/*
* Initialise the SPI interface to MASTER or SLAVE based on the stacking jumper
*
*/
void stacking_init(bool master)
{
if (master){
spi_slave_initialize();
} else {
spi_master_initialize();
}
return;
}
/**
* \brief Application entry point for SPI example.
*
* \return Unused (ANSI-C compatibility).
*/
int main(void)
{
uint8_t uc_key;
/* Initialize the SAM system. */
sysclk_init();
board_init();
/* Initialize the console UART. */
configure_console();
/* Output example information. */
puts(STRING_HEADER);
/* Configure SPI interrupts for slave only. */
NVIC_ClearPendingIRQ(SPI_IRQn);
NVIC_DisableIRQ(SPI_IRQn);
NVIC_SetPriority(SPI_IRQn, 0);
NVIC_EnableIRQ(SPI_IRQn);
spi_slave_initialize();
spi_xdmac_configure(SPI0);
/* Display menu. */
display_menu();
while (1) {
scanf("%c", (char *)&uc_key);
switch (uc_key) {
case 'h':
display_menu();
break;
case 't':
spi_disable_xdmac();
NVIC_ClearPendingIRQ(SPI_IRQn);
NVIC_DisableIRQ(SPI_IRQn);
NVIC_SetPriority(SPI_IRQn, 0);
NVIC_EnableIRQ(SPI_IRQn);
spi_master_go();
break;
default:
/* Set configuration #n. */
if ((uc_key >= '0')
&& (uc_key <= ('0' + NUM_SPCK_CONFIGURATIONS - 1))) {
spi_set_clock_configuration(uc_key - '0');
}
break;
}
}
}
