Apple-1-HW/Apple-1-Mini
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Code in working order. The Apple 1 has come to life!

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This commit is contained in:
Ruud van Falier 2017-07-15 18:04:16 +02:00
parent c116cff069
commit 0361b11559
1 changed files with 50 additions and 4 deletions
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54
code/AVR/SerialTest/SerialTest.ino
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@ -7,6 +7,14 @@
#define PB4 A4
#define PB5 A3
#define PB6 A2
#define PA0 5
#define PA1 6
#define PA2 7
#define PA3 8
#define PA4 9
#define PA5 10
#define PA6 11
#define STROBE 12
uint8_t video_data = 0;
uint8_t video_data_pins[] = { PB0, PB1, PB2, PB3, PB4, PB5, PB6 };
@ -14,8 +22,9 @@ uint8_t serial_data;
void setup()
{
pinMode(DA, INPUT);
// Video data pins
pinMode(RDA, OUTPUT);
pinMode(DA, INPUT);
pinMode(PB0, INPUT);
pinMode(PB1, INPUT);
pinMode(PB2, INPUT);
@ -24,6 +33,16 @@ void setup()
pinMode(PB5, INPUT);
pinMode(PB6, INPUT);
// ASCII data pins
pinMode(STROBE, OUTPUT);
pinMode(PA0, OUTPUT);
pinMode(PA1, OUTPUT);
pinMode(PA2, OUTPUT);
pinMode(PA3, OUTPUT);
pinMode(PA4, OUTPUT);
pinMode(PA5, OUTPUT);
pinMode(PA6, OUTPUT);
Serial.begin(9600);
Serial.println("Arduino ready...");
}
@ -36,14 +55,14 @@ void loop()
void process_video_data()
{
digitalWrite(RDA, HIGH); // Tell PIA we are ready to receive data
digitalWrite(RDA, HIGH);
delayMicroseconds(20);
if (digitalRead(DA)) // Is there any data?
if (digitalRead(DA))
{
video_data = 0;
for (int i = 0; i < 7; i++) // Yes, get byte data
for (int i = 0; i < 7; i++)
{
if (digitalRead(video_data_pins[i]))
{
@ -71,6 +90,32 @@ void process_serial_data()
{
serial_data = Serial.read();
if (serial_data == 203) // Uppercase ESC
{
serial_data = 27;
}
if (serial_data >= 97 && serial_data <= 122) // lower case a-z
{
serial_data -= 32;
}
if (serial_data < 96) // Is the character Apple 1 compatible?
{
digitalWrite(PA6, bitRead(serial_data, 6));
digitalWrite(PA5, bitRead(serial_data, 5));
digitalWrite(PA4, bitRead(serial_data, 4));
digitalWrite(PA3, bitRead(serial_data, 3));
digitalWrite(PA2, bitRead(serial_data, 2));
digitalWrite(PA1, bitRead(serial_data, 1));
digitalWrite(PA0, bitRead(serial_data, 0));
digitalWrite(STROBE, HIGH);
delayMicroseconds(20);
digitalWrite(STROBE, LOW);
}
/*
if (serial_data == 13)
{
Serial.println();
@ -79,5 +124,6 @@ void process_serial_data()
{
Serial.print((char)serial_data);
}
*/
}
}