/**
@page DAC_SignalsGeneration DAC Signals generation example
@verbatim
******************** (C) COPYRIGHT 2017 STMicroelectronics *******************
* @file DAC/DAC_SignalsGeneration/readme.txt
* @author MCD Application Team
* @brief Description of the DAC Signals generation example.
******************************************************************************
* @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.
*
******************************************************************************
@endverbatim
@par Example Description
This example provides a short description of how to use the DAC peripheral to generate
several signals using DMA controller.
For each press on User push-button, a signal has been selected and can be monitored on
the DAC channel one:
- Triangle waveform (Channel 1), amplitude: ~1V, frequency: order of tens Hz.
- Escalator waveform (Channel 1) using DMA transfer, amplitude: ~3V, frequency: order of KHz.
STM32469I-DISCOVERY boards LED can be used to monitor the process status:
- LED3 is ON and example is stopped (using infinite loop)
when there is an error during process.
@note Care must be taken when using HAL_Delay(), this function provides accurate delay (in milliseconds)
based on variable incremented in SysTick ISR. This implies that if HAL_Delay() is called from
a peripheral ISR process, then the SysTick interrupt must have higher priority (numerically lower)
than the peripheral interrupt. Otherwise the caller ISR process will be blocked.
To change the SysTick interrupt priority you have to use HAL_NVIC_SetPriority() function.
@note The application needs to ensure that the SysTick time base is always set to 1 millisecond
to have correct HAL operation.
@note The connection of the LCD reset pin to a dedicated GPIO PH7 instead of the STM32F469 NRST pin may cause residual display on LCD with applications/examples that do not require display.
The LCD clear can be ensured by hardware through the boards power off/power on or by software calling the BSP_LCD_Reset() function.
@par Keywords
Analog, DAC, Signals generation, DMA, Triangle, Escalator, Waveform, Amplitude
@par Directory contents
- DAC/DAC_SignalsGeneration/Inc/stm32f4xx_hal_conf.h HAL configuration file
- DAC/DAC_SignalsGeneration/Inc/stm32f4xx_it.h DAC interrupt handlers header file
- DAC/DAC_SignalsGeneration/Inc/main.h Header for main.c module
- DAC/DAC_SignalsGeneration/Src/stm32f4xx_it.c DAC interrupt handlers
- DAC/DAC_SignalsGeneration/Src/main.c Main program
- DAC/DAC_SignalsGeneration/Src/stm32f4xx_hal_msp.c HAL MSP file
- DAC/DAC_SignalsGeneration/Src/system_stm32f4xx.c STM32F4xx system source file
@par Hardware and Software environment
- This example runs on STM32F469xx devices.
- This example has been tested with STM32469I-DISCOVERY board and can be
easily tailored to any other supported device and development board.
- STM32469I-DISCOVERY Set-up :
- Connect PA4 (DAC Channel1) (pin 6 in CN8) to an oscilloscope.
- Use User push-button connected to PA.00.
@par How to use it ?
In order to make the program work, you must do the following :
- Open your preferred toolchain
- Rebuild all files and load your image into target memory
- Run the example
*/
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