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@@ -1,5 +1,5 @@ |
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/* |
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Copyright 2010,2011 Jun WAKO <[email protected]> |
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Copyright 2010,2011,2012,2013 Jun WAKO <[email protected]> |
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This software is licensed with a Modified BSD License. |
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All of this is supposed to be Free Software, Open Source, DFSG-free, |
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@@ -43,7 +43,9 @@ POSSIBILITY OF SUCH DAMAGE. |
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#include "debug.h" |
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#ifndef PS2_USE_INT |
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static uint8_t recv_data(void); |
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#endif |
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static inline void clock_lo(void); |
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static inline void clock_hi(void); |
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static inline bool clock_in(void); |
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@@ -143,6 +145,9 @@ uint8_t ps2_host_send(uint8_t data) |
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WAIT(clock_hi, 50, 8); |
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WAIT(data_hi, 50, 9); |
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#ifdef PS2_USE_INT |
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PS2_INT_ON(); |
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#endif |
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res = ps2_host_recv_response(); |
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ERROR: |
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#ifdef PS2_USE_INT |
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@@ -154,11 +159,15 @@ ERROR: |
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return res; |
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} |
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#ifndef PS2_USE_INT |
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/* receive data when host want else inhibit communication */ |
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uint8_t ps2_host_recv_response(void) |
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{ |
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uint8_t data = 0; |
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#ifdef PS2_USE_INT |
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PS2_INT_OFF(); |
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#endif |
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/* terminate a transmission if we have */ |
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inhibit(); |
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_delay_us(100); |
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@@ -173,6 +182,7 @@ uint8_t ps2_host_recv_response(void) |
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inhibit(); |
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return data; |
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} |
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#endif |
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#ifndef PS2_USE_INT |
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uint8_t ps2_host_recv(void) |
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@@ -187,9 +197,6 @@ static uint8_t pbuf_head = 0; |
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static uint8_t pbuf_tail = 0; |
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static inline void pbuf_enqueue(uint8_t data) |
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{ |
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if (!data) |
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return; |
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uint8_t sreg = SREG; |
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cli(); |
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uint8_t next = (pbuf_head + 1) % PBUF_SIZE; |
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@@ -215,6 +222,21 @@ static inline uint8_t pbuf_dequeue(void) |
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return val; |
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} |
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static inline bool pbuf_has_data(void) |
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{ |
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uint8_t sreg = SREG; |
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cli(); |
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bool has_data = (pbuf_head != pbuf_tail); |
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SREG = sreg; |
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return has_data; |
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} |
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static inline void pbuf_clear(void) |
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{ |
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uint8_t sreg = SREG; |
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cli(); |
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pbuf_head = pbuf_tail = 0; |
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SREG = sreg; |
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} |
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/* get data received by interrupt */ |
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uint8_t ps2_host_recv(void) |
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@@ -229,13 +251,12 @@ uint8_t ps2_host_recv(void) |
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return pbuf_dequeue(); |
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} |
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#if 0 |
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#define DEBUGP_INIT() do { DDRC = 0xFF; } while (0) |
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#define DEBUGP(x) do { PORTC = x; } while (0) |
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#else |
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#define DEBUGP_INIT() |
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#define DEBUGP(x) |
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#endif |
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uint8_t ps2_host_recv_response(void) |
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{ |
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while (!pbuf_has_data()) ; |
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return pbuf_dequeue(); |
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} |
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ISR(PS2_INT_VECT) |
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{ |
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static enum { |
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@@ -256,7 +277,6 @@ ISR(PS2_INT_VECT) |
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} |
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state++; |
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DEBUGP(state); |
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switch (state) { |
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case START: |
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if (data_in()) |
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@@ -289,6 +309,7 @@ ISR(PS2_INT_VECT) |
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if (!data_in()) |
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goto ERROR; |
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pbuf_enqueue(data); |
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//phex(data); |
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goto DONE; |
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break; |
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default: |
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@@ -296,7 +317,6 @@ ISR(PS2_INT_VECT) |
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} |
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goto RETURN; |
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ERROR: |
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DEBUGP(0x0F); |
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inhibit(); |
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ps2_error = state; |
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DONE: |
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@@ -309,11 +329,6 @@ RETURN: |
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#endif |
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static void ps2_reset(void) |
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{ |
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ps2_host_send(0xFF); |
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} |
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/* send LED state to keyboard */ |
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void ps2_host_set_led(uint8_t led) |
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{ |
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@@ -322,6 +337,7 @@ void ps2_host_set_led(uint8_t led) |
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} |
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#ifndef PS2_USE_INT |
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/* called after start bit comes */ |
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static uint8_t recv_data(void) |
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{ |
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@@ -361,6 +377,7 @@ static uint8_t recv_data(void) |
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ERROR: |
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return 0; |
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} |
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#endif |
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static inline void clock_lo() |
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{ |
tmk
преди 10 години