165 lines
2.1 KiB
C
165 lines
2.1 KiB
C
|
|
#include "SoftI2C.h"
|
|
|
|
|
|
#include "stm32f4xx_hal.h"
|
|
|
|
|
|
|
|
void Soft_I2C_Init()
|
|
{
|
|
|
|
}
|
|
|
|
void Soft_I2C_Transmit(uint8_t address, uint8_t* databuffer,uint8_t bufferlength)
|
|
{
|
|
uint8_t nack = 0;
|
|
|
|
setSDCLK(); //Generate Start Condition
|
|
bitwait();
|
|
setSDA(0);
|
|
bitwait();
|
|
|
|
for(int i = 0; i < 8; i++) //Write I2C-Slave Address
|
|
{
|
|
setSDA((address>>(7-i) & 0x01));
|
|
bitwait();
|
|
resetSDCLK();
|
|
bitwait();
|
|
setSDCLK();
|
|
bitwait();
|
|
}
|
|
|
|
SDA_ReadMode();
|
|
resetSDCLK();
|
|
bitwait();
|
|
nack += readSDA();
|
|
bitwait();
|
|
SDA_WriteMode();
|
|
setSDA(0);
|
|
setSDCLK();
|
|
bitwait();
|
|
|
|
|
|
for(int n = 0; n<bufferlength;n++) //Write Data
|
|
{
|
|
|
|
for(int i = 0; i < 8; i++)
|
|
{
|
|
setSDA((databuffer[n]>>(7-i) & 0x01));
|
|
bitwait();
|
|
resetSDCLK();
|
|
bitwait();
|
|
setSDCLK();
|
|
bitwait();
|
|
}
|
|
|
|
SDA_ReadMode();
|
|
resetSDCLK();
|
|
bitwait();
|
|
nack += readSDA();
|
|
bitwait();
|
|
SDA_WriteMode();
|
|
setSDA(0);
|
|
setSDCLK();
|
|
bitwait();
|
|
}
|
|
|
|
resetSDCLK(); //Generate Stop Condition
|
|
bitwait();
|
|
setSDA(1);
|
|
bitwait();
|
|
|
|
|
|
}
|
|
|
|
void Soft_I2C_Receive(uint8_t address, uint8_t* databuffer, uint8_t bufferlength)
|
|
{
|
|
uint8_t nack = 0;
|
|
|
|
setSDCLK(); //Generate Start Condition
|
|
bitwait();
|
|
setSDA(0);
|
|
bitwait();
|
|
|
|
for(int i = 0; i < 8; i++) //Write I2C-Slave Address
|
|
{
|
|
setSDA((address>>(7-i) & 0x01));
|
|
bitwait();
|
|
resetSDCLK();
|
|
bitwait();
|
|
setSDCLK();
|
|
bitwait();
|
|
}
|
|
|
|
SDA_ReadMode();
|
|
resetSDCLK();
|
|
bitwait();
|
|
nack += readSDA();
|
|
bitwait();
|
|
|
|
|
|
for(int n = 0; n<bufferlength;n++)
|
|
{
|
|
databuffer[n] = 0;
|
|
for(int i = 0; i < 8; i++)
|
|
{
|
|
setSDCLK();
|
|
bitwait();
|
|
resetSDCLK();
|
|
bitwait();
|
|
databuffer[n] |= readSDA()<<(7-i);
|
|
bitwait();
|
|
}
|
|
|
|
setSDCLK();
|
|
bitwait();
|
|
|
|
SDA_WriteMode();
|
|
setSDA(0);
|
|
bitwait();
|
|
resetSDCLK();
|
|
bitwait();
|
|
SDA_ReadMode();
|
|
}
|
|
|
|
resetSDCLK(); //Generate Stop Condition
|
|
bitwait();
|
|
setSDA(1);
|
|
bitwait();
|
|
|
|
}
|
|
|
|
void SDA_WriteMode()
|
|
{
|
|
|
|
}
|
|
|
|
void SDA_ReadMode()
|
|
{
|
|
|
|
}
|
|
|
|
void setSDA(uint8_t state)
|
|
{
|
|
|
|
}
|
|
|
|
uint8_t readSDA()
|
|
{
|
|
|
|
}
|
|
|
|
void bitwait()
|
|
{
|
|
|
|
}
|
|
void setSDCLK()
|
|
{
|
|
|
|
}
|
|
void resetSDCLK()
|
|
{
|
|
|
|
}
|