write()

Result< Transaction > fl::spi::ParallelDevice::write	(	const u8 *	data,
		size_t	size )

Write data (single stream drives all pins via LUT)

Parameters

data	Data to transmit
size	Number of bytes

Returns

Result containing Transaction handle or error

Note

Each byte value is mapped via LUT to GPIO pin states

Definition at line 235 of file parallel_device.cpp.hpp.

                                                                     {
    if (!isReady()) {
        return Result<Transaction>::failure(SPIError::NOT_INITIALIZED,
            "Device not initialized");
    }
 
    if (!data || size == 0) {
        return Result<Transaction>::failure(SPIError::ALLOCATION_FAILED,
            "Invalid data or size");
    }
 
    // Write implementation depends on backend type
    // For now, return not implemented
    return Result<Transaction>::failure(SPIError::NOT_SUPPORTED,
        "ParallelDevice::write() not yet implemented");
}

References fl::expected< T, E >::failure(), and isReady().

Referenced by operator=().

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