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comment fudan check possibilities

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marshmellow42 2015-06-20 21:33:42 -04:00
parent f4217d58b6
commit 7c8b5e6811
1 changed files with 14 additions and 1 deletions
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15
client/cmdhfmfu.c
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@ -276,7 +276,20 @@ static int ulev1_readSignature( uint8_t *response, uint16_t responseLength ){
return len;
}
//make sure field is off before calling this function
// Fudan check checks for which error is given for a command with incorrect crc
// NXP UL chip responds with 01, fudan 00.
// other possible checks:
// send a0 + crc
// UL responds with 00, fudan doesn't respond
// or
// send a200 + crc
// UL doesn't respond, fudan responds with 00
// or
// send 300000 + crc (read with extra byte(s))
// UL responds with read of page 0, fudan doesn't respond.
//
// make sure field is off before calling this function
static int ul_fudan_check( void ){
iso14a_card_select_t card;
if ( !ul_select(&card) )