static irqreturn_t r_irq_handler(int irq, void *dev_id, struct pt_regs *regs) {
unsigned long flags;
unsigned char data[PACKET_DATA_LENGTH_WITH_SIZE];
int data_length;
local_irq_save(flags);
data_length = _receive_packet(data);
local_irq_restore(flags);
if(data_length == -RF_ERR_TOUT)
return IRQ_HANDLED;
if(data_length == -RF_ERR_CRC_ERROR) {
printk(KERN_NOTICE DEV_NAME ": CRC error\n");
return IRQ_HANDLED;
}
if(data_length > PACKET_DATA_LENGTH_WITH_SIZE) {
printk(KERN_NOTICE DEV_NAME ": wrong data length in incoming packet (%d), packet dropped\n", data_length);
return IRQ_HANDLED;
}
spin_lock(&buffer_lock);
_add_received_packet_to_buffer(data);
spin_unlock(&buffer_lock);
return IRQ_HANDLED;
}
unsigned char
handle_interrupt() {
unsigned char bytes_received = _receive_packet();
rfm12_DisableRx();
rfm12_DisableFifo();
// Process the packet, but only if the application has dealt with the
// last packet. If not, it will be silently dropped..
if (!data_arrived) {
_process_packet(bytes_received);
}
rfm12_EnableFifo();
rfm12_EnableRx();
return 1;
}
