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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
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@ -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;
}