AP_Param: added eeprom_aaparam.c dump utility

libraries/AP_Common/tools/eedump_apparam.c

@@ -0,0 +1,137 @@
+/*
+ * Simple tool to dump the AP_Param contents from an EEPROM dump
+ * Andrew Tridgell February 2012
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+
+uint8_t	eeprom[0x1000];
+
+#pragma pack(1)
+
+struct EEPROM_header {
+  uint8_t     magic[2];
+  uint8_t     revision;
+  uint8_t     spare;
+};
+
+static const uint16_t   k_EEPROM_magic0     = 0x50;
+static const uint16_t   k_EEPROM_magic1     = 0x41;
+static const uint16_t   k_EEPROM_revision   = 5;
+
+enum ap_var_type {
+    AP_PARAM_NONE    = 0,
+    AP_PARAM_INT8,
+    AP_PARAM_INT16,
+    AP_PARAM_INT32,
+    AP_PARAM_FLOAT,
+    AP_PARAM_VECTOR3F,
+    AP_PARAM_VECTOR6F,
+    AP_PARAM_MATRIX3F,
+    AP_PARAM_GROUP
+};
+
+static const char *type_names[8] = {
+	"NONE", "INT8", "INT16", "INT32", "FLOAT", "VECTOR3F", "MATRIX6F", "GROUP"
+};
+
+struct Param_header {
+        uint8_t    key;
+        uint8_t    group_element;
+        uint8_t    type;
+};
+
+
+static const uint8_t  _sentinal_key   = 0xFF;
+static const uint8_t  _sentinal_type  = 0xFF;
+static const uint8_t  _sentinal_group = 0xFF;
+
+static uint8_t type_size(enum ap_var_type type)
+{
+    switch (type) {
+    case AP_PARAM_NONE:
+    case AP_PARAM_GROUP:
+        return 0;
+    case AP_PARAM_INT8:
+        return 1;
+    case AP_PARAM_INT16:
+        return 2;
+    case AP_PARAM_INT32:
+        return 4;
+    case AP_PARAM_FLOAT:
+        return 4;
+    case AP_PARAM_VECTOR3F:
+        return 3*4;
+    case AP_PARAM_VECTOR6F:
+        return 6*4;
+    case AP_PARAM_MATRIX3F:
+        return 3*3*4;
+    }
+    printf("unknown type %u\n", type);
+    return 0;
+}
+
+static void
+fail(const char *why)
+{
+  fprintf(stderr, "ERROR: %s\n", why);
+  exit(1);
+}
+
+int
+main(int argc, char *argv[])
+{
+	FILE			*fp;
+	struct EEPROM_header	*header;
+	struct Param_header	*var;
+	unsigned		index;
+	unsigned		i;
+
+	if (argc != 2) {
+		fail("missing EEPROM file name");
+	}
+	if (NULL == (fp = fopen(argv[1], "rb"))) {
+		fail("can't open EEPROM file");
+	}
+	if (1 != fread(eeprom, sizeof(eeprom), 1, fp)) {
+		fail("can't read EEPROM file");
+	}
+	fclose(fp);
+
+	header = (struct EEPROM_header *)&eeprom[0];
+	if (header->magic[0] != k_EEPROM_magic0 ||
+	    header->magic[1] != k_EEPROM_magic1) {
+		fail("bad magic in EEPROM file");
+	}
+	if (header->revision != k_EEPROM_revision) {
+		fail("unsupported EEPROM format revision");
+	}
+	printf("Header OK\n");
+
+	index = sizeof(*header);
+	for (;;) {
+		uint8_t size;
+		var = (struct Param_header *)&eeprom[index];
+		if (var->key == _sentinal_key ||
+		    var->group_element == _sentinal_group ||
+		    var->type == _sentinal_type) {
+			printf("end sentinel at %u\n", index);
+			break;
+		}
+		size = type_size(var->type);
+		printf("%04x: type %u (%s) key %u size %d\n ",
+		       index, var->type, type_names[var->type], var->key, size);
+		index += sizeof(*var);
+		for (i = 0; i <= size; i++) {
+			printf(" %02x", eeprom[index + i]);
+		}
+		printf("\n");
+		index += size;
+		if (index >= sizeof(eeprom)) {
+			fflush(stdout);
+			fail("missing end sentinel");
+		}
+	}
+	return 0;
+}