#include "main.h"
void Timer_Init_Transmitter(void);
int main(void)
{
   RCC->ICSCR |= RCC_ICSCR_MSIRANGE_6;   // MSI 4.194 MHz enable
   Timer_Init_Transmitter();
   while(1)
   {
   }
}
void Timer_Init_Transmitter(void)
{
}

void Timer_Init_Transmitter (void)
{
   //Settings for GPIO PB6
   RCC->AHBENR |= RCC_AHBENR_GPIOBEN;             //GPIO port B clock enable
   GPIOB->MODER |= GPIO_MODER_MODER6_1;           //Alternative function mode enable
   GPIOB->OSPEEDR |= GPIO_OSPEEDER_OSPEEDR6_1;    //High speed
   GPIOB->AFR[0] |= 0x2000000;                    //Pin PB6 TIM4 alternative function AF2 enable
}

void Timer_Init_Transmitter (void)
{
   //Settings for GPIO PB6
   RCC->AHBENR |= RCC_AHBENR_GPIOBEN;             //GPIO port B clock enable
   GPIOB->MODER |= GPIO_MODER_MODER6_1;           //Alternative function mode enable
   GPIOB->OSPEEDR |= GPIO_OSPEEDER_OSPEEDR6_1;    //High speed
   GPIOB->AFR[0] |= 0x2000000;                    //Pin PB6 TIM4 alternative function AF2 enable
   //Settings for TIM4 - Slave
   RCC->APB1ENR |= RCC_APB1ENR_TIM4EN;            //TIM4 clock enable
   TIM4->PSC = 0;                                 //Prescaler value
   TIM4->ARR = 75;                                //Auto-reload value
   TIM4->CCR1 = 37;                               //Capture/Compare 1 value
   TIM4->CCMR1 |= TIM_CCMR1_OC1M_1 | TIM_CCMR1_OC1M_2; //Output compare PMW mode 1    enable
   TIM4->CCER |= TIM_CCER_CC1E;                   //OC3 signal is output on the corresponding output pin
   TIM4->SMCR |= TIM_SMCR_TS_0;                   //choosing ITR1
   TIM4->SMCR |= TIM_SMCR_SMS_0 | TIM_SMCR_SMS_2; //Gated Mode
   TIM4->CR1 |= TIM_CR1_CEN;                      //TIM4 enable
}

void Timer_Init_Transmitter (void)
{
   //Settings for GPIO PB6
   RCC->AHBENR |= RCC_AHBENR_GPIOBEN;             //GPIO port B clock enable
   GPIOB->MODER |= GPIO_MODER_MODER6_1;           //Alternative function mode enable
   GPIOB->OSPEEDR |= GPIO_OSPEEDER_OSPEEDR6_1;    //High speed
   GPIOB->AFR[0] |= 0x2000000;                    //Pin PB6 TIM4 alternative function AF2 enable
   //Settings for TIM4 - Slave
   RCC->APB1ENR |= RCC_APB1ENR_TIM4EN;            //TIM4 clock enable
   TIM4->PSC = 0;                                 //Prescaler value
   TIM4->ARR = 75;                                //Auto-reload value
   TIM4->CCR1 = 37;                               //Capture/Compare 1 value
   TIM4->CCMR1 |= TIM_CCMR1_OC1M_1 | TIM_CCMR1_OC1M_2; //Output compare PMW mode 1 enable
   TIM4->CCER |= TIM_CCER_CC1E;                   //OC3 signal is output on the corresponding output pin
   TIM4->SMCR &= ~TIM_SMCR_TS;                    //clear bits
   TIM4->SMCR |= TIM_SMCR_TS_0;                   //choosing ITR1
   TIM4->SMCR &= ~TIM_SMCR_SMS;                   //clear bits
   TIM4->SMCR |= TIM_SMCR_SMS_0 | TIM_SMCR_SMS_2; //Gated Mode
   TIM4->CR1 |= TIM_CR1_CEN;                      //TIM4 enable
   //Settings for TIM2 - Master
   RCC->APB1ENR |= RCC_APB1ENR_TIM2EN;            //TIM2 clock enable
   TIM2->PSC = 9;                                 //Prescaler value
   TIM2->ARR = 840;                               //Auto-reload value
   TIM2->CCR1 = 75;                               //Capture/Compare 1 value
   TIM2->CCMR1 |= TIM_CCMR1_OC1M_1 | TIM_CCMR1_OC1M_2; //Output compare PMW mode 1 enable
   TIM2->CR2 |= TIM_CR2_MMS_2;                    //OC1REF signal is used as trigger output (TRGO)
   TIM2->CR1 |= TIM_CR1_CEN;                      //TIM2 enable
}

#iclude "main.h"
void Timer_Init_Receiver(void);
int main(void)
{
   RCC->ICSCR |= RCC_ICSCR_MSIRANGE_6;    // MSI 4.194 MHz enable
   Timer_Init_Receiver();
   while(1)
   {
   }
}
void Timer_Init_Receiver(void)
{
}

void Timer_Init_Receiver(void)
{
//Settings for GPIO PB7
  RCC->AHBENR |= RCC_AHBENR_GPIOBEN;          // GPIO port B clock enable
  GPIOB->MODER |= GPIO_MODER_MODER7_1;        // Alternative function mode enable
  GPIOB->OSPEEDR |= GPIO_OSPEEDER_OSPEEDR7_1;  // High speed
  GPIOB->PUPDR |= GPIO_PUPDR_PUPDR7_0;        // pull-up PB7
  GPIOB->AFR[0] |= 0x20000000;                // Pin PB7 TIM4 alternative function AF2 enable
}

void Timer_Init_Receiver(void)
{
//Settings for GPIO PB7
  RCC->AHBENR |= RCC_AHBENR_GPIOBEN;           // GPIO port B clock enable
  GPIOB->MODER |= GPIO_MODER_MODER7_1;         // Alternative function mode enable
  GPIOB->OSPEEDR |= GPIO_OSPEEDER_OSPEEDR7_1;  // High speed
  GPIOB->PUPDR |= GPIO_PUPDR_PUPDR7_0;         // pull-up PB7
  GPIOB->AFR[0] |= 0x20000000;                 // Pin PB7 TIM4 alternative function AF2 enable
  //Settings for TIM4
  RCC->APB1ENR |= RCC_APB1ENR_TIM4EN;          // TIM4 clock enable
TIM4->PSC = 9;                                 // Prescaler value
TIM4->ARR = 4200;                              // Auto-reload value
TIM4->CCR2 = 4200;                             // Capture/Compare 2 value
  TIM4->CCMR1 &= ~TIM_CCMR1_OC2M;              // Frozen mode enable
  TIM4->CCMR1 &= ~TIM_CCMR1_CC2S;              // Output mode
  TIM4->CCER &= ~TIM_CCER_CC2NP;               // This bit is used in conjunction with CC2P.
  TIM4->CCER |= TIM_CCER_CC2P;                 // Inverted/falling edge
  TIM4->SMCR |= TIM_SMCR_TS_1 | TIM_SMCR_TS_2; // Choosing TI2FP2
  TIM4->SMCR |= TIM_SMCR_SMS_2;                // Reset mode
  TIM4->DIER |= TIM_DIER_CC2IE;                // Capture/Compare 2 interrupt enable
  TIM4->CR1 |= TIM_CR1_CEN;                    // TIM4 enable
  NVIC_EnableIRQ(TIM4_IRQn);                   // TIM4 global Interrupt enable
}

void TIM4_IRQHandler(void)
{
  TIM4->SR &= ~TIM_SR_CC2IF;
  GPIOB->ODR |= GPIO_ODR_ODR_15;  // Led red on
}

void Timer_Init_Transmitter(void);
int main(void)
{
   RCC->ICSCR |= RCC_ICSCR_MSIRANGE_6;             // MSI 4.194 MHz enable
   Timer_Init_Transmitter();
   while(1)
   {
   }
}
void Timer_Init_Transmitter(void)
{
  //Settings for GPIO PB6
   RCC->AHBENR |= RCC_AHBENR_GPIOBEN;             //GPIO port B clock enable
   GPIOB->MODER |= GPIO_MODER_MODER6_1;           //Alternative function mode enable
   GPIOB->OSPEEDR |= GPIO_OSPEEDER_OSPEEDR6_1;    //High speed
   GPIOB->AFR[0] |= 0x2000000;                    //Pin PB6 TIM4 alternative function AF2 enable
   //Settings for TIM4 - Slave
   RCC->APB1ENR |= RCC_APB1ENR_TIM4EN;            //TIM4 clock enable
   TIM4->PSC = 0;                                 //Prescaler value
   TIM4->ARR = 75;                                //Auto-reload value
   TIM4->CCR1 = 37;                               //Capture/Compare 1 value
   TIM4->CCMR1 |= TIM_CCMR1_OC1M_1 | TIM_CCMR1_OC1M_2; //Output compare PMW mode 1 enable
   TIM4->CCER |= TIM_CCER_CC1E;                   //OC3 signal is output on the corresponding output pin
   TIM4->SMCR &= ~TIM_SMCR_TS;                    //clear bits
   TIM4->SMCR |= TIM_SMCR_TS_0;                   //choosing ITR1
   TIM4->SMCR &= ~TIM_SMCR_SMS;                   //clear bits
   TIM4->SMCR |= TIM_SMCR_SMS_0 | TIM_SMCR_SMS_2; //Gated Mode
   TIM4->CR1 |= TIM_CR1_CEN;                      //TIM4 enable
   //Settings for TIM2 - Master
   RCC->APB1ENR |= RCC_APB1ENR_TIM2EN;            //TIM2 clock enable
   TIM2->PSC = 9;                                 //Prescaler value
   TIM2->ARR = 840;                               //Auto-reload value
   TIM2->CCR1 = 75;                               //Capture/Compare 1 value
   TIM2->CCMR1 |= TIM_CCMR1_OC1M_1 | TIM_CCMR1_OC1M_2; //Output compare PMW mode 1 enable
   TIM2->CR2 |= TIM_CR2_MMS_2;                    //OC1REF signal is used as trigger output (TRGO)
   TIM2->CR1 |= TIM_CR1_CEN;                      //TIM2 enable
}

#include “main.h”
void Timer_Init_Receiver(void);
int main(void)
{
   RCC->ICSCR |= RCC_ICSCR_MSIRANGE_6;         // MSI 4.194 MHz enable
  GPIOB->MODER |= GPIO_MODER_MODER15_0;        // PB15 output mode
   Timer_Init_Receiver();
   while(1)
   {
   }
}
void Timer_Init_Receiver(void)
{
//Settings for GPIO PB7
  RCC->AHBENR |= RCC_AHBENR_GPIOBEN;           // GPIO port B clock enable
  GPIOB->MODER |= GPIO_MODER_MODER7_1;         // Alternative function mode enable
  GPIOB->OSPEEDR |= GPIO_OSPEEDER_OSPEEDR7_1;  // High speed
  GPIOB->PUPDR |= GPIO_PUPDR_PUPDR7_0;         // pull-up PB7
  GPIOB->AFR[0] |= 0x20000000;                 // Pin PB7 TIM4 alternative function AF2 enable
  //Settings for TIM4
  RCC->APB1ENR |= RCC_APB1ENR_TIM4EN;          // TIM4 clock enable
TIM4->PSC = 9;                                 // Prescaler value
TIM4->ARR = 4200;                              // Auto-reload value
TIM4->CCR2 = 4200;                             // Capture/Compare 2 value
  TIM4->CCMR1 &= ~TIM_CCMR1_OC2M;              // Frozen mode enable
  TIM4->CCMR1 &= ~TIM_CCMR1_CC2S;              // Output mode
  TIM4->CCER &= ~TIM_CCER_CC2NP;               // This bit is used in conjunction with CC2P.
  TIM4->CCER |= TIM_CCER_CC2P;                 // Inverted/falling edge
  TIM4->SMCR |= TIM_SMCR_TS_1 | TIM_SMCR_TS_2; // Choosing TI2FP2
  TIM4->SMCR |= TIM_SMCR_SMS_2;                // Reset mode
  TIM4->DIER |= TIM_DIER_CC2IE;                // Capture/Compare 2 interrupt enable
  TIM4->CR1 |= TIM_CR1_CEN;                    // TIM4 enable
  NVIC_EnableIRQ(TIM4_IRQn);                   // TIM4 global Interrupt enable
}
void TIM4_IRQHandler(void)
{
  TIM4->SR &= ~TIM_SR_CC2IF;
  GPIOB->ODR |= GPIO_ODR_ODR_15;               // Led red on
}

void TIM4_IRQHandler(void)
{
  if (StatusDiode == 0)
  {
      TIM4->SR &= ~TIM_SR_TIF;
      GPIOB->ODR |= GPIO_ODR_ODR_15;         // Led red on
      TIM4->DIER &= ~TIM_DIER_TIE;           // Trigger interrupt disable
      TIM4->DIER |= TIM_DIER_CC2IE;          // Capture/Compare 2 interrupt enable
      TIM4->CNT = 0;
      StatusDiode = 1;
  }
  else
  {
      TIM4->SR &= ~TIM_SR_CC2IF;
      GPIOB->ODR &= ~GPIO_ODR_ODR_15;        // Led red off
      TIM4->DIER &= ~TIM_DIER_CC2IE;         // Capture/Compare 2 interrupt disable
      TIM4->DIER |= TIM_DIER_TIE;            // Trigger interrupt enable
      StatusDiode = 0;
  }
}

#include “main.h”
void Timer_Init_Receiver(void);
int main(void)
{
   RCC->ICSCR |= RCC_ICSCR_MSIRANGE_6;      // MSI 4.194 MHz enable
  GPIOB->MODER |= GPIO_MODER_MODER15_0;     // PB15 output mode
   Timer_Init_Receiver();
   while(1)
   {
   }
}
void Timer_Init_Receiver(void)
{
//Settings for GPIO PB7
  RCC->AHBENR |= RCC_AHBENR_GPIOBEN;           // GPIO port B clock enable
  GPIOB->MODER |= GPIO_MODER_MODER7_1;         // Alternative function mode enable
  GPIOB->OSPEEDR |= GPIO_OSPEEDER_OSPEEDR7_1;  // High speed
  GPIOB->PUPDR |= GPIO_PUPDR_PUPDR7_0;         // pull-up PB7
  GPIOB->AFR[0] |= 0x20000000;                 // Pin PB7 TIM4 alternative function AF2 enable
  //Settings for TIM4
  RCC->APB1ENR |= RCC_APB1ENR_TIM4EN;          // TIM4 clock enable
TIM4->PSC = 9;                                 // Prescaler value
TIM4->ARR = 4200;                              // Auto-reload value
TIM4->CCR2 = 4200;                             // Capture/Compare 2 value
  TIM4->CCMR1 &= ~TIM_CCMR1_OC2M;              // Frozen mode enable
  TIM4->CCMR1 &= ~TIM_CCMR1_CC2S;              // Output mode
  TIM4->CCER &= ~TIM_CCER_CC2NP;               // This bit is used in conjunction with CC2P.
  TIM4->CCER |= TIM_CCER_CC2P;                 // Inverted/falling edge
  TIM4->SMCR |= TIM_SMCR_TS_1 | TIM_SMCR_TS_2; // Choosing TI2FP2
  TIM4->SMCR |= TIM_SMCR_SMS_2;                // Reset mode
  TIM4->DIER |= TIM_DIER_TIE;                  // Trigger interrupt enable
  TIM4->CR1 |= TIM_CR1_CEN;                    // TIM4 enable
  NVIC_EnableIRQ(TIM4_IRQn);                   // TIM4 global Interrupt enable
}
void TIM4_IRQHandler(void)
{
  if (StatusDiode == 0)
  {
      TIM4->SR &= ~TIM_SR_TIF;
      GPIOB->ODR |= GPIO_ODR_ODR_15;           // Led red on
      TIM4->DIER &= ~TIM_DIER_TIE;             // Trigger interrupt disable
      TIM4->DIER |= TIM_DIER_CC2IE;            // Capture/Compare 2 interrupt enable
      TIM4->CNT = 0;
      StatusDiode = 1;
  }
  else
  {
      TIM4->SR &= ~TIM_SR_CC2IF;
      GPIOB->ODR &= ~GPIO_ODR_ODR_15;          // Led red off
      TIM4->DIER &= ~TIM_DIER_CC2IE;           // Capture/Compare 2 interrupt disable
      TIM4->DIER |= TIM_DIER_TIE;              // Trigger interrupt enable
      StatusDiode = 0;
  }
}