void rx_task()
{
char c;
nrk_sig_t uart_rx_signal;
nrk_sig_mask_t sm;
printf( "My node's address is %d\r\n",NODE_ADDR );
printf( "rx_task PID=%d\r\n",nrk_get_pid());
// Get the signal for UART RX
uart_rx_signal=nrk_uart_rx_signal_get();
// Register your task to wakeup on RX Data
if(uart_rx_signal==NRK_ERROR) nrk_kprintf( PSTR("Get Signal ERROR!\r\n") );
nrk_signal_register(uart_rx_signal);
while(1) {
// Wait for UART signal
while(nrk_uart_data_ready(NRK_DEFAULT_UART)!=0)
{
// Read Character
c=getchar();
printf( "%c",c);
if(c=='x') nrk_led_set(GREEN_LED);
else nrk_led_clr(GREEN_LED);
}
sm=nrk_event_wait(SIG(uart_rx_signal));
if(sm != SIG(uart_rx_signal))
nrk_kprintf( PSTR("RX signal error") );
nrk_kprintf( PSTR("\r\ngot uart data: ") );
}
}
void tx_task ()
{
int8_t v,state,outlet_state,dst_mac, outlet;
uint8_t len, cnt;
nrk_sig_t uart_rx_signal;
char c;
printf ("Gateway Tx Task PID=%u\r\n", nrk_get_pid ());
while (!tdma_started ())
nrk_wait_until_next_period ();
uart_rx_signal=nrk_uart_rx_signal_get();
nrk_signal_register(uart_rx_signal);
cnt = 0;
state=0;
while (1) {
if(nrk_uart_data_ready(NRK_DEFAULT_UART))
{
c=getchar();
if(state==1) {
dst_mac=c;
state=2;
} else if(state==2) {
outlet=c;
state=3;
} else if(state==3)
{
outlet_state=c;
state=4;
}
if(c=='S') state=1;
if(c=='E') {
if(state==4)
{
printf( "TX: %d %d %d\r\n",dst_mac, outlet, outlet_state );
tx_buf[0]=dst_mac;
tx_buf[1]=outlet;
tx_buf[2]=outlet_state;
len=3;
// Only transmit data if you want to do so
// Messages from the host are always broadcasts
v = tdma_send (&tx_tdma_fd, &tx_buf, len, TDMA_BLOCKING);
if (v == NRK_OK) {
nrk_kprintf (PSTR ("Host Packet Sent\n"));
}
}
state=0;
}
} else nrk_event_wait(SIG(uart_rx_signal));
}
}
void tx_task ()
{
uint8_t j, i, val, len, byte_cnt, got_start;
int8_t v;
nrk_sig_t tx_done_signal;
nrk_sig_mask_t ret;
nrk_time_t r_period;
nrk_sig_t uart_rx_signal;
nrk_sig_mask_t sm;
// Get the signal for UART RX
uart_rx_signal=nrk_uart_rx_signal_get();
// Register your task to wakeup on RX Data
if(uart_rx_signal==NRK_ERROR) nrk_kprintf( PSTR("Get Signal ERROR!\r\n") );
nrk_signal_register(uart_rx_signal);
printf ("tx_task PID=%d\r\n", nrk_get_pid ());
// Wait until the tx_task starts up bmac
// This should be called by all tasks using bmac that
// do not call bmac_init()...
while (!bmac_started ())
nrk_wait_until_next_period ();
nrk_led_set(RED_LED);
// Sample of using Reservations on TX packets
// This example allows 2 packets to be sent every 5 seconds
// r_period.secs=5;
// r_period.nano_secs=0;
// v=bmac_tx_reserve_set( &r_period, 2 );
// if(v==NRK_ERROR) nrk_kprintf( PSTR("Error setting b-mac tx reservation (is NRK_MAX_RESERVES defined?)\r\n" ));
// Get and register the tx_done_signal if you want to
// do non-blocking transmits
tx_done_signal = bmac_get_tx_done_signal ();
nrk_signal_register (tx_done_signal);
bmac_set_cca_active(0);
ctr_cnt[0]=0; ctr_cnt[1]=0; ctr_cnt[2]=0; ctr_cnt[3]=0;
while (1) {
// Wait for UART signal
got_start=0;
byte_cnt=0;
do {
sm=nrk_event_wait(SIG(uart_rx_signal));
while(nrk_uart_data_ready(NRK_DEFAULT_UART)!=0)
{
// Read Character
val=getchar();
tx_buf[byte_cnt]=val;
if(got_start && val==0xff )
{
nrk_led_toggle(ORANGE_LED);
printf( "0xff byte: %d\n", byte_cnt );
byte_cnt=0;
got_start=0;
val=1; // Something other than 0xff so that the
// got_start isn't set
}
if(val==0xff)
{
nrk_led_toggle(GREEN_LED);
got_start=1;
}
if(got_start) byte_cnt++;
if(byte_cnt>3) break;
}
} while(byte_cnt<4);
// Build a TX packet
nrk_led_set (BLUE_LED);
// Auto ACK is an energy efficient link layer ACK on packets
// If Auto ACK is enabled, then bmac_tx_pkt() will return failure
// if no ACK was received. In a broadcast domain, the ACK's will
// typically collide. To avoid this, one can use address decoding.
// The functions are as follows:
// bmac_auto_ack_enable();
// bmac_auto_ack_disable();
// Address decoding is a way of preventing the radio from receiving
// packets that are not address to a particular node. This will
// supress ACK packets from nodes that should not automatically ACK.
// The functions are as follows:
// bmac_addr_decode_set_my_mac(uint16_t MAC_ADDR);
// bmac_addr_decode_dest_mac(uint16_t DST_ADDR); // 0xFFFF is broadcast
// bmac_addr_decode_enable();
// bmac_addr_decode_disable();
ctr_cnt[0]++;
if(ctr_cnt[0]==255) ctr_cnt[1]++;
if(ctr_cnt[1]==255) ctr_cnt[2]++;
if(ctr_cnt[2]==255) ctr_cnt[3]++;
// You need to increase the ctr on each packet to make the
// stream cipher not repeat.
bmac_encryption_set_ctr_counter(&ctr_cnt,4);
// For blocking transmits, use the following function call.
// For this there is no need to register
/* nrk_kprintf( PSTR("Sending: ") );
for(i=0; i<byte_cnt; i++ )
printf( "%d ",tx_buf[i] );
nrk_kprintf( PSTR("\r\n") );
*/
val=bmac_tx_pkt(tx_buf, byte_cnt);
// This function shows how to transmit packets in a
// non-blocking manner
// val = bmac_tx_pkt_nonblocking(tx_buf, strlen (tx_buf));
// nrk_kprintf (PSTR ("Tx packet enqueued\r\n"));
// This functions waits on the tx_done_signal
// ret = nrk_event_wait (SIG(tx_done_signal));
// Just check to be sure signal is okay
// if(ret & SIG(tx_done_signal) == 0 )
// nrk_kprintf (PSTR ("TX done signal error\r\n"));
// If you want to see your remaining reservation
// printf( "reserve=%d ",bmac_tx_reserve_get() );
// Task gets control again after TX complete
nrk_led_clr (BLUE_LED);
}
}
void uart_task()
{
char c;
nrk_sig_t uart_rx_signal;
//nrk_sig_mask_t sm;
uint8_t buf_pos = 0;
uint8_t vbuf_pos = 0;
uint8_t pos = 0;
uint8_t other_active = 1;
uint8_t version_buf[VERSION_BUF_SIZE];
int16_t my_version = 0;
uint8_t connection_l;
uint8_t activate_uart_l;
uint8_t ack_received_l;
if(log_g) printf("log:uart_task PID=%d\r\n",nrk_get_pid());
// Get the signal for UART RX
uart_rx_signal=nrk_uart_rx_signal_get();
// Register your task to wakeup on RX Data
if(uart_rx_signal==NRK_ERROR) nrk_kprintf( PSTR("log:Get Signal ERROR!\r\n") );
nrk_signal_register(uart_rx_signal);
while(1) {
nrk_sem_pend(conn_sem);
connection_l = connection_g;
nrk_sem_post(conn_sem);
nrk_sem_pend(ack_sem);
ack_received_l = ack_received_g;
nrk_sem_post(ack_sem);
if(activate_uart_g == 1 && other_active == 1)
{
memset(uart_rx_buf,0,buf_pos);
buf_pos = 0;
if(log_g) printf("log:Switching off logs\r\n");
req_for_next_data();
log_g = 0;
other_active = 0;
}
else if(activate_uart_g == 0 && vertsk_active_g == 0)
{
nrk_wait_until_next_period();
continue;
} else if(activate_uart_g == 0 && connection_l == 0 && vertsk_active_g == 1) { // assuming this completes in one period
if(log_g)nrk_kprintf(PSTR("verreq\n"));
log_g = 0;
while(nrk_uart_data_ready(NRK_DEFAULT_UART)!=0)
{
// Read Character
c=getchar();
if(vbuf_pos >= VERSION_BUF_SIZE)
{
vbuf_pos = 0;
nrk_kprintf(PSTR("Ver buf ovflw\n"));
}
version_buf[vbuf_pos++] = c;
nrk_led_toggle(GREEN_LED);
if(c =='&')
{
log_g = 1;
version_buf[vbuf_pos++] = '\0';
pos = 0;
my_version = get_next_int(version_buf,&pos,vbuf_pos);
if(log_g) printf("log:Ver %d\n",my_version);
version_g[MAC_ADDR] = my_version;
if(vbuf_pos > 6)
{
if(log_g)nrk_kprintf(PSTR("Cnct Frnd\n"));
pos++;
bmac_tx_pkt(version_buf+pos,vbuf_pos-pos);
}
vertsk_active_g = 0;
vbuf_pos = 0;
} else if (c == '$') {
vbuf_pos = 0;
}
}
log_g = 1;
nrk_wait_until_next_period();
continue;
}
nrk_sem_pend(conn_sem);
connection_l = connection_g;
nrk_sem_post(conn_sem);
nrk_sem_pend(ack_sem);
ack_received_l = ack_received_g;
nrk_sem_post(ack_sem);
if(ack_received_l == 1 && connection_l == 1)
{
while(nrk_uart_data_ready(NRK_DEFAULT_UART)!=0)
{
// Read Character
c=getchar();
uart_rx_buf[buf_pos++] = c;
nrk_led_toggle(GREEN_LED);
if(c =='$')
{
log_g = 1;
uart_rx_buf[buf_pos++] = '\0';
if(log_g) nrk_kprintf(PSTR("log:From UART\n"));
if(log_g) printf("log:%s\n",uart_rx_buf);
activate_uart_g = 0;
other_active = 1;
// tx a packet
bmac_tx_pkt(uart_rx_buf,buf_pos);
nrk_sem_pend(ack_sem);
ack_received_g = 0;
nrk_sem_post(ack_sem);
ack_received_l = 0;
pending_retransmit_g = 1;
} else if (c == '&') {
buf_pos = 0;
}
}
log_g = 1;
}
//sm=nrk_event_wait(SIG(uart_rx_signal));
//if(sm != SIG(uart_rx_signal))
// nrk_kprintf( PSTR("RX signal error\n") );
nrk_wait_until_next_period();
}
}
int8_t slip_rx (uint8_t * buf, uint8_t max_len)
{
uint8_t c;
uint8_t index, last_c;
uint8_t received, checksum, size;
int8_t v;
my_uart_rx_signal=nrk_uart_rx_signal_get();
// Register your task to wakeup on RX Data
if (my_uart_rx_signal == NRK_ERROR)
nrk_kprintf (PSTR ("SLIP RX error: Get Signal\r\n"));
v=nrk_signal_register (my_uart_rx_signal);
if(v==NRK_ERROR) nrk_kprintf( PSTR( "SLIP RX error: nrk_signal_register\r\n" ));
received = 0;
if( nrk_uart_data_ready (NRK_DEFAULT_UART) == 0) sm = nrk_event_wait (SIG (my_uart_rx_signal));
// Wait until you receive the packet start (START) command
while (1) {
// Wait for UART signal
while (nrk_uart_data_ready (NRK_DEFAULT_UART) != 0) {
// Read Character
//c = getchar ();
c = get_byte();
if (c == START)
goto start;
}
if( nrk_uart_data_ready (NRK_DEFAULT_UART) == 0) sm = nrk_event_wait (SIG (my_uart_rx_signal));
c = get_byte();
//c = getchar ();
if (c == START)
break;
}
start:
size = get_byte ();
checksum = 0;
while (1) {
if( nrk_uart_data_ready (NRK_DEFAULT_UART) == 0) sm = nrk_event_wait (SIG (my_uart_rx_signal));
while (nrk_uart_data_ready (NRK_DEFAULT_UART) != 0) {
last_c = c;
//c = getchar ();
c = get_byte();
// handle bytestuffing if necessary
switch (c) {
// if it's an END character then we're done with
// the packet
case END:
// a minor optimization: if there is no
// data in the packet, ignore it. This is
// meant to avoid bothering IP with all
// the empty packets generated by the
// duplicate END characters which are in
// turn sent to try to detect line noise.
if (received) {
checksum &= 0x7f;
if (last_c == checksum)
return received;
}
nrk_kprintf( PSTR( "Checksum failed: ") );
printf( "%d %d %d\r\n",received, last_c, checksum );
//return NRK_ERROR;
return received;
break;
// if it's the same code as an ESC character, wait
// and get another character and then figure out
// what to store in the packet based on that.
case ESC:
last_c = c;
if( nrk_uart_data_ready (NRK_DEFAULT_UART)==0 ) sm = nrk_event_wait (SIG (my_uart_rx_signal));
c = get_byte ();
// if "c" is not one of these two, then we
// have a protocol violation. The best bet
// seems to be to leave the byte alone and
// just stuff it into the packet
switch (c) {
case END:
c = END;
break;
case ESC:
c = ESC;
break;
}
// here we fall into the default handler and let
// it store the character for us
default:
if (received < max_len && received < size) {
buf[received++] = c;
checksum += c;
}
}
}
}
return 0;
}
