v1.0.0

* Initial release for SX1302 CoreCell Reference Design.

tools/payload_tools/payload_diff.c

@@ -0,0 +1,116 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+
+/* -------------------------------------------------------------------------- */
+/* --- MACROS --------------------------------------------------------------- */
+
+#define TAKE_N_BITS_FROM(b, p, n) (((b) >> (p)) & ((1 << (n)) - 1))
+
+/* -------------------------------------------------------------------------- */
+/* --- SUBFUNCTIONS DECLARATION --------------------------------------------- */
+
+static void usage(void);
+void remove_spaces(char *str);
+
+/* -------------------------------------------------------------------------- */
+/* --- MAIN FUNCTION -------------------------------------------------------- */
+
+int main(int argc, char ** argv)
+{
+    int i, j;
+    uint8_t payload_a[255];
+    uint8_t payload_b[255];
+    uint8_t payload_diff[255];
+    uint8_t payload_size;
+    char hexstr[1024];
+    uint16_t nb_bits_diff = 0;
+
+    if (argc < 3) {
+        usage();
+        return -1;
+    }
+
+    if (strlen(argv[1]) != strlen(argv[2])) {
+        printf("ERROR: payloads A & B must have same size\n");
+        return -1;
+    }
+
+    /* Get payload A hex string from command line */
+    memcpy(hexstr, argv[1], strlen(argv[1]));
+    hexstr[strlen(argv[1])] = '\0';
+    printf("Input hex string: %s\n", hexstr);
+
+    /* Remove spaces from the string if any */
+    remove_spaces(hexstr);
+    hexstr[strlen(hexstr)] = '\0';
+    printf("Removing spaces: %s\n", hexstr);
+
+    /* Convert hex string to byte array */
+    payload_size = strlen(hexstr) / 2;
+    for (j = 0; j < payload_size; j++) {
+        sscanf(hexstr + 2*j, "%02hhx", &payload_a[j]);
+    }
+
+    /* Get payload B hex string from command line */
+    memcpy(hexstr, argv[2], strlen(argv[2]));
+    hexstr[strlen(argv[2])] = '\0';
+    printf("Input hex string: %s\n", hexstr);
+
+    /* Remove spaces from the string if any */
+    remove_spaces(hexstr);
+    hexstr[strlen(hexstr)] = '\0';
+    printf("Removing spaces: %s\n", hexstr);
+
+    /* Convert hex string to byte array */
+    for (j = 0; j < payload_size; j++) {
+        sscanf(hexstr + 2*j, "%02hhx", &payload_b[j]);
+    }
+
+    /* Count how many bits differs */
+    printf("Diff: ");
+    for (j = 0; j < payload_size; j++) {
+        payload_diff[j] = payload_a[j] ^ payload_b[j];
+        printf("%02X ", payload_diff[j]);
+    }
+    printf("\n");
+
+    for (j = 0; j < payload_size; j++) {
+        for (i = 7; i >= 0; i--) {
+            printf("%u", TAKE_N_BITS_FROM(payload_diff[j], i, 1));
+            if (TAKE_N_BITS_FROM(payload_diff[j], i, 1) == 1) {
+                nb_bits_diff += 1;
+            }
+        }
+        printf(" ");
+    }
+    printf("\n");
+    printf("%u bits flipped\n", nb_bits_diff);
+
+    return 0;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+void usage(void) {
+    printf("Missing payload hex strings for a & b\n");
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+void remove_spaces(char *str)
+{
+    /* To keep track of non-space character count */
+    int count = 0;
+
+    /* Traverse the given string. If current character
+        is not space, then place it at index 'count++' */
+    for (int i = 0; str[i]; i++) {
+        if (str[i] != ' ') {
+            str[count++] = str[i]; /* here count is incremented */
+        }
+    }
+    str[count] = '\0';
+}
+