// STM32 Nucleo-L031K6 HAL Blink + printf() example
// Simulation: https://wokwi.com/projects/367244067477216257

#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <stm32l0xx_hal.h>

#define delay 1
#define delayc 1
//#define delayseg 10
// ST Nucleo Green user LED (PB3)
#define LED_PORT                 GPIOB
#define LED_PORT1                GPIOA

#define LED_PIN                 GPIO_PIN_3
#define LED_PIN1                GPIO_PIN_4
#define LED_PIN2                GPIO_PIN_5
#define LED_PIN3                GPIO_PIN_11
#define LED_PIN4                GPIO_PIN_8
#define LED_PIN5                GPIO_PIN_1
#define LED_PIN6                GPIO_PIN_6
//////////////////////////////////////////////////
#define LED_PIN7                GPIO_PIN_0  ////D3
#define LED_PIN8                GPIO_PIN_7  ////D4
#define LED_PIN9                GPIO_PIN_12 ////D2
#define LED_PIN10                GPIO_PIN_0 //////anlog a0 port a for output for dig1

#define LED_PORT_CLK_ENABLE     __HAL_RCC_GPIOB_CLK_ENABLE
#define LED_PORT1_CLK_ENABLE     __HAL_RCC_GPIOA_CLK_ENABLE

#define VCP_TX_Pin GPIO_PIN_2
#define VCP_RX_Pin GPIO_PIN_15

int i,dig1,dig2,dig3,dig4; 

uint32_t previousMillis,previousMillis1;
#define interval 300
 
UART_HandleTypeDef huart2;

void SystemClock_Config(void);
static void MX_USART2_UART_Init(void);

static void MX_TIM2_Init(void);

TIM_HandleTypeDef htim2;

void splitmath(){
	 dig1 = i/1000;
   dig2 = ((i/100)%10);
	 dig3 = ((i/10)%10); 
	 dig4 = (i%10); 
}
void osSystickHandler(void)
{
}

void initGPIO()
{
  GPIO_InitTypeDef GPIO_Config;
  LED_PORT_CLK_ENABLE();
  LED_PORT1_CLK_ENABLE();
///////////////////////////////////////////// port B
  GPIO_Config.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_Config.Pull = GPIO_NOPULL;
  GPIO_Config.Speed = GPIO_SPEED_FREQ_HIGH;
  GPIO_Config.Pin = LED_PIN | LED_PIN1 | LED_PIN2 | LED_PIN5
                   | LED_PIN6 | LED_PIN7 | LED_PIN7 | LED_PIN8;
  HAL_GPIO_Init(LED_PORT, &GPIO_Config);
///////////////////////////////////////////// port A
    GPIO_Config.Pin = LED_PIN3 | LED_PIN4 |LED_PIN9 | LED_PIN10;
    HAL_GPIO_Init(LED_PORT1, &GPIO_Config);
//////////////////////////////////////////// input config 
}
int segmentNumber[10] = {
        0x3f,  // formate for 7 segnment send in hex from bin
        0x06,  
        0x5b,  
        0x4f,  
        0x66,  
        0x6d,  
        0x7d,  
        0x07,  
        0x7f,  
        0x67   
};
void Sevensegment(int i){
	HAL_GPIO_WritePin(LED_PORT, LED_PIN, ((i>>0)&0x01));
	HAL_GPIO_WritePin(LED_PORT, LED_PIN1, ((i>>1)&0x01));
	HAL_GPIO_WritePin(LED_PORT, LED_PIN2, ((i>>2)&0x01));
	HAL_GPIO_WritePin(LED_PORT1, LED_PIN3, ((i>>3)&0x01));
	HAL_GPIO_WritePin(LED_PORT1, LED_PIN4, ((i>>4)&0x01));
	HAL_GPIO_WritePin(LED_PORT, LED_PIN6, ((i>>5)&0x01));
	HAL_GPIO_WritePin(LED_PORT, LED_PIN5, ((i>>6)&0x01));
}

int main(void)
{
  HAL_Init();
  SystemClock_Config();

  initGPIO();
  MX_USART2_UART_Init();
  MX_TIM2_Init();
 // printf("Hello, %s!\n", "world");
 //HAL_GPIO_TogglePin(LED_PORT, LED_PIN);
  while (1){
    
    if (HAL_GetTick()- previousMillis >= interval){
    // save the last time you blinked the LED
// printf("millis :%d\n",HAL_GetTick());
    previousMillis =  HAL_GetTick();

    if(i>=0){
      i++;
}
      else{
      i--;
}
    if(i==9999){
      i=0;
    }
} 
	      dig1 = i/1000;
        dig2 = ((i/100)%10);
	      dig3 = ((i/10)%10); 
	      dig4 = (i%10); 

if (HAL_GetTick()- previousMillis1 >= interval){
    printf("Number: %d\n", i);
    previousMillis1 =  HAL_GetTick();
    }
 	  Sevensegment(segmentNumber[dig1]);
    HAL_GPIO_WritePin(LED_PORT1, LED_PIN10, GPIO_PIN_RESET);///a0
	  HAL_Delay(delay);
    HAL_GPIO_WritePin(LED_PORT1, LED_PIN10, GPIO_PIN_SET);//a0

	  Sevensegment(segmentNumber[dig2]);
	  HAL_GPIO_WritePin(LED_PORT, LED_PIN8, GPIO_PIN_RESET);////d4
	  HAL_Delay(delay);
	  HAL_GPIO_WritePin(LED_PORT, LED_PIN8, GPIO_PIN_SET);////d4

	  Sevensegment(segmentNumber[dig3]);
	  HAL_GPIO_WritePin(LED_PORT, LED_PIN7, GPIO_PIN_RESET);///d3
	  HAL_Delay(delay);
	  HAL_GPIO_WritePin(LED_PORT, LED_PIN7, GPIO_PIN_SET);///d3

	  Sevensegment(segmentNumber[dig4]);
	  HAL_GPIO_WritePin(LED_PORT1, LED_PIN9, GPIO_PIN_RESET);//d2
	  HAL_Delay(delay);
	  HAL_GPIO_WritePin(LED_PORT1, LED_PIN9, GPIO_PIN_SET);//d2
  //}
    /*  
    //for(i=98;i>=1;i--){
    //HAL_Delay(300);
	   dig1 = i/1000;
     dig2 = ((i/100)%10);
	   dig3 = ((i/10)%10); 
	   dig4 = (i%10); 
      printf("R Number: %d\n", i);
      
 	  Sevensegment(segmentNumber[dig1]);

    HAL_GPIO_WritePin(LED_PORT1, LED_PIN10, GPIO_PIN_RESET);///a0
	  HAL_Delay(delay);
    HAL_GPIO_WritePin(LED_PORT1, LED_PIN10, GPIO_PIN_SET);//a0

	  Sevensegment(segmentNumber[dig2]);
	  HAL_GPIO_WritePin(LED_PORT, LED_PIN8, GPIO_PIN_RESET);////d4
	  HAL_Delay(delay);
	  HAL_GPIO_WritePin(LED_PORT, LED_PIN8, GPIO_PIN_SET);////d4

	  Sevensegment(segmentNumber[dig3]);
	  HAL_GPIO_WritePin(LED_PORT, LED_PIN7, GPIO_PIN_RESET);///d3
	  HAL_Delay(delay);
	  HAL_GPIO_WritePin(LED_PORT, LED_PIN7, GPIO_PIN_SET);///d3

	  Sevensegment(segmentNumber[dig4]);
	  HAL_GPIO_WritePin(LED_PORT1, LED_PIN9, GPIO_PIN_RESET);//d2
	  HAL_Delay(delay);
	  HAL_GPIO_WritePin(LED_PORT1, LED_PIN9, GPIO_PIN_SET);//d2
    */
  }
  return 0;
}

/*
void writes(int a,int b,int c,int d){
  
    HAL_GPIO_WritePin(LED_PORT1,LED_PIN10,GPIO_PIN_RESET);
    HAL_GPIO_WritePin(LED_PORT,LED_PIN7,GPIO_PIN_SET);
    HAL_GPIO_WritePin(LED_PORT,LED_PIN8,GPIO_PIN_SET);
    HAL_GPIO_WritePin(LED_PORT1,LED_PIN9,GPIO_PIN_SET);

    HAL_GPIO_WritePin(LED_PORT,LED_PIN,GPIO_PIN_SET);
    HAL_GPIO_WritePin(LED_PORT,LED_PIN1,GPIO_PIN_SET);
    HAL_GPIO_WritePin(LED_PORT,LED_PIN2,GPIO_PIN_SET);
    HAL_GPIO_WritePin(LED_PORT1,LED_PIN3,GPIO_PIN_SET);
    HAL_GPIO_WritePin(LED_PORT1,LED_PIN4,GPIO_PIN_SET);
    HAL_GPIO_WritePin(LED_PORT,LED_PIN6,GPIO_PIN_SET);
    HAL_Delay(delay);
///////////abcdefg off
  HAL_GPIO_WritePin(LED_PORT,LED_PIN,GPIO_PIN_RESET);
  HAL_GPIO_WritePin(LED_PORT,LED_PIN1,GPIO_PIN_RESET);
  HAL_GPIO_WritePin(LED_PORT,LED_PIN2,GPIO_PIN_RESET);
  HAL_GPIO_WritePin(LED_PORT1,LED_PIN3,GPIO_PIN_RESET);
  HAL_GPIO_WritePin(LED_PORT1,LED_PIN4,GPIO_PIN_RESET);
  HAL_GPIO_WritePin(LED_PORT,LED_PIN5,GPIO_PIN_RESET);
  HAL_GPIO_WritePin(LED_PORT,LED_PIN6,GPIO_PIN_RESET);
  }
*/



void segnment_NO_OFF(void){
  HAL_GPIO_WritePin(LED_PORT,LED_PIN7,GPIO_PIN_SET);
  HAL_GPIO_WritePin(LED_PORT,LED_PIN8,GPIO_PIN_SET);
  HAL_GPIO_WritePin(LED_PORT1,LED_PIN9,GPIO_PIN_SET);

  HAL_GPIO_WritePin(LED_PORT,LED_PIN,GPIO_PIN_SET);
  HAL_GPIO_WritePin(LED_PORT,LED_PIN1,GPIO_PIN_SET);
  HAL_GPIO_WritePin(LED_PORT,LED_PIN2,GPIO_PIN_SET);
  HAL_GPIO_WritePin(LED_PORT1,LED_PIN3,GPIO_PIN_SET);
  HAL_GPIO_WritePin(LED_PORT1,LED_PIN4,GPIO_PIN_SET);
  HAL_GPIO_WritePin(LED_PORT,LED_PIN5,GPIO_PIN_SET);
  HAL_GPIO_WritePin(LED_PORT,LED_PIN6,GPIO_PIN_SET);
 // HAL_Delay(delay);
  segnment_OFF();
}
void segnment_OFF(void){
  HAL_GPIO_WritePin(LED_PORT,LED_PIN7,GPIO_PIN_RESET);
  HAL_GPIO_WritePin(LED_PORT,LED_PIN8,GPIO_PIN_RESET);
  HAL_GPIO_WritePin(LED_PORT1,LED_PIN9,GPIO_PIN_RESET);

  HAL_GPIO_WritePin(LED_PORT1,LED_PIN10,GPIO_PIN_RESET);

  HAL_GPIO_WritePin(LED_PORT,LED_PIN,GPIO_PIN_RESET);
  HAL_GPIO_WritePin(LED_PORT,LED_PIN1,GPIO_PIN_RESET);
  HAL_GPIO_WritePin(LED_PORT,LED_PIN2,GPIO_PIN_RESET);
  HAL_GPIO_WritePin(LED_PORT1,LED_PIN3,GPIO_PIN_RESET);
  HAL_GPIO_WritePin(LED_PORT1,LED_PIN4,GPIO_PIN_RESET);
  HAL_GPIO_WritePin(LED_PORT,LED_PIN5,GPIO_PIN_RESET);
  HAL_GPIO_WritePin(LED_PORT,LED_PIN6,GPIO_PIN_RESET);
}

void segnment(int i){
  switch(i){
    case 0:
    zero();
    zero_DIGI2();
    break;
  case 1:
    one();
    break;
  case 2:
    two();
    two_DIG2();
    break;
  case 3:
    three();
    three_DIGI2();
    break;
  case 4:
    four();
    four_DIGI2();
    break;
  case 5:
    five();
    five_DIGI2();
    break;
  case 6:
    six();
    six_DIGI2();
    break;
  case 7:
    seven();
    seven_DIGI2();
    break;
  case 8:
    eight();
    eight_DIGI2();
    break;
  case 9:
    nine();
    nine_DIGI2();
    break;
  default:
    segnment_OFF();
}
}

void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
  RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};

  /** Configure the main internal regulator output voltage
  */
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

  /** Initializes the RCC Oscillators according to the specified parameters
    in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLLMUL_4;
  RCC_OscInitStruct.PLL.PLLDIV = RCC_PLLDIV_2;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }

  /** Initializes the CPU, AHB and APB buses clocks
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
                                | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)
  {
    Error_Handler();
  }
  PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART2;
  PeriphClkInit.Usart2ClockSelection = RCC_USART2CLKSOURCE_PCLK1;
  if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
  {
    Error_Handler();
  }
}


/**
    @brief USART2 Initialization Function
    @param None
    @retval None
*/
static void MX_USART2_UART_Init(void)
{
  __HAL_RCC_GPIOA_CLK_ENABLE();
  /**USART2 GPIO Configuration
    PA2     ------> USART2_TX
    PA15     ------> USART2_RX
  */
  GPIO_InitTypeDef GPIO_InitStruct = {0};
  GPIO_InitStruct.Pin = VCP_TX_Pin | VCP_RX_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
  GPIO_InitStruct.Alternate = GPIO_AF4_USART2;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  huart2.Instance = USART2;
  huart2.Init.BaudRate = 115200;
  huart2.Init.WordLength = UART_WORDLENGTH_8B;
  huart2.Init.StopBits = UART_STOPBITS_1;
  huart2.Init.Parity = UART_PARITY_NONE;
  huart2.Init.Mode = UART_MODE_TX_RX;
  huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart2.Init.OverSampling = UART_OVERSAMPLING_16;
  huart2.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
  huart2.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
  if (HAL_UART_Init(&huart2) != HAL_OK)
  {
    Error_Handler();
  }

  __HAL_RCC_USART2_CLK_ENABLE();
}

void Error_Handler(void)
{
  /* User can add his own implementation to report the HAL error return state */
}


// The following makes printf() write to USART2:

#define STDOUT_FILENO   1
#define STDERR_FILENO   2

int _write(int file, uint8_t *ptr, int len)
{
  switch (file)
  {
    case STDOUT_FILENO:
      HAL_UART_Transmit(&huart2, ptr, len, HAL_MAX_DELAY);
      break;

    case STDERR_FILENO:
      HAL_UART_Transmit(&huart2, ptr, len, HAL_MAX_DELAY);
      break;

    default:
      return -1;
  }

  return len;
}