| 29,11 → 29,13 |
|---|
| #include <key_buffer.h> |
| #include <fifo.h> |
| |
| #define KBD_BUFFER_SIZE 128 |
| #define KBD_BUFFER_SIZE 128 /**< Size of buffer for pressed keys */ |
| |
| FIFO_INITIALIZE_STATIC(buffer, char, KBD_BUFFER_SIZE); |
| fifo_count_t buffer_items; |
| FIFO_INITIALIZE_STATIC(buffer, char, KBD_BUFFER_SIZE); /**< Fifo for storing pressed keys */ |
| fifo_count_t buffer_items; /**< Counter of used items for prevent fifo overflow */ |
| |
| /** Clear key buffer. |
| */ |
| void key_buffer_free(void) |
| { |
| buffer_items = 0; |
| 40,12 → 42,17 |
|---|
| buffer.head = buffer.tail = 0; |
| } |
| |
| /** Key buffer initialization. |
| * |
| */ |
| void key_buffer_init(void) |
| { |
| key_buffer_free(); |
| } |
| |
| /** |
| /** Get free space in buffer. |
| * This function is useful for processing some scancodes that are translated |
| * to more than one character. |
| * @return empty buffer space |
| */ |
| int key_buffer_available(void) |
| 53,9 → 60,20 |
|---|
| return KBD_BUFFER_SIZE - buffer_items; |
| } |
| |
| /** |
| * @return nonzero, if buffer is not empty. |
| */ |
| int key_buffer_empty(void) |
| { |
| return (buffer_items == 0); |
| } |
| |
| /** Push key to key buffer. |
| * If buffer is full, character is ignored. |
| * @param key code of stored key |
| */ |
| void key_buffer_push(char key) |
| { |
| /* TODO: somebody may wait for key */ |
| if (buffer_items < KBD_BUFFER_SIZE) { |
| fifo_push(buffer, key); |
| buffer_items++; |
| 63,7 → 81,7 |
|---|
| } |
| |
| /** Pop character from buffer. |
| * @param c |
| * @param c pointer to space where to store character from buffer. |
| * @return zero on empty buffer, nonzero else |
| */ |
| int key_buffer_pop(char *c) |