WMPRO, WMMINI FW >= 1.0 WMMEGA FW >= 2.0
Write a byte to the SPI bus
$byte: An integer byte value to write to the SPI bus (0-255)
None
spi_clearcs() - Clear the CS output of the SPI bus
spi_read() - Read a byte from the SPI bus
spi_setcs() - Set the CS output of the SPI bus