Apple-1-HW/RC6502-Apple-1-Replica
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Adapted output so it works in PuTTY

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Unknown 2017-06-01 21:35:01 +02:00
parent c9558608bf
commit 972f4c3b06
1 changed files with 80 additions and 48 deletions
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128
RC6502 Serial IO/pia_bridge/pia_bridge.ino
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@ -1,32 +1,30 @@
#include <SPI.h> #include <SPI.h>
#include <MCP23S17.h> #include <MCP23S17.h>
#define debug 0
#define IO_SS 10 #define IO_SS 10
#define IO_VIDEO 0 #define IO_VIDEO 0
#define IO_VIDEO_D0 0 #define IO_VIDEO_D0 0
#define IO_VIDEO_D6 6 #define IO_VIDEO_D6 6
#define VIDEO_RDA 5
#define VIDEO_DA 3
#define IO_KBD 1 #define IO_KBD 1
#define IO_KBD_D0 8 #define IO_KBD_D0 8
#define IO_KBD_D6 14 #define IO_KBD_D6 14
#define IO_KBD_DA 15 #define IO_KBD_DA 15
#define KBD_READY 2 #define KBD_READY 2
#define KBD_STROBE 4 #define KBD_STROBE 4
#define VIDEO_RDA 5
#define VIDEO_DA 3
MCP23S17 bridge(&SPI, IO_SS, 0); MCP23S17 bridge(&SPI, IO_SS, 0);
void setup() { void setup() {
Serial.begin(115200); Serial.begin(115200);
Serial.println("Initializing...");
configure_pins(); configure_pins();
configure_bridge(); configure_bridge();
output_status(); output_status();
Serial.println("Initialization done!");
} }
void configure_pins() { void configure_pins() {
@ -52,55 +50,51 @@ void configure_bridge() {
} }
void output_status() { void output_status() {
Serial.print("Video DA: "); Serial.println("RC6502 Apple 1 Replica");
Serial.println(digitalRead(VIDEO_DA));
Serial.print("Video D0-D6: 0x");
Serial.println(bridge.readPort(IO_VIDEO) & 127, HEX);
Serial.print("KBD RDY: "); debug_value("Video DA", digitalRead(VIDEO_DA));
Serial.println(digitalRead(KBD_READY)); debug_value("Video D0-D6", bridge.readPort(IO_VIDEO) & 127);
debug_value("Keyboard RDY", digitalRead(KBD_READY));
}
void debug_value(String description, byte value) {
debug_value(description, value, 1);
}
void debug_value(String description, byte value, int level) {
if (debug < level) return;
Serial.print(description);
Serial.print(": ");
print_hex(value);
}
void print_hex(byte value) {
print_hex(value, true);
}
void print_hex(byte value, bool newline) {
if (value <= 0xF) {
Serial.print("0x0");
} else {
Serial.print("0x");
}
if (newline) Serial.println(value, HEX);
else Serial.print(value, HEX);
} }
void serial_receive() { void serial_receive() {
if (Serial.available() > 0) { if (Serial.available() > 0) {
pia_send( Serial.read() ); int c = Serial.read();
debug_value("PIA RX", c, 10);
pia_send(c);
} }
} }
void serial_transmit() { void pia_send(int c) {
digitalWrite(VIDEO_RDA, HIGH);
delay(12);
if (digitalRead(VIDEO_DA) == HIGH) {
char incomingByte = bridge.readPort(IO_VIDEO) & 127;
digitalWrite(VIDEO_RDA, LOW);
delay(12);
//Serial.print("RX ");
//print_chr(incomingByte);
Serial.print(incomingByte);
}
}
void print_chr(char c) {
Serial.print((char) c);
Serial.print(" (0x");
Serial.print(c, HEX);
Serial.println(")");
}
void pia_send(byte c) {
/* Make sure STROBE signal is off */ /* Make sure STROBE signal is off */
digitalWrite(KBD_STROBE, LOW); digitalWrite(KBD_STROBE, LOW);
c = map_to_ascii(c);
/* Convert ESC key */
if (c == 203) {
c = 27;
}
/* Convert lowercase keys to UPPERCASE */
if (c > 96 && c < 123) {
c -= 32;
}
/* Output the actual keys as long as it's supported */ /* Output the actual keys as long as it's supported */
if (c < 96) { if (c < 96) {
@ -120,8 +114,46 @@ void pia_send(byte c) {
delay(1); delay(1);
} }
*/ */
//Serial.print("TX "); }
//print_chr(c); }
char map_to_ascii(int c) {
/* Convert ESC key */
if (c == 203) {
c = 27;
}
/* Ctrl A-Z */
if (c > 576 && c < 603) {
c -= 576;
}
/* Convert lowercase keys to UPPERCASE */
if (c > 96 && c < 123) {
c -= 32;
}
return c;
}
void serial_transmit() {
digitalWrite(VIDEO_RDA, HIGH);
if (digitalRead(VIDEO_DA) == HIGH) {
char c = bridge.readPort(IO_VIDEO) & 127;
debug_value("PIA TX", c, 10);
digitalWrite(VIDEO_RDA, LOW);
delay(12);
send_ascii(c);
}
}
char send_ascii(char c) {
switch (c) {
case 0x0d: Serial.println(); /* Replace CR with LF */
default:
Serial.print(c);
} }
} }