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##

# 2.47.57 FLEXCOMx_TWI_Write Function

## C

    /* x = FLEXCOM instance number */

    /* TWI master mode */

    bool FLEXCOMx_TWI_Write(uint16_t address, uint8_t *pdata, size_t length)

## Summary

Writes data to the TWI slave

## Description

This function writes data to a TWI slave on the bus. The function will attempt to write length number of bytes from pdata buffer to a slave whose address is specified by address. The TWI Master will generate a Start condition, write the data and then generate a Stop Condition. If the slave NAKs the request or a bus error was encountered on the bus, the transfer is terminated. The application can call the FLEXCOMx_TWI_ErrorGet function to know the cause of the error. The function is non-blocking. It initiates bus activity and returns immediately. The transfer is then completed in the peripheral interrupt. A transfer request cannot be placed when another transfer is in progress. Calling the write function when another function is already in progress will cause the function to return false. If a callback was registered, the library will call the registered callback function when the transfer has completed.

## Precondition

FLEXCOMx_TWI_Initialize must have been called for the associated FLEXCOM TWI instance.

## Parameters

Param | Description
--- | ---
address | 7-bit / 10-bit slave address
data | pointer to source data buffer that contains the data to be transmitted
length | Number of bytes to write

## Returns

true - The request was placed successfully and the bus activity was initiated.

false - The request fails, if there was already a transfer in progress when this function was called.

## Example

    uint8_t myData [NUM_BYTES];

    if(!FLEXCOM0_TWI_Write( SLAVE_ADDR, &myData[0], NUM_BYTES ))
    {
        // error handling
    }

## Remarks

None