/*
Set up I2C pins and clock slow/fast
rate400 true = 400KHz, false 100KHz
*/
void MasterI2C0Init(int rate400)
{
//I2CMasterEnable(I2C0_MASTER_BASE); // causes fault
//
// Enable the I2C and GPIO port B blocks as they are needed by this driver.
//
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_I2C0);
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
//
// Configure the I2C SCL and SDA pins for I2C operation.
//
GPIOPinTypeI2CSCL(GPIO_PORTB_BASE, GPIO_PIN_2);
GPIOPinTypeI2C(GPIO_PORTB_BASE, GPIO_PIN_3);
GPIOPinConfigure(GPIO_PB2_I2C0SCL);
GPIOPinConfigure(GPIO_PB3_I2C0SDA);
//
// Initialize the I2C master.
//
ROM_I2CMasterInitExpClk(I2C0_MASTER_BASE, SysCtlClockGet(), rate400);
// Register interrupt handler
// or we could just edit the startup.c file
//I2CIntRegister(I2C0_MASTER_BASE,I2C0IntHandler);
//
// Enable the I2C interrupt.
//
ROM_IntEnable(INT_I2C0); // already done via I2CIntRegister
//
// Enable the I2C master interrupt.
//
ROM_I2CMasterIntEnable(I2C0_MASTER_BASE);
}
void i2cman_init()
{
//Enable I2C0 which by default uses PortB[3:2] for SDA and SCL respectively
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
SysCtlPeripheralEnable(SYSCTL_PERIPH_I2C0);
SysCtlPeripheralReset(SYSCTL_PERIPH_I2C0);
GPIOPinConfigure(GPIO_PB2_I2C0SCL);
GPIOPinConfigure(GPIO_PB3_I2C0SDA);
GPIOPinTypeI2CSCL(GPIO_PORTB_BASE, GPIO_PIN_2);
GPIOPinTypeI2C(GPIO_PORTB_BASE, GPIO_PIN_3);
I2CMasterInitExpClk(I2C_PORT, SysCtlClockGet(), false);
I2CMasterGlitchFilterConfigSet(I2C_PORT, I2C_MASTER_GLITCH_FILTER_32);
ROM_I2CMasterIntEnable(I2C_PORT);
IntEnable(INT_I2C0);
}
