+int CmdHF14BWrite( const char *Cmd){
+
+/*
+ * For SRIX4K blocks 00 - 7F
+ * hf 14b raw -c -p 09 $srix4kwblock $srix4kwdata
+ *
+ * For SR512 blocks 00 - 0F
+ * hf 14b raw -c -p 09 $sr512wblock $sr512wdata
+ *
+ * Special block FF = otp_lock_reg block.
+ * Data len 4 bytes-
+ */
+ char cmdp = param_getchar(Cmd, 0);
+ uint8_t blockno = -1;
+ uint8_t data[4] = {0x00};
+ bool isSrix4k = true;
+ char str[20];
+
+ if (cmdp == 'h' || cmdp == 'H') {
+ PrintAndLog("Usage: hf 14b write <1|2> <BLOCK> <DATA>");
+ PrintAndLog(" [1 = SRIX4K]");
+ PrintAndLog(" [2 = SRIX4K]");
+ PrintAndLog(" [BLOCK number depends on which tag, special block == 255]");
+ PrintAndLog(" sample: hf 14b write 1 127 11223344");
+ PrintAndLog(" : hf 14b write 1 255 11223344");
+ PrintAndLog(" : hf 14b write 2 15 11223344");
+ PrintAndLog(" : hf 14b write 2 255 11223344");
+ return 0;
+ }
+
+ if ( param_getchar(Cmd, 0) == '2' )
+ isSrix4k = false;
+
+ blockno = param_get8(Cmd, 1);
+
+ if ( isSrix4k ){
+ if ( blockno > 0x7f && blockno != 0xff ){
+ PrintAndLog("Block number out of range");
+ return 0;
+ }
+ } else {
+ if ( blockno > 0x0f && blockno != 0xff ){
+ PrintAndLog("Block number out of range");
+ return 0;
+ }
+ }
+
+ if (param_gethex(Cmd, 2, data, 8)) {
+ PrintAndLog("Data must include 8 HEX symbols");
+ return 0;
+ }
+
+ if ( blockno == 0xff)
+ PrintAndLog("Writing to special block %02X [ %s]", blockno, sprint_hex(data,4) );
+ else
+ PrintAndLog("Writing to block %02X [ %s]", blockno, sprint_hex(data,4) );
+
+ sprintf(str, "-c -p 09 %02x %02x%02x%02x%02x", blockno, data[0], data[1], data[2], data[3]);
+ CmdHF14BCmdRaw(str);
+ return 0;
+}
+