void RFM69_send(const uint8_t* data, uint8_t len, uint8_t power)
{
// power is TX Power in dBmW (valid values are 2dBmW-20dBmW)
if(power<2 || power >20) {
// Could be dangerous, so let's check this
return;
}
uint8_t oldMode = _mode;
// Copy data into TX Buffer
memcpy(_buf, data, len);
// Update TX Buffer Size
_bufLen = len;
RFM69_clearFifo();
// Start Transmitter
RFM69_setMode(RFM69_MODE_TX);
// Set up PA
if(power<=17) {
// Set PA Level
uint8_t paLevel = power + 14;
spiWrite(RFM69_REG_11_PA_LEVEL, RF_PALEVEL_PA0_OFF | RF_PALEVEL_PA1_ON | RF_PALEVEL_PA2_ON | paLevel);
} else {
// Disable Over Current Protection
spiWrite(RFM69_REG_13_OCP, RF_OCP_OFF);
// Enable High Power Registers
spiWrite(RFM69_REG_5A_TEST_PA1, 0x5D);
spiWrite(RFM69_REG_5C_TEST_PA2, 0x7C);
// Set PA Level
uint8_t paLevel = power + 11;
spiWrite(RFM69_REG_11_PA_LEVEL, RF_PALEVEL_PA0_OFF | RF_PALEVEL_PA1_ON | RF_PALEVEL_PA2_ON | paLevel);
}
// Wait for PA ramp-up
while(!(spiRead(RFM69_REG_27_IRQ_FLAGS1) & RF_IRQFLAGS1_TXREADY)) { };
// Throw Buffer into FIFO, packet transmission will start automatically
RFM69_spiFifoWrite(_buf, _bufLen);
// Clear MCU TX Buffer
_bufLen = 0;
// Wait for packet to be sent
while(!(spiRead(RFM69_REG_28_IRQ_FLAGS2) & RF_IRQFLAGS2_PACKETSENT)) {};
// Return Transceiver to original mode
RFM69_setMode(RFM69_MODE_RX);
// If we were in high power, switch off High Power Registers
if(power>17) {
// Disable High Power Registers
spiWrite(RFM69_REG_5A_TEST_PA1, 0x55);
spiWrite(RFM69_REG_5C_TEST_PA2, 0x70);
// Enable Over Current Protection
spiWrite(RFM69_REG_13_OCP, RF_OCP_ON | RF_OCP_TRIM_95);
}
}
/**
* It processing incoming data by the radio or serial connection. This function
* has to be continously called to keep the node running. This function also
* adds a delay which is specified as 100ms per unit. Therefore 1000 = 100 sec
* @param countdown delay added to this function
*/
void awaitData(int countdown) {
uint8_t rx_len;
//Clear buffer
data_temp[0] = '\0';
RFM69_setMode(RFM69_MODE_RX);
while(countdown > 0) {
// Check rx buffer
if(RFM69_checkRx() == 1) {
RFM69_recv(data_temp, &rx_len);
data_temp[rx_len - 1] = '\0';
#ifdef DEBUG
//rssi = RFM69_lastRssi();
printf("rx: %s\r\n",data_temp);
//printf("RSSI: %d\r\n, rssi");
#endif
processData(rx_len);
}
#ifdef SERIAL_IN
// Check tx buffer
checkTxBuffer();
#endif
countdown--;
mrtDelay(100);
}
}
void sleepRadio(){
//printf("Sleeping");
RFM69_setMode(RFM69_MODE_SLEEP);
init_sleep();
sleepMicro(TX_GAP * 100);
//printf("Awake");
}
/**
* Packet data transmission
* @param Packet length
*/
void transmitData(uint8_t i) {
#ifdef DEBUG
printf("tx: %s\r\n", data_temp);
#endif
// Transmit the data (need to include the length of the packet and power in dbmW)
RFM69_send(data_temp, i, POWER_OUTPUT);
//Ensure we are in RX mode
RFM69_setMode(RFM69_MODE_RX);
}
/**
* Packet data transmission
* @param Packet length
*/
void transmitData(uint8_t i) {
#ifdef GATEWAY
printf("rx: %s|0\r\n", data_temp);
#endif
#ifdef ZOMBIE_MODE
// Transmit the data (need to include the length of the packet and power in dbmW)
RFM69_send(data_temp, i, POWER_OUTPUT);
RFM69_setMode(RFM69_MODE_SLEEP);
#else
// Transmit the data (need to include the length of the packet and power in dbmW)
RFM69_send(data_temp, i, POWER_OUTPUT);
//Ensure we are in RX mode
RFM69_setMode(RFM69_MODE_RX);
#endif
}
int RFM69_readTemp()
{
// Store current transceiver mode
uint8_t oldMode = _mode;
// Set mode into Standby (required for temperature measurement)
RFM69_setMode(RFM69_MODE_STDBY);
// Trigger Temperature Measurement
spiWrite(RFM69_REG_4E_TEMP1, RF_TEMP1_MEAS_START);
// Check Temperature Measurement has started
if(!(RF_TEMP1_MEAS_RUNNING && spiRead(RFM69_REG_4E_TEMP1))){
return 255;
}
// Wait for Measurement to complete
while(RF_TEMP1_MEAS_RUNNING && spiRead(RFM69_REG_4E_TEMP1)) { };
// Read raw ADC value
uint8_t rawTemp = spiRead(RFM69_REG_4F_TEMP2);
// Set transceiver back to original mode
RFM69_setMode(oldMode);
// Return processed temperature value
int temperature = 168 - rawTemp;
return temperature;
}
/**
* It processing incoming data by the radio or serial connection. This function
* has to be continously called to keep the node running. This function also
* adds a delay which is specified as 100ms per unit. Therefore 1000 = 100 sec
* @param countdown delay added to this function
*/
void awaitData(int countdown) {
uint8_t rx_len, flags1, old_flags1 = 0x90;
//Clear buffer
data_temp[0] = '\0';
RFM69_setMode(RFM69_MODE_RX);
rx_restarts = 0;
while(countdown > 0) {
flags1 = spiRead(RFM69_REG_27_IRQ_FLAGS1);
#ifdef DEBUG
if (flags1 != old_flags1) {
printf("f1: %02x\r\n", flags1);
old_flags1 = flags1;
}
#endif
if (flags1 & RF_IRQFLAGS1_TIMEOUT) {
// restart the Rx process
spiWrite(RFM69_REG_3D_PACKET_CONFIG2, spiRead(RFM69_REG_3D_PACKET_CONFIG2) | RF_PACKET2_RXRESTART);
rx_restarts++;
// reset the RSSI threshold
floor_rssi = RFM69_sampleRssi();
#ifdef DEBUG
// and print threshold
printf("Restart Rx %d\r\n", RFM69_lastRssiThreshold());
#endif
}
// Check rx buffer
if(RFM69_checkRx() == 1) {
RFM69_recv(data_temp, &rx_len);
data_temp[rx_len - 1] = '\0';
processData(rx_len);
}
countdown--;
mrtDelay(100);
}
}
uint8_t RFM69_init()
{
mrtDelay(12);
//Configure SPI
spiInit(LPC_SPI0,24,0);
mrtDelay(100);
// Set up device
uint8_t i;
for (i = 0; CONFIG[i][0] != 255; i++)
spiWrite(CONFIG[i][0], CONFIG[i][1]);
RFM69_setMode(_mode);
// Clear TX/RX Buffer
_bufLen = 0;
return 1;
}
void RFM69_clearFifo() {
// Must only be called in RX Mode
// Apparently this works... found in HopeRF demo code
RFM69_setMode(RFM69_MODE_STDBY);
RFM69_setMode(RFM69_MODE_RX);
}
int main(void)
{
#ifdef ZOMBIE_MODE
LPC_SYSCON->BODCTRL = 0x11; //Should be set to Level 1 (Assertion 2.3V, De-assertion 2.4V) reset
#endif
#if defined(GATEWAY) || defined(DEBUG)
// Initialise the UART0 block for printf output
uart0Init(115200);
#endif
// Configure the multi-rate timer for 1ms ticks
mrtInit(__SYSTEM_CLOCK/1000);
/* Enable AHB clock to the Switch Matrix , UART0 , GPIO , IOCON, MRT , ACMP */
LPC_SYSCON->SYSAHBCLKCTRL |= (1 << 7) | (1 << 14) /*| (1 << 6)*//* | (1 << 18)*/
| (1 << 10) | (1 << 19);
// Configure the switch matrix (setup pins for UART0 and SPI)
configurePins();
#ifdef DEBUG
mrtDelay(100);
printf("Node Booted\r\n");
mrtDelay(100);
#endif
RFM69_init();
#ifdef ZOMBIE_MODE
//This is to allow the setup to recover from the initial boot and
// avoid a loop
RFM69_setMode(RFM69_MODE_SLEEP);
init_sleep();
sleepMicro(20000);
#endif
#ifdef DEBUG
printf("Node initialized, version %s\r\n",GIT_VER);
#endif
//Seed random number generator, we can use our 'unique' ID
random_output = NODE_ID[0] + NODE_ID[1] + NODE_ID[2];
while(1) {
/*
#ifdef ZOMBIE_MODE
adc_result = acmpVccEstimate();
// Before transmitting if the input V is too low we could sleep again
if (adc_result < 3100 || adc_result > 10000) {
sleepRadio();
}
#endif
*/
incrementPacketCount();
//Clear buffer
data_temp[0] = '\0';
uint8_t n;
//Create the packet
int int_temp;
#ifdef ZOMBIE_MODE
//This is to allow the setup to recover from the initial boot and
// avoid a loop
RFM69_setMode(RFM69_MODE_SLEEP);
init_sleep();
sleepMicro(10000);
#endif
int_temp = RFM69_readTemp(); // Read transmitter temperature
rx_rssi = RFM69_lastRssi();
// read the rssi threshold before re-sampling noise floor which will change it
rssi_threshold = RFM69_lastRssiThreshold();
floor_rssi = RFM69_sampleRssi();
#ifdef ZOMBIE_MODE
//This is to allow the setup to recover from the initial boot and
// avoid a loop
RFM69_setMode(RFM69_MODE_SLEEP);
init_sleep();
sleepMicro(10000);
#endif
#ifdef ZOMBIE_MODE
adc_result = acmpVccEstimate();
//sleepMicro(20000);
#endif
#ifdef DEBUG
printf("ADC: %d\r\n", adc_result);
#endif
#ifdef ZOMBIE_MODE
//This is to allow the setup to recover from the initial boot and
// avoid a loop
RFM69_setMode(RFM69_MODE_SLEEP);
init_sleep();
sleepMicro(10000);
#endif
if(data_count == 97) {
n = sprintf(data_temp, "%d%cL%s[%s]", NUM_REPEATS, data_count, LOCATION_STRING, NODE_ID);
}
else {
#ifdef DEBUG
//n = sprintf(data_temp, "%d%cT%dR%d,%dC%dX%d,%dV%d[%s]", NUM_REPEATS, data_count, int_temp, rx_rssi, floor_rssi, rx_packets, rx_restarts, rssi_threshold, adc_result, NODE_ID);
n = sprintf(data_temp, "%d%cT%dV%d[%s]", NUM_REPEATS, data_count, int_temp, adc_result, NODE_ID);
#elif defined(ZOMBIE_MODE)
n = sprintf(data_temp, "%d%cT%dV%d[%s]", NUM_REPEATS, data_count, int_temp, adc_result, NODE_ID);
#else
n = sprintf(data_temp, "%d%cT%dR%d[%s]", NUM_REPEATS, data_count, int_temp, rx_rssi, NODE_ID);
#endif
}
transmitData(n);
#ifdef ZOMBIE_MODE
sleepRadio();
#else
awaitData(TX_GAP);
#endif
}
}