qmk_firmware/drivers/avr/analog.c
a-chol d4be07dad3 Hid joystick interface (#4226)
* add support for hid gamepad interface
add documentation for HID joystick
Add joystick_task to read analog axes values even when no key is pressed or release. update doc
Update docs/feature_joystick.md
Manage pin setup and read to maintain matrix scan after analog read

* Incorporates patches and changes to HID reporting

There are some patches provided by @a-chol incorporated on this commit,
and also some changes I made to the HID Report structure.

The most interesting is the one dealing with number of buttons: Linux
doesn't seem to care, but Windows requires the HID structure to be byte
aligned (that's in the spec). So if one declares 8/16/32... buttons they
should not have any issues, but this is what happens when you have 9
buttons:

```
 bits |0|1|2|3|4|5|6|7|
      |*|*|*|*|*|*|*|*| axis 0 (report size 8)
      |*|*|*|*|*|*|*|*| ...
      |*|*|*|*|*|*|*|*|
      |*|*|*|*|*|*|*|*|
      |*|*|*|*|*|*|*|*|
      |*|*|*|*|*|*|*|*|
      |*|*|*|*|*|*|*|*| axis 6
      |*|*|*|*|*|*|*|*| first 8 buttons (report size 1)
      |*| | | | | | | | last of 9 buttons, not aligned
```

So for that I added a conditonal that will add a number of reports with
size 1 to make sure it aligns to the next multiple of 8. Those reports
send dummy inputs that don't do anything aside from aligning the data.

Tested on Linux, Windows 10 and Street Fighter (where the joystick is
recognized as direct-input)

* Add save and restore of each pin used in reading joystick (AVR).
Allow output pin to be JS_VIRTUAL_AXIS if the axis is connected to Vcc
instead of an output pin from the MCU.

Fix joystick report id

Fix broken v-usb hid joystick interface. Make it more resilient to unusual settings (none multiple of eight button count, 0 buttons or 0 axes)

Correct adc reading for multiple axes. Piecewise range conversion for uncentered raw value range. Input, output and ground pin configuration per axis.

Documentation fixes

* Fix port addressing for joystick analog read

* The other required set of changes
As per the PR, the changes still holding it up.
Add onekey for testing.
Fix ARM builds.
Fix device descriptor when either axes or buttons is zero.
Add compile-time check for at least one axis or button.
Move definition to try to fix conflict.
PR review comments.
qmk cformat

* avoid float functions to compute range mapping for axis adc reading

* Remove V-USB support for now. Updated docs accordingly.

* Update tmk_core/protocol/lufa/lufa.c

Co-Authored-By: Ryan <fauxpark@gmail.com>

* Update tmk_core/protocol/usb_descriptor.c

Co-Authored-By: Ryan <fauxpark@gmail.com>

* Update tmk_core/protocol/usb_descriptor.c

Co-Authored-By: Ryan <fauxpark@gmail.com>

* Update tmk_core/protocol/usb_descriptor.c

Co-Authored-By: Ryan <fauxpark@gmail.com>

* Add support for joystick adc reading for stm32 MCUs. Fix joystick hid report sending for chibios

* Fix HID joystick report sending for ChibiOS.
Add one analog axis to the onekey:joystick keymap.
Fix pin state save and restore during joystick analog read for STM32
MCUs.

* Update tmk_core/protocol/chibios/usb_main.c

Co-Authored-By: Ryan <fauxpark@gmail.com>

* Update tmk_core/protocol/lufa/lufa.c

Co-Authored-By: Ryan <fauxpark@gmail.com>

* Add missing mcuconf.h and halconf.h to onekey:joystick keymap.
Add suggested fixes from PR.

* Switch saveState and restoreState signature to use pin_t type.
onekey:joystick : add a second axis, virtual and programmatically animated.

* Update docs/feature_joystick.md

Co-Authored-By: Ryan <fauxpark@gmail.com>

* Update docs/feature_joystick.md

Co-Authored-By: Ryan <fauxpark@gmail.com>

* Add PR corrections

* Remove halconf.h and mcuconf.h from onekey keymaps

* Change ADC_PIN to A0

Co-authored-by: achol <allecooll@hotmail.com>
Co-authored-by: José Júnior <jose.junior@gmail.com>
Co-authored-by: a-chol <achol@notamail.com>
Co-authored-by: Nick Brassel <nick@tzarc.org>
Co-authored-by: Ryan <fauxpark@gmail.com>
2020-08-29 14:30:02 -07:00

138 lines
5.2 KiB
C

/* Copyright 2015 Jack Humbert
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <avr/io.h>
#include <avr/pgmspace.h>
#include <stdint.h>
#include "analog.h"
static uint8_t aref = ADC_REF_POWER;
void analogReference(uint8_t mode) { aref = mode & (_BV(REFS1) | _BV(REFS0)); }
// Arduino compatible pin input
int16_t analogRead(uint8_t pin) {
#if defined(__AVR_ATmega32U4__)
// clang-format off
static const uint8_t PROGMEM pin_to_mux[] = {
//A0 A1 A2 A3 A4 A5
//F7 F6 F5 F4 F1 F0
0x07, 0x06, 0x05, 0x04, 0x01, 0x00,
//A6 A7 A8 A9 A10 A11
//D4 D7 B4 B5 B6 D6
0x20, 0x22, 0x23, 0x24, 0x25, 0x21
};
// clang-format on
if (pin >= 12) return 0;
return adc_read(pgm_read_byte(pin_to_mux + pin));
#elif defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__) || defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__) || defined(__AVR_ATmega328P__) || defined(__AVR_ATmega328__)
if (pin >= 8) return 0;
return adc_read(pin);
#else
return 0;
#endif
}
int16_t analogReadPin(pin_t pin) { return adc_read(pinToMux(pin)); }
uint8_t pinToMux(pin_t pin) {
switch (pin) {
// clang-format off
#if defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__) || defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__)
case F0: return 0; // ADC0
case F1: return _BV(MUX0); // ADC1
case F2: return _BV(MUX1); // ADC2
case F3: return _BV(MUX1) | _BV(MUX0); // ADC3
case F4: return _BV(MUX2); // ADC4
case F5: return _BV(MUX2) | _BV(MUX0); // ADC5
case F6: return _BV(MUX2) | _BV(MUX1); // ADC6
case F7: return _BV(MUX2) | _BV(MUX1) | _BV(MUX0); // ADC7
default: return _BV(MUX4) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1) | _BV(MUX0); // 0V
#elif defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__)
case F0: return 0; // ADC0
case F1: return _BV(MUX0); // ADC1
case F4: return _BV(MUX2); // ADC4
case F5: return _BV(MUX2) | _BV(MUX0); // ADC5
case F6: return _BV(MUX2) | _BV(MUX1); // ADC6
case F7: return _BV(MUX2) | _BV(MUX1) | _BV(MUX0); // ADC7
case D4: return _BV(MUX5); // ADC8
case D6: return _BV(MUX5) | _BV(MUX0); // ADC9
case D7: return _BV(MUX5) | _BV(MUX1); // ADC10
case B4: return _BV(MUX5) | _BV(MUX1) | _BV(MUX0); // ADC11
case B5: return _BV(MUX5) | _BV(MUX2); // ADC12
case B6: return _BV(MUX5) | _BV(MUX2) | _BV(MUX0); // ADC13
default: return _BV(MUX4) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1) | _BV(MUX0); // 0V
#elif defined(__AVR_ATmega32A__)
case A0: return 0; // ADC0
case A1: return _BV(MUX0); // ADC1
case A2: return _BV(MUX1); // ADC2
case A3: return _BV(MUX1) | _BV(MUX0); // ADC3
case A4: return _BV(MUX2); // ADC4
case A5: return _BV(MUX2) | _BV(MUX0); // ADC5
case A6: return _BV(MUX2) | _BV(MUX1); // ADC6
case A7: return _BV(MUX2) | _BV(MUX1) | _BV(MUX0); // ADC7
default: return _BV(MUX4) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1) | _BV(MUX0); // 0V
#elif defined(__AVR_ATmega328P__) || defined(__AVR_ATmega328__)
case C0: return 0; // ADC0
case C1: return _BV(MUX0); // ADC1
case C2: return _BV(MUX1); // ADC2
case C3: return _BV(MUX1) | _BV(MUX0); // ADC3
case C4: return _BV(MUX2); // ADC4
case C5: return _BV(MUX2) | _BV(MUX0); // ADC5
// ADC7:6 not present in DIP package and not shared by GPIO pins
default: return _BV(MUX3) | _BV(MUX2) | _BV(MUX1) | _BV(MUX0); // 0V
#endif
// clang-format on
}
return 0;
}
int16_t adc_read(uint8_t mux) {
uint16_t low;
// Enable ADC and configure prescaler
ADCSRA = _BV(ADEN) | ADC_PRESCALER;
#if defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__)
// High speed mode and ADC8-13
ADCSRB = _BV(ADHSM) | (mux & _BV(MUX5));
#elif defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__) || defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__)
// High speed mode only
ADCSRB = _BV(ADHSM);
#endif
// Configure mux input
#if defined(MUX4)
ADMUX = aref | (mux & (_BV(MUX4) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1) | _BV(MUX0)));
#else
ADMUX = aref | (mux & (_BV(MUX3) | _BV(MUX2) | _BV(MUX1) | _BV(MUX0)));
#endif
// Start the conversion
ADCSRA |= _BV(ADSC);
// Wait for result
while (ADCSRA & _BV(ADSC))
;
// Must read LSB first
low = ADCL;
// Must read MSB only once!
low |= (ADCH << 8);
// turn off the ADC
ADCSRA &= ~(1 << ADEN);
return low;
}