Ch32v30x Random Number Genearator test.

examples_v30x/rng_rand_test/Makefile

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+all : flash
+
+TARGET:=rng_rand_test
+TARGET_MCU:=CH32V303
+TARGET_MCU_PACKAGE:=CH32V303
+
+include ../../ch32fun/ch32fun.mk
+
+flash : cv_flash
+clean : cv_clean
+
+

examples_v30x/rng_rand_test/ch32v30x_rng.h

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+#include "ch32fun.h"
+
+static void RNG_init(void) {
+	// Enable RNG clock
+	RCC->AHBPCENR |= RCC_AHBPeriph_RNG;
+
+	// Enable the RNG
+	RNG->CR |= RNG_CR_RNGEN;
+}
+
+// Get a random number (blocking)
+static u32 RNG_rand(void) {
+	// Wait until data is ready
+	while(!(RNG->SR & RNG_SR_DRDY)) {
+		// Handle seed error
+		if(!(RNG->SR & RNG_SR_SECS)) continue;
+
+		RNG->CR &= ~RNG_CR_RNGEN;		// Disable RNG
+		RNG->SR = 0;					// Clear error flags
+		RNG->CR |= RNG_CR_RNGEN;		// Re-enable RNG
+	}
+
+	// Read and return random number
+	return RNG->DR;
+}

examples_v30x/rng_rand_test/funconfig.h

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+#ifndef _FUNCONFIG_H
+#define _FUNCONFIG_H
+
+#define FUNCONF_SYSTICK_USE_HCLK 1
+#define FUNCONF_USE_HSI 1
+#define FUNCONF_USE_PLL 0
+#define FUNCONF_PLL_MULTIPLIER 2
+
+#define FUNCONF_USE_DEBUGPRINTF 1
+#define FUNCONF_SYSTEM_CORE_CLOCK 8 * 1000 * 1000 
+
+#endif
+

examples_v30x/rng_rand_test/rng_rand_test.c

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+// Simple example that shows how to use the Random Number Generator functions
+
+#include "ch32fun.h"
+#include <stdio.h>
+#include "ch32v30x_rng.h"
+
+int main() {
+	SystemInit();
+	Delay_Ms(100);
+
+	printf("\n~ Random Number Test ~\n");
+	RNG_init();
+
+	while(1) {
+		u32 rand = RNG_rand();
+		printf("Dec=%10u, Hex=0x%08X\n", rand, rand);
+		Delay_Ms(1000);
+	}
+}