// Insert compiler directives to set optimization to zero
// We do not want the compiler to optimize out any code
#pragma GCC push_options
#pragma GCC optimize("O0")

//Include header file.
//IN STM32 microcontroller programming, the header files provided by the
//manufacture (STmicroelectronics) contain the neccessary definitions,
//constants, and function phototypesmspecific to the microcontrollers peripherals
//and features
#include "stm32c0xx.h"
#include "myUARTconfig.h"
#include "myReadBusFrequencies.h"
#include "stdio.h"
#include "mySysTick.h"
#include "myClockConfig.h"
#include "myADCconfig.h"

// Set variables for the ADC
unsigned int adcval;
float Vin;
// Set the variable to hold the analogue voltage represented as a string
char Vin_string[];

//set variables to contain Bus Frequencies
unsigned int SYSCLK;
unsigned int HCLK;
unsigned int APBCLK;


int main(void)
{
  //FOR LEDS ON BREADBOARD
  RCC-> IOPENR |= (1UL << 1);
  // Configure PB2 to PB9 as output pins
  GPIOB ->MODER = 0x5555550;

  //Enable the GPIOB Peripheral
  RCC->IOPENR |= (1UL << 3);

 //Configure PDO 
  GPIOD->MODER &=~ (3UL);//CLEAR BITS 1 AND O
  GPIOD-> MODER |= (1UL << 4);

  //Configure the bus frequencies according to settings in the myClockConfig
  SystemClock_config();

  //Configure the UART for Serial communications on UART2
  myUARTconfig();

  //Configure the ADC according to the settings in the myADCconfig.c file
  configADCpins();
  initADC();

 //Read bus frequencies

  SYSCLK = GetSYSCLK();
  HCLK = GetHCLKFreq();
  APBCLK = GetPCLKFreq();
  
  printf("SYSCLK:%dHz, HCLK:%dHz, APBCLK:%dHz\n", SYSCLK, HCLK, APBCLK);

while(1)
{
  //Toggle the state of PD0
  GPIOD -> ODR ^= (1UL);
  
  //Read the ADC value
  adcval = readADC();
  //Send it to the LEDS on GPIOB (PB2 to PB9)
  GPIOB->ODR = (adcval << 2); //starts from PB2 - PB9

  //Calculate the anol input voltage read by the potentiometer
  Vin = (adcval * 3.3) / 4095; // 4095 = 2^12

  // dtostr(float_value, min_width, num_digits_after_decimal, where_to_store_string)
  dtostrf(Vin, 4, 3, Vin_string );

  print("The analogue voltage is %s volts\n", Vin_string);

  // call a 1 second delay
  myDelay(1000);

  
}

}