {"921600", 0010007},  {"1000000", 0010010},  //
    {"1152000", 0010011}, {"1500000", 0010012}, {"2000000", 0010013}, {"2500000", 0010014},  //
    {"3000000", 0010015}, {"3500000", 0010016}, {"4000000", 0010017},
};

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};
  if (argc != 3) {
    printf("Usage: %s /dev/ttyUSB0 115200\n", argv[0]);
    return -1;
  }
  printf("device name:%s\n", argv[1]);
  printf("baundrate  :%s\n", argv[2]);

  auto baundrate_find_result = g_baundmap.find(argv[2]);
  if (baundrate_find_result == g_baundmap.end()) {
    printf("unsupport baundrate\n");
    return -1;
  };

  openuart(&dev, argv[1], baundrate_find_result->second);
  char buf[1024] = {0};
  memset(buf, 0x55, 1024);
  for (size_t i = 0;;) {
    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("%x", buf[0]);
      i++;
      if (i % 20 == 0) {
        printf("\n");
      }
    }
    fflush(stdout);
  }

  while (1) {
    sleep(1);
  }

  return 0;
}