58 lines
1.8 KiB
C++
58 lines
1.8 KiB
C++
/**
|
|
* This file is part of Pat80 IO Devices.
|
|
*
|
|
* Pat80 IO Devices is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* Pat80 IO Devices is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY * without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with Pat80 IO Devices. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*
|
|
* Composite pal adapter test.
|
|
* This sketch makes an Arduino send test data to tha Pat80 composite video pal adapter.
|
|
* Connect the video adapter directly to Arduino
|
|
*/
|
|
|
|
const byte CLK = 11; // output active low
|
|
const byte RS = 12; // output low = DATA register, high = COMMAND register
|
|
const byte BUSY = 13; // Input, Active low
|
|
// DATA BUS (Output, active high): 3, 4, 5, 6, 7, 8, 9, 10;
|
|
|
|
void setup() {
|
|
DDRD = DDRD | B11111000; // Port D (arduino pins 3 to 7) is output. In or to preserve serial pins and interrupt pin
|
|
DDRB = B00000111; // Port B (0,1,2) = pins 8,9,10 output
|
|
pinMode(CLK, OUTPUT);
|
|
pinMode(RS, OUTPUT);
|
|
pinMode(BUSY, INPUT);
|
|
|
|
digitalWrite(CLK, HIGH); // Inactive clock
|
|
}
|
|
|
|
void loop() {
|
|
delay(1000);
|
|
send();
|
|
}
|
|
|
|
void send() {
|
|
// Random char
|
|
char c = random(32, 126);
|
|
// Wait for BUSY to become inactive (HIGH)
|
|
//while(digitalRead(BUSY) == LOW) {}
|
|
|
|
// Split byte to two parts and write to ports
|
|
PORTD = c << 3;
|
|
PORTB = c >> 5;
|
|
|
|
// Clock pulse
|
|
digitalWrite(CLK, LOW);
|
|
delay(100);
|
|
digitalWrite(CLK, HIGH);
|
|
}
|