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simplify hf em 4x50 eload. all fits in one usb package

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This commit is contained in:
iceman1001
2026-08-29 12:48:20 +02:00
parent d71ee36996
commit 795d6f6fe3
1 changed files with 23 additions and 39 deletions
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client/src/cmdlfem4x50.c
+23 -39
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@@ -165,51 +165,35 @@ static int em4x50_load_file(const char *filename, uint8_t *data, size_t data_len
static int em4x50_seteml(const uint8_t *src, uint32_t offset, uint32_t numofbytes) {
const size_t max_chunk = PM3_CMD_DATA_SIZE - sizeof(em4x50_eset_t);
// an EM4x50 is 136 bytes, so the whole tag always fits in a single frame
if ((offset + numofbytes) > (PM3_CMD_DATA_SIZE - sizeof(em4x50_eset_t))) {
PrintAndLogEx(FAILED, "%u bytes at offset %u doesn't fit in one frame", numofbytes, offset);
return PM3_EOUTOFBOUND;
}
PrintAndLogEx(INFO, "uploading to emulator memory");
uint8_t buf[PM3_CMD_DATA_SIZE] = {0};
em4x50_eset_t *payload = (em4x50_eset_t *)buf;
payload->offset = offset;
payload->len = numofbytes;
memcpy(payload->data, src + offset, numofbytes);
PrintAndLogEx(INFO, "uploading to emulator memory");
PrintAndLogEx(INFO, "." NOLF);
clearCommandBuffer();
SendCommandNG(CMD_LF_EM4X50_ESET, buf, sizeof(em4x50_eset_t) + numofbytes);
// fast push mode
g_conn.block_after_ACK = true;
for (size_t i = offset; i < numofbytes; i += max_chunk) {
size_t len = MIN((numofbytes - i), max_chunk);
if (len == numofbytes - i) {
// Disable fast mode on last packet
g_conn.block_after_ACK = false;
}
payload->offset = i;
payload->len = len;
memcpy(payload->data, src + i, len);
clearCommandBuffer();
SendCommandNG(CMD_LF_EM4X50_ESET, buf, sizeof(em4x50_eset_t) + len);
PacketResponseNG resp;
if (WaitForResponseTimeout(CMD_LF_EM4X50_ESET, &resp, 2000) == false) {
g_conn.block_after_ACK = false;
PrintAndLogEx(NORMAL, "");
PrintAndLogEx(WARNING, "timeout while waiting for reply");
return PM3_ETIMEOUT;
}
if (resp.status != PM3_SUCCESS) {
g_conn.block_after_ACK = false;
PrintAndLogEx(NORMAL, "");
PrintAndLogEx(FAILED, "uploading to emulator memory ( " _RED_("fail") " )");
return resp.status;
}
PrintAndLogEx(NORMAL, "." NOLF);
fflush(stdout);
PacketResponseNG resp;
if (WaitForResponseTimeout(CMD_LF_EM4X50_ESET, &resp, 2000) == false) {
PrintAndLogEx(WARNING, "timeout while waiting for reply");
return PM3_ETIMEOUT;
}
PrintAndLogEx(NORMAL, "");
PrintAndLogEx(SUCCESS, "uploaded " _YELLOW_("%d") " bytes to emulator memory", numofbytes);
if (resp.status != PM3_SUCCESS) {
PrintAndLogEx(FAILED, "uploading to emulator memory ( " _RED_("fail") " )");
return resp.status;
}
PrintAndLogEx(SUCCESS, "uploaded " _YELLOW_("%u") " bytes to emulator memory", numofbytes);
return PM3_SUCCESS;
}