89 lines
2.2 KiB
C
89 lines
2.2 KiB
C
|
#include <stdint.h>
|
||
|
|
#include "systems.h"
|
||
|
|
#include <string.h>
|
||
|
|
#include <stm32f30x.h>
|
||
|
|
#include <stm32f30x_rcc.h>
|
||
|
|
#include <stm32f30x_gpio.h>
|
||
|
|
#include <core_cm4.h>
|
||
|
|
#include <core_cmFunc.h>
|
||
|
|
|
||
|
|
extern RCC_ClocksTypeDef RCC_Clocks;
|
||
|
|
|
||
|
|
//For precise timing.
|
||
|
|
volatile unsigned int *DWT_CYCCNT = (volatile unsigned int *)0xE0001004; //address of the register
|
||
|
|
volatile unsigned int *SCB_DEMCR = (volatile unsigned int *)0xE000EDFC; //address of the register
|
||
|
|
volatile unsigned int *DWT_CONTROL = (volatile unsigned int *)0xE0001000; //address of the register
|
||
|
|
|
||
|
|
void send_openocd_command(int command, void *message)
|
||
|
|
{
|
||
|
|
#ifdef DEBUG
|
||
|
|
asm("mov r0, %[cmd];"
|
||
|
|
"mov r1, %[msg];"
|
||
|
|
"bkpt #0xAB"
|
||
|
|
:
|
||
|
|
: [cmd] "r" (command), [msg] "r" (message)
|
||
|
|
: "r0", "r1", "memory");
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void send_text( const char * text )
|
||
|
|
{
|
||
|
|
uint32_t m[] = { 2, (uint32_t)text, strlen(text) };
|
||
|
|
send_openocd_command(0x05, m);
|
||
|
|
}
|
||
|
|
|
||
|
|
int _write (int fd, const void *buf, size_t count)
|
||
|
|
{
|
||
|
|
uint32_t m[] = { 2, (uint32_t)buf, count };
|
||
|
|
send_openocd_command(0x05, m);
|
||
|
|
}
|
||
|
|
|
||
|
|
void * _sbrk(int incr) {
|
||
|
|
extern char _ebss; // Defined by the linker
|
||
|
|
static char *heap_end;
|
||
|
|
char *prev_heap_end;
|
||
|
|
|
||
|
|
|
||
|
|
if (heap_end == 0) {
|
||
|
|
heap_end = &_ebss;
|
||
|
|
}
|
||
|
|
prev_heap_end = heap_end;
|
||
|
|
|
||
|
|
char * stack = (char*) __get_MSP();
|
||
|
|
if (heap_end + incr > stack)
|
||
|
|
{
|
||
|
|
return (void*)(-1);
|
||
|
|
}
|
||
|
|
|
||
|
|
heap_end += incr;
|
||
|
|
|
||
|
|
return (void*) prev_heap_end;
|
||
|
|
}
|
||
|
|
|
||
|
|
void _delay_us(uint32_t us) {
|
||
|
|
if( us ) us--; //Approximate extra overhead time.
|
||
|
|
us *= RCC_Clocks.HCLK_Frequency/1000000;
|
||
|
|
*SCB_DEMCR = *SCB_DEMCR | 0x01000000;
|
||
|
|
*DWT_CYCCNT = 0; // reset the counter
|
||
|
|
*DWT_CONTROL = *DWT_CONTROL | 1 ; // enable the counter
|
||
|
|
while( *DWT_CYCCNT < us );
|
||
|
|
}
|
||
|
|
|
||
|
|
void ConfigureLED()
|
||
|
|
{
|
||
|
|
GPIO_InitTypeDef GPIO_InitStructure;
|
||
|
|
|
||
|
|
/* Enable the GPIO_LED Clock */
|
||
|
|
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);
|
||
|
|
|
||
|
|
/* Configure the GPIO_LED pin */
|
||
|
|
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8; //| GPIO_Pin_15 (15 = CTS)
|
||
|
|
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
|
||
|
|
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
|
||
|
|
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
|
||
|
|
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
|
||
|
|
GPIO_Init(GPIOB, &GPIO_InitStructure);
|
||
|
|
}
|
||
|
|
|