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Port ps2_usb to mbed

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This commit is contained in:
tmk 2014-06-19 16:13:35 +09:00
parent 80c3ff5fa0
commit 4c8e0fd0bd
15 changed files with 343 additions and 90 deletions
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65
protocol/ps2.h
View file

@ -39,8 +39,9 @@ POSSIBILITY OF SUCH DAMAGE.
#define PS2_H
#include <stdbool.h>
#include <util/delay.h>
#include <avr/io.h>
#include "wait.h"
#include "ps2_io.h"
#include "print.h"
/*
* Primitive PS/2 Library for AVR
@ -92,79 +93,27 @@ uint8_t ps2_host_recv(void);
void ps2_host_set_led(uint8_t usb_led);
/* Check port settings for clock and data line */
#if !(defined(PS2_CLOCK_PORT) && \
defined(PS2_CLOCK_PIN) && \
defined(PS2_CLOCK_DDR) && \
defined(PS2_CLOCK_BIT))
# error "PS/2 clock port setting is required in config.h"
#endif
#if !(defined(PS2_DATA_PORT) && \
defined(PS2_DATA_PIN) && \
defined(PS2_DATA_DDR) && \
defined(PS2_DATA_BIT))
# error "PS/2 data port setting is required in config.h"
#endif
/*--------------------------------------------------------------------
* static functions
*------------------------------------------------------------------*/
static inline void clock_lo(void)
{
PS2_CLOCK_PORT &= ~(1<<PS2_CLOCK_BIT);
PS2_CLOCK_DDR |= (1<<PS2_CLOCK_BIT);
}
static inline void clock_hi(void)
{
/* input with pull up */
PS2_CLOCK_DDR &= ~(1<<PS2_CLOCK_BIT);
PS2_CLOCK_PORT |= (1<<PS2_CLOCK_BIT);
}
static inline bool clock_in(void)
{
PS2_CLOCK_DDR &= ~(1<<PS2_CLOCK_BIT);
PS2_CLOCK_PORT |= (1<<PS2_CLOCK_BIT);
_delay_us(1);
return PS2_CLOCK_PIN&(1<<PS2_CLOCK_BIT);
}
static inline void data_lo(void)
{
PS2_DATA_PORT &= ~(1<<PS2_DATA_BIT);
PS2_DATA_DDR |= (1<<PS2_DATA_BIT);
}
static inline void data_hi(void)
{
/* input with pull up */
PS2_DATA_DDR &= ~(1<<PS2_DATA_BIT);
PS2_DATA_PORT |= (1<<PS2_DATA_BIT);
}
static inline bool data_in(void)
{
PS2_DATA_DDR &= ~(1<<PS2_DATA_BIT);
PS2_DATA_PORT |= (1<<PS2_DATA_BIT);
_delay_us(1);
return PS2_DATA_PIN&(1<<PS2_DATA_BIT);
}
static inline uint16_t wait_clock_lo(uint16_t us)
{
while (clock_in() && us) { asm(""); _delay_us(1); us--; }
while (clock_in() && us) { asm(""); wait_us(1); us--; }
return us;
}
static inline uint16_t wait_clock_hi(uint16_t us)
{
while (!clock_in() && us) { asm(""); _delay_us(1); us--; }
while (!clock_in() && us) { asm(""); wait_us(1); us--; }
return us;
}
static inline uint16_t wait_data_lo(uint16_t us)
{
while (data_in() && us) { asm(""); _delay_us(1); us--; }
while (data_in() && us) { asm(""); wait_us(1); us--; }
return us;
}
static inline uint16_t wait_data_hi(uint16_t us)
{
while (!data_in() && us) { asm(""); _delay_us(1); us--; }
while (!data_in() && us) { asm(""); wait_us(1); us--; }
return us;
}

16
protocol/ps2_busywait.c
View file

@ -40,8 +40,9 @@ POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdbool.h>
#include <util/delay.h>
#include "wait.h"
#include "ps2.h"
#include "ps2_io.h"
#include "debug.h"
@ -58,8 +59,11 @@ uint8_t ps2_error = PS2_ERR_NONE;
void ps2_host_init(void)
{
clock_init();
data_init();
// POR(150-2000ms) plus BAT(300-500ms) may take 2.5sec([3]p.20)
_delay_ms(2500);
wait_ms(2500);
inhibit();
}
@ -71,7 +75,7 @@ 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();
@ -80,7 +84,7 @@ uint8_t ps2_host_send(uint8_t data)
/* Data bit */
for (uint8_t i = 0; i < 8; i++) {
_delay_us(15);
wait_us(15);
if (data&(1<<i)) {
parity = !parity;
data_hi();
@ -92,13 +96,13 @@ uint8_t ps2_host_send(uint8_t data)
}
/* Parity bit */
_delay_us(15);
wait_us(15);
if (parity) { data_hi(); } else { data_lo(); }
WAIT(clock_hi, 50, 4);
WAIT(clock_lo, 50, 5);
/* Stop bit */
_delay_us(15);
wait_us(15);
data_hi();
/* Ack */

15
protocol/ps2_io.h Normal file
View file

@ -0,0 +1,15 @@
#ifndef PS2_IO_H
#define PS2_IO_H
void clock_init(void);
void clock_lo(void);
void clock_hi(void);
bool clock_in(void);
void data_init(void);
void data_lo(void);
void data_hi(void);
bool data_in(void);
#endif

74
protocol/ps2_io_avr.c Normal file
View file

@ -0,0 +1,74 @@
#include <stdbool.h>
#include <util/delay.h>
/* Check port settings for clock and data line */
#if !(defined(PS2_CLOCK_PORT) && \
defined(PS2_CLOCK_PIN) && \
defined(PS2_CLOCK_DDR) && \
defined(PS2_CLOCK_BIT))
# error "PS/2 clock port setting is required in config.h"
#endif
#if !(defined(PS2_DATA_PORT) && \
defined(PS2_DATA_PIN) && \
defined(PS2_DATA_DDR) && \
defined(PS2_DATA_BIT))
# error "PS/2 data port setting is required in config.h"
#endif
/*
* Clock
*/
void clock_init(void)
{
}
void clock_lo(void)
{
PS2_CLOCK_PORT &= ~(1<<PS2_CLOCK_BIT);
PS2_CLOCK_DDR |= (1<<PS2_CLOCK_BIT);
}
void clock_hi(void)
{
/* input with pull up */
PS2_CLOCK_DDR &= ~(1<<PS2_CLOCK_BIT);
PS2_CLOCK_PORT |= (1<<PS2_CLOCK_BIT);
}
bool clock_in(void)
{
PS2_CLOCK_DDR &= ~(1<<PS2_CLOCK_BIT);
PS2_CLOCK_PORT |= (1<<PS2_CLOCK_BIT);
_delay_us(1);
return PS2_CLOCK_PIN&(1<<PS2_CLOCK_BIT);
}
/*
* Data
*/
void data_init(void)
{
}
void data_lo(void)
{
PS2_DATA_PORT &= ~(1<<PS2_DATA_BIT);
PS2_DATA_DDR |= (1<<PS2_DATA_BIT);
}
void data_hi(void)
{
/* input with pull up */
PS2_DATA_DDR &= ~(1<<PS2_DATA_BIT);
PS2_DATA_PORT |= (1<<PS2_DATA_BIT);
}
bool data_in(void)
{
PS2_DATA_DDR &= ~(1<<PS2_DATA_BIT);
PS2_DATA_PORT |= (1<<PS2_DATA_BIT);
_delay_us(1);
return PS2_DATA_PIN&(1<<PS2_DATA_BIT);
}

60
protocol/ps2_io_mbed.c Normal file
View file

@ -0,0 +1,60 @@
#include <stdbool.h>
#include "ps2_io.h"
#include "gpio_api.h"
static gpio_t clock;
static gpio_t data;
/*
* Clock
*/
void clock_init(void)
{
gpio_init(&clock, P0_9);
gpio_mode(&clock, OpenDrain|PullNone);
}
void clock_lo(void)
{
gpio_dir(&clock, PIN_OUTPUT);
gpio_write(&clock, 0);
}
void clock_hi(void)
{
gpio_dir(&clock, PIN_OUTPUT);
gpio_write(&clock, 1);
}
bool clock_in(void)
{
gpio_dir(&clock, PIN_INPUT);
return gpio_read(&clock);
}
/*
* Data
*/
void data_init(void)
{
gpio_init(&data, P0_8);
gpio_mode(&data, OpenDrain|PullNone);
}
void data_lo(void)
{
gpio_dir(&data, PIN_OUTPUT);
gpio_write(&data, 0);
}
void data_hi(void)
{
gpio_dir(&data, PIN_OUTPUT);
gpio_write(&data, 1);
}
bool data_in(void)
{
gpio_dir(&data, PIN_INPUT);
return gpio_read(&data);
}