mirror of https://github.com/ArduPilot/ardupilot
85 lines
1.8 KiB
C
85 lines
1.8 KiB
C
/*
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* Simple tool to dump the AP_Var contents from an EEPROM dump
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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uint8_t eeprom[0x1000];
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#pragma pack(1)
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struct EEPROM_header {
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uint16_t magic;
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uint8_t revision;
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uint8_t spare;
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};
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static const uint16_t k_EEPROM_magic = 0x5041;
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static const uint16_t k_EEPROM_revision = 2;
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struct Var_header {
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uint8_t size : 6;
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uint8_t spare : 2;
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uint8_t key;
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};
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static const uint8_t k_key_sentinel = 0xff;
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void
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fail(const char *why)
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{
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fprintf(stderr, "ERROR: %s\n", why);
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exit(1);
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}
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int
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main(int argc, char *argv[])
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{
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FILE *fp;
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struct EEPROM_header *header;
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struct Var_header *var;
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unsigned index;
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unsigned i;
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if (argc != 2) {
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fail("missing EEPROM file name");
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}
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if (NULL == (fp = fopen(argv[1], "rb"))) {
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fail("can't open EEPROM file");
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}
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if (1 != fread(eeprom, sizeof(eeprom), 1, fp)) {
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fail("can't read EEPROM file");
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}
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fclose(fp);
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header = (struct EEPROM_header *)&eeprom[0];
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if (header->magic != k_EEPROM_magic) {
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fail("bad magic in EEPROM file");
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}
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if (header->revision != 2) {
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fail("unsupported EEPROM format revision");
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}
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printf("Header OK\n");
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index = sizeof(*header);
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for (;; ) {
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var = (struct Var_header *)&eeprom[index];
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if (var->key == k_key_sentinel) {
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printf("end sentinel at %u\n", index);
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break;
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}
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printf("%04x: key %u size %d\n ", index, var->key, var->size + 1);
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index += sizeof(*var);
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for (i = 0; i <= var->size; i++) {
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printf(" %02x", eeprom[index + i]);
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}
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printf("\n");
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index += var->size + 1;
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if (index >= sizeof(eeprom)) {
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fflush(stdout);
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fail("missing end sentinel");
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}
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}
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}
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