diff options
Diffstat (limited to 'protocol/ps2.c')
| -rw-r--r-- | protocol/ps2.c | 53 |
1 files changed, 35 insertions, 18 deletions
diff --git a/protocol/ps2.c b/protocol/ps2.c index 4c6c2fcb27..e5873a9bfa 100644 --- a/protocol/ps2.c +++ b/protocol/ps2.c @@ -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, @@ -43,7 +43,9 @@ POSSIBILITY OF SUCH DAMAGE. #include "debug.h" +#ifndef PS2_USE_INT static uint8_t recv_data(void); +#endif static inline void clock_lo(void); static inline void clock_hi(void); static inline bool clock_in(void); @@ -143,6 +145,9 @@ uint8_t ps2_host_send(uint8_t data) WAIT(clock_hi, 50, 8); WAIT(data_hi, 50, 9); +#ifdef PS2_USE_INT + PS2_INT_ON(); +#endif res = ps2_host_recv_response(); ERROR: #ifdef PS2_USE_INT @@ -154,11 +159,15 @@ ERROR: return res; } +#ifndef PS2_USE_INT /* receive data when host want else inhibit communication */ uint8_t ps2_host_recv_response(void) { uint8_t data = 0; +#ifdef PS2_USE_INT + PS2_INT_OFF(); +#endif /* terminate a transmission if we have */ inhibit(); _delay_us(100); @@ -173,6 +182,7 @@ uint8_t ps2_host_recv_response(void) inhibit(); return data; } +#endif #ifndef PS2_USE_INT uint8_t ps2_host_recv(void) @@ -187,9 +197,6 @@ 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; @@ -215,6 +222,21 @@ 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; +} /* get data received by interrupt */ uint8_t ps2_host_recv(void) @@ -229,13 +251,12 @@ uint8_t ps2_host_recv(void) return pbuf_dequeue(); } -#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 +uint8_t ps2_host_recv_response(void) +{ + while (!pbuf_has_data()) ; + return pbuf_dequeue(); +} + ISR(PS2_INT_VECT) { static enum { @@ -256,7 +277,6 @@ ISR(PS2_INT_VECT) } state++; - DEBUGP(state); switch (state) { case START: if (data_in()) @@ -289,6 +309,7 @@ ISR(PS2_INT_VECT) if (!data_in()) goto ERROR; pbuf_enqueue(data); +//phex(data); goto DONE; break; default: @@ -296,7 +317,6 @@ ISR(PS2_INT_VECT) } goto RETURN; ERROR: - DEBUGP(0x0F); inhibit(); ps2_error = state; DONE: @@ -309,11 +329,6 @@ RETURN: #endif -static void ps2_reset(void) -{ - ps2_host_send(0xFF); -} - /* send LED state to keyboard */ void ps2_host_set_led(uint8_t led) { @@ -322,6 +337,7 @@ void ps2_host_set_led(uint8_t led) } +#ifndef PS2_USE_INT /* called after start bit comes */ static uint8_t recv_data(void) { @@ -361,6 +377,7 @@ static uint8_t recv_data(void) ERROR: return 0; } +#endif static inline void clock_lo() { |