From b1ef46657afbea456c21ba8b9b1971c6f6904b89 Mon Sep 17 00:00:00 2001
From: "Daniele Verducci (ZenPenguin)" <danieleverducci@gmail.com>
Date: Thu, 19 Nov 2020 08:47:07 +0100
Subject: [PATCH] Untested char output for VGA adapter
---
arduino/vga_adapter/vga_adapter.ino | 50 +++++++++++++++++++++++++++--
1 file changed, 48 insertions(+), 2 deletions(-)
diff --git a/arduino/vga_adapter/vga_adapter.ino b/arduino/vga_adapter/vga_adapter.ino
index c463080..e839386 100644
--- a/arduino/vga_adapter/vga_adapter.ino
+++ b/arduino/vga_adapter/vga_adapter.ino
@@ -105,14 +105,60 @@ VGAX vga;
// Pins
// VGA
-#define R
-#define CLK
+#define VGA_HSYNC 3
+#define VGA_VSYNC 9
+#define VGA_COLOR1 6
+#define VGA_COLOR2 7
+#define CLK 8
+#define RS 9
+const byte DATA [] = {10, 11, 12, 13, A3, A4, A5, A6};
+
+
+bool clkState = false;
void setup() {
+ // Init comm pins
+ pinMode(CLK, INPUT_PULLUP);
+ for(int pin = 0; pin < 8; pin++) {
+ pinMode(DATA[pin], INPUT);
+ }
+
+ // Init VGA
vga.begin();
vga.clear(11);
}
void loop() {
+ bool newClkState = digitalRead(CLK);
+ if (newClkState = false && clkState == true) {
+ // Falling edge: read data from bus
+ onClk();
+ }
+ clkState = newClkState;
+}
+
+void onClk() {
+ bool isCommand = digitalRead(RS);
+ if (isCommand) {
+ onCommandReceived();
+ onDataReceived();
+ }
+}
+
+void onCommandReceived() {
}
+
+void onDataReceived() {
+ char ch = readByte();
+ vga.printSRAM((byte*)fnt_nanofont_data, FNT_NANOFONT_SYMBOLS_COUNT, FNT_NANOFONT_HEIGHT, 3, 1, ch, 0, 0, 1);
+}
+
+byte readByte() {
+ unsigned int data = 0;
+ for(int pin=0; pin < 8; pin++) {
+ byte b = digitalRead(DATA[pin]) ? 1 : 0;
+ data = (data << 1) + b; // Shifta di 1 e aggiunge il bit corrente. Serve per ricostruire il numero da binario
+ }
+ return data;
+}