SP8EBC-ParaTNC/src/kiss_protocol/kiss_did.c

65 wiersze
2.0 KiB
C

/*
* kiss_did.c
*
* Implementation of all arrays defining data source for DIDs and function
* which generate raw binary data to be returned to a tester
*
* Created on: Jun 27, 2023
* Author: mateusz
*/
#include <etc/kiss_did_configuration.h>
#include <etc/kiss_configuation.h>
//!< Dummy variable used only as end of definition marker in tables
char did_dummy_data;
//!< Structure to define a DID which return numeric data
typedef struct kiss_did_numeric_definition_t {
uint16_t identifier;
void* first_data;
uint8_t first_data_size;
void* second_data;
uint8_t second_data_size;
void* third_data;
uint8_t third_data_size;
}kiss_did_numeric_definition_t;
//!< Definition of all DIDs with numeric data
const static kiss_did_numeric_definition_t kiss_did_def[] = {
DIDS_NUMERIC(DID_NUMERIC_DEFINITION_EXPANDER)
};
/**
* Creates a response for DID request into specified buffer. Please take into account
* that this function cannot use full size of this buffer. The exact content of the
* response is: FEND, NONSTANDARD, KISS_READ_DID_RESP, DID LSB, DID MSB, data, FEND.
* So in practice payload data may use only buffer_ln - 6 bytes of data.
*
* @param identifier
* @param output_buffer pointer to buffer where response will be generated into
* @param buffer_ln a size of this buffer, please be aware of note about available buffer!
*/
void kiss_did_response(uint16_t identifier, uint8_t * output_buffer, uint16_t buffer_ln) {
// iterator to go through DID definition
int i = 0;
// data of a did found in configuration
kiss_did_numeric_definition_t found = {.identifier = 0xFFFFu};
// iterate through DID definition and check if this id exist there
do {
// check if current position is the DID we're looking for
if (kiss_did_def[i].identifier == identifier) {
// if yes copy this data and exit the loop
found = kiss_did_def[i];
}
else {
// if no, go to the next DID definition
i++;
}
} while (kiss_did_def[i].identifier != 0xFFFFU);
}