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/*
* The MIT License (MIT)
*
* Copyright (c) 2015 Matthias P. Braendli
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <stddef.h>
#include <stdint.h>
#include "debug.h"
#define _DEBUG 1
#if _DEBUG
void debug_send_command(int command, void *message)
{
__asm__ volatile (
"mov r0, %[cmd];"
"mov r1, %[msg];"
"bkpt #0xAB"
:
: [cmd] "r" (command), [msg] "r" (message)
: "r0", "r1", "memory");
}
void put_char(char c)
{
__asm__ volatile (
"mov r0, #0x03\n" /* SYS_WRITEC */
"mov r1, %[msg]\n"
"bkpt #0xAB\n"
:
: [msg] "r" (&c)
: "r0", "r1"
);
}
void debug_print(const char* str)
{
const int std_err = 2;
int strlen = 0;
const char* s;
s = str;
while (*s) {
strlen++;
s++;
}
uint32_t m[] = { std_err, (uint32_t)str, strlen };
debug_send_command(0x05, m);
}
#else
void debug_send_command(int command, void *message) { }
void put_char(char c) { }
void debug_print(const char* str) { }
#endif
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