void i2cStop()
{
SetLowSCL();
SetLowSDA();
SetHighSCL();
SetLowSDA();
SetHighSCL();
SetHighSDA();
}
void CI2C::Stop()
{
SetLowSCL();
SetLowSDA();
SetHighSCL();
SetLowSDA();
SetHighSCL();
SetHighSDA();
}
u8 i2cRead(u8 ack)
{
u8 i;
u8 caracter = 0x00;
SetLowSCL();
SetHighSDA();
for (i=0; i<8; i++)
{
caracter = caracter << 1;
SetHighSCL();
if (I2C_GPIO->IDR&(1<<SDA))
caracter = caracter + 1;
SetLowSCL();
}
if (ack)
{
SetLowSDA();
}
SetHighSCL();
SetLowSCL();
i2c_delay();
return (caracter);
}
int i2cWrite(u8 a)
{
u8 i;
u8 return_ack;
for (i=0; i<8; i++)
{
SetLowSCL();
if (a & 0x80)
SetHighSDA();
else
SetLowSDA();
SetHighSCL();
a <<= 1;
}
SetLowSCL();
SetHighSDA();
SetHighSCL();
if (I2C_GPIO->IDR&(1<<SDA))
return_ack = NO_I2C_ACK;
else
return_ack = OK_I2C_ACK;
SetLowSCL();
i2c_delay();
return(return_ack);
}
int CI2C::Write(uint8_t a)
{
uint8_t i;
uint8_t return_ack;
for (i=0; i<8; i++)
{
SetLowSCL();
if (a & 0x80)
SetHighSDA();
else
SetLowSDA();
SetHighSCL();
a <<= 1;
}
SetLowSCL();
SetHighSDA();
SetHighSCL();
if (I2C_GPIO->IDR&(1<<SDA))
return_ack = NO_I2C_ACK;
else
return_ack = OK_I2C_ACK;
SetLowSCL();
delay();
return(return_ack);
}
void i2cStart()
{
SetHighSCL();
SetHighSDA();
SetHighSCL();
SetLowSDA();
SetLowSCL();
SetHighSDA();
}
uint8_t CI2C::Read(uint8_t ack)
{
uint8_t i;
uint8_t c = 0x00;
SetLowSCL();
for (i = 0; i < 8; i++)
{
c = c << 1;
SetHighSCL();
if (I2C_GPIO->IDR&(1<<SDA))
c = c | 0x01;
SetLowSCL();
}
if(ack)
{
SetLowSDA();
}
else
{
SetHighSDA();
}
SetHighSCL();
SetLowSCL();
SetHighSDA();
/*
if (ack > 0)
{
//0
SetLowSDA();
SetHighSCL();
SetLowSCL();
// SetHighSDA();
}
else
{
//1
SetHighSDA();
SetHighSCL();
SetLowSCL();
// SetLowSDA();
}
*/
return (c);
}
void i2c_0_init()
{
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIO_I2C, ENABLE);
GPIO_InitTypeDef GPIO_InitStruct;
GPIO_InitStruct.GPIO_Pin = (1<<SDA)|(1<<SCL);
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;//this sets the GPIO modules clock speed
GPIO_InitStruct.GPIO_OType = GPIO_OType_OD; // this sets the pin type to open drain
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL; // this disables resistor
GPIO_Init(I2C_GPIO, &GPIO_InitStruct);
SetHighSCL();
SetLowSDA();
SetHighSDA();
}
