File content as of revision 10:d46390b7aa64:
/*******************************************************************************
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*******************************************************************************
This is code for the MAX1472 RF Transmitter EV-Kit. This program will record a
temperature fom the MAX30208 EV-Kit, encrypt the data using the user-generated
Symmetric key, apply forward error correction (FEC) encoding, and then send the
message via the MAX1472 transmitter.
Hardware Setup and connections:
MAX32630FTHR-> MAX1472 Ev-Kit
3.3V -> VDD
GND -> VSS
P3_1 -> Data_In
P5_2 -> ENABLE
*******************************************************************************
MAX32630FTHR-> MAX30208 Ev-Kit
1.8V -> VIN
GND -> GND
P3_4 -> SDA
P3_5 -> SCL
*******************************************************************************
*/
#include "mbed.h"
#include "max32630fthr.h"
#include "USBSerial.h"
#include "MAX30208.h"
#include "ForwardErrCorr.h"
MAX32630FTHR pegasus(MAX32630FTHR::VIO_3V3);
//UART Port for Sending data
RawSerial uart(P3_1,P3_0);//tx,rx
I2C i2c(P3_4, P3_5); //sda,scl
MAX30208 TempSensor(i2c, 0x50); //Temperature Sensor Object for reading temperature data
#define SymmetricKey "RfIsCoOl" //Set Symmetric Key here -- Make sure it is identical to receiver
char TransTable[] = {0x1F,0x18,0x06,0x01}; //Used to translate data for FEC -- Make sure it is identical to receiver
Translator transTx(SymmetricKey, TransTable); //Initialize Encoder
DigitalOut rLED(LED1);
DigitalOut gLED(LED2);
DigitalOut bLED(LED3);
DigitalIn sw1(SW1); //Trigger for sending data
DigitalOut Enable(P5_2); //Enable Transmitter
char DEVICETYPE = 'T'; //Set Device Type
char DEVICEID = 0x01; //Set the Device ID
//******************************************************************************
/**
* @brief Record and read temperature from MAX30208
* @param TempSensor - Refrence to MAX30208 temp sensor object
* @param &value[OUT]- Address to store read temperature at
* @return 0 on success, 1 on failure due to improper data record or read
*/
int ReadData(MAX30208 TempSensor, uint16_t &value){
if (TempSensor.takeDataMeasurment() != 0){
printf("Error Taking data Meaurment\r\n");
return(1);
}
wait_ms(50); //max temp record time is 50ms
if (TempSensor.readData(value) !=0){
printf("Error reading temperature Data\r\n");
return(1);
}
return(0);
}
//******************************************************************************
/*
* @brief Begin Communication with warm up bytes and device type/id
*/
void comInit(Translator trans){
uart.putc(0xFF); //Initializer bytes to "warm-up" the Peak Detector cicuitry of MAX1473 Receiver
uart.putc(0xFF);
uart.putc(0x00);
uart.putc('b'); //Packet start character
uart.putc(DEVICETYPE); //Send Device Type
uart.putc(DEVICEID); //Send Device ID
}
//******************************************************************************
/**
* @brief Send data and end transmission
* @param EncryptedData[IN] - 8 bytes of encryted data to send via UART connection
*/
void comData(char *EncryptedData){
for(int i=0;i<8;i++){
uart.putc(EncryptedData[i]); //Send all of the encrypted data
}
uart.putc('c'); //End of packet character
uart.send_break();
}
//******************************************************************************
int main()
{
wait(1);
uart.baud(9600);
printf("Starting Transmitter Program\r\n\r\n");
rLED = LED_ON;
gLED = LED_ON;
bLED = LED_OFF;
rLED = LED_OFF;
//Start MAX30208 temperature sensor in factor default
TempSensor.resetDevice();
//Turn off Transmitter
Enable = 0;
while(1) {
//Record a temperature and send the encrypted data each time the on-board button is pressed
if(sw1==0){
//Enable Transmitter
Enable = 1;
//Read a new temperature
uint16_t tempData;
if(ReadData(TempSensor,tempData) !=0){
printf("Error reading data!\r\n");
}
//Encrypt Temperature Data
char EncryptedData[8];
printf("Original Data: %i\r\n", tempData);
transTx.Encrypt(tempData,EncryptedData);
printf("Encrypted Data:\r\n");
for(int i=0;i<8;i++){
printf("%c ",EncryptedData[i]);
}
printf("\r\n\r\n");
//Initialize Communication
comInit(transTx);
//Send Encrypted Data
comData(EncryptedData);
//Turn off Transmitter
Enable = 0;
wait_ms(500); //button debounce
}//if
}//while
}//main
