From: Vladimir Garistov <vl.garistov@gmail.com>
Date: Mon, 27 Feb 2023 09:51:27 +0000 (+0200)
Subject: Improved 7-segm_driver_random example
X-Git-Url: https://kolegite.com/gitweb/?a=commitdiff_plain;h=6f13f6f1a5dc9f2ec429a24c125d23cf36ed02b8;p=vmks.git

Improved 7-segm_driver_random example
---

diff --git a/Examples/7-segment/7-segm_driver_random/7-segm_driver_random.ino b/Examples/7-segment/7-segm_driver_random/7-segm_driver_random.ino
index 075efc3..00b44e8 100644
--- a/Examples/7-segment/7-segm_driver_random/7-segm_driver_random.ino
+++ b/Examples/7-segment/7-segm_driver_random/7-segm_driver_random.ino
@@ -1,16 +1,16 @@
 #include <stdlib.h>
 
-#define DATA1_PIN		12
-#define DATA2_PIN		5
-#define DATA3_PIN		4
-#define DATA4_PIN		13
-#define LATCH0_PIN		11
-#define LATCH1_PIN		9
-#define LATCH2_PIN		8
-#define LATCH3_PIN		7
-#define LATCH4_PIN		6
+#define DATA1_PIN		8
+#define DATA2_PIN		9
+#define DATA3_PIN		10
+#define DATA4_PIN		11
+#define LATCH0_PIN		12
+#define LATCH1_PIN		13
+#define LATCH2_PIN		7
+#define LATCH3_PIN		5
+#define LATCH4_PIN		4
 #define LATCH5_PIN		A5
-#define BLANKING_PIN	10
+#define BLANKING_PIN	6
 
 #define BUTTON_PIN		3
 #define POT_PIN			A4
@@ -29,37 +29,39 @@ void print_7segm(uint32_t val);
 
 void setup()
 {
-	Serial.begin(9600);
-
 	pinMode(NC_PIN, INPUT);
-	srand(analogRead(NC_PIN));
-
+	uint16_t seed = analogRead(NC_PIN);
+	Serial.begin(9600);
+	Serial.print("PRNG seed: ");
+	Serial.println(seed);
+	srandom(seed);
+  
 	for (uint8_t i = 0; i < 4; i++)
 	{
-		pinMode(data_pins[i], OUTPUT);
 		digitalWrite(data_pins[i], LOW);
+		pinMode(data_pins[i], OUTPUT);
 	}
 	for (uint8_t i = 0; i < DIGITS; i++)
 	{
-		pinMode(latch_pins[i], OUTPUT);
 		digitalWrite(latch_pins[i], HIGH);
+		pinMode(latch_pins[i], OUTPUT);
 	}
 	pinMode(BUTTON_PIN, INPUT_PULLUP);
 	attachInterrupt(digitalPinToInterrupt(BUTTON_PIN), button_ISR, FALLING);
 	pinMode(BLANKING_PIN, OUTPUT);
-	digitalWrite(BLANKING_PIN, HIGH);
+	analogWrite(BLANKING_PIN, BRIGHTNESS);
 }
 
 void loop()
 {
 	print_7segm(current_value);
-	delay(100);
+	delay(10);
 }
 
 void button_ISR(void)
 {
-	current_value = rand();
-	current_value |= ((uint32_t) rand() << 16);
+	current_value = random();
+	current_value |= ((uint32_t) random() << 16);
 	Serial.print(current_value);
 }
 
@@ -73,13 +75,17 @@ void print_7segm(uint32_t val)
 		digit = val % 10;
 		val /= 10;
 		
+		/*
 		for (j = 0; j < 4; j++)
 		{
 			digitalWrite(data_pins[j], digit & (1 << j));
 		}
+		*/
+		PORTB = (PORTB & 0xF0) | digit;
+	  
 		digitalWrite(latch_pins[DIGITS - i - 1], LOW);
-		delay(1);
+		delayMicroseconds(1);
 		digitalWrite(latch_pins[DIGITS - i - 1], HIGH);
-		delay(1);
+		delayMicroseconds(1);
 	}
-}
+}
\ No newline at end of file
diff --git a/Examples/7-segment/7-segm_driver_random/7-segm_driver_random.png b/Examples/7-segment/7-segm_driver_random/7-segm_driver_random.png
index e23e584..c71f59e 100644
Binary files a/Examples/7-segment/7-segm_driver_random/7-segm_driver_random.png and b/Examples/7-segment/7-segm_driver_random/7-segm_driver_random.png differ