File content as of revision 0:8c77f47060aa:

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/* 
The SDP connector is a 120 pin connector used on Analog Devices controller 
boards to interface with ADI evaluation boards, over 450 ADI evaluation boards 
utilise this connector, a list of these boards can be found at 
https://www.analog.com/en/design-center/evaluation-hardware-and-software/evaluation-development-platforms/sdp.html#Compatible-Boards.

The following is an example program showing how to initialise and use SDP 
connector peripherals (using SPI and GPIOs as an example) on the SDP-K1 in mbed.
Informtion on the pin name definitions for the SDP connector on the SDP-K1 can 
be found at https://os.mbed.com/platforms/SDP_K1/.
The full list of peripherals available on the SDP connector include GPIOs, 
Timers, SPI, I2C, and UART. For further information on how to enable these 
peripherals, consult the mbed documentation https://os.mbed.com/docs/mbed-os/v5.15/apis/drivers.html
*/
#include "mbed.h"
#include "platform/mbed_thread.h"
#include <bitset>
#include "FibonacciLFSR.h"
#include "FastPWM.h"

// Initialise the serial object with TX and RX pins
Serial pc(USBTX, USBRX);

// Initialise the digital pin 5 as a fast PWM output, prescaler set to 1
FastPWM fastpwm(D5,1);
 
 // Initialise LFSR random
FibonacciLFSR lfsr(FibonacciLFSR::LFSR_8);
      
// main() runs in its own thread in the OS
int main()
{   
    uint16_t lfsr_rand1, lfsr_rand2, lfsr_rand3;
    int lfsr_rand_test;
    uint32_t rando = rand();
    
    std::bitset<32> rand_bitset(rando);
    
    //pc.printf("System Core Clock: %d\r\n", SystemCoreClock);  
    //pc.printf("Random Number: %d\r\n", rando); 
       
    while(true){
        
        //fastpwm.period_ticks(4); // fast PWM allows period to be set in ticks of SystemCoreClock. 4 ticks = 45MHz on SDP-K1
        //fastpwm.pulsewidth_ticks(2); // duty cycle 50%
        
        fastpwm.period_ticks(18); // fast PWM allows period to be set in ticks of SystemCoreClock. 4 ticks = 45MHz on SDP-K1
        //fastpwm.pulsewidth_ticks(9);
        // cycle pulse width randomly
        for (int i = 0; i < 32; ++i) {
            if (rand_bitset.test(i))             
                fastpwm.pulsewidth_ticks(9);           
            else
                 fastpwm.pulsewidth_ticks(0);           
        }       
    }
}