/* Setup I2C handle and parameters */
static void setupI2CMaster()
{
/* Enable I2C clock and reset I2C peripheral - the boot ROM does not
do this */
Chip_I2C_Init(LPC_I2C);
/* Perform a sanity check on the storage allocation */
if (LPC_I2CD_API->i2c_get_mem_size() > sizeof(i2cMasterHandleMEM)) {
/* Example only: this should never happen and probably isn't needed for
most I2C code. */
errorI2C();
}
/* Setup the I2C handle */
i2cHandleMaster = LPC_I2CD_API->i2c_setup(LPC_I2C_BASE,
i2cMasterHandleMEM);
if (i2cHandleMaster == NULL) {
errorI2C();
}
/* Set I2C bitrate */
if (LPC_I2CD_API->i2c_set_bitrate(i2cHandleMaster,
Chip_Clock_GetSystemClockRate(), I2C_BITRATE) != LPC_OK) {
errorI2C();
}
}
/* Setup I2C handle and parameters */
static void setupI2CSlave()
{
ErrorCode_t error_code;
/* Enable I2C clock and reset I2C peripheral - the boot ROM does not
do this */
Chip_I2C_Init();
/* Perform a sanity check on the storage allocation */
if (LPC_I2CD_API->i2c_get_mem_size() > sizeof(i2cSlaveHandleMEM)) {
/* Example only: this should never happen and probably isn't needed for
most I2C code. */
errorI2C();
}
/* Setup the I2C handle */
i2cHandleSlave = LPC_I2CD_API->i2c_setup(LPC_I2C_BASE, i2cSlaveHandleMEM);
if (i2cHandleSlave == NULL) {
errorI2C();
}
/* Set a single 7-bit I2C address, only 7-bit addressing is supported */
error_code = LPC_I2CD_API->i2c_set_slave_addr(i2cHandleSlave,
I2C_ADDR_7BIT, 0xFF);
if (error_code != LPC_OK) {
DEBUGOUT("Error setting I2C slave address\r\n");
errorI2C();
}
/* No need to set I2C clock rate in slave mode */
}
/* Master transmit in interrupt mode */
static void sendI2CMaster(uint16_t AddressI2C, bool ledStateOut,
uint8_t regAddr)
{
uint8_t SendData[10];
I2C_PARAM_T param;
I2C_RESULT_T result;
ErrorCode_t error_code;
int index = 0;
SendData[index++] = (uint8_t) AddressI2C;
SendData[index++] = (uint8_t) regAddr; /* I2C device regAddr */
SendData[index++] = (uint8_t) 0x00;
SendData[index++] = (uint8_t) ledValues[ledValue];
SendData[index++] = (uint8_t) displayNumber;
/* Setup I2C parameters for number of bytes with stop
- appears as follows on bus:
Start - address7 or address10upper - ack
(10 bits addressing only) address10lower - ack
value 1 - ack
value 2 - ack - stop */
param.num_bytes_send = index;
param.buffer_ptr_send = &SendData[0];
param.num_bytes_rec = 0;
param.stop_flag = 1;
param.func_pt = cbI2CComplete;
/* Set timeout (much) greater than the transfer length */
//LPC_I2CD_API->i2c_set_timeout(i2cHandleMaster, 100000);
/* Do master write transfer */
intErrCode = -1;
/* Function is non-blocking, returned error should
be LPC_OK, but isn't checked here */
error_code = LPC_I2CD_API->i2c_master_transmit_intr(i2cHandleMaster,
¶m, &result);
/* Sleep until transfer is complete, but allow IRQ to wake system
to handle I2C IRQ */
while (intErrCode == -1) {
__WFI();
}
/* Cast saved error code from callback */
error_code = (ErrorCode_t) intErrCode;
// /* Completed without erors? */
if (error_code != LPC_OK) {
/* Likely cause is NAK */
Print_Val("i2c_master_transmit error code : 0x", error_code);
errorI2C();
}
/* Note results are only valid when there are no errors */
}
/* Slave receive in interrupt mode */
static void readI2CSlave(void)
{
ErrorCode_t error_code;
/* Setup receive buffer, receive buffer size, and receive callback */
paramRX.num_bytes_rec = 2; /* Address and single byte */
paramRX.buffer_ptr_rec = &recvBuff[0];
paramRX.func_pt = cbRXI2CComplete;
/* Clear error code */
RXintErrCode = -1;
/* Function is non-blocking */
error_code = LPC_I2CD_API->i2c_slave_receive_intr(i2cHandleSlave, ¶mRX, &resultRX);
/* Completed without erors? */
if (error_code != LPC_OK) {
DEBUGOUT("i2c_slave_receive_intr error code : %x\r\b", error_code);
errorI2C();
}
}
/* Slave transmit in interrupt mode */
static void sendI2CSlave(void)
{
ErrorCode_t error_code;
/* Send 1 byte based on master request */
paramRX.num_bytes_rec = 1; /* Address byte */
paramRX.buffer_ptr_rec = &recvBuff[0];
paramTX.num_bytes_send = 1;
paramTX.buffer_ptr_send = &tranBuff[0];
paramTX.func_pt = cbTXI2CComplete;
/* Clear error code */
TXintErrCode = -1;
/* Function is non-blocking */
error_code = LPC_I2CD_API->i2c_slave_transmit_intr(i2cHandleSlave, ¶mTX, &resultTX);
/* Completed without erors? */
if (error_code != LPC_OK) {
DEBUGOUT("i2c_slave_transmit_intr error code : %x\r\b", error_code);
errorI2C();
}
}
