__interrupt void USCI0RX_ISR(void)
{
switch (working_mode) {
case MODE_PC_CONN_WAIT:
switch (UCA0RXBUF) {
case PC_REQUEST_CONNECT:
sendUart(DEVICE_RESPONCE_CONNECTED);
working_mode = MODE_PC_CONN_ACTIVE;
sendUartString("Connected...\r\n", 14);
break;
default:
sendUartString("Awaiting connection...\r\n", 24);
break;
}
break;
case MODE_PC_CONN_ACTIVE:
switch (UCA0RXBUF) {
case PC_REQUEST_GET_DATA:
sendUart('T');
break;
case PC_REQUEST_DISCONNECT:
working_mode = MODE_PC_CONN_WAIT;
sendUartString("Disconnected.\r\n", 15);
break;
default:
sendUartString("Unknown request code.\r\n", 23);
break;
}
break;
default:
break;
}
}
int
main(void)
{
ioinit();
timer_init();
/* all devices initialize themselves as slaves */
USI_TWI_Slave_Initialise(TWI_BROADCAST_ADDRESS);
#if WE_NEED_TO_TEST_UART /* for debugging only */
uint8_t counter = 0;
while (true) {
++counter;
sendUart('a' + (counter % 26));
_delay_ms(1000);
}
#endif /* #if WE_NEED_TO_TEST_UART */
/* loop forever */
for (;; ) {
uint8_t byte = USI_TWI_Receive_Byte();
sendUart(byte);
}
/* we will never come here. */
return (0);
}
int
main(void)
{
avr_init();
/* all devices initialize themselves as slaves in TWI*/
USI_TWI_Slave_Initialise(TWI_BROADCAST_ADDRESS);
/* main loop */
while(1) {
if (uart_dataReceived) { // if we have received anything over UART
USI_TWI_Master_Initialise(); // Initialize ourselves as TWI master
uint8_t buffer[2];
buffer[0] =
(TWI_BROADCAST_ADDRESS << TWI_ADR_BITS) | /* address */
(FALSE << TWI_READ_BIT); /* write operation */
buffer[1] = uart_data; /* The data we received over UART has to be sent
* over TWI. */
sendUart(uart_data);
while (!USI_TWI_Start_Transceiver_With_Data(buffer, 2)); /* Transmit, and
* re-transmit
* till
* successful. */
sendUart(uart_data);
uart_dataReceived = false; /* we've consumed the data from UART.. */
/* reinitialize ourself as a slave in TWI*/
USI_TWI_Slave_Initialise(TWI_BROADCAST_ADDRESS);
} else if (USI_TWI_Data_In_Receive_Buffer()) { /* have we
* received
* anything
* over TWI? */
// temporary:
USI_TWI_Master_Initialise(); // Initialize ourselves as TWI master
uint8_t buffer[2];
buffer[0] =
(TWI_BROADCAST_ADDRESS << TWI_ADR_BITS) | /* address */
(FALSE << TWI_READ_BIT); /* write operation */
buffer[1] = 0xf3; /* The data we received over UART has to be sent
* over TWI. */
while (!USI_TWI_Start_Transceiver_With_Data(buffer, 2)); /* Transmit, and
* re-transmit
* till
* successful. */
buffer[0] =
(TWI_BROADCAST_ADDRESS << TWI_ADR_BITS) | /* address */
(FALSE << TWI_READ_BIT); /* write operation */
buffer[1] = 0x08; /* The data we received over UART has to be sent
* over TWI. */
while (!USI_TWI_Start_Transceiver_With_Data(buffer, 2)); /* Transmit, and
* re-transmit
* till
* successful. */
// temporary till here
uint8_t TWI_data = USI_TWI_Receive_Byte(); // Receive that data
sendUart(TWI_data); // Transmit it over UART
}
}
}