| 1 | /* serial_test.c |
| 2 | |
| 3 | Read/write data via serial I/O |
| 4 | |
| 5 | This program is distributed under the GPL, version 2 |
| 6 | */ |
| 7 | |
| 8 | #include <stdio.h> |
| 9 | #include <stdlib.h> |
| 10 | #include <unistd.h> |
| 11 | #include <getopt.h> |
| 12 | #include <signal.h> |
| 13 | #include <ftdi.h> |
| 14 | |
| 15 | static int exitRequested = 0; |
| 16 | /* |
| 17 | * sigintHandler -- |
| 18 | * |
| 19 | * SIGINT handler, so we can gracefully exit when the user hits ctrl-C. |
| 20 | */ |
| 21 | static void |
| 22 | sigintHandler(int signum) |
| 23 | { |
| 24 | exitRequested = 1; |
| 25 | } |
| 26 | |
| 27 | int main(int argc, char **argv) |
| 28 | { |
| 29 | struct ftdi_context *ftdi; |
| 30 | unsigned char buf[1024]; |
| 31 | int f = 0, i; |
| 32 | int vid = 0x403; |
| 33 | int pid = 0; |
| 34 | int baudrate = 115200; |
| 35 | int interface = INTERFACE_ANY; |
| 36 | int do_write = 0; |
| 37 | unsigned int pattern = 0xffff; |
| 38 | int retval = EXIT_FAILURE; |
| 39 | |
| 40 | while ((i = getopt(argc, argv, "i:v:p:b:w::")) != -1) |
| 41 | { |
| 42 | switch (i) |
| 43 | { |
| 44 | case 'i': // 0=ANY, 1=A, 2=B, 3=C, 4=D |
| 45 | interface = strtoul(optarg, NULL, 0); |
| 46 | break; |
| 47 | case 'v': |
| 48 | vid = strtoul(optarg, NULL, 0); |
| 49 | break; |
| 50 | case 'p': |
| 51 | pid = strtoul(optarg, NULL, 0); |
| 52 | break; |
| 53 | case 'b': |
| 54 | baudrate = strtoul(optarg, NULL, 0); |
| 55 | break; |
| 56 | case 'w': |
| 57 | do_write = 1; |
| 58 | if (optarg) |
| 59 | pattern = strtoul(optarg, NULL, 0); |
| 60 | if (pattern > 0xff) |
| 61 | { |
| 62 | fprintf(stderr, "Please provide a 8 bit pattern\n"); |
| 63 | exit(-1); |
| 64 | } |
| 65 | break; |
| 66 | default: |
| 67 | fprintf(stderr, "usage: %s [-i interface] [-v vid] [-p pid] [-b baudrate] [-w [pattern]]\n", *argv); |
| 68 | exit(-1); |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | // Init |
| 73 | if ((ftdi = ftdi_new()) == 0) |
| 74 | { |
| 75 | fprintf(stderr, "ftdi_new failed\n"); |
| 76 | return EXIT_FAILURE; |
| 77 | } |
| 78 | |
| 79 | if (!vid && !pid && (interface == INTERFACE_ANY)) |
| 80 | { |
| 81 | ftdi_set_interface(ftdi, INTERFACE_ANY); |
| 82 | struct ftdi_device_list *devlist; |
| 83 | int res; |
| 84 | if ((res = ftdi_usb_find_all(ftdi, &devlist, 0, 0)) < 0) |
| 85 | { |
| 86 | fprintf(stderr, "No FTDI with default VID/PID found\n"); |
| 87 | goto do_deinit; |
| 88 | } |
| 89 | if (res == 1) |
| 90 | { |
| 91 | f = ftdi_usb_open_dev(ftdi, devlist[0].dev); |
| 92 | if (f<0) |
| 93 | { |
| 94 | fprintf(stderr, "Unable to open device %d: (%s)", |
| 95 | i, ftdi_get_error_string(ftdi)); |
| 96 | } |
| 97 | } |
| 98 | ftdi_list_free(&devlist); |
| 99 | if (res > 1) |
| 100 | { |
| 101 | fprintf(stderr, "%d Devices found, please select Device with VID/PID\n", res); |
| 102 | /* TODO: List Devices*/ |
| 103 | goto do_deinit; |
| 104 | } |
| 105 | if (res == 0) |
| 106 | { |
| 107 | fprintf(stderr, "No Devices found with default VID/PID\n"); |
| 108 | goto do_deinit; |
| 109 | } |
| 110 | } |
| 111 | else |
| 112 | { |
| 113 | // Select interface |
| 114 | ftdi_set_interface(ftdi, interface); |
| 115 | |
| 116 | // Open device |
| 117 | f = ftdi_usb_open(ftdi, vid, pid); |
| 118 | } |
| 119 | if (f < 0) |
| 120 | { |
| 121 | fprintf(stderr, "unable to open ftdi device: %d (%s)\n", f, ftdi_get_error_string(ftdi)); |
| 122 | exit(-1); |
| 123 | } |
| 124 | |
| 125 | // Set baudrate |
| 126 | f = ftdi_set_baudrate(ftdi, baudrate); |
| 127 | if (f < 0) |
| 128 | { |
| 129 | fprintf(stderr, "unable to set baudrate: %d (%s)\n", f, ftdi_get_error_string(ftdi)); |
| 130 | exit(-1); |
| 131 | } |
| 132 | |
| 133 | /* Set line parameters |
| 134 | * |
| 135 | * TODO: Make these parameters settable from the command line |
| 136 | * |
| 137 | * Parameters are choosen that sending a continous stream of 0x55 |
| 138 | * should give a square wave |
| 139 | * |
| 140 | */ |
| 141 | f = ftdi_set_line_property(ftdi, 8, STOP_BIT_1, NONE); |
| 142 | if (f < 0) |
| 143 | { |
| 144 | fprintf(stderr, "unable to set line parameters: %d (%s)\n", f, ftdi_get_error_string(ftdi)); |
| 145 | exit(-1); |
| 146 | } |
| 147 | |
| 148 | if (do_write) |
| 149 | for(i=0; i<1024; i++) |
| 150 | buf[i] = pattern; |
| 151 | |
| 152 | signal(SIGINT, sigintHandler); |
| 153 | while (!exitRequested) |
| 154 | { |
| 155 | if (do_write) |
| 156 | f = ftdi_write_data(ftdi, buf, |
| 157 | (baudrate/512 >sizeof(buf))?sizeof(buf): |
| 158 | (baudrate/512)?baudrate/512:1); |
| 159 | else |
| 160 | f = ftdi_read_data(ftdi, buf, sizeof(buf)); |
| 161 | if (f<0) |
| 162 | usleep(1 * 1000000); |
| 163 | else if(f> 0 && !do_write) |
| 164 | { |
| 165 | fprintf(stderr, "read %d bytes\n", f); |
| 166 | fwrite(buf, f, 1, stdout); |
| 167 | fflush(stderr); |
| 168 | fflush(stdout); |
| 169 | } |
| 170 | } |
| 171 | signal(SIGINT, SIG_DFL); |
| 172 | retval = EXIT_SUCCESS; |
| 173 | |
| 174 | ftdi_usb_close(ftdi); |
| 175 | do_deinit: |
| 176 | ftdi_free(ftdi); |
| 177 | |
| 178 | return retval; |
| 179 | } |