diff options
Diffstat (limited to 'nuttx/include/nuttx/sercomm/sercomm.h')
-rw-r--r-- | nuttx/include/nuttx/sercomm/sercomm.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/nuttx/include/nuttx/sercomm/sercomm.h b/nuttx/include/nuttx/sercomm/sercomm.h new file mode 100644 index 000000000..54256b5a7 --- /dev/null +++ b/nuttx/include/nuttx/sercomm/sercomm.h @@ -0,0 +1,57 @@ +#ifndef _SERCOMM_H +#define _SERCOMM_H + +/* SERCOMM layer on UART1 (modem UART) */ + +#include <osmocom/core/msgb.h> + +#define SERCOMM_UART_NR 1 + +#define HDLC_FLAG 0x7E +#define HDLC_ESCAPE 0x7D + +#define HDLC_C_UI 0x03 +#define HDLC_C_P_BIT (1 << 4) +#define HDLC_C_F_BIT (1 << 4) + +/* a low sercomm_dlci means high priority. A high DLCI means low priority */ +enum sercomm_dlci { + SC_DLCI_HIGHEST = 0, + SC_DLCI_DEBUG = 4, + SC_DLCI_L1A_L23 = 5, + SC_DLCI_LOADER = 9, + SC_DLCI_CONSOLE = 10, + SC_DLCI_ECHO = 128, + _SC_DLCI_MAX +}; + +void sercomm_init(void); +int sercomm_initialized(void); + +/* User Interface: Tx */ + +/* user interface for transmitting messages for a given DLCI */ +void sercomm_sendmsg(uint8_t dlci, struct msgb *msg); +/* how deep is the Tx queue for a given DLCI */ +unsigned int sercomm_tx_queue_depth(uint8_t dlci); + +/* User Interface: Rx */ + +/* receiving messages for a given DLCI */ +typedef void (*dlci_cb_t)(uint8_t dlci, struct msgb *msg); +int sercomm_register_rx_cb(uint8_t dlci, dlci_cb_t cb); + +/* Driver Interface */ + +/* fetch one octet of to-be-transmitted serial data. returns 0 if no more data */ +int sercomm_drv_pull(uint8_t *ch); +/* the driver has received one byte, pass it into sercomm layer. + returns 1 in case of success, 0 in case of unrecognized char */ +int sercomm_drv_rx_char(uint8_t ch); + +static inline struct msgb *sercomm_alloc_msgb(unsigned int len) +{ + return msgb_alloc_headroom(len+4, 4, "sercomm_tx"); +} + +#endif /* _SERCOMM_H */ |