45 lines
1.0 KiB
C
45 lines
1.0 KiB
C
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <termios.h>
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#include <string.h>
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int main() {
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int fd;
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struct termios options;
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fd = open("/dev/ttyS3", O_RDWR | O_NOCTTY | O_NDELAY);
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if (fd == -1) {
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perror("can not open serial port");
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return -1;
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}
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/* config serial port */
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tcgetattr(fd, &options);
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options.c_cflag = B115200 | CS8 | CLOCAL | CREAD;
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options.c_iflag = IGNPAR;
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options.c_oflag = 0;
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options.c_lflag = 0;
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tcflush(fd, TCIFLUSH);
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tcsetattr(fd, TCSANOW, &options);
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uint8_t buffer_w[] = {0x09, 0x04, 0x00, 0x00, 0x00, 0x20, 0xF0, 0x9A};
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uint8_t buffer_r[256];
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while (1) {
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write(fd, buffer_w, sizeof(buffer_w));
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sleep(1);
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int num_bytes = read(fd, buffer_r, sizeof(buffer_r));
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for (int i = 0; i < num_bytes; i++) {
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printf("%02X ", buffer_r[i]);
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}
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printf("\r\n");
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fflush(stdout);
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}
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close(fd);
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return 0;
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}
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