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Fix PS/2 USART version

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This commit is contained in:
tmk 2013-11-21 12:15:33 +09:00
parent 416a5b849e
commit ccbc1dd8e7
1 changed files with 25 additions and 29 deletions
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54
protocol/ps2_usart.c
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@ -1,5 +1,5 @@
/*
Copyright 2010,2011 Jun WAKO <wakojun@gmail.com>
Copyright 2010,2011,2012,2013 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,
@ -64,14 +64,6 @@ http://www.mcamafia.de/pdf/ibm_hitrc07.pdf
#include "debug.h"
#if 0
#define DEBUGP_INIT() do { DDRC = 0xFF; } while (0)
#define DEBUGP(x) do { PORTC = x; } while (0)
#else
#define DEBUGP_INIT()
#define DEBUGP(x)
#endif
#define WAIT(stat, us, err) do { \
if (!wait_##stat(us)) { \
ps2_error = err; \
@ -97,12 +89,12 @@ static inline void idle(void);
static inline void inhibit(void);
static inline uint8_t pbuf_dequeue(void);
static inline void pbuf_enqueue(uint8_t data);
static inline bool pbuf_has_data(void);
static inline void pbuf_clear(void);
void ps2_host_init(void)
{
DEBUGP_INIT();
DEBUGP(0x1);
idle();
PS2_USART_INIT();
PS2_USART_RX_INT_ON();
@ -114,7 +106,6 @@ uint8_t ps2_host_send(uint8_t data)
bool parity = true;
ps2_error = PS2_ERR_NONE;
DEBUGP(0x6);
PS2_USART_OFF();
/* terminate a transmission if we have */
@ -153,6 +144,8 @@ uint8_t ps2_host_send(uint8_t data)
WAIT(clock_hi, 50, 8);
WAIT(data_hi, 50, 9);
PS2_USART_INIT();
PS2_USART_RX_INT_ON();
res = ps2_host_recv_response();
ERROR:
idle();
@ -164,15 +157,10 @@ ERROR:
// Do polling data from keyboard to get response to last command.
uint8_t ps2_host_recv_response(void)
{
uint8_t data = 0;
PS2_USART_INIT();
PS2_USART_RX_POLL_ON();
while (!PS2_USART_RX_READY)
;
data = PS2_USART_RX_DATA;
PS2_USART_OFF();
DEBUGP(0x9);
return data;
while (!pbuf_has_data()) {
_delay_ms(1); // without this delay it seems to fall into deadlock
}
return pbuf_dequeue();
}
uint8_t ps2_host_recv(void)
@ -182,15 +170,11 @@ uint8_t ps2_host_recv(void)
ISR(PS2_USART_RX_VECT)
{
DEBUGP(0x7);
uint8_t error = PS2_USART_ERROR;
uint8_t data = PS2_USART_RX_DATA;
if (error) {
DEBUGP(error>>2);
} else {
if (!error) {
pbuf_enqueue(data);
}
DEBUGP(0x8);
}
/* send LED state to keyboard */
@ -293,9 +277,6 @@ 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 sreg = SREG;
cli();
uint8_t next = (pbuf_head + 1) % PBUF_SIZE;
@ -322,3 +303,18 @@ static inline uint8_t pbuf_dequeue(void)
return val;
}
static inline bool pbuf_has_data(void)
{
uint8_t sreg = SREG;
cli();
bool has_data = (pbuf_head != pbuf_tail);
SREG = sreg;
return has_data;
}
static inline void pbuf_clear(void)
{
uint8_t sreg = SREG;
cli();
pbuf_head = pbuf_tail = 0;
SREG = sreg;
}