stm32f103-usb-keyboard/Src/main.c

/**
  ******************************************************************************
  * File Name          : main.c
  * Description        : Main program body
  ******************************************************************************
  *
  * COPYRIGHT(c) 2016 STMicroelectronics
  *
  * Redistribution and use in source and binary forms, with or without modification,
  * are permitted provided that the following conditions are met:
  *   1. Redistributions of source code must retain the above copyright notice,
  *      this list of conditions and the following disclaimer.
  *   2. Redistributions in binary form must reproduce the above copyright notice,
  *      this list of conditions and the following disclaimer in the documentation
  *      and/or other materials provided with the distribution.
  *   3. Neither the name of STMicroelectronics nor the names of its contributors
  *      may be used to endorse or promote products derived from this software
  *      without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  ******************************************************************************
  */
/* Includes ------------------------------------------------------------------*/
#include <usbd_hid.h>
#include <stdbool.h>
#include <keyboard.h>
#include <circbuf.h>
#include "stm32f1xx_hal.h"
#include "usart.h"
#include "usb_device.h"
#include "gpio.h"

/* USER CODE BEGIN Includes */

/* USER CODE END Includes */

/* Private variables ---------------------------------------------------------*/

/* USER CODE BEGIN PV */
/* Private variables ---------------------------------------------------------*/

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);

void Error_Handler(void);

/* USER CODE BEGIN PFP */
/* Private function prototypes -----------------------------------------------*/

/* USER CODE END PFP */

/* USER CODE BEGIN 0 */

CircBuf *key_cbuf;


void fkey_press(uint8_t key) {
	KeyEvent ke = {key, true};
	cbuf_append(key_cbuf, &ke);
}

void fkey_release(uint8_t key) {
	KeyEvent ke = {key, false};
	cbuf_append(key_cbuf, &ke);
}

void fkey_type(uint8_t key, bool shift) {
	if(shift) fkey_press(KEY_LEFTSHIFT);
	fkey_press(key);
	fkey_release(key);
	if(shift) fkey_release(KEY_LEFTSHIFT);
}


/** Print a debug message */
void dbg(const char *msg) {
	HAL_UART_Transmit(&huart2, (char *) msg, (uint16_t) strlen(msg), 10);
}


void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin) {
	UNUSED(GPIO_Pin);

	static uint32_t lasttick = 0;

	dbg("EXTI!\r\n");

	if (HAL_GetTick() - lasttick < 1000) {
		dbg("Discard, too soon\r\n");
		return;
	}

	dbg("HEYOOO\r\n");

	fkey_type(KEY_H, true);
	fkey_type(KEY_E, false);
	fkey_type(KEY_L, false);
	fkey_type(KEY_L, false);
	fkey_type(KEY_O, false);
	fkey_type(KEY_SPACE, false);
	fkey_type(KEY_W, true);
	fkey_type(KEY_O, false);
	fkey_type(KEY_R, false);
	fkey_type(KEY_L, false);
	fkey_type(KEY_D, false);
	fkey_type(KEY_ENTER, false);
}

/* USER CODE END 0 */

int main(void) {
	/* USER CODE BEGIN 1 */
	kybd_clear();

	key_cbuf = cbuf_create(100, sizeof(KeyEvent));

	/* USER CODE END 1 */

	/* MCU Configuration----------------------------------------------------------*/

	/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
	HAL_Init();

	/* Configure the system clock */
	SystemClock_Config();

	/* Initialize all configured peripherals */
	MX_GPIO_Init();
	MX_USART2_UART_Init();
	MX_USB_DEVICE_Init();

	/* USER CODE BEGIN 2 */

	/* USER CODE END 2 */

	/* Infinite loop */
	/* USER CODE BEGIN WHILE */
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wmissing-noreturn"

	dbg("-- READY! --\r\n\r\n");

	char msg[] = "A\r\n";

	while (1) {
		/* USER CODE END WHILE */

		/* USER CODE BEGIN 3 */

		HAL_Delay(500);
		HAL_GPIO_TogglePin(LED_GPIO_Port, LED_Pin);

		dbg(msg);

		// Toggle
		if (msg[0] == 'A') {
			msg[0] = 'B';
		} else {
			msg[0] = 'A';
		}
	}

#pragma clang diagnostic pop
	/* USER CODE END 3 */

}

/** System Clock Configuration
*/
void SystemClock_Config(void) {

	RCC_OscInitTypeDef RCC_OscInitStruct;
	RCC_ClkInitTypeDef RCC_ClkInitStruct;
	RCC_PeriphCLKInitTypeDef PeriphClkInit;

	RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
	RCC_OscInitStruct.HSEState = RCC_HSE_ON;
	RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
	RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
	RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
	RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
	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();
	}

	PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USB;
	PeriphClkInit.UsbClockSelection = RCC_USBCLKSOURCE_PLL_DIV1_5;
	if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK) {
		Error_Handler();
	}

	HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq() / 1000);

	HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);

	/* SysTick_IRQn interrupt configuration */
	HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
}

/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

/**
  * @brief  This function is executed in case of error occurrence.
  * @param  None
  * @retval None
  */
void Error_Handler(void) {
	/* USER CODE BEGIN Error_Handler */
	/* User can add his own implementation to report the HAL error return state */
	while (1) {
	}
	/* USER CODE END Error_Handler */
}

#ifdef USE_FULL_ASSERT

/**
   * @brief Reports the name of the source file and the source line number
   * where the assert_param error has occurred.
   * @param file: pointer to the source file name
   * @param line: assert_param error line source number
   * @retval None
   */
void assert_failed(uint8_t* file, uint32_t line)
{
  /* USER CODE BEGIN 6 */
  /* User can add his own implementation to report the file name and line number,
	ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */

}

#endif

/**
  * @}
  */

/**
  * @}
*/

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/