/**
@page RNG_MultiRNG Multiple Random Number Generator example
@verbatim
******************** (C) COPYRIGHT 2017 STMicroelectronics *******************
* @file RNG/RNG_MultiRNG/readme.txt
* @author MCD Application Team
* @brief Description of Multiple Random Number Generator example.
******************************************************************************
*
* 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.
*
******************************************************************************
@endverbatim
@par Example Description
This example guides you through the different configuration steps by mean of HAL API
to ensure RNG random 32bit numbers generation.
At the beginning of the main program the HAL_Init() function is called to reset
all the peripherals, initialize the Flash interface and the systick.
Then the SystemClock_Config() function is used to configure the system
clock (SYSCLK) to run at 180 MHz.
The RNG peripheral configuration is ensured by the HAL_RNG_Init() function.
This later is calling the HAL_RNG_MspInit()function which core is implementing
the configuration of the needed RNG resources according to the used hardware (CLOCK,
GPIO, DMA and NVIC). You may update this function to change RNG configuration.
After startup, user is asked to press key button.
Multiple Random 32bit numbers are generated as soon as the key is pressed.
The Random numbers are updated and displayed on the debugger in aRandom32bit variable.
LED3 will turn ON, if any error is occurred.
@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.
@par Keywords
Analog, RNG, Random, FIPS PUB 140-2, Analog Random number generator, Entropy, Period
@par Directory contents
- RNG/RNG_MultiRNG/Inc/stm32f4xx_hal_conf.h HAL configuration file
- RNG/RNG_MultiRNG/Inc/stm32f4xx_it.h Interrupt handlers header file
- RNG/RNG_MultiRNG/Inc/main.h Main program header file
- RNG/RNG_MultiRNG/Src/stm32f4xx_it.c Interrupt handlers
- RNG/RNG_MultiRNG/Src/main.c Main program
- RNG/RNG_MultiRNG/Src/stm32f4xx_hal_msp.c HAL MSP module
- RNG/RNG_MultiRNG/Src/system_stm32f4xx.c STM32F4xx system clock configuration file
@par Hardware and Software environment
- This example runs on STM32F42xxx/STM32F43xxx devices.
- This example has been tested with STM324x9I-EVAL RevB evaluation board and can be
easily tailored to any other supported device and development board.
@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
* <h3><center>© COPYRIGHT STMicroelectronics</center></h3>
*/
a86ecaa2fb