/*How SPI slave should work:
When the CS line goes low... interrupt to enable SPI_slave
when overflow happens, an overflow interrupt shall go off and send the data it recieved via uart
When the CS line goes high... interrupt to disable the SPI_slave
*/
void SPI_initializeSlave(void) {
DDRB |= (1 << DO);
DDRB &= ~((1 << SCK) | (1 << DI) );
USICR = (1 << USIWM0) | (1 << USICS1); //spi mode | clock source is positive edge using USCK pin
//configure the pin change interrupt on INT0 -> PD2
MCUCR &= ~(1 << ISC01);
MCUCR |= (1 << ISC00);
GIMSK |= (1 << INT0);
UART_initialize();
}
//--------------------------------------------------------------------------//
// Function: main //
//--------------------------------------------------------------------------//
void main(void)
{
int c;
//inicjalizacje
Init_Interrupts();
LED_Init();
UART_initialize(115200);
//jakiœ tam komunikat powitalny
UART_putc('H');
UART_putc('e');
UART_putc('l');
UART_putc('l');
UART_putc('o');
for (;;)
{
//odbieramy znak i odbijamy go na terminal
c = UART_getc();
UART_putc(c);
//w zale¿noœci od tego co przysz³o, prze³¹czamy stan jednej z diod
switch (c)
{
case '1':
*pPORTFIO_TOGGLE = 0x0040;
break;
case '2':
*pPORTFIO_TOGGLE = 0x0080;
break;
case '3':
*pPORTFIO_TOGGLE = 0x0100;
break;
case '4':
*pPORTFIO_TOGGLE = 0x0200;
break;
case '5':
*pPORTFIO_TOGGLE = 0x0400;
break;
case '6':
*pPORTFIO_TOGGLE = 0x0800;
break;
}
}
}
/*! \fn int main(void)
\brief Start of main program
\details Initializes the peripherals and starts the OS
*/
int main(void)
{
osKernelInitialize (); // initialize CMSIS-RTOS
// initialize peripherals
UART_initialize();
printf("\n\rRavenOS demo\n\r");
LED_initialize();
printf("Initializing threads\n\r");
if (Init_thread0() != 0)
{
stop_cpu;
}
if (Init_thread1() != 0)
{
stop_cpu;
}
if (Init_thread2() != 0)
{
stop_cpu;
}
// // thread3 is a low priority thread can be used as a more user obvious alternative to print tracing from UART,
// // which currently resides in the Idle thread (operated by the RTOS)
// if (Init_thread3() != 0)
// {
// stop_cpu;
// }
printf("Initializing semaphores\n\r");
if (Init_Semaphore0() != 0)
{
stop_cpu;
}
if (Init_Semaphore1() != 0)
{
stop_cpu;
}
printf("Start kernel\n\r");
osKernelStart (); // start thread execution
// Should not be here
stop_cpu;
}
