| /* |
| * utils.c |
| * |
| * Copyright (C) 2019-2020 Sylvain Munaut <tnt@246tNt.com> |
| * SPDX-License-Identifier: LGPL-3.0-or-later |
| */ |
| |
| #include <stdarg.h> |
| #include <stdint.h> |
| #include <stdbool.h> |
| |
| #include "console.h" |
| #include "led.h" |
| #include "mini-printf.h" |
| #include "misc.h" |
| |
| char * |
| hexstr(void *d, int n, bool space) |
| { |
| static const char * const hex = "0123456789abcdef"; |
| static char buf[96]; |
| uint8_t *p = d; |
| char *s = buf; |
| char c; |
| |
| while (n--) { |
| c = *p++; |
| *s++ = hex[c >> 4]; |
| *s++ = hex[c & 0xf]; |
| if (space) |
| *s++ = ' '; |
| } |
| |
| s[space?-1:0] = '\0'; |
| |
| return buf; |
| } |
| |
| |
| void |
| _panic(const char *file, int lineno, const char *fmt, ...) |
| { |
| char buf[256]; |
| va_list va; |
| int l; |
| |
| /* Fast hard red blinking led */ |
| led_state(true); |
| led_color(255, 0, 8); |
| led_breathe(false, 0, 0); |
| led_blink(true, 75, 75); |
| |
| /* Prepare buffer */ |
| l = mini_snprintf(buf, 255, "PANIC @ %s:%d = ", file, lineno); |
| |
| va_start(va, fmt); |
| l += mini_vsnprintf(buf+l, 255-l, fmt, va); |
| va_end(va); |
| |
| buf[l] = '\n'; |
| buf[l+1] = '\0'; |
| |
| /* Print once */ |
| puts(buf); |
| |
| /* Loop waiting for commands */ |
| while (1) { |
| int cmd = getchar_nowait(); |
| |
| switch (cmd) { |
| case 'b': |
| /* Reboot */ |
| reboot(2); |
| break; |
| case ' ': |
| /* Print error again */ |
| puts(buf); |
| break; |
| } |
| } |
| } |