mirror of
https://github.com/trezor/trezor-firmware.git
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82 lines
1.9 KiB
C
82 lines
1.9 KiB
C
/*
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* This file is part of the TREZOR project.
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*
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* Copyright (C) 2014 Pavol Rusnak <stick@satoshilabs.com>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <libopencm3/cm3/scb.h>
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#include "util.h"
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inline void delay(uint32_t wait)
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{
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while (--wait > 0) __asm__("nop");
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}
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static const char *hexdigits = "0123456789ABCDEF";
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void uint32hex(uint32_t num, char *str)
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{
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uint32_t i;
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for (i = 0; i < 8; i++) {
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str[i] = hexdigits[(num >> (28 - i * 4)) & 0xF];
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}
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}
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// converts data to hexa
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void data2hex(const void *data, uint32_t len, char *str)
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{
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uint32_t i;
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const uint8_t *cdata = (uint8_t *)data;
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for (i = 0; i < len; i++) {
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str[i * 2 ] = hexdigits[(cdata[i] >> 4) & 0xF];
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str[i * 2 + 1] = hexdigits[cdata[i] & 0xF];
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}
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str[len * 2] = 0;
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}
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uint32_t readprotobufint(uint8_t **ptr)
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{
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uint32_t result = (**ptr & 0x7F);
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if (**ptr & 0x80) {
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(*ptr)++;
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result += (**ptr & 0x7F) * 128;
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if (**ptr & 0x80) {
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(*ptr)++;
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result += (**ptr & 0x7F) * 128 * 128;
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if (**ptr & 0x80) {
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(*ptr)++;
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result += (**ptr & 0x7F) * 128 * 128 * 128;
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if (**ptr & 0x80) {
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(*ptr)++;
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result += (**ptr & 0x7F) * 128 * 128 * 128 * 128;
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}
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}
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}
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}
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(*ptr)++;
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return result;
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}
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void __attribute__((noreturn)) system_halt(void)
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{
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for (;;) {} // loop forever
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}
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void __attribute__((noreturn)) system_reset(void)
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{
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scb_reset_system();
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}
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