Modem Ubx

Modem Ubx. More...

Data Structures
struct	ubx_frame
struct	modem_ubx_script
struct	modem_ubx
struct	modem_ubx_config

Macros
#define	UBX_FRM_HEADER_SZ   6
#define	UBX_FRM_FOOTER_SZ   2
#define	UBX_FRM_SZ_WITHOUT_PAYLOAD   (UBX_FRM_HEADER_SZ + UBX_FRM_FOOTER_SZ)
#define	UBX_FRM_SZ(payload_size)   (payload_size + UBX_FRM_SZ_WITHOUT_PAYLOAD)
#define	UBX_PREAMBLE_SYNC_CHAR_1   0xB5
#define	UBX_PREAMBLE_SYNC_CHAR_2   0x62
#define	UBX_FRM_PREAMBLE_SYNC_CHAR_1_IDX   0
#define	UBX_FRM_PREAMBLE_SYNC_CHAR_2_IDX   1
#define	UBX_FRM_MSG_CLASS_IDX   2
#define	UBX_FRM_MSG_ID_IDX   3
#define	UBX_FRM_PAYLOAD_SZ_L_IDX   4
#define	UBX_FRM_PAYLOAD_SZ_H_IDX   5
#define	UBX_FRM_PAYLOAD_IDX   6
#define	UBX_FRM_CHECKSUM_START_IDX   2
#define	UBX_FRM_CHECKSUM_STOP_IDX(frame_len)   (frame_len - 2)
#define	UBX_PAYLOAD_SZ_MAX   256
#define	UBX_FRM_SZ_MAX   UBX_FRM_SZ(UBX_PAYLOAD_SZ_MAX)

Functions
int	modem_ubx_attach (struct modem_ubx *ubx, struct modem_pipe *pipe)
	Attach pipe to Modem Ubx.
void	modem_ubx_release (struct modem_ubx *ubx)
	Release pipe from Modem Ubx instance.
int	modem_ubx_init (struct modem_ubx *ubx, const struct modem_ubx_config *config)
	Initialize Modem Ubx instance.
int	modem_ubx_run_script (struct modem_ubx *ubx, const struct modem_ubx_script *script)
	Writes the ubx frame in script.request and reads back its response (if available)
int	modem_ubx_create_frame (uint8_t *ubx_frame, uint16_t ubx_frame_size, uint8_t msg_cls, uint8_t msg_id, const void *payload, uint16_t payload_size)
	Initialize ubx frame.

Detailed Description

Modem Ubx.

Macro Definition Documentation

UBX_FRM_CHECKSUM_START_IDX

#define UBX_FRM_CHECKSUM_START_IDX   2

#include <include/zephyr/modem/ubx.h>

UBX_FRM_CHECKSUM_STOP_IDX

#define UBX_FRM_CHECKSUM_STOP_IDX

(

frame_len

)

(frame_len - 2)

#include <include/zephyr/modem/ubx.h>

UBX_FRM_FOOTER_SZ

#define UBX_FRM_FOOTER_SZ   2

#include <include/zephyr/modem/ubx.h>

UBX_FRM_HEADER_SZ

#define UBX_FRM_HEADER_SZ   6

#include <include/zephyr/modem/ubx.h>

UBX_FRM_MSG_CLASS_IDX

#define UBX_FRM_MSG_CLASS_IDX   2

#include <include/zephyr/modem/ubx.h>

UBX_FRM_MSG_ID_IDX

#define UBX_FRM_MSG_ID_IDX   3

#include <include/zephyr/modem/ubx.h>

UBX_FRM_PAYLOAD_IDX

#define UBX_FRM_PAYLOAD_IDX   6

#include <include/zephyr/modem/ubx.h>

UBX_FRM_PAYLOAD_SZ_H_IDX

#define UBX_FRM_PAYLOAD_SZ_H_IDX   5

#include <include/zephyr/modem/ubx.h>

UBX_FRM_PAYLOAD_SZ_L_IDX

#define UBX_FRM_PAYLOAD_SZ_L_IDX   4

#include <include/zephyr/modem/ubx.h>

UBX_FRM_PREAMBLE_SYNC_CHAR_1_IDX

#define UBX_FRM_PREAMBLE_SYNC_CHAR_1_IDX   0

#include <include/zephyr/modem/ubx.h>

UBX_FRM_PREAMBLE_SYNC_CHAR_2_IDX

#define UBX_FRM_PREAMBLE_SYNC_CHAR_2_IDX   1

#include <include/zephyr/modem/ubx.h>

UBX_FRM_SZ

#define UBX_FRM_SZ

(

payload_size

)

(payload_size + UBX_FRM_SZ_WITHOUT_PAYLOAD)

#include <include/zephyr/modem/ubx.h>

UBX_FRM_SZ_MAX

#define UBX_FRM_SZ_MAX   UBX_FRM_SZ(UBX_PAYLOAD_SZ_MAX)

#include <include/zephyr/modem/ubx.h>

UBX_FRM_SZ_WITHOUT_PAYLOAD

#define UBX_FRM_SZ_WITHOUT_PAYLOAD   (UBX_FRM_HEADER_SZ + UBX_FRM_FOOTER_SZ)

#include <include/zephyr/modem/ubx.h>

UBX_PAYLOAD_SZ_MAX

#define UBX_PAYLOAD_SZ_MAX   256

#include <include/zephyr/modem/ubx.h>

UBX_PREAMBLE_SYNC_CHAR_1

#define UBX_PREAMBLE_SYNC_CHAR_1   0xB5

#include <include/zephyr/modem/ubx.h>

UBX_PREAMBLE_SYNC_CHAR_2

#define UBX_PREAMBLE_SYNC_CHAR_2   0x62

#include <include/zephyr/modem/ubx.h>

Function Documentation

modem_ubx_attach()

int modem_ubx_attach	(	struct modem_ubx *	ubx,
		struct modem_pipe *	pipe
	)

#include <include/zephyr/modem/ubx.h>

Attach pipe to Modem Ubx.

Parameters

ubx	Modem Ubx instance
pipe	Pipe instance to attach Modem Ubx instance to

Returns

0 if successful

negative errno code if failure

Note

Modem Ubx instance is enabled if successful

modem_ubx_create_frame()

int modem_ubx_create_frame	(	uint8_t *	ubx_frame,
		uint16_t	ubx_frame_size,
		uint8_t	msg_cls,
		uint8_t	msg_id,
		const void *	payload,
		uint16_t	payload_size
	)

#include <include/zephyr/modem/ubx.h>

Initialize ubx frame.

Parameters

ubx_frame	Ubx frame buffer
ubx_frame_size	Ubx frame buffer size
msg_cls	Message class
msg_id	Message id
payload	Payload buffer
payload_size	Payload buffer size

Returns

positive integer denoting the length of the ubx frame created

negative errno code if failure

modem_ubx_init()

int modem_ubx_init	(	struct modem_ubx *	ubx,
		const struct modem_ubx_config *	config
	)

#include <include/zephyr/modem/ubx.h>

Initialize Modem Ubx instance.

Parameters

ubx	Modem Ubx instance
config	Configuration which shall be applied to the Modem Ubx instance

Note

Modem Ubx instance must be attached to a pipe instance

modem_ubx_release()

void modem_ubx_release

(

struct modem_ubx *

ubx

)

#include <include/zephyr/modem/ubx.h>

Release pipe from Modem Ubx instance.

Parameters

ubx	Modem Ubx instance

modem_ubx_run_script()

int modem_ubx_run_script	(	struct modem_ubx *	ubx,
		const struct modem_ubx_script *	script
	)

#include <include/zephyr/modem/ubx.h>

Writes the ubx frame in script.request and reads back its response (if available)

For each ubx frame sent, the device responds in 0, 1 or both of the following ways:

1. The device sends back a UBX-ACK frame to denote 'acknowledge' and 'not-acknowledge'. Note: the message id of UBX-ACK frame determines whether the device acknowledged. Ex: when we send a UBX-CFG frame, the device responds with a UBX-ACK frame.
2. The device sends back the same frame that we sent to it, with it's payload populated. It's used to get the current configuration corresponding to the frame that we sent. Ex: frame types such as "get" or "poll" ubx frames respond this way. This response (if received) is written to script.response.

This function writes the ubx frame in script.request then reads back it's response. If script.match is not NULL, then every ubx frame received from the device is compared with script.match to check if a match occurred. This could be used to match UBX-ACK frame sent from the device by populating script.match with UBX-ACK that the script expects to receive.

The script terminates when either of the following happens:

1. script.match is successfully received and matched.
2. timeout (denoted by script.timeout) occurs.

   Parameters

   ubx	Modem Ubx instance
   script	Script to be executed

   Note

   The length of ubx frame in the script.request should not exceed UBX_FRM_SZ_MAX

   Modem Ubx instance must be attached to a pipe instance

   Returns

   0 if device acknowledged via UBX-ACK and no "get" response was received

   positive integer denoting the length of "get" response that was received

   negative errno code if failure