From 6a772a1273e0f18c33e8214f52f281912dac8471 Mon Sep 17 00:00:00 2001 From: marshmellow42 Date: Fri, 31 Mar 2017 12:52:30 -0400 Subject: [PATCH] add verification data was entered-lf em 4x05 write --- client/cmdlfem4x.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/client/cmdlfem4x.c b/client/cmdlfem4x.c index e5bea068..7eb6070d 100644 --- a/client/cmdlfem4x.c +++ b/client/cmdlfem4x.c @@ -914,6 +914,9 @@ int usage_lf_em_write(void) { return 0; } +// note: em4x05 doesn't have a way to invert data output so we must invert the data prior to writing +// it if invertion is needed. (example FSK2a vs FSK) +// also em4x05 requires swapping word data when compared to the data used for t55xx chips. int EM4x05WriteWord(uint8_t addr, uint32_t data, uint32_t pwd, bool usePwd, bool swap, bool invert) { if (swap) data = SwapBits(data, 32); @@ -962,7 +965,7 @@ int CmdEM4x05WriteWord(const char *Cmd) { bool swap = false; bool invert = false; uint8_t addr = 16; // default to invalid address - + bool gotData = false; char cmdp = 0; while(param_getchar(Cmd, cmdp) != 0x00) { @@ -979,6 +982,7 @@ int CmdEM4x05WriteWord(const char *Cmd) { case 'd': case 'D': data = param_get32ex(Cmd, cmdp+1, 0, 16); + gotData = true; cmdp += 2; break; case 'i': @@ -1013,6 +1017,10 @@ int CmdEM4x05WriteWord(const char *Cmd) { if ( strlen(Cmd) == 0 ) return usage_lf_em_write(); + if (!gotData) { + PrintAndLog("You must enter the data you want to write"); + return usage_lf_em_write(); + } return EM4x05WriteWord(addr, data, pwd, usePwd, swap, invert); } -- 2.39.5