diff options
| author | tmk <hasu@tmk-kbd.com> | 2015-04-28 11:27:10 +0900 |
|---|---|---|
| committer | tmk <hasu@tmk-kbd.com> | 2015-04-28 11:27:10 +0900 |
| commit | 4d116a04e94cf0d19317d5b44e4fa9f34a3e5594 (patch) | |
| tree | 3a2c044bec35111604aedfd024ab2689b3f40c7c /ring_buffer.h | |
| parent | 1fe4406f374291ab2e86e95a97341fd9c475fcb8 (diff) | |
Squashed 'tmk_core/' changes from b9e0ea0..caca2c0
caca2c0 Add mouse support to ADB
5b0835a Merge commit '1fe4406f374291ab2e86e95a97341fd9c475fcb8'
f2f7556 Remove unneeded tap delays #201
8124195 Fix URL of HID Usage Tables pdf
0bb4679 Fix typo of doc/keycode.txt
b24fa1a Fix handling of consumer usage #199
6ae1a3d Improve anti-ghosting behavior for fast typing
a4c9763 Fix dfu-programmer parameters
b62b3f2 Move ring_buffer.h file
6ec424f Fix debug print
502fb0c Fix ibm4704 protocol with using interrupt
git-subtree-dir: tmk_core
git-subtree-split: caca2c01553394d959550034c817520d575c7fa0
Diffstat (limited to 'ring_buffer.h')
| -rw-r--r-- | ring_buffer.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/ring_buffer.h b/ring_buffer.h new file mode 100644 index 0000000000..7bdebbcf34 --- /dev/null +++ b/ring_buffer.h @@ -0,0 +1,53 @@ +#ifndef RING_BUFFER_H +#define RING_BUFFER_H +/*-------------------------------------------------------------------- + * Ring buffer to store scan codes from keyboard + *------------------------------------------------------------------*/ +#define RBUF_SIZE 32 +static uint8_t rbuf[RBUF_SIZE]; +static uint8_t rbuf_head = 0; +static uint8_t rbuf_tail = 0; +static inline void rbuf_enqueue(uint8_t data) +{ + uint8_t sreg = SREG; + cli(); + uint8_t next = (rbuf_head + 1) % RBUF_SIZE; + if (next != rbuf_tail) { + rbuf[rbuf_head] = data; + rbuf_head = next; + } else { + print("rbuf: full\n"); + } + SREG = sreg; +} +static inline uint8_t rbuf_dequeue(void) +{ + uint8_t val = 0; + + uint8_t sreg = SREG; + cli(); + if (rbuf_head != rbuf_tail) { + val = rbuf[rbuf_tail]; + rbuf_tail = (rbuf_tail + 1) % RBUF_SIZE; + } + SREG = sreg; + + return val; +} +static inline bool rbuf_has_data(void) +{ + uint8_t sreg = SREG; + cli(); + bool has_data = (rbuf_head != rbuf_tail); + SREG = sreg; + return has_data; +} +static inline void rbuf_clear(void) +{ + uint8_t sreg = SREG; + cli(); + rbuf_head = rbuf_tail = 0; + SREG = sreg; +} + +#endif /* RING_BUFFER_H */ |