Updated Soft_RNG library - v1.1 with Dual-Timer Entropy enhancement

Debug/Src/main.cyclo

@@ -1 +1 @@
-../Src/main.c:9:5:main	2
+../Src/main.c:11:5:main	2

Debug/Src/main.su

@@ -1 +1 @@
-../Src/main.c:9:5:main	16	static
+../Src/main.c:11:5:main	16	static

README.md

@@ -1,4 +1,4 @@
 # Software Random Number Generator
-A Software library to generate 32-bit Random Numbers using an onboard 32-bit Timer
+A Software library to generate 32-bit Random Numbers using onboard 32-bit Timers
 and a combination of LFSR, XOR Shift and the FNV hash function on an STM32F401
 Nucleo Development Board

Src/Soft_RNG.c

@@ -14,10 +14,10 @@ static void TIM2_Init(void)
 static void TIM3_Init(void)
 {
 	RCC->APB1ENR |= RCC_APB1ENR_TIM3EN;
-	TIM2->CR1 |= TIM_CR1_DIR;
-	TIM2->PSC = 479;
-	TIM2->ARR = 0xFFFFFFFF;
-	TIM2->CR1 |= TIM_CR1_CEN;
+	TIM3->CR1 |= TIM_CR1_DIR;
+	TIM3->PSC = 479;
+	TIM3->ARR = 0xFFFFFFFF;
+	TIM3->CR1 |= TIM_CR1_CEN;
 }
 
 static uint32_t GetHardwareSeed(void)
@@ -69,7 +69,7 @@ uint32_t SoftRNG_Generate(void)
 	uint16_t seed16 = seedValue & 0xFFFF;
 	uint16_t lfsrVal = GetLFSR(seed16);
 	uint32_t xorVal = GetXORShift(seedValue);
-	uint32_t combined = (lfsrVal ^ xorVal) * 1664525 + 1013904223 ;
+	uint32_t combined = (lfsrVal & xorVal);
 	uint32_t randomVal = GetFNVHash(combined);
 	return randomVal;
 }

Src/main.c

@@ -1,4 +1,6 @@
+#include <stdio.h>
 #include <stdint.h>
+
 #include "LED.h"
 #include "SYSTICK.h"
 #include "W25Qxx.h"
@@ -8,21 +10,21 @@ uint32_t count = 0;
 
 int main()
 {
-	uint32_t random;
+    uint32_t random;
 
-	LED_Init();
-	W25Q_Init();
-	SoftRNG_Init();
+    LED_Init();
+    W25Q_Init();
+    SoftRNG_Init();
 
-	for(int i = 0; i < 100000; i++)
-	{
-		random = SoftRNG_Generate();
-		W25Q_WriteData(i, 0, 4, (uint8_t *)&random);
-		count++;
-	}
+    for(int i = 0; i < 10000; i++)
+    {
+        random = SoftRNG_Generate();
+        W25Q_WriteData(i, 0, 4, (uint8_t *)&random);
+        count++;
+    }
 
-	while(1)
-	{
+    while(1)
+    {
 
-	}
+    }
 }