aiie/teensy/teensy-paddles.cpp
2017-02-20 13:55:16 -05:00

54 lines
1.1 KiB
C++

#include "teensy-paddles.h"
/* C061: Open Apple (Paddle 0 button pressed if &= 0x80)
* C062: Closed Apple (Paddle 1 button pressed if &= 0x80)
* C064: PADDLE0 (sets bit 0x80 when value reached, increments of 11 us)
* C065: PADDLE1 (sets bit 0x80 when value reached, increments of 11 us)
* C070: "start reading paddle data" - "may take up to 3 milliseconds"
*/
#define PADDLE0 A24
#define PADDLE1 A23
#include "globals.h"
TeensyPaddles::TeensyPaddles()
{
pinMode(PADDLE0, INPUT);
pinMode(PADDLE1, INPUT);
}
TeensyPaddles::~TeensyPaddles()
{
}
uint8_t TeensyPaddles::paddle0()
{
uint8_t raw = 255 - analogRead(PADDLE0);
return raw;
// 40 .. 200 on the old joystick
if (raw >200) raw = 200;
if (raw < 40) raw = 40;
return map(raw, 40, 200, 0, 255);
}
uint8_t TeensyPaddles::paddle1()
{
uint8_t raw = analogRead(PADDLE1);
return raw;
// 60..200 on the old joystick
if (raw >200) raw = 200;
if (raw < 60) raw = 60;
return map(raw, 60, 200, 0, 255);
}
void TeensyPaddles::startReading()
{
g_vm->triggerPaddleInCycles(0, 12 * paddle0());
g_vm->triggerPaddleInCycles(1, 12 * paddle1());
}