Texas Instruments MSP430

319
SDA_HIGH();
SCL_HIGH();
delay_us(4);
SDA_LOW();
delay_us(4);
SCL_LOW();
}
void SW_I2C_stop(void)
{
SDA_DIR_OUT();
SDA_LOW();
SCL_LOW();
delay_us(4);
SDA_HIGH();
SCL_HIGH();
delay_us(4);
}
unsigned char SW_I2C_read(unsigned char ack)
{
unsigned char i = 8;
unsigned char j = 0;
SDA_DIR_IN();
while(i > 0)
{
SCL_LOW();
delay_us(2);
SCL_HIGH();
delay_us(2);
j <<= 1;
if(SDA_IN() != 0x00)
{
j++;
}
delay_us(1);
i--;
};
switch(ack)
{
case I2C_ACK:
{
SW_I2C_ACK_NACK(I2C_ACK);;
break;
}
default:
{
SW_I2C_ACK_NACK(I2C_NACK);;
break;
}
}