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/**
******************************************************************************
* @file DAC/DAC_SignalsGeneration/Src/main.c
* @author MCD Application Team
* @brief This example provides a short description of how to use the DAC
* peripheral to generate several signals.
******************************************************************************
* @attention
*
* Copyright (c) 2017 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "main.h"
/** @addtogroup STM32F4xx_HAL_Examples
* @{
*/
/** @addtogroup DAC_SignalsGeneration
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
DAC_HandleTypeDef DacHandle;
static DAC_ChannelConfTypeDef sConfig;
const uint8_t aEscalator8bit[6] = {0x0, 0x33, 0x66, 0x99, 0xCC, 0xFF};
__IO uint8_t ubSelectedWavesForm = 1;
__IO uint8_t ubKeyPressed = SET;
/* Private function prototypes -----------------------------------------------*/
static void DAC_Ch1_TriangleConfig(void);
static void DAC_Ch1_EscalatorConfig(void);
static void TIM6_Config(void);
static void SystemClock_Config(void);
static void Error_Handler(void);
/* Private functions ---------------------------------------------------------*/
/**
* @brief Main program.
* @param None
* @retval None
*/
int main(void)
{
/* STM32F4xx HAL library initialization:
- Configure the Flash prefetch
- Systick timer is configured by default as source of time base, but user
can eventually implement his proper time base source (a general purpose
timer for example or other time source), keeping in mind that Time base
duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
handled in milliseconds basis.
- Set NVIC Group Priority to 4
- Low Level Initialization
*/
HAL_Init();
/* Configure the system clock to 180 MHz */
SystemClock_Config();
/* Initialize IO expander */
BSP_IO_Init();
/* Configure LED3 */
BSP_LED_Init(LED3);
/* Configures User push-button */
BSP_PB_Init(BUTTON_TAMPER, BUTTON_MODE_EXTI);
/* Power down camera to apply high impedance on data bus */
/* Camera power down sequence */
BSP_IO_ConfigPin(RSTI_PIN, IO_MODE_OUTPUT);
BSP_IO_ConfigPin(XSDN_PIN, IO_MODE_OUTPUT);
/* De-assert the camera STANDBY pin (active high) */
BSP_IO_WritePin(XSDN_PIN, BSP_IO_PIN_RESET);
/* Assert the camera RSTI pin (active low) */
BSP_IO_WritePin(RSTI_PIN, BSP_IO_PIN_RESET);
/*##-1- Configure the DAC peripheral #######################################*/
DacHandle.Instance = DACx;
/*##-2- Configure the TIM peripheral #######################################*/
TIM6_Config();
/* Infinite loop */
while (1)
{
/* If the Key is pressed */
if (ubKeyPressed != RESET)
{
HAL_DAC_DeInit(&DacHandle);
/* select waves forms according to the User push-button status */
if (ubSelectedWavesForm == 1)
{
/* The triangle wave has been selected */
/* Triangle Wave generator -------------------------------------------*/
DAC_Ch1_TriangleConfig();
}
else
{
/* The escalator wave has been selected */
/* Escalator Wave generator -------------------------------------------*/
DAC_Ch1_EscalatorConfig();
}
ubKeyPressed = RESET;
}
}
}
/**
* @brief System Clock Configuration
* The system Clock is configured as follow :
* System Clock source = PLL (HSE)
* SYSCLK(Hz) = 180000000
* HCLK(Hz) = 180000000
* AHB Prescaler = 1
* APB1 Prescaler = 4
* APB2 Prescaler = 2
* HSE Frequency(Hz) = 8000000
* PLL_M = 8
* PLL_N = 360
* PLL_P = 2
* PLL_Q = 7
* VDD(V) = 3.3
* Main regulator output voltage = Scale1 mode
* Flash Latency(WS) = 5
* @param None
* @retval None
*/
static void SystemClock_Config(void)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
HAL_StatusTypeDef ret = HAL_OK;
/* Enable Power Control clock */
__HAL_RCC_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_SCALE1);
/* Enable HSE Oscillator and activate PLL with HSE as source */
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 = 360;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLQ = 7;
RCC_OscInitStruct.PLL.PLLR = 2;
ret = HAL_RCC_OscConfig(&RCC_OscInitStruct);
if(ret != HAL_OK)
{
Error_Handler();
}
/* activate the OverDrive to reach the 180 Mhz Frequency */
ret = HAL_PWREx_EnableOverDrive();
if(ret != HAL_OK)
{
Error_Handler();
}
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2
clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
ret = HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5);
if(ret != HAL_OK)
{
Error_Handler();
}
}
/**
* @brief This function is executed in case of error occurrence.
* @param None
* @retval None
*/
static void Error_Handler(void)
{
/* Turn LED3 on */
BSP_LED_On(LED3);
while(1)
{
}
}
static void DAC_Ch1_EscalatorConfig(void)
{
/*##-1- Initialize the DAC peripheral ######################################*/
if (HAL_DAC_Init(&DacHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/*##-1- DAC channel1 Configuration #########################################*/
sConfig.DAC_Trigger = DAC_TRIGGER_T6_TRGO;
sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
if (HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DACx_CHANNEL) != HAL_OK)
{
/* Channel configuration Error */
Error_Handler();
}
/*##-2- Enable DAC selected channel and associated DMA #############################*/
if (HAL_DAC_Start_DMA(&DacHandle, DACx_CHANNEL, (uint32_t *)aEscalator8bit, 6, DAC_ALIGN_8B_R) != HAL_OK)
{
/* Start DMA Error */
Error_Handler();
}
}
/**
* @brief DAC Channel1 Triangle Configuration
* @param None
* @retval None
*/
static void DAC_Ch1_TriangleConfig(void)
{
/*##-1- Initialize the DAC peripheral ######################################*/
if (HAL_DAC_Init(&DacHandle) != HAL_OK)
{
/* DAC initialization Error */
Error_Handler();
}
/*##-2- DAC channel2 Configuration #########################################*/
sConfig.DAC_Trigger = DAC_TRIGGER_T6_TRGO;
sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
if (HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DACx_CHANNEL) != HAL_OK)
{
/* Channel configuration Error */
Error_Handler();
}
/*##-3- DAC channel2 Triangle Wave generation configuration ################*/
if (HAL_DACEx_TriangleWaveGenerate(&DacHandle, DACx_CHANNEL, DAC_TRIANGLEAMPLITUDE_1023) != HAL_OK)
{
/* Triangle wave generation Error */
Error_Handler();
}
/*##-4- Enable DAC Channel1 ################################################*/
if (HAL_DAC_Start(&DacHandle, DACx_CHANNEL) != HAL_OK)
{
/* Start Error */
Error_Handler();
}
/*##-5- Set DAC channel1 DHR12RD register ################################################*/
if (HAL_DAC_SetValue(&DacHandle, DACx_CHANNEL, DAC_ALIGN_12B_R, 0x100) != HAL_OK)
{
/* Setting value Error */
Error_Handler();
}
}
/**
* @brief EXTI line detection callbacks
* @param GPIO_Pin: Specifies the pins connected EXTI line
* @retval None
*/
void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
{
/* Change the wave */
ubKeyPressed = 1;
/* Change the selected waves forms */
ubSelectedWavesForm = !ubSelectedWavesForm;
}
/**
* @brief TIM6 Configuration
* @note TIM6 configuration is based on APB1 frequency
* @note TIM6 Update event occurs each TIM6CLK/256
* @param None
* @retval None
*/
void TIM6_Config(void)
{
static TIM_HandleTypeDef htim;
TIM_MasterConfigTypeDef sMasterConfig;
/*##-1- Configure the TIM peripheral #######################################*/
/* Time base configuration */
htim.Instance = TIM6;
htim.Init.Period = 0x7FF;
htim.Init.Prescaler = 0;
htim.Init.ClockDivision = 0;
htim.Init.CounterMode = TIM_COUNTERMODE_UP;
htim.Init.RepetitionCounter = 0;
HAL_TIM_Base_Init(&htim);
/* TIM6 TRGO selection */
sMasterConfig.MasterOutputTrigger = TIM_TRGO_UPDATE;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
HAL_TIMEx_MasterConfigSynchronization(&htim, &sMasterConfig);
/*##-2- Enable TIM peripheral counter ######################################*/
HAL_TIM_Base_Start(&htim);
}
#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
/**
* @}
*/
/**
* @}
*/
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