path: root/src/uart-test/stm_init.c

/**
  ******************************************************************************
  * @file    GPIO/GPIO_IOToggle/Src/main.c
  * @author  MCD Application Team
  * @version V1.0.1
  * @date    26-February-2014
  * @brief   This example describes how to configure and use GPIOs through
  *          the STM32F4xx HAL API.
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
  *
  * 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 "stm_init.h"

UART_HandleTypeDef huart1;
UART_HandleTypeDef huart2;

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/

#define UART1_BAUD_RATE 460800
#define UART2_BAUD_RATE 115200


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

static GPIO_InitTypeDef  GPIO_InitStruct;

/* Private function prototypes -----------------------------------------------*/
static void SystemClock_Config(void);
static void Error_Handler(void);
static void MX_GPIO_Init(void);
static void MX_USART1_UART_Init(void);
static void MX_USART2_UART_Init(void);
/* Private functions ---------------------------------------------------------*/

/**
  * @brief  Main program
  * @param  None
  * @retval None
  */
void stm_init(void)
{
 /* Generic STM32 initialization.

    To proceed, 3 steps are required: */

  /* STM32F4xx HAL library initialization:
       - Configure the Flash prefetch, instruction and Data caches
       - Configure the Systick to generate an interrupt each 1 msec
       - Set NVIC Group Priority to 4
       - Global MSP (MCU Support Package) initialization
     */
  HAL_Init();

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

  /* System interrupt init*/
  /* Sets the priority grouping field */
  HAL_NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_0);
  HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_USART1_UART_Init();
  MX_USART2_UART_Init();
}


/**
  * @brief  System Clock Configuration
  *         The system Clock is configured as follow :
  *            System Clock source            = PLL (HSE)
  *            SYSCLK(Hz)                     = 42000000
  *            HCLK(Hz)                       = 42000000
  *            AHB Prescaler                  = 1
  *            APB1 Prescaler                 = 1
  *            APB2 Prescaler                 = 1
  *            HSI Frequency(Hz)              = 16000000
  *            PLL_M                          = 8
  *            PLL_N                          = 336
  *            PLL_P                          = 8
  *            PLL_Q                          = 7 (unused)
  *            VDD(V)                         = 3.3
  *            Main regulator output voltage  = Scale2 mode
  *            Flash Latency(WS)              = 1
  * @param  None
  * @retval None
  */
static void SystemClock_Config(void)
{
  RCC_ClkInitTypeDef RCC_ClkInitStruct;
  RCC_OscInitTypeDef RCC_OscInitStruct;

  /* Enable Power Control clock */
  __PWR_CLK_ENABLE();

  /* The voltage scaling allows optimizing the power consumption when the device is
     clocked below the maximum system frequency, to update the voltage scaling value
     regarding system frequency refer to product datasheet.  */
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE2);

  /* Enable HSE Oscillator and activate PLL with HSE as source.
   *
   * With 8 MHz HSE oscillator, M=/8, N=*336, P=/8 gives 42 MHz SYSCLK.
   * Divider Q is unused in this configuration.
   */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLM = 8;
  RCC_OscInitStruct.PLL.PLLN = 336;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV8;
  RCC_OscInitStruct.PLL.PLLQ = 7;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
    Error_Handler();
  }

  /* Select PLL as system clock source */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;		/* AHB prescaler */
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;		/* APB1 prescaler /1 gives 42 MHz APB1 */
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;		/* APB2 prescaler /1 gives 42 MHz APB2 */
  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK) {
    Error_Handler();
  }

  /* Set up HSE sourced (8 MHz) MCO1 */
  HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSE, RCC_MCODIV_1);

  /* Set up SYSCLK sourced (42 MHz) MCO2 */
  HAL_RCC_MCOConfig(RCC_MCO2, RCC_MCO2SOURCE_SYSCLK, RCC_MCODIV_1);
}


/** Configure pins as

     PB12   ------> GREEN LED
     PB13   ------> YELLOW LED
     PB14   ------> GREEN lED
     PB15   ------> BLUE LED
     PC9    ------> MCO_2
     PA8    ------> MCO_1
*/
void MX_GPIO_Init(void)
{
  /* GPIO Ports Clock Enable */
  __GPIOA_CLK_ENABLE();
  __GPIOB_CLK_ENABLE();
  __GPIOC_CLK_ENABLE();

  /*Configure LED GPIO pins PB12==red, PB13==yellow, PB14==green, PB15==blue */
  GPIO_InitStruct.Pin = LED_RED | LED_YELLOW | LED_GREEN | LED_BLUE;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_LOW;
  HAL_GPIO_Init(LED_PORT, &GPIO_InitStruct);

  /*Configure GPIO pin : PC9 (RCC_MCO_2) */
  GPIO_InitStruct.Pin = GPIO_PIN_9;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
  GPIO_InitStruct.Alternate = GPIO_AF0_MCO;
  HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

  /*Configure GPIO pin : PA8 (RCC_MCO_1) */
  GPIO_InitStruct.Pin = GPIO_PIN_8;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF0_MCO;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}

/* USART1 init function
 *
 * USART1 uses PA9 and PA10.
 */
void MX_USART1_UART_Init(void)
{

  huart1.Instance          = USART1;
  huart1.Init.BaudRate     = UART1_BAUD_RATE;
  huart1.Init.WordLength   = UART_WORDLENGTH_8B;
  huart1.Init.StopBits     = UART_STOPBITS_1;
  huart1.Init.Parity       = UART_PARITY_NONE;
  huart1.Init.Mode         = UART_MODE_TX_RX;
  huart1.Init.HwFlowCtl    = UART_HWCONTROL_NONE;
  huart1.Init.OverSampling = UART_OVERSAMPLING_16;

  if (HAL_UART_Init(&huart1) != HAL_OK) {
    /* Initialization Error */
    Error_Handler();
  }

}

/* USART2 init function */
void MX_USART2_UART_Init(void)
{

  huart2.Instance          = USART2;
  huart2.Init.BaudRate     = UART2_BAUD_RATE;
  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;

  if (HAL_UART_Init(&huart2) != HAL_OK) {
    /* Initialization Error */
    Error_Handler();
  }
}


/**
  * @brief  This function is executed in case of error occurrence.
  * @param  None
  * @retval None
  */
static void Error_Handler(void)
{
  HAL_GPIO_WritePin(LED_PORT, LED_RED, GPIO_PIN_SET);
  while(1) { ; }
}

#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 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) */

  /* Infinite loop */
  while (1)
  {
  }
}
#endif

/**
  * @}
  */

/**
  * @}
  */

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