arm开发板linux系统串口测试软件（RS232 RS485 UART）

#include "common.h" /* * v1.0 start to use version to manageme the code * * * */ int main(int argc, char **argv) { int i = 0, rd = 0; fd_set readFds; int retval; unsigned int count = 0, pos = 0; int mctrl = 0x8000; //TIOCM_LOOP; struct timeval respTime; unsigned char input_buf[bufsize], output_buf[bufsize], data_dev[64]; unsigned long long size = 0; int sendsize, sleeptime=0; int bitrate = 0; int j,error=0; /* to handle ctrl +c */ if(signal(SIGINT, signalHandler) == SIG_ERR) { printf("ERROR : Failed to register signal handler\n"); exit(1); } if (argc != 7 && argc != 8) { display_intro(); exit(1); } j = sscanf(argv[3],"%li",&ut.baudrate); if (j != 1) error = 1; j = sscanf(argv[4],"%i",&ut.flow_cntrl); if (j != 1) error = 1; j = sscanf(argv[5],"%i",&ut.max_delay); if (j != 1) error = 1; if (!(ut.max_delay >= 0 && ut.max_delay <= 100)) error = 1; j = sscanf(argv[6],"%i",&ut.random_enable); if (j != 1) error = 1; if (error){ printf("\n Invalid command line argument [argv] \n"); display_intro(); exit(1); } if(argv[7] == NULL){ ut.fd = open(UART_DEV_NAME, O_RDWR | O_NOCTTY | O_NDELAY | O_NONBLOCK ); }else{ ut.fd = open(argv[7], O_RDWR); } if (ut.fd == -1) { printf("open_port: Unable to open port - %s ", argv[7]); exit(1); } else fcntl(ut.fd, F_SETFL, 0); printf("Existing port baud=%d \n", getbaud(ut.fd)); /* save current port settings */ tcgetattr(ut.fd, &oldtio); initport(ut.fd, ut.baudrate, ut.flow_cntrl); printf("Configured port for New baud=%d\n", getbaud(ut.fd)); sscanf(argv[1],"%c",&tx_rx); //disable loopback mode mctrl = 0x0000; //TIOCM_LOOP; ioctl(ut.fd, 0x5418, &mctrl); //TIOCMSET switch (tx_rx) { case 't': printf("enter uart test mode\n"); #if 1 system("cat /sys/kernel/debug/clk/clk_summary | grep uart"); system("io -4 -l 0x100 0xff0e0004"); system("io -4 0xff0e000c 0x83"); system("io -4 0xff0e0000"); system("io -4 0xff0e0004"); system("io -4 0xff0e000c 0x03"); //system("io -4 0xff000088"); //system("io -4 -l 0x500 0xff500000"); #endif break; case 'r': read_flag = 0; #if 0 fd1 = open("/mnt/sdcard/uart.log", O_RDWR | O_CREAT); if(fd1 == -1) { printf("\n cannot open %s\n","/mnt/sdcard/uart.log"); } #endif while(1) { FD_ZERO(&readFds); FD_SET(ut.fd, &readFds); respTime.tv_sec = 10; respTime.tv_usec = 0; gettimeofday(&ut.start_time, NULL); /* Sleep for command timeout and expect the response to be ready. */ #if 0 retval = select(FD_SETSIZE, &readFds, NULL, NULL, &respTime); if (retval == 0 ) { if (read_flag == 0) { printf("\n Waited until timeout; no data was available to read. Exiting... \n"); if (unlink(argv[2]) == -1) printf("\n Failed to delete the file %s \n",argv[2]); close_port(); } else { //printf("\n select() timed out... waiting for more data\n"); continue; /*skip this loop because FD_SET doesn't have any data */ } } else if (retval == ERROR) printf("\n select: error :: %d\n",retval); /* Read data, abort if read fails. */ if(FD_ISSET(ut.fd, &readFds) != 0) { //fcntl(ut.fd, F_SETFL, FNDELAY); /* printf("\n entering readport func \n"); */ if(read_flag == 0) { //gettimeofday(&ut.start_time, NULL); read_flag = 1; printf("\n Reading data from port to file...\n"); } rd = readport(&ut.fd, output_buf); if (ERROR == rd) { printf("Read Port failed\n"); close_port(); } } #endif //rd = readport(&ut.fd, output_buf); rd = 0; usleep(10000); gettimeofday(&ut.end_time, NULL); timersub(&ut.end_time, &ut.start_time, &ut.diff_time); //if (ut.diff_time.tv_usec > 15000) // printf("\n gap:%dus\n", ut.diff_time.tv_sec * 1000000 + ut.diff_time.tv_usec); //if(rd == 0) // break; #if 1 for (i = 0; i < rd; i++) { if (output_buf[i] != 0x55) { count++; printf("error[%d] is %02x\n", i, output_buf[i]); } } #endif size += rd; //i = writeport(&ut.fd, output_buf, rd); #if 0 if (rd != 0) printf("#Read %d bytes from port , total error:%d total:%lld\n",rd, count, size); #endif #if 0 gettimeofday(&ut.start_time, NULL); sprintf(data_dev, "/mnt/sdcard/%lld.txt", (ut.start_time.tv_sec * 1000000 + ut.start_time.tv_usec)); fd1 = open(data_dev, O_RDWR | O_CREAT); if(fd1 == -1) { printf("\n cannot open %s\n",data_dev); } else { printf("\n write %d data to file %s...\n", rd, data_dev); } write(fd1, output_buf, rd); close(fd1); #else //write(fd1, output_buf, rd); #endif memset(output_buf, 0, bufsize); } //gettimeofday(&ut.end_time,NULL); printf("\n Read %lld bytes from port error:%d \n",size, count); FD_CLR(ut.fd, &readFds); break; case 's': fd1 = open(argv[2],O_RDONLY); if(fd1 == -1) { printf("\n cannot open %s, send 0x55 instead\n",argv[2]); } else { printf("\n Sending data from file to port...\n"); } if (fd1 > 0) gettimeofday(&ut.start_time, NULL); while(1) { if (ut.random_enable != 0) sendsize = get_rand_value(bufsize); else sendsize = bufsize; if (fd1 > 0) { rd = read(fd1, &input_buf, sendsize); if(rd == 0) break; } else { memset(input_buf, 0x55, sendsize); rd = sendsize; } //printf("\n Read from input file %d bytes \n",rd); FD_ZERO(&readFds); FD_SET(ut.fd, &readFds); respTime.tv_sec = 10; respTime.tv_usec = 0; fcntl(ut.fd, F_SETFL, 0); /* Sleep for command timeout and expect the response to be ready. */ retval = select(FD_SETSIZE, NULL, &readFds, NULL, &respTime); if (retval == 0 ) { printf("\n Waited tx until timeout... \n"); while(1) { sleep(10); } } else if (retval == ERROR) { printf("\n select: error :: %d\n",retval); } if(FD_ISSET(ut.fd, &readFds) != 0) { if (fd1 <= 0) gettimeofday(&ut.start_time,NULL); if (writeport(&ut.fd, input_buf, rd) < 0) { printf("\n Writing to port failed\n"); close_port(); } else size += rd; if (fd1 <= 0) gettimeofday(&ut.end_time,NULL); } #ifdef ANDROID_FS /* tcdrain not available on ANDROID */ ioctl(ut.fd, TCSBRK, 1); //equivalent to tcdrain(). perhaps permanent replacement? #else if(ERROR == tcdrain(ut.fd)) printf("\n tcdrain failure \n"); #endif memset(input_buf,0,bufsize); if (ut.max_delay) { sleeptime = get_rand_value(ut.max_delay); printf("\n Sleeping for %u seconds...\n",sleeptime); sleep(sleeptime); /*sleep for a maximum of X random secs */ system("echo 1 > /sys/devices/platform/serial8250.0/uart1_rts_toggle"); } if (fd1 <= 0) break; } if (fd1 > 0) gettimeofday(&ut.end_time,NULL); timersub(&ut.end_time, &ut.start_time, &ut.diff_time); bitrate = size * 10 * 1000000 / (ut.diff_time.tv_sec * 1000000 + ut.diff_time.tv_usec); printf("\n Written %lld bytes to port, dbitrate is: %d bps\n",size, bitrate); //use to check baudrate /* Wait for 5 seconds for Transmitting to complete before sending the Break sequence */ sleep(1); break; case 'm': #if 1 //set loopback mode mctrl = 0x8000; ioctl(ut.fd, 0x5418, &mctrl); //TIOCMSET #endif fd1 = open(argv[2], O_RDONLY); if(fd1 == -1) { printf("\n cannot open %s \n",argv[2]); for (i = 0; i < bufsize; i++) input_buf[i] = i % 256; rd = bufsize; } else { rd = read(fd1, &input_buf, bufsize); printf("Read %d bytes data from file\n", rd); printf("Sending data from file to port...\n"); } printf("Sending 0.1..255 data to port...\n"); gettimeofday(&ut.start_time, NULL); size = 0; while(1) { if (ut.random_enable != 0) sendsize = get_rand_value(bufsize); else sendsi