gongyu
diff --git a/‎cores/esp32/Arduino.h
Copy file name to clipboardExpand all lines: cores/esp32/Arduino.h
+11-3Lines changed: 11 additions & 3 deletions b/‎cores/esp32/Arduino.h
Copy file name to clipboardExpand all lines: cores/esp32/Arduino.h
+11-3Lines changed: 11 additions & 3 deletions
diff --git a/‎cores/esp32/WMath.cpp
Copy file name to clipboardExpand all lines: cores/esp32/WMath.cpp
+15-1Lines changed: 15 additions & 1 deletion b/‎cores/esp32/WMath.cpp
Copy file name to clipboardExpand all lines: cores/esp32/WMath.cpp
+15-1Lines changed: 15 additions & 1 deletion
@@ -137,9 +137,19 @@ typedef unsigned int word;
 void setup(void);
 void loop(void);
 
+// The default is using Real Hardware random number generator  
+// But when randomSeed() is called, it turns to Psedo random
+// generator, exactly as done in Arduino mainstream
+long random(long);
 long random(long, long);
-#endif
+// Calling randomSeed() will make random()
+// using pseudo random like in Arduino
 void randomSeed(unsigned long);
+// Allow the Application to decide if the random generator
+// will use Real Hardware random generation (true - default)
+// or Pseudo random generation (false) as in Arduino MainStream
+void useRealRandomGenerator(bool useRandomHW);
+#endif
 long map(long, long, long, long, long);
 
 #ifdef __cplusplus
@@ -207,8 +217,6 @@ void setToneChannel(uint8_t channel = 0);
 void tone(uint8_t _pin, unsigned int frequency, unsigned long duration = 0);
 void noTone(uint8_t _pin);
 
-// WMath prototypes
-long random(long);
 #endif /* __cplusplus */
 
 #include "pins_arduino.h"
 
@@ -29,10 +29,22 @@ extern "C" {
 }
 #include "esp32-hal-log.h"
 
+// Allows the user to choose between Real Hardware
+// or Software Pseudo random generators for the
+// Arduino random() functions
+static bool s_useRandomHW = true;
+void useRealRandomGenerator(bool useRandomHW) {
+  s_useRandomHW = useRandomHW;
+}
+
+// Calling randomSeed() will force the
+// Pseudo Random generator like in 
+// Arduino mainstream API
 void randomSeed(unsigned long seed)
 {
     if(seed != 0) {
         srand(seed);
+        s_useRandomHW = false;
     }
 }
 
@@ -46,7 +58,9 @@ long random( long howbig )
   if (howbig < 0) {
     return (random(0, -howbig));
   }
-  return esp_random() % howbig;
+  // if randomSeed was called, fall back to software PRNG
+  uint32_t val = (s_useRandomHW) ? esp_random() : rand();
+  return val % howbig;
 }
 
 long random(long howsmall, long howbig)
Original file line number	Diff line number	Diff line change
`@@ -29,10 +29,22 @@ extern "C" {`
`29`	`29`	`}`
`30`	`30`	`#include "esp32-hal-log.h"`
`31`	`31`
	`32`	`+// Allows the user to choose between Real Hardware`
	`33`	`+// or Software Pseudo random generators for the`
	`34`	`+// Arduino random() functions`
	`35`	`+static bool s_useRandomHW = true;`
	`36`	`+void useRealRandomGenerator(bool useRandomHW) {`
	`37`	`+ s_useRandomHW = useRandomHW;`
	`38`	`+}`
	`39`	`+`
	`40`	`+// Calling randomSeed() will force the`
	`41`	`+// Pseudo Random generator like in`
	`42`	`+// Arduino mainstream API`
`32`	`43`	`void randomSeed(unsigned long seed)`
`33`	`44`	`{`
`34`	`45`	`if(seed != 0) {`
`35`	`46`	`srand(seed);`
	`47`	`+ s_useRandomHW = false;`
`36`	`48`	`}`
`37`	`49`	`}`
`38`	`50`
`@@ -46,7 +58,9 @@ long random( long howbig )`
`46`	`58`	`if (howbig < 0) {`
`47`	`59`	`return (random(0, -howbig));`
`48`	`60`	`}`
`49`		`- return esp_random() % howbig;`
	`61`	`+ // if randomSeed was called, fall back to software PRNG`
	`62`	`+ uint32_t val = (s_useRandomHW) ? esp_random() : rand();`
	`63`	`+ return val % howbig;`
`50`	`64`	`}`
`51`	`65`
`52`	`66`	`long random(long howsmall, long howbig)`