STM32 IO 模拟IIC I2C

#define I2C_Speed        100000#define I2C_EE             I2C1#define uStatus0x80#definedTime 5#define I2C_EE_GPIO   GPIOB#define I2C_EE_SCL         GPIO_Pin_5#define I2C_EE_SDA         GPIO_Pin_4#define I2C_EE_CLK         RCC_APB1Periph_I2C1#define SCL_H         GPIOB->BSRR = GPIO_Pin_5#define SCL_L         GPIOB->BRR  = GPIO_Pin_5#define SDA_H         GPIOB->BSRR = GPIO_Pin_4#define SDA_L         GPIOB->BRR  = GPIO_Pin_4#define SCL_read      GPIOB->IDR  & GPIO_Pin_5#define SDA_read      GPIOB->IDR  & GPIO_Pin_4 static unsigned int cntForInitial = 0;static unsigned char fSigStatus = 0;//static bool LedStatus = true;void I2C_Init(){ GPIO_InitTypeDef  GPIO_InitStructure;    //* Configure I2C_EE pins: SCL and SDA  GPIO_InitStructure.GPIO_Pin =  I2C_EE_SCL | I2C_EE_SDA;  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //GPIO_Speed_50MHz;  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD;  GPIO_Init(I2C_EE_GPIO, &GPIO_InitStructure);}static void i2c_start(){ SDA_H; SCL_H; DelayUs(dTime); SDA_L; DelayUs(dTime); SCL_L; DelayUs(dTime); //LedStatus = !LedStatus; //f_LCT1(LedStatus);}/*******************************************************************Fuction:Stop i2c*******************************************************************/static void i2c_stop(){    SDA_L; SCL_H; DelayUs(dTime); SDA_H; DelayUs(dTime); SCL_H; DelayUs(dTime);}/*******************************************************************Fuction:i2c  Master wait for ackOnly ack*******************************************************************/static unsigned char i2c_rd_ack(){    unsigned char flag = 0;    SDA_H; SCL_H; DelayUs(dTime/2); flag = SDA_read; DelayUs(dTime/2); SCL_L; DelayUs(dTime/2); if(flag == 1) return 0; return 1;}/*******************************************************************Fuction:i2c  Byte transmissionOnly Send,no ack,no stop*******************************************************************/static unsigned char i2c_sb(unsigned char Byte){unsigned char cnt;SCL_L;for(cnt=0;cnt<8;cnt++) {  if(Byte&0x80)   SDA_H;   else   SDA_L;   DelayUs(dTime);   SCL_H;   DelayUs(dTime);   SCL_L;   Byte <<= 1;   DelayUs(dTime); } return i2c_rd_ack();}/*******************************************************************Fuction:i2c Byte receiveReturn Byte*******************************************************************/static unsigned char i2c_rb(){unsigned char cnt;unsigned char Byte=0;SDA_H;    for(cnt=0;cnt<8;++cnt)      { Byte <<= 1; DelayUs(dTime); SCL_H; DelayUs(dTime); if(SDA_read) Byte |= 0x01; SCL_L; DelayUs(dTime);      }    return Byte;}/*******************************************************************Fuction:i2c ACK  Master send*******************************************************************/static void i2c_wr_ack(unsigned char ACK){  if(ACK)SDA_H;elseSDA_L; SCL_H; DelayUs(dTime); SCL_L; DelayUs(dTime);}/*******************************************************************Fuction:i2c Byte receiveReturn Byte*******************************************************************/uint8_t ReadReg(unsigned int addr){    uint8_t temp;i2c_start();if(!i2c_sb(BRG_DEV_ADDR)){i2c_stop();return 0;}if(!i2c_sb((uint8_t)(addr >> 8))){i2c_stop();return 0;}if(!i2c_sb((uint8_t)(addr & 0xFF))){i2c_stop();return 0;}i2c_start();if(!i2c_sb(BRG_DEV_ADDR |0x01)){i2c_stop();return 0;}temp = i2c_rb();i2c_wr_ack(1);i2c_stop();return temp;}unsigned char WriteReg8(unsigned int addr,unsigned char wData){i2c_start();if(!i2c_sb(BRG_DEV_ADDR)){i2c_stop();return 0;}if(!i2c_sb((unsigned char)(addr >> 8))){i2c_stop();return 0;}if(!i2c_sb((unsigned char)(addr & 0xFF))){i2c_stop();return 0;}if(!i2c_sb((unsigned char)(wData))){i2c_stop();return 0;}i2c_stop();//DelayUs(1);return 1;}unsigned char WriteReg16(unsigned int addr,unsigned char wData1,unsigned char wData2){i2c_start();if(!i2c_sb(BRG_DEV_ADDR)){i2c_stop();return 0;}if(!i2c_sb((unsigned char)(addr >> 8))){i2c_stop();return 0;}if(!i2c_sb((unsigned char)(addr & 0xFF))){i2c_stop();return 0;}if(!i2c_sb((unsigned char)(wData2))){i2c_stop();return 0;}if(!i2c_sb((unsigned char)(wData1))){i2c_stop();return 0;}i2c_stop();DelayUs(1);return 1;}unsigned char WriteReg32(unsigned int addr,unsigned char wData1,unsigned char wData2,unsigned char wData3,unsigned char wData4){i2c_start();if(!i2c_sb(BRG_DEV_ADDR)){i2c_stop();return 0;}if(!i2c_sb((unsigned char)(addr >> 8))){i2c_stop();return 0;}if(!i2c_sb((unsigned char)(addr & 0xFF))){i2c_stop();return 0;}if(!i2c_sb((unsigned char)(wData4))){i2c_stop();return 0;}if(!i2c_sb((unsigned char)(wData3))){i2c_stop();return 0;}if(!i2c_sb((unsigned char)(wData2))){i2c_stop();return 0;}if(!i2c_sb((unsigned char)(wData1))){i2c_stop();return 0;}i2c_stop();DelayUs(1);return 1;}