FreeCalypso > hg > fc-tourmaline
view bwsplash/pbm2c.c @ 268:f2e52cab0a73
abb_inth.c: check all interrupt causes, not just one
The original code used if - else if - else if etc constructs, thus
the first detected interrupt was the only one handled. However,
Iota ITSTATREG is a clear-on-read register, thus if we only handle
the first detected interrupt and skip checking the others, then the
other interrupts will be lost, if more than one interrupt happened
to occur in one ABB interrupt handling cycle - a form of rare race
condition. Change the code to check all interrupts that were read
in this cycle.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Sun, 13 Jun 2021 18:17:53 +0000 |
parents | 4d9f24c501f3 |
children |
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line source
/* * This program compiles bwsplash.pbm into a C char array * for inclusion into phone UI firmware source. */ #include <sys/types.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <strings.h> FILE *inf, *outf; char *infname, linebuf[128]; int lineno; void get_input_line() { char *cp; if (!fgets(linebuf, sizeof linebuf, inf)) { fprintf(stderr, "%s: premature EOF\n", infname); exit(1); } lineno++; cp = index(linebuf, '\n'); if (!cp) { fprintf(stderr, "%s line %d: too long or missing newline\n", infname, lineno); exit(1); } *cp = '\0'; } void parse_pixel_line(outbuf, npix) u_char *outbuf; unsigned npix; { char *cp; u_char *dp; unsigned n; cp = linebuf; dp = outbuf; for (n = 0; n < npix; n++) { if (*cp != '0' && *cp != '1') { inv: fprintf(stderr, "%s line %d: does not match expected line of %u 0/1 characters\n", infname, lineno, npix); exit(1); } *dp++ = *cp++ - '0'; } if (*cp) goto inv; } void pack_pixel_byte(bits) u_char *bits; { unsigned byte, mask, n; byte = 0; for (n = 0, mask = 0x80; n < 8; n++, mask >>= 1) if (bits[n]) byte |= mask; fprintf(outf, "0x%02X,", byte); } main(argc, argv) char **argv; { unsigned nrow, ncol; u_char rowbuf[80]; if (argc != 3) { fprintf(stderr, "usage: %s pbmfile outfile\n", argv[0]); exit(1); } infname = argv[1]; inf = fopen(infname, "r"); if (!inf) { perror(infname); exit(1); } get_input_line(); if (strcmp(linebuf, "P1")) { fprintf(stderr, "error in %s: first line is not the expected \"P1\"\n", infname); exit(1); } get_input_line(); if (strcmp(linebuf, "80 30")) { fprintf(stderr, "error in %s: second line is not the expected \"80 30\"\n", infname); exit(1); } outf = fopen(argv[2], "w"); if (!outf) { perror(argv[2]); exit(1); } for (nrow = 0; nrow < 30; nrow++) { get_input_line(); parse_pixel_line(rowbuf, 80); putc('\t', outf); for (ncol = 0; ncol < 80; ncol += 8) pack_pixel_byte(rowbuf + ncol); putc('\n', outf); } exit(0); }