#include "platform.h"
+#include "stm32f4xx.h"
+//#include "stm322xg_eval.h"
+#include <stm32f4xx_gpio.h>
+#include <stm32f4xx_rcc.h>
+#include <stm32f4xx_rcc.h>
+//#include "stm32f4_discovery.h"
+
+
+void ioinit(){
+ GPIO_InitTypeDef GPIO_InitStructure;
+
+ /* GPIOD Periph clock enable */
+ RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE);
+
+ /* Configure PD12, PD13, PD14 and PD15 in output pushpull mode */
+ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12 | GPIO_Pin_13| GPIO_Pin_14| GPIO_Pin_15;
+ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
+ GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
+ GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
+ GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
+ GPIO_Init(GPIOD, &GPIO_InitStructure);
+}
+
+
+void ledon(){
+ //GPIOG->BSRRL=GPIO_Pin_14;
+ GPIO_ResetBits(GPIOD, GPIO_Pin_14);
+}
+void ledoff(){
+ //GPIOG->BSRRH=GPIO_Pin_14;
+ GPIO_SetBits(GPIOD, GPIO_Pin_14);
+}
+
//! Count the length of a string.
uint32_t strlen(const char *s){
//! Initialize the STM32F4xx ports and USB.
void stm32f4xx_init(){
-
+ ioinit();
+ while(1){
+ ledon();
+ delay(0x1000);
+ ledoff();
+ delay(0x1000);
+ }
}
//! Receive a byte.