#pragma GCC push_options
#pragma GCC optimize ("O0")

#include "stm32c0xx.h"
#include "myClockConfig.h"
#include "mySysTick.h"
#include "myADCconfig.h"
#include "myReadBusFrequencies.h"
#include "myUARTconfig.h"
#include "stdio.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 the BUS frequencies

unsigned int SYSCLK;
unsigned int HCLK;
unsigned int APBCLK;


int main(void)

{
  // Enable the GPIOB peripheral
  RCC -> IOPENR |= (1UL << 1);
  // Configure PB2 to PB9 as output pins
  GPIOB ->MODER = 0x5555550;

  //Enable the GPIOD peripheral
  RCC -> IOPENR |= (1UL << 3);
  //Configure PD2 as an output pin
  GPIOD ->MODER = (1UL << 4);



  //Configure the bus frequqncies according to the settings in the myClockConfig.c file
  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 the BUS frequencies

  SYSCLK = GetSYSCLK();
  HCLK = GetHCLKFreq();
  APBCLK = GetPCLKFreq();

  printf("SYSCLK:%dHz, HCLK:%dHz, APBCLK:%dHz\n", SYSCLK, HCLK, APBCLK);

  while (1)
  {
    //Read the ADC value
    adcval = readADC();
    //Send it to the LEDS on GPIOB (PB2 to PB13)
    GPIOB->ODR = (adcval << 2);

    // Calculate the analogue input voltage read by the potentiometer
    Vin = (adcval * 3.3) / 63;

    //Because STM32C031C6 does not have a Floating Point Unit (FPU) and the "printf"
    //function limitations within the context of the embedded environment, floating point
    //numbers cannot be printed. Therefore the floating point number has to first be
    //converted into a string before being printed via the USART. The function below
    //allows for the conversion of the float to a string.

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

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

     

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


  }


}