Mohamed Azad
bcn code modification for new short bcn format
Fork of
BEACON_CODE
by 
pradeep shekhar
Diff: BCN.cpp
- Revision:
- 26:e5d6c0cffa82
- Parent:
- 25:90cdfbadea91
diff -r 90cdfbadea91 -r e5d6c0cffa82 BCN.cpp
--- a/BCN.cpp Sat Nov 07 10:23:10 2015 +0000
+++ b/BCN.cpp Tue May 17 15:13:49 2016 +0000
@@ -5,11 +5,13 @@
//Takes max 4.3 sec in void FCTN_BCN_TX_MAIN() (temp.calc. + long_beacon + short_beacon)
Serial pc_bcn(USBTX, USBRX); //tx,rx
-//SPI spi(D11, D12, D13); // mosi, miso, sclk
-//DigitalOut cs(D10); //slave select or chip select
-SPI spi(PIN16, PIN17, PIN15); // mosi, miso, sclk
-DigitalOut cs(PIN6); //slave select or chip select
+SPI spi(D11, D12, D13); // mosi, miso, sclk
+DigitalOut cs(D10); //slave select or chip select
+//SPI spi(PIN16, PIN17, PIN15); // mosi, miso, sclk
+//DigitalOut cs(PIN6); //slave select or chip select
Timer t_i;//timer for checking the time taken by (temp.calc. + long_beacon + short_beacon)
+//Timer t_is;//timer for short_beacon
+//Timer t_il;//timer for long_beacon
Timeout rf_sl_timeout;//RF_silence timer
Ticker loop;//for transmitting every 10 secs
@@ -44,6 +46,7 @@
pc_bcn.printf("FCTN_BCN_TX_MAIN\n");
t_i.start();
int begin = t_i.read_us();
+ int begins,beginl,ends,endl;
BCN_TX_MAIN_STATUS = 1;
if(BCN_FEN == 1)
@@ -64,8 +67,17 @@
else
{
//transmit short beacon and long beacon
+ //t_is.start();
+ begins = t_i.read_us();
SHORT_BCN_TX();
+ //t_is.stop();
+ ends = t_i.read_us();
+
+ //t_il.start();
+ beginl = t_i.read_us();
LONG_BCN_TX();
+ //t_il.stop();
+ endl = t_i.read_us();
if(Check_ACK_RECEIVED() == 1)
{
@@ -94,6 +106,8 @@
t_i.stop();
int end = t_i.read_us();
pc_bcn.printf("The time required for FCTN_BCN_TX_MAIN is %d useconds\r\n", end-begin);
+ pc_bcn.printf("The time required for Short_BCN is %d useconds\r\n", ends-begins);
+ pc_bcn.printf("The time required for Long_BCN is %d useconds\r\n", endl-beginl);
ERROR_CHECK = 0;
}
@@ -117,8 +131,13 @@
void SHORT_BCN_TX()
{
+ /*
writereg(RF22_REG_6E_TX_DATA_RATE,0x01);
writereg(RF22_REG_6F_TX_DATA_RATE,0x50);//160bps
+ */
+ writereg(RF22_REG_6E_TX_DATA_RATE,0x0A);
+ writereg(RF22_REG_6F_TX_DATA_RATE,0x7D);//1280bps
+
writereg(RF22_REG_3E_PACKET_LENGTH,SHORT_TX_DATA); //short packet length
wait(0.02);
@@ -139,14 +158,14 @@
uint8_t short_beacon[] = { 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,Shortbeacon.Voltage[0],Shortbeacon.AngularSpeed[0], Shortbeacon.AngularSpeed[1],Shortbeacon.SubsystemStatus[0],Shortbeacon.Temp[0],Shortbeacon.Temp[1],Shortbeacon.Temp[2],Shortbeacon.ErrorFlag[0]};
//writereg(RF22_REG_07_OPERATING_MODE1,0x01); //ready mode ??
- clearTxBuf();
- //writing data first time
- int byte = 0;
- cs = 0;
- spi.write(0xFF);
-
+ clearTxBuf(); //writing data first time
+
+ int byte = 0,byte_count=0;
+ //int spi_start,spi_end,spi_total=0;
for (int byte_counter = 0; byte_counter <15 ; byte_counter++)
{
+ //pc_bcn.printf("byte-counter=%d\r\n", byte_counter);
+ /*
for(int j = 3; j >= 0 ; j--)
{
if((short_beacon[byte_counter] & (uint8_t) pow(2.0,(j*2+1)))!= pow(2.0,(j*2+1)))
@@ -165,40 +184,89 @@
{
byte=byte | 0x0F;
}
+ cs = 0;
+ spi.write(0xFF);
spi.write(byte);
+ cs = 1;
}
+ */
+ for(int j = 7; j >= 0 ; j--)
+ {
+ //spi_start = t_i.read_us();
+ if((short_beacon[byte_counter] & (uint8_t) pow(2.0,j))!= pow(2.0,j))
+ {
+ byte=0x00;
+ }
+ else
+ {
+ byte=0xFF;
+ }
+
+ cs = 0;
+ spi.write(0xFF);
+ spi.write(byte);
+ spi.write(byte);
+ spi.write(byte);
+ spi.write(byte); //Each bit is written 32 times
+ byte_count+=4;
+ cs = 1;
+
+ //spi_end = t_i.read_us();
+ //spi_total += spi_end-spi_start;
+ //pc_bcn.printf("Time taken to write one byte = %d\r\n",spi_end-spi_start);
+ }
+
+ if(byte_counter % 2 == 1)
+ {
+
+ //Set to Tx mode
+ writereg(RF22_REG_07_OPERATING_MODE1,0x08); //txon
+ wait(0.1);// takes time to set to tx mode hence the delay of 0.1.
+
+ //Check for fifoThresh
+ while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x20) == 0x20)break;else if(timeout_count == 1)
+ {
+ pc_bcn.printf("Reset\n");
+ reset_rfm(1);}
+ timeout_count=10e5;
+
+ }
+
}
-
- cs = 1;
-
+
//Set to Tx mode
writereg(RF22_REG_07_OPERATING_MODE1,0x08); //txon
wait(0.1);// takes time to set to tx mode hence the delay of 0.1.
//Check for fifoThresh
- while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x20) == 0x20)break;else if(timeout_count == 1) reset_rfm(1);
+ while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x20) == 0x20)break;else if(timeout_count == 1)
+ {
+ pc_bcn.printf("Reset\n");
+ reset_rfm(1);}
timeout_count=10e5;
- //Check for packet_sent
+ //Check for packetsent interrupt
while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x04) == 0x04)break;else if(timeout_count == 1) reset_rfm(1);
- //pc_bcn.printf("Short packet sent\r\n");
+ pc_bcn.printf("Short packet sent, bytes = %d\r\n",byte_count);
writereg(RF22_REG_07_OPERATING_MODE1,0x00); //standby mode
}
void LONG_BCN_TX()
{
+ /*
writereg(RF22_REG_6E_TX_DATA_RATE,0x04);
writereg(RF22_REG_6F_TX_DATA_RATE,0xEA);//600 bps
+ */
writereg(RF22_REG_3E_PACKET_LENGTH,LONG_TX_DATA); //long packet length
wait(0.02);
uint32_t timeout_count=10e5;
//get long_beacon array
- uint8_t Long_beacon[75];
- for(int i = 0;i<75;i++)
+ uint8_t Long_beacon[LONG_TX_DATA];
+ for(int i = 0;i<LONG_TX_DATA;i++)
{
Long_beacon[i] = 0xA0;
}
@@ -207,7 +275,7 @@
//writing data first time
cs = 0;
spi.write(0xFF);
- for(int i=0; i<60;i++)
+ for(int i=0; i<64;i++)
{
spi.write(Long_beacon[i]);
}
@@ -218,19 +286,25 @@
wait(0.1);//necessary
//Check for fifoThresh
- while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x20) == 0x20)break;else if(timeout_count == 1) reset_rfm(1);
+ while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x20) == 0x20)break;else if(timeout_count == 1)
+ {
+ pc_bcn.printf("Reset\n");
+ reset_rfm(1);}
timeout_count=10e5;
cs = 0;
spi.write(0xFF);
- for(int i=60; i<75;i++)
+ for(int i=64; i<127;i++)
{
spi.write(Long_beacon[i]);
}
cs = 1;
wait(0.1);
//Check for fifoThresh
- while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x20) == 0x20)break;else if(timeout_count == 1) reset_rfm(1);
+ while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x20) == 0x20)break;else if(timeout_count == 1)
+ {
+ pc_bcn.printf("Reset\n");
+ reset_rfm(1);}
timeout_count=10e5;
//Check for packetsent interrupt
@@ -365,7 +439,11 @@
//set Modem Configuration
writereg(RF22_REG_58,0x80);
- //Data rate set later
+ //Set Data rate - same for both long and short beacon
+
+ writereg(RF22_REG_6E_TX_DATA_RATE,0x0A);
+ writereg(RF22_REG_6F_TX_DATA_RATE,0x7D);//1280bps
+
writereg(RF22_REG_70_MODULATION_CONTROL1,0x20);
writereg(RF22_REG_71_MODULATION_CONTROL2,0x21);//ook = 0x21