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Arm ps2 mouse interrupt (#6490)

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* ps2_mouse on ARM: an interrupt-version of the ps2-mouse code ported to ARM/chibios

* ps2_mouse on ARM: link EXT callback-channel selection to the user defined PS2_LINE_CLOCK

* ps2_mouse on ARM: replace DELAY_X defines with hardware-agnostic wait_X

* ps2_mouse on ARM: replace chibios-specific defines for the pins/lines with defines from quantum/config_common.h

and drop the '_LINE' component from teh define name

* ps2_mouse on ARM: expose the software-intterupt port as a user editable define

* Update docs/feature_ps2_mouse.md

Co-Authored-By: Hugo van Kemenade <hugovk@users.noreply.github.com>

* Update feature_ps2_mouse.md

* use a define to deduce the PS_DATA_PORT instead

* reduce all-zero extcfg to oneliner

* ps2_mouse: use generic wait instead of avr-delay

* Update docs/feature_ps2_mouse.md

* ps2_mouse: changes for new chibios version

(17.6.0 -> 19.1.0)
replacing the legacy externa-interrupt driver with pal-callbacks

* ps2_mouse: use PLATFORM_KEY

Co-Authored-By: Joel Challis <git@zvecr.com>

* ps2_mouse: clang-format corrections

* ps2_mouse: add systemlocks

using the chibios equivalent to AVRs cli: chSys[Unl|L]ock

Co-authored-by: Johannes <you@example.com>
Co-authored-by: Hugo van Kemenade <hugovk@users.noreply.github.com>
Co-authored-by: Joel Challis <git@zvecr.com>
This commit is contained in:
JohSchneider 2021-08-05 21:51:24 +00:00 committed by GitHub
parent 5bbc527460
commit bcb6e23387
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5 changed files with 172 additions and 20 deletions
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28
docs/feature_ps2_mouse.md
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@ -50,7 +50,7 @@ In your keyboard config.h:
#endif
```
## Interrupt Version :id=interrupt-version
### Interrupt Version (AVR/ATMega32u4) :id=interrupt-version-avr
The following example uses D2 for clock and D5 for data. You can use any INT or PCINT pin for clock, and any pin for data.
@ -88,7 +88,31 @@ In your keyboard config.h:
#endif
```
## USART Version :id=usart-version
### Interrupt Version (ARM chibios) :id=interrupt-version-chibios
Pretty much any two pins can be used for the (software) interrupt variant on ARM cores. The example below uses A8 for clock, and A9 for data.
In rules.mk:
```
PS2_MOUSE_ENABLE = yes
PS2_USE_INT = yes
```
In your keyboard config.h:
```c
#define PS2_CLOCK A8
#define PS2_DATA A9
```
And in the chibios specifig halconf.h:
```c
#define PAL_USE_CALLBACKS TRUE
```
### USART Version :id=usart-version
To use USART on the ATMega32u4, you have to use PD5 for clock and PD2 for data. If one of those are unavailable, you need to use interrupt version.

4
tmk_core/protocol.mk
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@ -14,13 +14,13 @@ endif
ifeq ($(strip $(PS2_USE_INT)), yes)
SRC += protocol/ps2_interrupt.c
SRC += protocol/ps2_io_avr.c
SRC += protocol/ps2_io_$(PLATFORM_KEY).c
OPT_DEFS += -DPS2_USE_INT
endif
ifeq ($(strip $(PS2_USE_USART)), yes)
SRC += protocol/ps2_usart.c
SRC += protocol/ps2_io_avr.c
SRC += protocol/ps2_io_$(PLATFORM_KEY).c
OPT_DEFS += -DPS2_USE_USART
endif

91
tmk_core/protocol/ps2_interrupt.c
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@ -40,11 +40,19 @@ POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdbool.h>
#include <avr/interrupt.h>
#include <util/delay.h>
#if defined(__AVR__)
# include <avr/interrupt.h>
#elif defined(PROTOCOL_CHIBIOS) // TODO: or STM32 ?
// chibiOS headers
# include "ch.h"
# include "hal.h"
#endif
#include "ps2.h"
#include "ps2_io.h"
#include "print.h"
#include "wait.h"
#define WAIT(stat, us, err) \
do { \
@ -61,12 +69,30 @@ static inline void pbuf_enqueue(uint8_t data);
static inline bool pbuf_has_data(void);
static inline void pbuf_clear(void);
#if defined(PROTOCOL_CHIBIOS)
void ps2_interrupt_service_routine(void);
void palCallback(void *arg) { ps2_interrupt_service_routine(); }
# define PS2_INT_INIT() \
{ palSetLineMode(PS2_CLOCK, PAL_MODE_INPUT); } \
while (0)
# define PS2_INT_ON() \
{ \
palEnableLineEvent(PS2_CLOCK, PAL_EVENT_MODE_FALLING_EDGE); \
palSetLineCallback(PS2_CLOCK, palCallback, NULL); \
} \
while (0)
# define PS2_INT_OFF() \
{ palDisableLineEvent(PS2_CLOCK); } \
while (0)
#endif // PROTOCOL_CHIBIOS
void ps2_host_init(void) {
idle();
PS2_INT_INIT();
PS2_INT_ON();
// POR(150-2000ms) plus BAT(300-500ms) may take 2.5sec([3]p.20)
//_delay_ms(2500);
// wait_ms(2500);
}
uint8_t ps2_host_send(uint8_t data) {
@ -77,7 +103,7 @@ uint8_t ps2_host_send(uint8_t data) {
/* terminate a transmission if we have */
inhibit();
_delay_us(100); // 100us [4]p.13, [5]p.50
wait_us(100); // 100us [4]p.13, [5]p.50
/* 'Request to Send' and Start bit */
data_lo();
@ -86,7 +112,6 @@ uint8_t ps2_host_send(uint8_t data) {
/* Data bit[2-9] */
for (uint8_t i = 0; i < 8; i++) {
_delay_us(15);
if (data & (1 << i)) {
parity = !parity;
data_hi();
@ -98,7 +123,7 @@ uint8_t ps2_host_send(uint8_t data) {
}
/* Parity bit */
_delay_us(15);
wait_us(15);
if (parity) {
data_hi();
} else {
@ -108,7 +133,7 @@ uint8_t ps2_host_send(uint8_t data) {
WAIT(clock_lo, 50, 5);
/* Stop bit */
_delay_us(15);
wait_us(15);
data_hi();
/* Ack */
@ -132,7 +157,7 @@ uint8_t ps2_host_recv_response(void) {
// Command may take 25ms/20ms at most([5]p.46, [3]p.21)
uint8_t retry = 25;
while (retry-- && !pbuf_has_data()) {
_delay_ms(1);
wait_ms(1);
}
return pbuf_dequeue();
}
@ -148,7 +173,7 @@ uint8_t ps2_host_recv(void) {
}
}
ISR(PS2_INT_VECT) {
void ps2_interrupt_service_routine(void) {
static enum {
INIT,
START,
@ -218,6 +243,10 @@ RETURN:
return;
}
#if defined(__AVR__)
ISR(PS2_INT_VECT) { ps2_interrupt_service_routine(); }
#endif
/* send LED state to keyboard */
void ps2_host_set_led(uint8_t led) {
ps2_host_send(0xED);
@ -232,8 +261,13 @@ static uint8_t pbuf[PBUF_SIZE];
static uint8_t pbuf_head = 0;
static uint8_t pbuf_tail = 0;
static inline void pbuf_enqueue(uint8_t data) {
#if defined(__AVR__)
uint8_t sreg = SREG;
cli();
#elif defined(PROTOCOL_CHIBIOS)
chSysLockFromISR();
#endif
uint8_t next = (pbuf_head + 1) % PBUF_SIZE;
if (next != pbuf_tail) {
pbuf[pbuf_head] = data;
@ -241,31 +275,66 @@ static inline void pbuf_enqueue(uint8_t data) {
} else {
print("pbuf: full\n");
}
#if defined(__AVR__)
SREG = sreg;
#elif defined(PROTOCOL_CHIBIOS)
chSysUnlockFromISR();
#endif
}
static inline uint8_t pbuf_dequeue(void) {
uint8_t val = 0;
#if defined(__AVR__)
uint8_t sreg = SREG;
cli();
#elif defined(PROTOCOL_CHIBIOS)
chSysLock();
#endif
if (pbuf_head != pbuf_tail) {
val = pbuf[pbuf_tail];
pbuf_tail = (pbuf_tail + 1) % PBUF_SIZE;
}
#if defined(__AVR__)
SREG = sreg;
#elif defined(PROTOCOL_CHIBIOS)
chSysUnlock();
#endif
return val;
}
static inline bool pbuf_has_data(void) {
#if defined(__AVR__)
uint8_t sreg = SREG;
cli();
#elif defined(PROTOCOL_CHIBIOS)
chSysLock();
#endif
bool has_data = (pbuf_head != pbuf_tail);
SREG = sreg;
#if defined(__AVR__)
SREG = sreg;
#elif defined(PROTOCOL_CHIBIOS)
chSysUnlock();
#endif
return has_data;
}
static inline void pbuf_clear(void) {
#if defined(__AVR__)
uint8_t sreg = SREG;
cli();
#elif defined(PROTOCOL_CHIBIOS)
chSysLock();
#endif
pbuf_head = pbuf_tail = 0;
SREG = sreg;
#if defined(__AVR__)
SREG = sreg;
#elif defined(PROTOCOL_CHIBIOS)
chSysUnlock();
#endif
}

55
tmk_core/protocol/ps2_io_chibios.c Normal file
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@ -0,0 +1,55 @@
#include <stdbool.h>
#include "ps2_io.h"
// chibiOS headers
#include "ch.h"
#include "hal.h"
/* Check port settings for clock and data line */
#if !(defined(PS2_CLOCK))
# error "PS/2 clock setting is required in config.h"
#endif
#if !(defined(PS2_DATA))
# error "PS/2 data setting is required in config.h"
#endif
/*
* Clock
*/
void clock_init(void) {}
void clock_lo(void) {
palSetLineMode(PS2_CLOCK, PAL_MODE_OUTPUT_OPENDRAIN);
palWriteLine(PS2_CLOCK, PAL_LOW);
}
void clock_hi(void) {
palSetLineMode(PS2_CLOCK, PAL_MODE_OUTPUT_OPENDRAIN);
palWriteLine(PS2_CLOCK, PAL_HIGH);
}
bool clock_in(void) {
palSetLineMode(PS2_CLOCK, PAL_MODE_INPUT);
return palReadLine(PS2_CLOCK);
}
/*
* Data
*/
void data_init(void) {}
void data_lo(void) {
palSetLineMode(PS2_DATA, PAL_MODE_OUTPUT_OPENDRAIN);
palWriteLine(PS2_DATA, PAL_LOW);
}
void data_hi(void) {
palSetLineMode(PS2_DATA, PAL_MODE_OUTPUT_OPENDRAIN);
palWriteLine(PS2_DATA, PAL_HIGH);
}
bool data_in(void) {
palSetLineMode(PS2_DATA, PAL_MODE_INPUT);
return palReadLine(PS2_DATA);
}

14
tmk_core/protocol/ps2_mouse.c
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@ -16,9 +16,13 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdbool.h>
#include <avr/io.h>
#include <util/delay.h>
#if defined(__AVR__)
# include <avr/io.h>
#endif
#include "ps2_mouse.h"
#include "wait.h"
#include "host.h"
#include "timer.h"
#include "print.h"
@ -42,7 +46,7 @@ static inline void ps2_mouse_scroll_button_task(report_mouse_t *mouse_report);
void ps2_mouse_init(void) {
ps2_host_init();
_delay_ms(PS2_MOUSE_INIT_DELAY); // wait for powering up
wait_ms(PS2_MOUSE_INIT_DELAY); // wait for powering up
PS2_MOUSE_SEND(PS2_MOUSE_RESET, "ps2_mouse_init: sending reset");
@ -210,7 +214,7 @@ static inline void ps2_mouse_enable_scrolling(void) {
PS2_MOUSE_SEND(PS2_MOUSE_SET_SAMPLE_RATE, "Set sample rate");
PS2_MOUSE_SEND(80, "80");
PS2_MOUSE_SEND(PS2_MOUSE_GET_DEVICE_ID, "Finished enabling scroll wheel");
_delay_ms(20);
wait_ms(20);
}
#define PRESS_SCROLL_BUTTONS mouse_report->buttons |= (PS2_MOUSE_SCROLL_BTN_MASK)
@ -252,7 +256,7 @@ static inline void ps2_mouse_scroll_button_task(report_mouse_t *mouse_report) {
if (scroll_state == SCROLL_BTN && timer_elapsed(scroll_button_time) < PS2_MOUSE_SCROLL_BTN_SEND) {
PRESS_SCROLL_BUTTONS;
host_mouse_send(mouse_report);
_delay_ms(100);
wait_ms(100);
RELEASE_SCROLL_BUTTONS;
}
#endif