Dheeraj M Pai
ADF7023 with Explanations
Diff: main.cpp
- Revision:
- 0:77ff72005133
diff -r 000000000000 -r 77ff72005133 main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Wed Aug 05 11:19:48 2015 +0000
@@ -0,0 +1,239 @@
+#include "mbed.h" //mbed Library
+#include <iostream>
+using namespace std;
+#include <bitset>
+
+#define ENDL "\r" << endl;
+#define START_ADDRESS 0x020;
+
+//SPI
+
+SPI adf(PTD6, PTD7, PTD5); //SPI Pin names in mbed
+ //MOSI, MISO, CLOCK
+
+DigitalOut CS(D10); //CS = chip select or slave select
+Serial PC(USBTX, USBRX); //Serial Connection to PC Through USB port
+DigitalOut ledr(LED_RED); //Blinking of LED for confirming the compilation of code
+
+DigitalIn clk(D8); //DigitalIn is used to poll the value of the clock
+DigitalOut DT(D9); //Declaration of the pin
+
+int j=0; //Variable counting the bytes transmitted
+
+#define SPI_NOP 0xFF
+
+//Data that is to be transmitted
+unsigned char data_TX [] = {0x65,0xD3,0x06,0x08,0xBB,0xE7,0xCD,0x16,0x65,0xD3,0x06,0x08,0xBB,0xE7,0xCD,0x16,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0x20,0xE5,0xEE,0x00,0xEB,0x3D,0x35,0x66,0xDC,0xDA,0x33,0xA1,0x80,0x62,0xB7,0xB8,0x88,0x8A,0xCE,0x99,0x18,0xFA,0x24,0x42,0xD1,0x7C,0x2D,0x0E,0x72,0x9E,0xE9,0x7C,0xF9,0xBA,0x18,0xAA,0x4B,0xEC,0x7C,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0x20,0xE5,0xEE,0x00,0xCC,0xB3,0xB2,0x5B,0x96,0x38,0x71,0x96,0x54,0xE2,0x4A,0x7F,0xC9,0xB7,0x1E,0x56,0x09,0x30,0x18,0x5A,0x84,0xFA,0xC1,0x9D,0xA6,0x6A,0x17,0x50,0x6F,0xD4,0x34,0x1D,0xF0,0xE0,0xE2,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0x20,0xE5,0xEE,0x00,0x78,0xC9,0x9A,0x09,0xE2,0x34,0xF9,0x39,0x61,0x36,0x9C,0xC2,0x98,0xB9,0x54,0xC0,0xDC,0xE6,0x90,0xF6,0xF6,0x88,0xD1,0xA5,0x5A,0x75,0x83,0x78,0x08,0xD6,0x9D,0xDE,0xB8,0x58,0xD4,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0x20,0xE5,0xEE,0x00,0x13,0x3F,0x78,0xD9,0x4E,0xB7,0xE8,0xD6,0x0D,0x1E,0xF1,0xC4,0xB9,0xAB,0x90,0x39,0x6A,0x9E,0x8A,0xB8,0xC9,0xAF,0x5E,0x85,0x66,0xBF,0x4E,0xB3,0xD3,0x54,0x9B,0x7D,0xA3,0x3A,0x1A,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0x20,0xE5,0xEE,0x00,0x81,0x83,0x7B,0x88,0x8A,0xAB,0x31,0x91,0x8F,0xA0,0x91,0x05,0x17,0xC2,0xD2,0xB9,0xC1,0xEE,0x97,0xCE,0x66,0xE9,0x8A,0xA4,0xBC,0xB1,0xFC,0xCB,0x3B,0x24,0x6E,0x5B,0x87,0x19,0x64,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x97,0x4C,0x18,0x22,0xEF,0x9F,0x34,0x59,0x97,0x4C,0x18,0x22,0xEF,0x9F,0x34,0x58,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x97,0x4C,0x18,0x22,0xEF,0x9F,0x34,0x59,0x97,0x4C,0x18,0x22,0xEF,0x9F,0x34,0x58,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+
+
+//Note : A delay of 2 microseconds is given to ensure ADF7023 detects the CS = 'High' state and execute the command given.
+//wait_us(2); ensures delay of 2 microseconds
+
+
+
+void send_data()
+ {
+
+
+ static int current_bit = 7;
+
+ DT = (data_TX[j] >> current_bit) & 1; //if current bit == 1 then DT = High else DT = Low
+ --current_bit; //Next Bit
+
+ if(current_bit == -1){ //If all 8 bits are transmitted. then go to next byte
+ current_bit = 7; //Going to the bit [0]
+ j++;
+
+
+ if(j>=sizeof(data_TX))
+ {
+// j=0; // In case repeatation of data is required
+ adf.write(0xB1); // Stops transmitting and reaches PHY_ON State (when repeatation is not required)
+ }
+ }
+}
+
+
+
+
+//BBRAM Sequence
+//
+
+void write_bbram_sequence(void){
+
+ adf.write(0x19); //SPI_MEM_WR SPI Block Write BBRAM
+ adf.write(0x00); //Starting Address (0x100)
+ adf.write(0x00); //Data on 0x100 -- Interrupt_Mask Register -- As no Interrupt is required Value == 0x00
+ adf.write(0x00); //Interrupt_Mask_1 No interrupts Required
+
+ adf.write(0x00); // For details of other registers Please refer page 90-100 in ADF7023 Datasheet
+ adf.write(0x00);
+ adf.write(0x00);
+ adf.write(0x00);
+
+ adf.write(0x00);
+ adf.write(0x33);
+ adf.write(0x00);
+ adf.write(0xF9); //BBRAm Register Corresponding to the frequency
+
+ adf.write(0xC2);
+ adf.write(0x10);
+ adf.write(0xC0);
+ adf.write(0x00);
+
+ adf.write(0x30);
+ adf.write(0x31);
+ adf.write(0x07);
+ adf.write(0x00);
+
+ adf.write(0x01);
+ adf.write(0x00);
+ adf.write(0x7F);
+ adf.write(0x00);
+
+ adf.write(0x0B);
+ adf.write(0x37);
+ adf.write(0x00);
+ adf.write(0x00);
+ adf.write(0x40);
+ adf.write(0x0C);
+ adf.write(0x00);
+ adf.write(0x05);
+ adf.write(0x00);
+ adf.write(0x00);
+ adf.write(0x18);
+ adf.write(0x12);
+ adf.write(0x34);
+ adf.write(0x56);
+ adf.write(0x10);
+ adf.write(0x10);
+ adf.write(0x08);
+ adf.write(0x14);
+ adf.write(0x00);
+ adf.write(0x00);
+ adf.write(0x00);
+ adf.write(0x00);
+ adf.write(0x00);
+ adf.write(0x00);
+ adf.write(0x00);
+ adf.write(0x00);
+ adf.write(0x00);
+ adf.write(0x00);
+ adf.write(0x00);
+ adf.write(0x00);
+ adf.write(0x00);
+ adf.write(0x00);
+ adf.write(0x00);
+ adf.write(0x00);
+ adf.write(0x00);
+ adf.write(0x00);
+ adf.write(0x04);
+ adf.write(0x00);
+ adf.write(0x00);
+ adf.write(0x00);
+ adf.write(0x00);
+ adf.write(0x00);
+
+ }
+
+ void initiate(void){
+
+ CS=0; //ADF023 and mbed SPI is active low and ADF7023 samples at rising edge mode = 0;
+ adf.write(0x1B);
+ adf.write(0xFA);
+ adf.write(0xA0);
+ CS=1; // SPI goes to High impedence State
+ wait_us(2);
+
+ CS=0; //Chip Select = low implies Chip is selected SPI is enabled
+ adf.write(0x18);
+ adf.write(0x0D);
+ adf.write(0x00);
+ CS=1; //Chip select == high . Chip goes to High impedence state
+ wait_us(2);
+
+// ADF7023 is now configured to SPORT MODE
+
+ CS=0;
+ adf.write(0xB0); //In order to write BBRAM Sequence we need to change the state to PHY_OFF state
+ CS=1;
+ wait_us(600);
+
+ CS=0;
+ write_bbram_sequence(); //BBRAM_SEQUENCE Contains all data that is required to configure the Radio
+ CS=1;
+ wait_us(2);
+
+ CS=0;
+ adf.write(0xFF); //0xFF is the Dummy Byte Provides required time for ADF to get ready to accept command
+ adf.write(0xFF);
+ CS=1;
+ wait_us(2);
+
+ CS=0;
+ adf.write(0xFF);
+ adf.write(0xFF);
+ CS=1;
+ wait_us(2);
+
+
+ CS=0;
+ adf.write(0xBB);// CONFIGURE_DEV Configures the radio according to the bbram Sequence Except the transmission frequency
+ CS=1;
+ wait_us(2); // Approx time required for state transition
+
+ CS=0;
+ adf.write(0xB1);//PHY_ON Turns on the radio
+ CS=1;
+ wait_us(2);
+
+ CS=0;
+ adf.write(0xB5);//PHY_TX Sets Transmission Frequency according to bbram and starts transmitting
+ CS=1;
+ wait_us(600); //Maximum time required for ADF7023 for the above State transmission . Tested in Space Lab condition
+ }
+
+
+
+
+int main(){
+
+
+ CS = 1; // Chip Select == low Enabling the SPI
+ adf.format(8,0); // SPI interfaces in 8 bit pattern ,SPI Mode = 0
+ adf.frequency( 1000000 ); // SPI Frequency = 1 MHz
+
+ cout << "Press s" << ENDL; // The following code upto 6 lines are used to ensure the data is transmitted at the required time
+ ledr = 1;
+ char c = 'a'; //Initialising the variable
+
+ while( c != 's'){
+ c = PC.getc();
+ PC.putc(c);
+ }
+ ledr = 0;
+
+ initiate(); // Initiates the Radio to Sport Mode and starts transmitting
+
+ int state; // The datarate in which we are testing is half the Clockrate
+ // We are using the variable 'state' to ensure the data is sampled in alternative rising edge
+
+ if(clk == 0){ // Initialising the State of the clock
+ state = 0;
+ }
+ else{
+ state = 1;
+ }
+
+ while(true){ // Polling
+ if(clk == 0){
+ if(state == 1){
+ state = 0;
+ send_data();
+ }
+ }
+ else{ //As data is sampled in alternating rising edge in ADF7023 this ensures that the Data changes accordingly
+ state = 1;
+ }
+ }
+}
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