/*
* Initiate the Wire library and join the I2C bus as a slave. This should normally be called only once.
* Parameters: address: the 7-bit slave address (optional);
*/
void WireClass::begin(uint8_t address){
// Init the I2C as slave
//xI2CSlaveInit(i2cPort, address, xI2C_GENERAL_CALL_EN); //mcy
xI2CSlaveEnable(i2cPort);
xI2CIntCallbackInit(i2cPort, WireClass::I2CCallbackFunc);
xI2CSlaveIntEnable(i2cPort, xI2C_SLAVE_INT_DATA | xI2C_MASTER_INT_DATA);
xIntEnable(xSysCtlPeripheraIntNumGet(i2cPort));
}
//*****************************************************************************
//
//! The main function of the i2c slave receive with poll mode
//
//! return none
//
//*****************************************************************************
void SlaveReceivePoll(void)
{
//
// Congigure the i2c pin
//
xSPinTypeI2C(I2C0SCK, PA11);
xSPinTypeI2C(I2C0DATA, PA10);
//
// Enable the i2c peripheral
//
xSysCtlPeripheralEnable(xSYSCTL_PERIPH_I2C0);
//
// Init the I2C as slave
//
I2CSlaveInit(I2C0_BASE, SlaveAddress, I2C_GENERAL_CALL_DIS);
//
// Install the i2c0 interrupt service function
//
// I2CIntCallbackInit(I2C0_BASE, ( xtEventCallback)SlavaRecvFunc);
WriteBuf[8] = '\0';
//
// I2C master transfer config
//
I2CSlaveRcCfg.pvWBuf = WriteBuf;
I2CSlaveRcCfg.ulWLen = WriteLength;
I2CSlaveRcCfg.ulWCount = 0;
I2CSlaveRcCfg.pvRBuf = ReceiveBuf;
I2CSlaveRcCfg.ulRLen = ReceiveLength;
//I2CSlaveRcCfg.pvRBuf = 0;
//I2CSlaveRcCfg.ulRLen = 0;
I2CSlaveRcCfg.ulRCount = 0;
//
// UART initialize
//
UART0Configuration();
xI2CIntCallbackInit(I2C0_BASE, SlavaRecvFunc);
//
// I2C salve receive wiht pollint mode
//
I2CSlaveTransfer(I2C0_BASE, &I2CSlaveRcCfg, I2C_TRANSFER_POLLING);
//
// Print the receive data form the master
//
while(1)
{
}
}
//*****************************************************************************
//
//! The function is to set the i2c slave receive with poll mode
//
//! return none
//
//*****************************************************************************
void SlaveReceivePoll(void)
{
//
// Set system clock
//
xSysCtlClockSet(12000000, xSYSCTL_XTAL_12MHZ | xSYSCTL_OSC_MAIN);
//
// Congigure the i2c pin
//
xSPinTypeI2C(I2C0SCK, PD5);
xSPinTypeI2C(I2C0SDA, PD4);
//
// Enable the i2c peripheral
//
xSysCtlPeripheralEnable(xSYSCTL_PERIPH_I2C0);
//
// Init the I2C as slave
//
xI2CSlaveInit(I2C0_BASE, SlaveAddress, I2C_GENERAL_CALL_DIS);
WriteBuf[8] = '\0';
//
// I2C master transfer config
//
I2CSlaveRcCfg.pvWBuf = WriteBuf;
I2CSlaveRcCfg.ulWLen = WriteLength;
I2CSlaveRcCfg.ulWCount = 0;
I2CSlaveRcCfg.pvRBuf = ReceiveBuf;
I2CSlaveRcCfg.ulRLen = ReceiveLength;
I2CSlaveRcCfg.ulRCount = 0;
xI2CIntCallbackInit(I2C0_BASE, SlavaRecvFunc);
//
// I2C salve receive wiht polling mode
//
xI2CSlaveTransfer(I2C0_BASE, &I2CSlaveRcCfg, xI2C_TRANSFER_POLLING);
}
//*****************************************************************************
//
//! The main function of the i2c slave receive with poll mode
//
//! return none
//
//*****************************************************************************
void SlaveReceivePoll(void)
{
//
//Set the external 12MHZ clock as system clock
//
SysCtlKeyAddrUnlock();
xHWREG(SYSCLK_PWRCON) |= SYSCLK_PWRCON_XTL12M_EN;
//
// Congigure the i2c pin
//
// XPinTypeI2C(I2C0SCL, PA9);
// XPinTypeI2C(I2C0DATA, PA8);
GPIOPinFunctionSet(GPIO_FUNCTION_I2C , GPIO_PORTA_BASE , GPIO_PIN_9);
GPIOPinFunctionSet(GPIO_FUNCTION_I2C , GPIO_PORTA_BASE , GPIO_PIN_8);
//
// Enable the i2c peripheral
//
xSysCtlPeripheralEnable(xSYSCTL_PERIPH_I2C0);
//
// Init the I2C as slave
//
I2CSlaveInit(I2C0_BASE, SlaveAddress, I2C_GENERAL_CALL_DIS);
//
// Install the i2c0 interrupt service function
//
// I2CIntCallbackInit(I2C0_BASE, ( xtEventCallback)SlavaRecvFunc);
WriteBuf[8] = '\0';
//
// I2C master transfer config
//
I2CSlaveRcCfg.pvWBuf = WriteBuf;
I2CSlaveRcCfg.ulWLen = WriteLength;
I2CSlaveRcCfg.ulWCount = 0;
I2CSlaveRcCfg.pvRBuf = ReceiveBuf;
I2CSlaveRcCfg.ulRLen = ReceiveLength;
//I2CSlaveRcCfg.pvRBuf = 0;
//I2CSlaveRcCfg.ulRLen = 0;
I2CSlaveRcCfg.ulRCount = 0;
//
// UART initialize
//
UART0Configuration();
xI2CIntCallbackInit(I2C0_BASE, SlavaRecvFunc);
//
// I2C salve receive wiht pollint mode
//
I2CSlaveTransfer(I2C0_BASE, &I2CSlaveRcCfg, I2C_TRANSFER_POLLING);
//
// Print the receive data form the master
//
while(1)
{
}
}