#include "pitches.h"
#include "stm32f1xx_hal.h"
#include "stm32f1xx_hal_gpio.h"

#define SPEAKER_PIN GPIO_PIN_10
#define SPEAKER_PORT GPIOB

const uint16_t buttonPins[] = {GPIO_PIN_9, GPIO_PIN_8, GPIO_PIN_7, GPIO_PIN_6, GPIO_PIN_5, GPIO_PIN_4, GPIO_PIN_3, GPIO_PIN_13};
const uint16_t buttonTones[] = {
  262, 294, 330, 349,
  392, 440, 494, 523
};
const uint8_t numTones = sizeof(buttonPins) / sizeof(buttonPins[0]);

void SystemClock_Config(void);
static void MX_GPIO_Init(void);

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

  while (1)
  {
    int pitch = 0;
    for (uint8_t i = 0; i < numTones; i++) {
      if (HAL_GPIO_ReadPin(GPIOA, buttonPins[i]) == GPIO_PIN_RESET) {
        pitch = buttonTones[i];
      }
    }
    if (pitch) {
      HAL_GPIO_WritePin(SPEAKER_PORT, SPEAKER_PIN, GPIO_PIN_SET);
      HAL_Delay(100); // Adjust this delay as per your requirements
      HAL_GPIO_WritePin(SPEAKER_PORT, SPEAKER_PIN, GPIO_PIN_RESET);
    }
  }
}

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

  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_DIV2;
  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL16;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }

  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_DIV2;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
  {
    Error_Handler();
  }
}

static void MX_GPIO_Init(void)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};

  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOA_CLK_ENABLE();
  __HAL_RCC_GPIOB_CLK_ENABLE();

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(SPEAKER_PORT, SPEAKER_PIN, GPIO_PIN_RESET);

  /*Configure GPIO pins : PA12 PA11 PA10 PA9
                           PA7 PA6 PA5 PA4 */
  GPIO_InitStruct.Pin = GPIO_PIN_12|GPIO_PIN_11|GPIO_PIN_10|GPIO_PIN_9
                          |GPIO_PIN_7|GPIO_PIN_6|GPIO_PIN_5|GPIO_PIN_4;
  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
  GPIO_InitStruct.Pull = GPIO_PULLUP;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  /*Configure GPIO pin : PB10 */
  GPIO_InitStruct.Pin = SPEAKER_PIN;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(SPEAKER_PORT, &GPIO_InitStruct);
}