stm32f4-sdio/main.c

/*
 * main.c
 *
 *  Created on: Apr 25, 2015
 *      Author: mari
 */
#include <stm32f4xx.h>
#include <cmsis/arm_math.h>
#include <fatfs/ff.h>
#include <fatfs/diskio.h>
#include <uart/uart.h>
#include <stdio.h>
#include <stdint.h>

#define OUTPUT(pin)  (0x01 << (pin * 2))

FATFS SDfs;
FIL file;
DIR root;
volatile int w;
volatile uint32_t sdio_wait;

int initreq = 0xFF;

int main() {
	char buff[1024];
	char *name;
	FILINFO fno;
	char *write_string = "This is a write test. Okay... Writing seems to work. Let's close the file\n";

	RCC->AHB1ENR |= RCC_AHB1ENR_GPIOAEN;
	__DSB();
	GPIOA->MODER |= OUTPUT(6) | OUTPUT(7);
	GPIOA->ODR |= (1<<7);
	SysTick_Config(8*1680000);
	// f_mount(&SDfs, "0:/", 1);
	w = 0;
	initUART();
	setvbuf(stdout, NULL, _IONBF, 0);
	//while(w<10);
	initreq = f_mount(&SDfs, "0:/", 1);
	while(initreq);

	initreq = f_opendir(&root, "/");
	if (initreq == FR_OK) {
		if (!f_readdir(&root, &fno))
		{
			name = fno.fname;
			initreq = f_open(&file, name, FA_READ);
				if (initreq == FR_OK) {
					f_gets(buff, sizeof(buff), &file);
					printf("%s:\r\n%s\r\n",name, buff);
					f_close(&file);
				}

		}
	}

	initreq = f_open(&file, "foo.txt", FA_OPEN_APPEND | FA_WRITE);
	if (initreq == FR_OK) {
		initreq = f_write(&file, write_string, strlen(write_string), NULL);
		initreq = f_close(&file);
	}

//fflush(stdout);

while(1);


}


void HardFault_Handler(uint32_t *stack) {
//	  unsigned int stacked_r0;
//	  unsigned int stacked_r1;
//	  unsigned int stacked_r2;
//	  unsigned int stacked_r3;
//	  unsigned int stacked_r12;
//	  unsigned int stacked_lr;
//	  unsigned int stacked_pc;
//	  unsigned int stacked_psr;
//
//	  stacked_r0 =  stack[0];
//	  stacked_r1 =  stack[1];
//	  stacked_r2 =  stack[2];
//	  stacked_r3 =  stack[3];
//
//	  stacked_r12 =  stack[4];
//	  stacked_lr =  stack[5];
//	  stacked_pc =  stack[6];
//	  stacked_psr =  stack[7];
	GPIOA->MODER |= OUTPUT(6) | OUTPUT(7);
	GPIOA->ODR |= (1<<6) | (1<<7);
	while(1);
}

void SysTick_Handler()
{
	GPIOA->ODR ^= (1<<6)|(1<<7);
	w++;
	sdio_wait++;
}

void sdio_wait_ms(unsigned int i) {
	sdio_wait = 0;
	while(sdio_wait<i);

}