void LED_blink(uint8_t LED)
{
PIN_toggle(LED);
delay_ms(25);
PIN_toggle(LED);
delay_ms(25);
return;
}
uint8_t spi_transfer(uint8_t message)
{
uint8_t* reg_ptr;
uint8_t timeout = SPI_TIMEOUT;
uint8_t receive_char;
uint8_t i, temp, temp2;
reg_ptr = SPDR_BASE;
// Commence the SPI message.
SS_set_low();
*reg_ptr = message;
reg_ptr = SPSR_BASE;
while(!(*reg_ptr & SPI_SPSR_SPIF)) // Check if the transmission has completed yet.
{
if(!timeout--)
{
//SS_set_high();
return 0x00; // Something went wrong, so the function times out.
if(SELF_ID != 1)
{
PIN_toggle(LED2);
}
}
}
reg_ptr = SPDR_BASE;
receive_char = *reg_ptr;
//SS_set_high();
delay_cycles(10);
// I was assuming that SPI messages would be received MSB first.
// Comment out the following if that is not the case.
//temp = 0, temp2 = 0;
//
//for (i = 0; i < 8; i ++)
//{
//temp2 = receive_char << (7 - i); // reverses the order of the bits.
//temp2 = temp2 >> 7;
//temp2 = temp2 << (7 - i);
//temp += temp2;
//}
return receive_char; // Transmission was successful, return the character that was received.
}
void decode_command(uint8_t* command_array)
{
uint8_t i, command = *(command_array + 5);
uint8_t req_by = (*(command_array + 7)) >> 4;
switch(command)
{
case REQ_RESPONSE :
if(SELF_ID != 1)
{
PIN_toggle(LED3);
}
send_now = 1;
case REQ_DATA :
if(SELF_ID != 1)
{
PIN_toggle(LED1);
}
send_data = 1;
for (i = 0; i < 8; i ++)
{
data_req_arr[i] = *(command_array + i);
}
case REQ_HK :
if(SELF_ID != 1)
{
PIN_toggle(LED2);
}
send_hk = 1;
case REQ_READ:
read_response = 1;
for (i = 0; i < 8; i ++)
{
read_arr[i] = *(command_array + i);
}
case REQ_WRITE:
write_response = 1;
for (i = 0; i < 8; i ++)
{
write_arr[i] = *(command_array + i);
}
case SET_SENSOR_HIGH:
set_sens_h = 1;
for (i = 0; i < 8; i ++)
{
sensh_arr[i] = *(command_array + i);
}
case SET_SENSOR_LOW:
set_sens_l = 1;
for (i = 0; i < 8; i ++)
{
sensl_arr[i] = *(command_array + i);
}
case SET_VAR:
set_varf = 1;
for (i = 0; i < 8; i ++)
{
setv_arr[i] = *(command_array + i);
}
case SET_TIME:
CURRENT_MINUTE = *(command_array);
case SEND_TM:
new_tm_msgf = 1;
for (i = 0; i < 8; i ++)
{
new_tm_msg[i] = *(command_array + i);
}
case TM_PACKET_READY:
if((!current_tm_fullf) && (!receiving_tmf))
start_tm_packet();
case TC_TRANSACTION_RESP:
tc_transfer_completef = *command_array;
case OK_START_TC_PACKET:
start_tc_transferf = 1;
default:
return;
}
return;
}
