int main()
{
/*
* Initialize the SYSTICK timer
*/
systick_init();
/*
* Demonstrate use of LED.h/LED.c - modifies hardware registers using C
*/
LED_init();
LED_update(LED_BLUE_ON);
LED_update(LED_BLUE_OFF);
LED_update(LED_RED_ON | LED_BLUE_ON | LED_ORANGE_ON | LED_GREEN_ON );
/*
* Demonstrate use of in-line assembly - enable interrupts
*/
__asm (" cpsie i \n" );
/* Initialize the USART for 9600, 8N1, send '!' - calls into USART2.S */
/* NOTE: must set USART2 interrupt config register to enable TX/RX interrupts */
USART2_init();
USART2_send('!');
uint32_t test_val = 785904457;
printHex(785904457);
/* Wait here forever */
while(1);
/* We'll never reach this line */
return 0;
}
void __attribute__ ((interrupt)) USART3_handler(void) {
char c = USART3_recv(); // Always immediately read the input
switch (mode_state) {
case CONFIGURE_S: // In configure, pass to console
{
USART2_send(c);
break;
}
case CLIENT_S:
case COMMAND_S: // Intentional fall-through - these do the same thing
{
/* Read in consecutive bytes of the message */
*(((char*)&recv_msg)+recv_offset) = c;
recv_offset++;
/* When we get the full message, set a flag for it
* to print in the main loop, and clear the recv_offset
* and waiting_to_recv_packet flag
*/
if (recv_offset == sizeof(Update_resp_t)) {
received_new_packet = 1;
recv_offset = 0;
waiting_to_recv_packet = 0;
}
break;
}
default:
break;
}
}
/*
* void printHex(uint32_t value):
*
* Prints the hexadecimal representation of value.
*/
void printHex(uint32_t value){
//Print out 0x
uint8_t zero = 48;
USART2_send(48);
uint8_t x = 120;
USART2_send(x);
static char hex_digits[] = "0123456789ABCDEF";
//Print out the hexadecimal representation of the number
uint32_t mask = 0xF0000000;
int i;
for( i = 7; i >= 0; i-- ){
//Mask out all but the highest 4 bits
uint32_t masked_value = value & mask;
//Shift off all but the highest 4 bits
masked_value = masked_value >> 4*i;
mask = mask >> 4;
//Print out the hexadecimal representation of the value
USART2_send(hex_digits[masked_value]);
}
}
void __attribute__ ((interrupt)) USART2_handler(void) {
char c = USART2_recv(); // Always immediately read the input
switch (mode_state) {
case CONFIGURE_S: // In configure mode, pass it along to the WiFly
USART3_send(c);
break;
default: // Other modes just echo back input
USART2_send(c);
break;
}
}
/*
* The USART2 Interrupt Service Routine
*/
void __attribute__ ((interrupt)) USART2_handler(void)
{
/* This code receives input from the USART2
* interface and repeats it back to the user
* on the same interface.
*/
uint8_t c = USART2_recv();
USART2_send(c);
//Check if the input was one of our commands:
//h - history
if(c == 'h'){
//Print the history
}
if(c == 'a'){
//Print the average of the history
}
}
