diff options
Diffstat (limited to 'ao.h')
| -rw-r--r-- | ao.h | 64 |
1 files changed, 64 insertions, 0 deletions
@@ -859,4 +859,68 @@ extern const char ao_version[]; extern const char ao_manufacturer[]; extern const char ao_product[]; +/* + * Fifos + */ + +#define AO_FIFO_SIZE 32 + +struct ao_fifo { + uint8_t insert; + uint8_t remove; + char fifo[AO_FIFO_SIZE]; +}; + +#define ao_fifo_insert(f,c) do { \ + (f).fifo[(f).insert] = (c); \ + (f).insert = ((f).insert + 1) & (AO_FIFO_SIZE-1); \ +} while(0) + +#define ao_fifo_remove(f,c) do {\ + c = (f).fifo[(f).remove]; \ + (f).remove = ((f).remove + 1) & (AO_FIFO_SIZE-1); \ +} while(0) + +#define ao_fifo_full(f) ((((f).insert + 1) & (AO_FIFO_SIZE-1)) == (f).remove) +#define ao_fifo_empty(f) ((f).insert == (f).remove) + +/* + * ao_packet.c + * + * Packet-based command interface + */ + +#define AO_PACKET_MAX 32 +#define AO_PACKET_WIN 256 + +#define AO_PACKET_FIN (1 << 0) +#define AO_PACKET_SYN (1 << 1) +#define AO_PACKET_RST (1 << 2) +#define AO_PACKET_ACK (1 << 3) + +struct ao_packet { + uint8_t addr; + uint8_t flags; + uint16_t seq; + uint16_t ack; + uint16_t window; + uint8_t len; + uint8_t d[AO_PACKET_MAX]; +}; + +uint8_t +ao_packet_connect(uint8_t dest); + +uint8_t +ao_packet_accept(void); + +int +ao_packet_send(uint8_t *data, int len); + +int +ao_packet_recv(uint8_t *data, int len); + +void +ao_packet_init(void); + #endif /* _AO_H_ */ |