int i2c_read(i2c_t *obj, int address, char *data, int length, int stop) {
I2C_Type *base = i2c_addrs[obj->instance];
i2c_master_transfer_t master_xfer;
i2c_address = address >> 1;
memset(&master_xfer, 0, sizeof(master_xfer));
master_xfer.slaveAddress = address >> 1;
master_xfer.direction = kI2C_Read;
master_xfer.data = (uint8_t *)data;
master_xfer.dataSize = length;
if (obj->next_repeated_start) {
master_xfer.flags |= kI2C_TransferRepeatedStartFlag;
}
if (!stop) {
master_xfer.flags |= kI2C_TransferNoStopFlag;
}
obj->next_repeated_start = master_xfer.flags & kI2C_TransferNoStopFlag ? 1 : 0;
/* The below function will issue a STOP signal at the end of the transfer.
* This is required by the hardware in order to receive the last byte
*/
if (I2C_MasterTransferBlocking(base, &master_xfer) != kStatus_Success) {
return I2C_ERROR_NO_SLAVE;
}
return length;
}
static status_t I2C_READ(uint8_t *pBuff, uint16_t buffLen)
{
masterXfer.direction = kI2C_Read;
masterXfer.data = pBuff;
masterXfer.dataSize = buffLen;
return I2C_MasterTransferBlocking(NXPNCI_I2C_INSTANCE, &masterXfer);
}
void LedDriver_WriteBuffer(uint8_t i2cAddress, uint8_t buffer[], uint8_t size)
{
i2c_master_transfer_t masterXfer;
masterXfer.slaveAddress = i2cAddress;
masterXfer.direction = kI2C_Write;
masterXfer.subaddress = 0;
masterXfer.subaddressSize = 0;
masterXfer.data = buffer;
masterXfer.dataSize = size;
masterXfer.flags = kI2C_TransferDefaultFlag;
I2C_MasterTransferBlocking(I2C_MAIN_BUS_BASEADDR, &masterXfer);
}
int i2c_byte_read(i2c_t *obj, int last) {
uint8_t data;
I2C_Type *base = i2c_addrs[obj->instance];
i2c_master_transfer_t master_xfer;
memset(&master_xfer, 0, sizeof(master_xfer));
master_xfer.slaveAddress = i2c_address;
master_xfer.direction = kI2C_Read;
master_xfer.data = &data;
master_xfer.dataSize = 1;
/* The below function will issue a STOP signal at the end of the transfer.
* This is required by the hardware in order to receive the last byte
*/
if (I2C_MasterTransferBlocking(base, &master_xfer) != kStatus_Success) {
return I2C_ERROR_NO_SLAVE;
}
return data;
}
void send_cmd(uint8_t *cmd, size_t size) {
i2c_master_transfer_t transfer;
memset(&transfer, 0, sizeof(transfer));
transfer.slaveAddress = max;
transfer.direction = kI2C_Write;
transfer.subaddress = 0;
transfer.subaddressSize = 0;
transfer.data = cmd;
transfer.dataSize = size;
transfer.flags = kI2C_TransferDefaultFlag;
status_t status = I2C_MasterTransferBlocking(i2c_config_default.i2c, &transfer);
#ifndef NDEBUG
if (status != kStatus_Success) {
PRINTF("I2C write(%02d) <= %02x\r\n", 0, &cmd);
i2c_error("write reg", status);
}
#endif
}
status_t BOARD_I2C_Receive(I2C_Type *base,
uint8_t deviceAddress,
uint32_t subAddress,
uint8_t subaddressSize,
uint8_t *rxBuff,
uint8_t rxBuffSize)
{
i2c_master_transfer_t masterXfer;
/* Prepare transfer structure. */
masterXfer.slaveAddress = deviceAddress;
masterXfer.subaddress = subAddress;
masterXfer.subaddressSize = subaddressSize;
masterXfer.data = rxBuff;
masterXfer.dataSize = rxBuffSize;
masterXfer.direction = kI2C_Read;
masterXfer.flags = kI2C_TransferDefaultFlag;
return I2C_MasterTransferBlocking(base, &masterXfer);
}
int i2c_write(i2c_t *obj, int address, const char *data, int length, int stop) {
I2C_Type *base = i2c_addrs[obj->instance];
i2c_master_transfer_t master_xfer;
memset(&master_xfer, 0, sizeof(master_xfer));
master_xfer.slaveAddress = address >> 1;
master_xfer.direction = kI2C_Write;
master_xfer.data = (uint8_t *)data;
master_xfer.dataSize = length;
if (obj->next_repeated_start) {
master_xfer.flags |= kI2C_TransferRepeatedStartFlag;
}
if (!stop) {
master_xfer.flags |= kI2C_TransferNoStopFlag;
}
obj->next_repeated_start = master_xfer.flags & kI2C_TransferNoStopFlag ? 1 : 0;
if (I2C_MasterTransferBlocking(base, &master_xfer) != kStatus_Success) {
return I2C_ERROR_NO_SLAVE;
}
return length;
}
