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[/] [eco32/] [trunk/] [hwtests/] [serial/] [fpga2pc/] [receive.c] - Rev 247
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/* * receive.c -- serial line test program */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <stdarg.h> #include <fcntl.h> #include <unistd.h> #include <termios.h> #define NUM_TRIES 10 #define SYN 0x16 #define ACK 0x06 static FILE *diskFile = NULL; static int sfd = 0; static struct termios origOptions; static struct termios currOptions; void serialClose(void); void error(char *fmt, ...) { va_list ap; va_start(ap, fmt); printf("Error: "); vprintf(fmt, ap); printf("\n"); va_end(ap); if (diskFile != NULL) { fclose(diskFile); diskFile = NULL; } if (sfd != 0) { serialClose(); sfd = 0; } exit(1); } void serialOpen(char *serialPort) { sfd = open(serialPort, O_RDWR | O_NOCTTY | O_NDELAY); if (sfd == -1) { error("cannot open serial port '%s'", serialPort); } tcgetattr(sfd, &origOptions); currOptions = origOptions; cfsetispeed(&currOptions, B38400); cfsetospeed(&currOptions, B38400); currOptions.c_cflag |= (CLOCAL | CREAD); currOptions.c_cflag &= ~PARENB; currOptions.c_cflag &= ~CSTOPB; currOptions.c_cflag &= ~CSIZE; currOptions.c_cflag |= CS8; currOptions.c_cflag &= ~CRTSCTS; currOptions.c_lflag &= ~(ICANON | ECHO | ECHONL | ISIG | IEXTEN); currOptions.c_iflag &= ~(IGNBRK | BRKINT | IGNPAR | PARMRK); currOptions.c_iflag &= ~(INPCK | ISTRIP | INLCR | IGNCR | ICRNL); currOptions.c_iflag &= ~(IXON | IXOFF | IXANY); currOptions.c_oflag &= ~(OPOST | ONLCR | OCRNL | ONOCR | ONLRET); tcsetattr(sfd, TCSANOW, &currOptions); } void serialClose(void) { tcsetattr(sfd, TCSANOW, &origOptions); close(sfd); } int serialSnd(unsigned char b) { int n; n = write(sfd, &b, 1); return n == 1; } int serialRcv(unsigned char *bp) { int n; n = read(sfd, bp, 1); return n == 1; } int main(int argc, char *argv[]) { char *serialPort; unsigned char prev, curr; int count, errors; if (argc != 2) { printf("Usage: %s <serial port>\n", argv[0]); exit(1); } serialPort = argv[1]; serialOpen(serialPort); count = 0; errors = 0; while (!serialRcv(&prev)) ; count++; while (count < 100000) { while (!serialRcv(&curr)) ; count++; if (((prev + 1) & 0xFF) != curr) { errors++; } prev = curr; } if (sfd != 0) { serialClose(); sfd = 0; } printf("count = %d (ok = %d, errors = %d)\n", count, count - errors, errors); return 0; }
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