uint8_t TwoWire::endTransmission(uint8_t sendStop)
{
uint8_t error = I2C_MASTER_ERR_NONE;
if(TX_BUFFER_EMPTY) return 0;
MAP_I2CMasterSlaveAddrSet(I2C_BASE, txAddress, false);
MAP_I2CMasterDataPut(I2C_BASE, txBuffer[txReadIndex]);
I2CTransact(I2C_MASTER_CMD_BURST_SEND_START);
txReadIndex = (txReadIndex + 1) % BUFFER_LENGTH;
while(!TX_BUFFER_EMPTY) {
MAP_I2CMasterDataPut(I2C_BASE, txBuffer[txReadIndex]);
I2CTransact(I2C_MASTER_CMD_BURST_SEND_CONT);
txReadIndex = (txReadIndex + 1) % BUFFER_LENGTH;
}
if(sendStop) {
I2CTransact(I2C_MASTER_CMD_BURST_SEND_STOP);
} else {
currentState = MASTER_TX;
}
/* Indicate that we are done transmitting */
transmitting = 0;
return error;
}
unsigned long I2CBufferWrite(unsigned char ucDevAddr, unsigned char *ucBuffer,
unsigned long ulSize,unsigned char ucFlags)
{
unsigned long ulNdx;
// Set I2C codec slave address
MAP_I2CMasterSlaveAddrSet(I2CA0_BASE,ucDevAddr, false);
// Write the first byte to the controller.
MAP_I2CMasterDataPut(I2CA0_BASE,ucBuffer[0]);
MAP_I2CMasterIntClearEx(I2CA0_BASE, I2C_INT_MASTER);
if( ulSize == 1)
{
MAP_I2CMasterControl(I2CA0_BASE, I2C_MASTER_CMD_SINGLE_SEND);
}
else
{
// Continue the transfer.
MAP_I2CMasterControl(I2CA0_BASE, I2C_MASTER_CMD_BURST_SEND_START);
// Wait until the current byte has been transferred.
while((MAP_I2CMasterIntStatusEx(I2CA0_BASE, false) & I2C_INT_MASTER) == 0)
{
}
for(ulNdx=1; ulNdx < ulSize-1; ulNdx++)
{
// Write the next byte to the controller.
MAP_I2CMasterDataPut(I2CA0_BASE,ucBuffer[ulNdx]);
// Clear Master Interrupt
MAP_I2CMasterIntClearEx(I2CA0_BASE, I2C_INT_MASTER);
// Continue the transfer.
MAP_I2CMasterControl(I2CA0_BASE, I2C_MASTER_CMD_BURST_SEND_CONT);
// Wait until the current byte has been transferred.
while((MAP_I2CMasterIntStatusEx(I2CA0_BASE, false) & I2C_INT_MASTER) == 0)
{
}
}
// Write the last byte to the controller.
MAP_I2CMasterDataPut(I2CA0_BASE, ucBuffer[ulSize-1]);
MAP_I2CMasterIntClearEx(I2CA0_BASE, I2C_INT_MASTER);
// End the transfer.
MAP_I2CMasterControl(I2CA0_BASE,I2C_MASTER_CMD_BURST_SEND_FINISH);
}
// Wait until the current byte has been transferred.
while((MAP_I2CMasterIntStatusEx(I2CA0_BASE, false) & I2C_INT_MASTER) == 0)
{
}
return 0;
}
void I2C_WriteMultiBegin(unsigned char slaveAddress, unsigned char address, unsigned char data)
{
MAP_I2CMasterSlaveAddrSet(I2CBase, slaveAddress, false);
MAP_I2CMasterDataPut(I2CBase, address);
MAP_I2CMasterControl(I2CBase, I2C_MASTER_CMD_BURST_SEND_START);
I2C_WaitForBus(I2C_MASTER_CMD_BURST_SEND_ERROR_STOP);
MAP_I2CMasterDataPut(I2CBase, data);
MAP_I2CMasterControl(I2CBase, I2C_MASTER_CMD_BURST_SEND_CONT);
I2C_WaitForBus(I2C_MASTER_CMD_BURST_SEND_ERROR_STOP);
}
void I2C_WriteMultiEnd(unsigned char data)
{
MAP_I2CMasterDataPut(I2CBase, data);
MAP_I2CMasterControl(I2CBase, I2C_MASTER_CMD_BURST_SEND_FINISH);
I2C_WaitForBus(I2C_MASTER_CMD_BURST_SEND_ERROR_STOP);
}
void ti_arm_mcu_i2c_reg_write(int port, unsigned char addr, unsigned char reg,
const unsigned char *data, int len)
{
const ti_arm_mcu_i2c_t *i2c = &ti_arm_mcu_i2cs[port];
MAP_I2CMasterSlaveAddrSet(i2c->base, addr >> 1, 0);
MAP_I2CMasterDataPut(i2c->base, reg);
MAP_I2CMasterControl(i2c->base, I2C_MASTER_CMD_BURST_SEND_START);
wait_for_completion(i2c->base);
while (len--)
{
MAP_I2CMasterDataPut(i2c->base, *data++);
if (len)
{
MAP_I2CMasterControl(i2c->base, I2C_MASTER_CMD_BURST_SEND_CONT);
wait_for_completion(i2c->base);
}
}
MAP_I2CMasterControl(i2c->base, I2C_MASTER_CMD_BURST_SEND_FINISH);
wait_for_completion(i2c->base);
}
unsigned long I2C_ReadMultiBegin(unsigned char slaveAddress, unsigned char address)
{
unsigned char data;
MAP_I2CMasterSlaveAddrSet(I2CBase, slaveAddress, false);
MAP_I2CMasterDataPut(I2CBase, address);
MAP_I2CMasterControl(I2CBase, I2C_MASTER_CMD_BURST_SEND_START);
I2C_WaitForBus(I2C_MASTER_CMD_BURST_SEND_ERROR_STOP);
MAP_I2CMasterSlaveAddrSet(I2CBase, slaveAddress, true);
MAP_I2CMasterControl(I2CBase, I2C_MASTER_CMD_BURST_RECEIVE_START);
I2C_WaitForBus(I2C_MASTER_CMD_BURST_RECEIVE_ERROR_STOP);
data = MAP_I2CMasterDataGet(I2CBase);
return data;
}
