From: vl_garistov <vl_garistov@gmail.com>
Date: Wed, 10 Feb 2021 00:29:49 +0000 (+0200)
Subject: Added a third 7-segment example - with driver
X-Git-Url: https://kolegite.com/gitweb/?a=commitdiff_plain;h=3d925ebee6af2cbc7ec1d03268844f661395a7df;p=vmks.git

Added a third 7-segment example - with driver
---

diff --git a/Datasheets/CD4511BC.pdf b/Datasheets/CD4511BC.pdf
new file mode 100644
index 0000000..5dda8a5
Binary files /dev/null and b/Datasheets/CD4511BC.pdf differ
diff --git a/Examples/7-segm_driver/7-segm_driver.ino b/Examples/7-segm_driver/7-segm_driver.ino
new file mode 100644
index 0000000..bbff548
--- /dev/null
+++ b/Examples/7-segm_driver/7-segm_driver.ino
@@ -0,0 +1,67 @@
+#define DATA1_PIN		2
+#define DATA2_PIN		5
+#define DATA3_PIN		4
+#define DATA4_PIN		3
+#define LATCH1_PIN		9
+#define LATCH2_PIN		8
+#define LATCH3_PIN		7
+#define LATCH4_PIN		6
+#define BLANKING_PIN	10
+
+#define BRIGHTNESS		200		// Maximum 255
+
+int print_digit(uint8_t position, uint8_t digit);
+void pulse_pin(uint8_t pin);
+
+const uint8_t data_pins[4] = {DATA1_PIN, DATA2_PIN, DATA3_PIN, DATA4_PIN};
+const uint8_t latch_pins[4] = {LATCH1_PIN, LATCH2_PIN, LATCH3_PIN, LATCH4_PIN};
+
+void setup()
+{
+	for (uint8_t i = 0; i < 4; i++)
+	{
+		pinMode(data_pins[i], OUTPUT);
+		digitalWrite(data_pins[i], LOW);
+		pinMode(latch_pins[i], OUTPUT);
+		digitalWrite(latch_pins[i], HIGH);
+	}
+	pinMode(BLANKING_PIN, OUTPUT);
+	analogWrite(BLANKING_PIN, BRIGHTNESS);
+}
+
+void loop()
+{
+	print_digit(0, 7);
+	print_digit(1, 7);
+	print_digit(2, 3);
+	print_digit(3, 4);
+	delay(1000);
+}
+
+int print_digit(uint8_t position, uint8_t digit)
+{
+	if (position > 3 || digit > 15)
+	{
+		return -1;
+	}
+	
+	// Encode the digit on the four data signals to the drivers
+	for (uint8_t i = 0; i < 4; i++)
+	{
+		digitalWrite(data_pins[i], digit & (1 << i));
+	}
+	// Latch the data
+	pulse_pin(latch_pins[position]);
+
+	return 0;
+}
+
+void pulse_pin(uint8_t pin)
+{
+	// The delay from calling digitalWrite() is enough to satisfy the
+	// setup and hold times of CD5411 but we delay some more for good measure.
+	delayMicroseconds(5);
+	digitalWrite(pin, LOW);
+	delayMicroseconds(5);
+	digitalWrite(pin, HIGH);
+} 
diff --git a/Examples/7-segm_driver/7-segm_driver.png b/Examples/7-segm_driver/7-segm_driver.png
new file mode 100644
index 0000000..e543614
Binary files /dev/null and b/Examples/7-segm_driver/7-segm_driver.png differ
diff --git a/Examples/7-segm_raw/7-segm_raw.ino b/Examples/7-segm_raw/7-segm_raw.ino
index 28913f8..a0d0057 100644
--- a/Examples/7-segm_raw/7-segm_raw.ino
+++ b/Examples/7-segm_raw/7-segm_raw.ino
@@ -14,10 +14,10 @@ const uint8_t pins[8] = {A_PIN, B_PIN, C_PIN, D_PIN, E_PIN, F_PIN, G_PIN, DP_PIN
 const uint8_t segment_map[16] =
 {
 	// A B C D E F G DP
-    0b00000011,	// 0
-    0b10011111,	// 1
-    0b00100101,	// 2
-    0b00001101,	// 3
+	0b00000011,	// 0
+	0b10011111,	// 1
+	0b00100101,	// 2
+	0b00001101,	// 3
 	0b10011001,	// 4
 	0b01001001,	// 5
 	0b01000001,	// 6
@@ -34,44 +34,33 @@ const uint8_t segment_map[16] =
 
 void setup()
 {
-	pinMode(A_PIN, OUTPUT);
-	pinMode(B_PIN, OUTPUT);
-	pinMode(C_PIN, OUTPUT);
-	pinMode(D_PIN, OUTPUT);
-	pinMode(E_PIN, OUTPUT);
-    pinMode(F_PIN, OUTPUT);
-    pinMode(G_PIN, OUTPUT);
-    pinMode(DP_PIN, OUTPUT);
-    digitalWrite(A_PIN, HIGH);
-    digitalWrite(B_PIN, HIGH);
-    digitalWrite(C_PIN, HIGH);
-    digitalWrite(D_PIN, HIGH);
-    digitalWrite(E_PIN, HIGH);
-    digitalWrite(F_PIN, HIGH);
-    digitalWrite(G_PIN, HIGH);
-    digitalWrite(DP_PIN, HIGH);
+	for (uint8_t i = 0; i < 8; i++)
+	{
+		pinMode(pins[i], OUTPUT);
+		digitalWrite(pins[i], HIGH);
+	}
 }
 
 void loop()
 {
 	for (uint8_t cnt = 0; cnt < 16; cnt++)
-    {
-    	print_digit(cnt);
-      	delay(1000);
-    }
+	{
+		print_digit(cnt);
+		delay(1000);
+	}
 }
 
 int print_digit(uint8_t digit)
 {
-    if (digit > 15)
-    {
+	if (digit > 15)
+	{
 		return -1;
 	}
 
-  	for (uint8_t i = 0; i < 8; i++)
-    {
+	for (uint8_t i = 0; i < 8; i++)
+	{
 		digitalWrite(pins[i], segment_map[digit] & (128 >> i));
 	}
-  
+
 	return 0;
 }
diff --git a/Examples/7-segm_shield/7-segm_shield.ino b/Examples/7-segm_shield/7-segm_shield.ino
index e9b8b02..fbd78c6 100644
--- a/Examples/7-segm_shield/7-segm_shield.ino
+++ b/Examples/7-segm_shield/7-segm_shield.ino
@@ -27,7 +27,7 @@ void loop()
   print_digit(3, 9);
 }
 
-/* Write a decimal number between 0 and 9 to one of the 4 digits of the display */
+// Write a decimal number between 0 and 9 to one of the 4 digits of the display
 int print_digit(uint8_t segment, uint8_t value)
 {
   if (value > 15 || segment > 3)