Wed, 01 Apr 2009 22:11:05 +0100
initial commit
| philpem@0 | 1 | #include <stdio.h> |
| philpem@0 | 2 | #include <stdlib.h> |
| philpem@0 | 3 | #include "hexdump.h" |
| philpem@0 | 4 | |
| philpem@0 | 5 | #define ESC 0x1b |
| philpem@0 | 6 | |
| philpem@0 | 7 | int main(int argc, char **argv) |
| philpem@0 | 8 | { |
| philpem@0 | 9 | FILE *prn; |
| philpem@0 | 10 | |
| philpem@0 | 11 | // check command line args |
| philpem@0 | 12 | if (argc < 2) { |
| philpem@0 | 13 | printf("ERROR: must specify device name\n"); |
| philpem@0 | 14 | return -1; |
| philpem@0 | 15 | } |
| philpem@0 | 16 | |
| philpem@0 | 17 | // open printer device |
| philpem@0 | 18 | if ((prn = fopen(argv[1], "r+b")) == NULL) { |
| philpem@0 | 19 | printf("ERROR: couldn't open printer device '%s'\n", argv[1]); |
| philpem@0 | 20 | return -1; |
| philpem@0 | 21 | } |
| philpem@0 | 22 | |
| philpem@0 | 23 | // INITIALISE |
| philpem@0 | 24 | fprintf(prn, "%c%c", ESC, '@'); |
| philpem@0 | 25 | |
| philpem@0 | 26 | // REQUEST STATUS |
| philpem@0 | 27 | fprintf(prn, "%c%c%c", ESC, 'i', 'S'); |
| philpem@0 | 28 | |
| philpem@0 | 29 | // Read status buffer from printer |
| philpem@0 | 30 | unsigned char buf[32]; |
| philpem@0 | 31 | int timeout = 128; |
| philpem@0 | 32 | do { |
| philpem@0 | 33 | fread(buf, 1, 32, prn); |
| philpem@0 | 34 | } while ((buf[0] != 0x80) && (timeout-- > 0)); |
| philpem@0 | 35 | |
| philpem@0 | 36 | if (timeout > 0) { |
| philpem@0 | 37 | printf("Printer status:\n"); |
| philpem@0 | 38 | hex_dump(buf, 32); |
| philpem@0 | 39 | } else { |
| philpem@0 | 40 | printf("TIMEOUT\n"); |
| philpem@0 | 41 | return -1; |
| philpem@0 | 42 | } |
| philpem@0 | 43 | |
| philpem@0 | 44 | // Close the printer stream |
| philpem@0 | 45 | fclose(prn); |
| philpem@0 | 46 | return 0; |
| philpem@0 | 47 | } |