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-rw-r--r--quantum/process_keycode/process_joystick.c168
-rw-r--r--quantum/process_keycode/process_joystick.h11
2 files changed, 179 insertions, 0 deletions
diff --git a/quantum/process_keycode/process_joystick.c b/quantum/process_keycode/process_joystick.c
new file mode 100644
index 000000000..c12f75685
--- /dev/null
+++ b/quantum/process_keycode/process_joystick.c
@@ -0,0 +1,168 @@
+#include "joystick.h"
+#include "process_joystick.h"
+
+#include "analog.h"
+
+#include <string.h>
+#include <math.h>
+
+bool process_joystick_buttons(uint16_t keycode, keyrecord_t *record);
+
+bool process_joystick(uint16_t keycode, keyrecord_t *record) {
+ if (process_joystick_buttons(keycode, record) && (joystick_status.status & JS_UPDATED) > 0) {
+ send_joystick_packet(&joystick_status);
+ joystick_status.status &= ~JS_UPDATED;
+ }
+
+ return true;
+}
+
+__attribute__((weak))
+void joystick_task(void) {
+ if (process_joystick_analogread() && (joystick_status.status & JS_UPDATED)) {
+ send_joystick_packet(&joystick_status);
+ joystick_status.status &= ~JS_UPDATED;
+ }
+}
+
+bool process_joystick_buttons(uint16_t keycode, keyrecord_t *record) {
+ if (keycode < JS_BUTTON0 || keycode > JS_BUTTON_MAX) {
+ return true;
+ } else {
+ if (record->event.pressed) {
+ joystick_status.buttons[(keycode - JS_BUTTON0) / 8] |= 1 << (keycode % 8);
+ } else {
+ joystick_status.buttons[(keycode - JS_BUTTON0) / 8] &= ~(1 << (keycode % 8));
+ }
+
+ joystick_status.status |= JS_UPDATED;
+ }
+
+ return true;
+}
+
+uint16_t savePinState(pin_t pin) {
+#ifdef __AVR__
+ uint8_t pinNumber = pin & 0xF;
+ return ((PORTx_ADDRESS(pin) >> pinNumber) & 0x1) << 1 | ((DDRx_ADDRESS(pin) >> pinNumber) & 0x1);
+#elif defined(PROTOCOL_CHIBIOS)
+ /*
+ The pin configuration is backed up in the following format :
+ bit 15 9 8 7 6 5 4 3 2 1 0
+ |unused|ODR|IDR|PUPDR|OSPEEDR|OTYPER|MODER|
+ */
+ return (( PAL_PORT(pin)->MODER >> (2*PAL_PAD(pin))) & 0x3)
+ | (((PAL_PORT(pin)->OTYPER >> (1*PAL_PAD(pin))) & 0x1) << 2)
+ | (((PAL_PORT(pin)->OSPEEDR >> (2*PAL_PAD(pin))) & 0x3) << 3)
+ | (((PAL_PORT(pin)->PUPDR >> (2*PAL_PAD(pin))) & 0x3) << 5)
+ | (((PAL_PORT(pin)->IDR >> (1*PAL_PAD(pin))) & 0x1) << 7)
+ | (((PAL_PORT(pin)->ODR >> (1*PAL_PAD(pin))) & 0x1) << 8);
+#else
+ return 0;
+#endif
+}
+
+void restorePinState(pin_t pin, uint16_t restoreState) {
+#if defined(PROTOCOL_LUFA)
+ uint8_t pinNumber = pin & 0xF;
+ PORTx_ADDRESS(pin) = (PORTx_ADDRESS(pin) & ~_BV(pinNumber)) | (((restoreState >> 1) & 0x1) << pinNumber);
+ DDRx_ADDRESS(pin) = (DDRx_ADDRESS(pin) & ~_BV(pinNumber)) | ((restoreState & 0x1) << pinNumber);
+#elif defined(PROTOCOL_CHIBIOS)
+ PAL_PORT(pin)->MODER = (PAL_PORT(pin)->MODER & ~(0x3<< (2*PAL_PAD(pin)))) | (restoreState & 0x3) << (2*PAL_PAD(pin));
+ PAL_PORT(pin)->OTYPER = (PAL_PORT(pin)->OTYPER & ~(0x1<< (1*PAL_PAD(pin)))) | ((restoreState>>2) & 0x1) << (1*PAL_PAD(pin));
+ PAL_PORT(pin)->OSPEEDR= (PAL_PORT(pin)->OSPEEDR & ~(0x3<< (2*PAL_PAD(pin)))) | ((restoreState>>3) & 0x3) << (2*PAL_PAD(pin));
+ PAL_PORT(pin)->PUPDR = (PAL_PORT(pin)->PUPDR & ~(0x3<< (2*PAL_PAD(pin)))) | ((restoreState>>5) & 0x3) << (2*PAL_PAD(pin));
+ PAL_PORT(pin)->IDR = (PAL_PORT(pin)->IDR & ~(0x1<< (1*PAL_PAD(pin)))) | ((restoreState>>7) & 0x1) << (1*PAL_PAD(pin));
+ PAL_PORT(pin)->ODR = (PAL_PORT(pin)->ODR & ~(0x1<< (1*PAL_PAD(pin)))) | ((restoreState>>8) & 0x1) << (1*PAL_PAD(pin));
+#else
+ return;
+#endif
+}
+
+__attribute__((weak)) bool process_joystick_analogread() { return process_joystick_analogread_quantum(); }
+
+bool process_joystick_analogread_quantum() {
+#if JOYSTICK_AXES_COUNT > 0
+ for (int axis_index = 0; axis_index < JOYSTICK_AXES_COUNT; ++axis_index) {
+ if (joystick_axes[axis_index].input_pin == JS_VIRTUAL_AXIS) {
+ continue;
+ }
+
+ // save previous input pin status as well
+ uint16_t inputSavedState = savePinState(joystick_axes[axis_index].input_pin);
+
+ // disable pull-up resistor
+ writePinLow(joystick_axes[axis_index].input_pin);
+
+ // if pin was a pull-up input, we need to uncharge it by turning it low
+ // before making it a low input
+ setPinOutput(joystick_axes[axis_index].input_pin);
+
+ wait_us(10);
+
+ // save and apply output pin status
+ uint16_t outputSavedState = 0;
+ if (joystick_axes[axis_index].output_pin != JS_VIRTUAL_AXIS) {
+ // save previous output pin status
+ outputSavedState = savePinState(joystick_axes[axis_index].output_pin);
+
+ setPinOutput(joystick_axes[axis_index].output_pin);
+ writePinHigh(joystick_axes[axis_index].output_pin);
+ }
+
+ uint16_t groundSavedState = 0;
+ if (joystick_axes[axis_index].ground_pin != JS_VIRTUAL_AXIS) {
+ // save previous output pin status
+ groundSavedState = savePinState(joystick_axes[axis_index].ground_pin);
+
+ setPinOutput(joystick_axes[axis_index].ground_pin);
+ writePinLow(joystick_axes[axis_index].ground_pin);
+ }
+
+ wait_us(10);
+
+ setPinInput(joystick_axes[axis_index].input_pin);
+
+ wait_us(10);
+
+# if defined(__AVR__) || defined(PROTOCOL_CHIBIOS)
+ int16_t axis_val = analogReadPin(joystick_axes[axis_index].input_pin);
+# else
+ // default to resting position
+ int16_t axis_val = joystick_axes[axis_index].mid_digit;
+# endif
+
+ //test the converted value against the lower range
+ int32_t ref = joystick_axes[axis_index].mid_digit;
+ int32_t range = joystick_axes[axis_index].min_digit;
+ int32_t ranged_val = ((axis_val - ref) * -127) / (range - ref) ;
+
+ if (ranged_val > 0) {
+ //the value is in the higher range
+ range = joystick_axes[axis_index].max_digit;
+ ranged_val = ((axis_val - ref) * 127) / (range - ref);
+ }
+
+ //clamp the result in the valid range
+ ranged_val = ranged_val < -127 ? -127 : ranged_val;
+ ranged_val = ranged_val > 127 ? 127 : ranged_val;
+
+ if (ranged_val != joystick_status.axes[axis_index]) {
+ joystick_status.axes[axis_index] = ranged_val;
+ joystick_status.status |= JS_UPDATED;
+ }
+
+ // restore output, ground and input status
+ if (joystick_axes[axis_index].output_pin != JS_VIRTUAL_AXIS) {
+ restorePinState(joystick_axes[axis_index].output_pin, outputSavedState);
+ }
+ if (joystick_axes[axis_index].ground_pin != JS_VIRTUAL_AXIS) {
+ restorePinState(joystick_axes[axis_index].ground_pin, groundSavedState);
+ }
+
+ restorePinState(joystick_axes[axis_index].input_pin, inputSavedState);
+ }
+
+#endif
+ return true;
+}
diff --git a/quantum/process_keycode/process_joystick.h b/quantum/process_keycode/process_joystick.h
new file mode 100644
index 000000000..7a8b82913
--- /dev/null
+++ b/quantum/process_keycode/process_joystick.h
@@ -0,0 +1,11 @@
+#pragma once
+
+#include <stdint.h>
+#include "quantum.h"
+
+bool process_joystick(uint16_t keycode, keyrecord_t *record);
+
+void joystick_task(void);
+
+bool process_joystick_analogread(void);
+bool process_joystick_analogread_quantum(void);
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