Low-level module consists of callback-only functions, which are called by middleware and must be implemented by final application.
Check Porting guide for actual implementation
- group LWGSM_LL
Low-level communication functions.
typedef size_t (*lwgsm_ll_send_fn)(const void *data, size_t len)¶
Function prototype for AT output data.
data – [in] Pointer to data to send. This parameter can be set to
len – [in] Number of bytes to send. This parameter can be set to
0to indicate that internal buffer can be flushed to stream. This is implementation defined and feature might be ignored
Number of bytes sent
typedef uint8_t (*lwgsm_ll_reset_fn)(uint8_t state)¶
Function prototype for hardware reset of GSM device.
state – [in] State indicating reset. When set to
1, reset must be active (usually pin active low), or set to
0when reset is cleared
1on successful action,
lwgsmr_t lwgsm_ll_init(lwgsm_ll_t *ll)¶
Callback function called from initialization process.
This function may be called multiple times if AT baudrate is changed from application. It is important that every configuration except AT baudrate is configured only once!
This function may be called from different threads in GSM stack when using OS. When LWGSM_CFG_INPUT_USE_PROCESS is set to 1, this function may be called from user UART thread.
- #include <lwgsm_typedefs.h>
Low level user specific functions.
- typedef size_t (*lwgsm_ll_send_fn)(const void *data, size_t len)¶