#include "stm32f10x.h"
#include "stm32f10x_rcc.h"
#include "stm32f10x_gpio.h"
#include "stm32f10x_tim.h"
#include "stm32f10x_usart.h"

//----------------
#include "stm32f10x_i2c.h"

GPIO_InitTypeDef gpio;
I2C_InitTypeDef i2c;
#define TIMER_PRESCALER 720
#define EXT_TIM_PULSE 150
#define TIM_PULSE 50

uint16_t previousState;
GPIO_InitTypeDef port;
TIM_TimeBaseInitTypeDef timer;
TIM_OCInitTypeDef timerPWM;
uint16_t buttonPreviousState;
GPIO_InitTypeDef GPIO_InitStructure;
I2C_InitTypeDef I2C_InitStructure;
void I2C_init()
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO, ENABLE);

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
GPIO_Init(GPIOB, &GPIO_InitStructure);

RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);

I2C_StructInit(&I2C_InitStructure);
I2C_InitStructure.I2C_ClockSpeed = 100000;
I2C_InitStructure.I2C_OwnAddress1 = 1;
I2C_InitStructure.I2C_Ack = I2C_Ack_Disable;//Enable
I2C_Init(I2C1, &I2C_InitStructure);
I2C_Cmd(I2C1, ENABLE);
I2C_AcknowledgeConfig(I2C1, ENABLE);
}

void I2C_single_write(uint8_t HW_address, uint8_t addr, uint8_t data)
{
I2C_GenerateSTART(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C1, HW_address, I2C_Direction_Transmitter);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
I2C_SendData(I2C1, addr);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_SendData(I2C1, data);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_GenerateSTOP(I2C1, ENABLE);
while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY));
}

uint8_t I2C_single_read(uint8_t HW_address, uint8_t addr)
{
uint8_t data;
while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY));
I2C_GenerateSTART(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C1, HW_address, I2C_Direction_Transmitter);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
I2C_SendData(I2C1, addr);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_GenerateSTART(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C1, HW_address, I2C_Direction_Receiver);
while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_BYTE_RECEIVED));
data = I2C_ReceiveData(I2C1);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED));
I2C_AcknowledgeConfig(I2C1, DISABLE);
I2C_GenerateSTOP(I2C1, ENABLE);
while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY));
return data;
}

void delay(int a)
{
int i = 0;
int f = 0;
while(f < a)
{
while(i<60)
{i++;}
f++;
}
}

int main()
{
uint8_t single_data_read = 0;

I2C_init();
delay(500);
I2C_StretchClockCmd(I2C1, ENABLE);

I2C_single_write(0xA0, 0x00, 0x15);
delay(500);

single_data_read = I2C_single_read(0xA0, 0x03);

while(1);
}