Everything relating to using STM32 boards with the Arduino IDE and alternatives
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//true rng
//initialize the rng
void rngInit(void) {
RCC->AHBENR |= RCC_AHBENR_RNGEN; //ENABLE rng
//configure the clock
RCC->CCIPR = (RCC->CCIPR &~RCC_CCIPR_RNGSEL) | (1<<RCC_CCIPR_RNGSEL_Pos); //select the clock. 0->no clock, 1->HSI16, 2->sysclk, 3->pllclk
RCC->CCIPR = (RCC->CCIPR &~RCC_CCIPR_RNGDIV) | (0<<RCC_CCIPR_RNGDIV_Pos); //set the divider. 0->1:1, 1->2:1, 2->4:1, 3->8:1
RNG->CR = 0; //default value
RNG->SR = 0; //default value
RNG->CR|= RNG_CR_RNGEN; //ENABLE rng
}
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#define HAL_RNG_MODULE_ENABLED
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RNG_HandleTypeDef hrng;
/**
* @brief RNG MSP Initialization
* This function configures the hardware resources used in this example
* @param hrng: RNG handle pointer
* @retval None
*/
extern "C" void HAL_RNG_MspInit(RNG_HandleTypeDef* hrng) {
/* Peripheral clock enable */
__HAL_RCC_RNG_CLK_ENABLE();
}
/**
* @brief RNG MSP De-Initialization
* This function freeze the hardware resources used in this example
* @param hrng: RNG handle pointer
* @retval None
*/
extern "C" void HAL_RNG_MspDeInit(RNG_HandleTypeDef* hrng) {
if (hrng->Instance == RNG) {
/* Peripheral clock disable */
__HAL_RCC_RNG_CLK_DISABLE();
/* Enable RNG reset state */
__HAL_RCC_RNG_FORCE_RESET();
/* Release RNG from reset state */
__HAL_RCC_RNG_RELEASE_RESET();
}
}
void setup() {
Serial.begin(9600);
hrng.Instance = RNG;
if (HAL_RNG_Init(&hrng) != HAL_OK) {
Error_Handler();
}
}
void loop() {
uint32_t aRandom32bit;
if (HAL_RNG_GenerateRandomNumber(&hrng, &aRandom32bit) != HAL_OK) {
/* Random number generation error */
Error_Handler();
} else {
Serial.println(aRandom32bit);
}
delay(1000);
}
the code I gave was for the G0 series. For your chip, you will have to read the datasheet / reference manul and the header file to see which bits will need to be set / reset for this to work. But the general approach is the same.And since I don't really understand how to work stuff like that, I guess, I'll just have to use the Arduino RNG again.
Thank you so much for that code. I have an issue with it though. It doesn't compile. And I don't know what to do with it.fpiSTM wrote: Mon Sep 04, 2023 1:24 pm You can also use HAL directly:
First HAL RNG have to be enabled, to do this, simply add a file named "hal_conf_extra.h" and add this:Then the code:Code: Select all
#define HAL_RNG_MODULE_ENABLEDCode: Select all
RNG_HandleTypeDef hrng; /** * @brief RNG MSP Initialization * This function configures the hardware resources used in this example * @param hrng: RNG handle pointer * @retval None */ extern "C" void HAL_RNG_MspInit(RNG_HandleTypeDef* hrng) { /* Peripheral clock enable */ __HAL_RCC_RNG_CLK_ENABLE(); } /** * @brief RNG MSP De-Initialization * This function freeze the hardware resources used in this example * @param hrng: RNG handle pointer * @retval None */ extern "C" void HAL_RNG_MspDeInit(RNG_HandleTypeDef* hrng) { if (hrng->Instance == RNG) { /* Peripheral clock disable */ __HAL_RCC_RNG_CLK_DISABLE(); /* Enable RNG reset state */ __HAL_RCC_RNG_FORCE_RESET(); /* Release RNG from reset state */ __HAL_RCC_RNG_RELEASE_RESET(); } } void setup() { Serial.begin(9600); hrng.Instance = RNG; if (HAL_RNG_Init(&hrng) != HAL_OK) { Error_Handler(); } } void loop() { uint32_t aRandom32bit; if (HAL_RNG_GenerateRandomNumber(&hrng, &aRandom32bit) != HAL_OK) { /* Random number generation error */ Error_Handler(); } else { Serial.println(aRandom32bit); } delay(1000); }
This means you have to create file with arduino ideFirst HAL RNG have to be enabled, to do this, simply add a file named "hal_conf_extra.h" and add this:
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#define HAL_RNG_MODULE_ENABLED