Hello everyone, I have problem with I2C communication from my Lounchpad TM4C123gxl to proximity sensor ADPS9960. I init MCU, peripheral, and when try to read from sensor register I get 0xFF, When I try to read from Arduino board to the same sensor, code works good. So I am apparently doing something wrong and I don't know what. I connected pullups in SCL and SDA line, (10k. )Here is my I2C code :
void main(void) {
SysCtlClockSet(SYSCTL_SYSDIV_1 | SYSCTL_USE_PLL | SYSCTL_OSC_INT | SYSCTL_XTAL_16MHZ);
Configuration();
while(1)
{
Read_Inputs();
}
}
void I2C_Configuration()
{
SysCtlPeripheralEnable(SYSCTL_PERIPH_I2C0);
SysCtlPeripheralReset(SYSCTL_PERIPH_I2C0);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
GPIOPinConfigure(GPIO_PB2_I2C0SCL);
GPIOPinConfigure(GPIO_PB3_I2C0SDA);
GPIOPinTypeI2CSCL(GPIO_PORTB_BASE, GPIO_PIN_2);
GPIOPinTypeI2C(GPIO_PORTB_BASE, GPIO_PIN_3);
I2CMasterInitExpClk(I2C0_BASE, SysCtlClockGet(), false);
HWREG(I2C0_BASE + I2C_O_FIFOCTL) = 80008000;
}
uint8_t I2CWriteDataByte(uint8_t slave_addr, uint8_t dev_reg, uint8_t data)
{
I2CMasterSlaveAddrSet(I2C0_BASE, slave_addr, false);
I2CMasterDataPut(I2C0_BASE, dev_reg);
I2CMasterControl(I2C0_BASE, I2C_MASTER_CMD_SINGLE_SEND);
while(I2CMasterBusy(I2C0_BASE));
I2CMasterDataPut(I2C0_BASE, data);
I2CMasterControl(I2C0_BASE, I2C_MASTER_CMD_BURST_SEND_FINISH);
while ( I2CMasterBusy(I2C0_BASE) );
return 1;
}
uint8_t I2CReadDataByte(uint8_t slave_addr, uint8_t slave_reg)
{
I2CMasterSlaveAddrSet(I2C0_BASE, slave_addr, false);
I2CMasterDataPut(I2C0_BASE, slave_reg);
I2CMasterControl(I2C0_BASE, I2C_MASTER_CMD_SINGLE_SEND);
while(I2CMasterBusy(I2C0_BASE));
I2CMasterSlaveAddrSet(I2C0_BASE, slave_addr, true);
I2CMasterControl(I2C0_BASE, I2C_MASTER_CMD_SINGLE_RECEIVE);
while(I2CMasterBusy(I2C0_BASE));
return(I2CMasterDataGet(I2C0_BASE));
}
