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PS/2 library receives data partially by interrupt

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example_keyboards
tmk 14 years ago
parent 0632618d29
commit 04f351b802
11 changed files with 275 additions and 106 deletions
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181
ps2.c
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@ -1,5 +1,5 @@
/*
Copyright (c) 2010 Jun WAKO <wakojun@gmail.com>
Copyright (c) 2010,2011 Jun WAKO <wakojun@gmail.com>
This software is licensed with a Modified BSD License.
All of this is supposed to be Free Software, Open Source, DFSG-free,
@ -36,12 +36,13 @@ POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdbool.h>
#include <avr/io.h>
#include <avr/interrupt.h>
#include <util/delay.h>
#include "ps2.h"
#include "print.h"
#include "debug.h"
static uint8_t recv_data(void);
static inline void clock_lo(void);
static inline void clock_hi(void);
static inline bool clock_in(void);
@ -52,6 +53,8 @@ static inline uint16_t wait_clock_lo(uint16_t us);
static inline uint16_t wait_clock_hi(uint16_t us);
static inline uint16_t wait_data_lo(uint16_t us);
static inline uint16_t wait_data_hi(uint16_t us);
static inline void idle(void);
static inline void inhibit(void);
/*
@ -79,38 +82,38 @@ http://www.mcamafia.de/pdf/ibm_hitrc07.pdf
} \
} while (0)
#define WAIT_NORETRY(stat, us, err) do { \
if (!wait_##stat(us)) { \
ps2_error = err; \
return 0; \
} \
} while (0)
uint8_t ps2_error = PS2_ERR_NONE;
void ps2_host_init(void)
{
/* inhibit */
clock_lo();
data_hi();
#ifdef PS2_INT_ENABLE
PS2_INT_ENABLE();
idle();
#else
inhibit();
#endif
}
uint8_t ps2_host_send(uint8_t data)
{
bool parity = true;
bool parity;
RETRY:
parity = true;
ps2_error = 0;
/* request to send */
clock_lo();
/* terminate a transmission if we have */
inhibit();
_delay_us(100);
/* start bit [1] */
data_lo();
clock_hi();
WAIT(clock_lo, 15000, 1);
/* data [2-9] */
for (uint8_t i = 0; i < 8; i++) {
_delay_us(15);
if (data&(1<<i)) {
parity = !parity;
data_hi();
@ -121,44 +124,145 @@ uint8_t ps2_host_send(uint8_t data)
WAIT(clock_lo, 50, 3);
}
/* parity [10] */
_delay_us(15);
if (parity) { data_hi(); } else { data_lo(); }
WAIT(clock_hi, 50, 4);
WAIT(clock_lo, 50, 5);
/* stop bit [11] */
_delay_us(15);
data_hi();
/* ack [12] */
WAIT(data_lo, 50, 6);
WAIT(clock_lo, 50, 7);
/* wait for idle state */
WAIT(clock_hi, 50, 8);
WAIT(data_hi, 50, 9);
/* inhibit device to send */
clock_lo();
uint8_t res = ps2_host_recv_response();
if (res == 0xFE && data != 0xFE)
goto RETRY;
return 1;
inhibit();
return res;
ERROR:
/* inhibit device to send */
data_hi();
clock_lo();
inhibit();
return 0;
}
uint8_t ps2_host_recv(void)
/* receive data when host want else inhibit communication */
uint8_t ps2_host_recv_response(void)
{
uint8_t data = 0;
bool parity = true;
ps2_error = 0;
/* terminate a transmission if we have */
clock_lo();
inhibit();
_delay_us(100);
/* release lines(idle state) */
clock_hi();
data_hi();
idle();
/* wait start bit */
wait_clock_lo(2000);
data = recv_data();
inhibit();
return data;
}
#ifndef PS2_INT_VECT
uint8_t ps2_host_recv(void)
{
return ps2_host_recv_response();
}
#else
/* ring buffer to store ps/2 key data */
#define PBUF_SIZE 8
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 (!data)
return;
uint8_t next = (pbuf_head + 1) % PBUF_SIZE;
if (next != pbuf_tail) {
pbuf[pbuf_head] = data;
pbuf_head = next;
} else {
print("pbuf: full\n");
}
}
static inline uint8_t pbuf_dequeue(void)
{
uint8_t val = 0;
uint8_t sreg = SREG;
cli();
if (pbuf_head != pbuf_tail) {
val = pbuf[pbuf_tail];
pbuf_tail = (pbuf_tail + 1) % PBUF_SIZE;
}
SREG = sreg;
return val;
}
/* get data received by interrupt */
uint8_t ps2_host_recv(void)
{
return pbuf_dequeue();
}
ISR(PS2_INT_VECT)
{
PORTC = 0xFF;
/* interrupt means start bit comes */
pbuf_enqueue(recv_data());
/* release lines(idle state) */
idle();
_delay_us(5);
PORTC = 0x00;
}
#endif
/*
static void ps2_reset(void)
{
ps2_host_send(0xFF);
if (ps2_host_recv_response() == 0xFA) {
_delay_ms(1000);
ps2_host_recv_response();
}
}
*/
/* send LED state to keyboard */
void ps2_host_set_led(uint8_t led)
{
#ifdef PS2_INT_DISABLE
PS2_INT_DISABLE();
#endif
ps2_host_send(0xED);
ps2_host_recv_response();
ps2_host_send(led);
ps2_host_recv_response();
#ifdef PS2_INT_ENABLE
PS2_INT_ENABLE();
idle();
#endif
}
/* called after start bit comes */
static uint8_t recv_data(void)
{
uint8_t data = 0;
bool parity = true;
ps2_error = 0;
/* start bit [1] */
WAIT(clock_lo, 2000, 1); // How long should we wait?
WAIT(clock_lo, 1, 1);
WAIT(data_lo, 1, 2);
WAIT(clock_hi, 50, 3);
@ -185,18 +289,11 @@ uint8_t ps2_host_recv(void)
WAIT(data_hi, 1, 9);
WAIT(clock_hi, 50, 10);
/* inhibit device to send */
clock_lo();
return data;
ERROR:
/* inhibit device to send */
data_hi();
clock_lo();
return 0;
}
static inline void clock_lo()
{
PS2_CLOCK_PORT &= ~(1<<PS2_CLOCK_BIT);
@ -252,3 +349,17 @@ static inline uint16_t wait_data_hi(uint16_t us)
while (!data_in() && us) { asm(""); _delay_us(1); us--; }
return us;
}
/* idle state that device can send */
static inline void idle(void)
{
clock_hi();
data_hi();
}
/* inhibit device to send */
static inline void inhibit(void)
{
clock_lo();
data_hi();
}

10
ps2.h
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@ -1,5 +1,5 @@
/*
Copyright (c) 2010 Jun WAKO <wakojun@gmail.com>
Copyright (c) 2010,2011 Jun WAKO <wakojun@gmail.com>
This software is licensed with a Modified BSD License.
All of this is supposed to be Free Software, Open Source, DFSG-free,
@ -66,11 +66,13 @@ POSSIBILITY OF SUCH DAMAGE.
extern uint8_t ps2_error;
/* host side */
/* host role */
void ps2_host_init(void);
uint8_t ps2_host_send(uint8_t);
uint8_t ps2_host_send(uint8_t data);
uint8_t ps2_host_recv_response(void);
uint8_t ps2_host_recv(void);
void ps2_host_set_led(uint8_t usb_led);
/* TODO: device side */
/* device role */
#endif

28
ps2_vusb/config.h
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@ -23,14 +23,38 @@
# define MOUSEKEY_DELAY_TIME 255
#endif
/* PS/2 mouse */
/* PS/2 lines */
#define PS2_CLOCK_PORT PORTD
#define PS2_CLOCK_PIN PIND
#define PS2_CLOCK_DDR DDRD
#define PS2_CLOCK_BIT 6
#define PS2_CLOCK_BIT 3
#define PS2_DATA_PORT PORTD
#define PS2_DATA_PIN PIND
#define PS2_DATA_DDR DDRD
#define PS2_DATA_BIT 7
/* External interrupt for PS/2 clock line (optional) */
#define PS2_INT_ENABLE() do { \
EIMSK |= (1<<INT1); \
EICRA |= ((1<<ISC11) | (0<<ISC10)); \
EIFR |= (1<<INTF1); \
} while (0)
#define PS2_INT_DISABLE() do { \
EIMSK &= ~(1<<INT1); \
} while (0)
#define PS2_INT_VECT INT1_vect
/* Pin Change interrupt for PS/2 clock line (optional)
#define PS2_INT_ENABLE() do { \
PCMSK2 |= (1<<PCINT22); \
PCICR |= (1<<PCIE2); \
PCIFR |= (1<<PCIF2); \
} while (0)
#define PS2_INT_DISABLE() do { \
PCMSK2 &= ~(1<<PCINT22); \
PCICR &= ~(1<<PCIE); \
} while (0)
#define PS2_INT_VECT PCINT2_vect
*/
#endif

1
ps2_vusb/host.h
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@ -29,6 +29,7 @@ typedef struct {
} report_mouse_t;
extern uint8_t host_keyboard_led;
void host_keyboard_send(report_keyboard_t *report);
void host_mouse_send(report_mouse_t *report);

73
ps2_vusb/host_vusb.c
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@ -6,7 +6,7 @@
#include "host_vusb.h"
#define KBUF_SIZE 8
#define KBUF_SIZE 16
static report_keyboard_t kbuf[KBUF_SIZE];
static uint8_t kbuf_head = 0;
static uint8_t kbuf_tail = 0;
@ -14,12 +14,18 @@ static uint8_t kbuf_tail = 0;
void host_vusb_keyboard_send()
{
while (usbInterruptIsReady() && kbuf_head != kbuf_tail) {
usbSetInterrupt((void *)&kbuf[kbuf_tail], sizeof(report_keyboard_t));
kbuf_tail = (kbuf_tail + 1) % KBUF_SIZE;
}
/*
if (kbuf_head != kbuf_tail) {
if (usbInterruptIsReady()) {
usbSetInterrupt((void *)&kbuf[kbuf_tail], sizeof(report_keyboard_t));
kbuf_tail = (kbuf_tail + 1) % KBUF_SIZE;
}
}
*/
}
void host_keyboard_send(report_keyboard_t *report)
@ -28,14 +34,20 @@ void host_keyboard_send(report_keyboard_t *report)
if (next != kbuf_tail) {
kbuf[kbuf_head] = *report;
kbuf_head = next;
print("kbuf: "); phex(kbuf_head); phex(kbuf_tail); print("\n");
} else {
print("kbuf: full\n");
// hmm...
/*
matrix_init();
kbuf_head = 0;
kbuf_tail = 0;
*/
}
}
void host_mouse_send(report_mouse_t *report)
{
// dirty hack to send twice a loop :(
//while (!usbInterruptIsReady3()) usbPoll();
if (usbInterruptIsReady3()) {
usbSetInterrupt3((void *)report, sizeof(*report));
} else {
@ -46,30 +58,51 @@ void host_mouse_send(report_mouse_t *report)
static struct {
uint16_t len;
enum {
NONE,
SET_LED
} kind;
} last_req;
uint8_t host_keyboard_led = 0;
static uchar idleRate;
static uchar idleRate; /* repeat rate for keyboards, never used for mice */
usbMsgLen_t usbFunctionSetup(uchar data[8])
{
usbRequest_t *rq = (void *)data;
print("Setup: ");
//print("Setup: ");
if((rq->bmRequestType & USBRQ_TYPE_MASK) == USBRQ_TYPE_CLASS){ /* class request type */
/*
print("CLASS: ");
phex(rq->bRequest);
phex(rq->bRequest); print(" ");
phex16(rq->wValue.word); print(" ");
phex16(rq->wIndex.word); print(" ");
phex16(rq->wLength.word); print(" ");
*/
if(rq->bRequest == USBRQ_HID_GET_REPORT){
print("GET_REPORT");
print(" GET_REPORT");
/* we only have one report type, so don't look at wValue */
usbMsgPtr = (void *)keyboard_report;
return sizeof(*keyboard_report);
}else if(rq->bRequest == USBRQ_HID_GET_IDLE){
print("GET_IDLE: ");
print(" GET_IDLE: ");
phex(idleRate);
usbMsgPtr = &idleRate;
return 1;
}else if(rq->bRequest == USBRQ_HID_SET_IDLE){
idleRate = rq->wValue.bytes[1];
print("SET_IDLE: ");
print(" SET_IDLE: ");
phex(idleRate);
}else if(rq->bRequest == USBRQ_HID_SET_REPORT){
//print(" SET_REPORT: ");
if (rq->wValue.word == 0x0200 && rq->wIndex.word == 0) {
last_req.kind = SET_LED;
last_req.len = rq->wLength.word;
}
return USB_NO_MSG; // to get data in usbFunctionWrite
}
print("\n");
}else{
@ -79,6 +112,26 @@ usbRequest_t *rq = (void *)data;
return 0; /* default for not implemented requests: return no data back to host */
}
uchar usbFunctionWrite(uchar *data, uchar len)
{
if (last_req.len == 0) {
return -1;
}
switch (last_req.kind) {
case SET_LED:
//print("SET_LED\n");
host_keyboard_led = data[0];
last_req.len = 0;
return 1;
break;
case NONE:
default:
return -1;
break;
}
return 1;
}
PROGMEM uchar keyboard_hid_report[] = {
0x05, 0x01, // Usage Page (Generic Desktop),

1
ps2_vusb/host_vusb.h
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@ -4,4 +4,3 @@
void host_vusb_keyboard_send(void);
#endif

18
ps2_vusb/keyboard.c
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@ -1,12 +1,30 @@
#include "usb_keycodes.h"
#include "host.h"
#include "ps2.h"
#include "usb.h"
#include "keyboard.h"
#include "print.h"
static report_keyboard_t report0;
static report_keyboard_t report1;
static report_keyboard_t *report = &report0;
static report_keyboard_t *report_prev = &report1;
void keyboard_set_led(uint8_t usb_led)
{
uint8_t ps2_led = 0;
if (usb_led & (1<<USB_LED_SCROLL_LOCK))
ps2_led |= (1<<PS2_LED_SCROLL_LOCK);
if (usb_led & (1<<USB_LED_NUM_LOCK))
ps2_led |= (1<<PS2_LED_NUM_LOCK);
if (usb_led & (1<<USB_LED_CAPS_LOCK))
ps2_led |= (1<<PS2_LED_CAPS_LOCK);
print("ps2_led: "); phex(ps2_led); print("\n");
ps2_host_set_led(ps2_led);
}
void keyboard_send(void)
{
host_keyboard_send(report);

1
ps2_vusb/keyboard.h
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@ -6,6 +6,7 @@
#include "host.h"
void keyboard_set_led(uint8_t led);
void keyboard_send(void);
bool keyboard_has_key(void);
void keyboard_add_mod(uint8_t mod);

12
ps2_vusb/main.c
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@ -28,9 +28,13 @@
#include "host_vusb.h"
#include "timer.h"
#define DEBUGP_INIT() do { DDRC = 0xFF; } while (0)
#define DEBUGP(x) do { PORTC = x; } while (0)
static uint8_t last_led = 0;
int main(void)
{
DEBUGP_INIT();
wdt_enable(WDTO_1S);
/* Even if you don't use the watchdog, turn it off here. On newer devices,
* the status of the watchdog (on/off, period) is PRESERVED OVER RESET!
@ -60,10 +64,12 @@ int main(void)
uint8_t fn_bits = 0;
while (1) { /* main event loop */
DEBUGP(0x01);
wdt_reset();
usbPoll();
host_vusb_keyboard_send();
DEBUGP(0x02);
matrix_scan();
fn_bits = 0;
keyboard_swap_report();
@ -94,10 +100,16 @@ int main(void)
}
}
}
DEBUGP(0x03);
layer_switching(fn_bits);
if (matrix_is_modified()) {
keyboard_send();
}
mousekey_send();
if (last_led != host_keyboard_led) {
keyboard_set_led(host_keyboard_led);
last_led = host_keyboard_led;
}
}
}

54
ps2_vusb/matrix.c
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@ -60,8 +60,6 @@ static bool matrix_has_ghost_in_row(uint8_t row);
#endif
static void matrix_make(uint8_t code);
static void matrix_break(uint8_t code);
static void ps2_reset(void);
static void ps2_set_leds(uint8_t leds);
inline
@ -79,19 +77,7 @@ uint8_t matrix_cols(void)
void matrix_init(void)
{
ps2_host_init();
_delay_ms(1000);
// flush LEDs
/*
ps2_set_leds(1<<PS2_LED_NUM_LOCK);
_delay_ms(100);
ps2_set_leds(1<<PS2_LED_NUM_LOCK|1<<PS2_LED_CAPS_LOCK);
_delay_ms(100);
ps2_set_leds(1<<PS2_LED_NUM_LOCK|1<<PS2_LED_CAPS_LOCK|1<<PS2_LED_SCROLL_LOCK);
_delay_ms(300);
ps2_set_leds(0x00);
*/
// initialize matrix state: all keys off
for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;
@ -190,10 +176,7 @@ uint8_t matrix_scan(void)
}
uint8_t code;
code = ps2_host_recv();
if (code == 0x00) return 0;
//while ((code = ps2_host_recv())) {
//phex(code); print(" ");
while ((code = ps2_host_recv())) {
switch (state) {
case INIT:
switch (code) {
@ -350,26 +333,7 @@ uint8_t matrix_scan(void)
default:
state = INIT;
}
//}
//print("|");
// handle LED indicators
/*
static uint8_t prev_leds = 0;
if (prev_leds != usb_keyboard_leds) {
uint8_t leds = 0;
if (usb_keyboard_leds&(1<<USB_LED_SCROLL_LOCK))
leds |= (1<<PS2_LED_SCROLL_LOCK);
if (usb_keyboard_leds&(1<<USB_LED_NUM_LOCK))
leds |= (1<<PS2_LED_NUM_LOCK);
if (usb_keyboard_leds&(1<<USB_LED_CAPS_LOCK))
leds |= (1<<PS2_LED_CAPS_LOCK);
ps2_set_leds(leds);
prev_leds = usb_keyboard_leds;
}
*/
return 1;
}
@ -479,19 +443,3 @@ static void matrix_break(uint8_t code)
//print("matrix_break: "); phex(code); print("\n");
}
}
static void ps2_reset(void)
{
ps2_host_send(0xFF);
if (ps2_host_recv() != 0xFA) return;
_delay_ms(1000);
if (ps2_host_recv() != 0xAA) return;
}
static void ps2_set_leds(uint8_t leds)
{
ps2_host_send(0xED);
if (ps2_host_recv() != 0xFA) return; // 0xFA
ps2_host_send(leds);
if (ps2_host_recv() != 0xFA) return; // 0xFA
}

2
ps2_vusb/usbconfig.h
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@ -121,7 +121,7 @@ section at the end of this file).
* The value is in milliamperes. [It will be divided by two since USB
* communicates power requirements in units of 2 mA.]
*/
#define USB_CFG_IMPLEMENT_FN_WRITE 0
#define USB_CFG_IMPLEMENT_FN_WRITE 1
/* Set this to 1 if you want usbFunctionWrite() to be called for control-out
* transfers. Set it to 0 if you don't need it and want to save a couple of
* bytes.

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