void enableProgramMode( ) {
// drive reset high initially to stop flickering
drivePin( B, AVRISP_PIN_RESET, high );
output_init( B, AVRISP_PIN_RESET );
// initialize SPI
spiMaster_init( spiMaster_clockDiv64 );
// sink device into reset state
delay_ms( 50 );
drivePin( B, AVRISP_PIN_RESET, low );
// enter prog mode (manually to check)
spiMaster_transmit( 0xAC );
spiMaster_transmit( 0x53 );
spiMaster_transmit( 0x00 );
ubyte verify = spiMaster_receive( );
spiMaster_transmit( 0x00 );
if ( verify != 0x53 ) {
statusLed_red( );
uart_putc( AVRISP_RESP_UNKNOWN );
return;
}
LED_on( );
uart_putc( BYTE_CR ); // done!
}
static void spi_init( void )
{
spiMaster_init( &spiMaster, 0, PIN_SCLK, PIN_MOSI, PIN_MISO );
}
