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Add generic tear-off hook

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This commit is contained in:
Philippe Teuwen
2020-10-09 01:52:42 +02:00
parent f3a3a94fea
commit 7f8a4b4182
5 changed files with 119 additions and 16 deletions
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36
armsrc/appmain.c
View File

@@ -68,6 +68,24 @@ extern uint32_t _stack_start, _stack_end;
struct common_area common_area __attribute__((section(".commonarea")));
static int button_status = BUTTON_NO_CLICK;
static bool allow_send_wtx = false;
static uint32_t tearoff_delay_us = 0;
static bool tearoff_enabled = false;
int tearoff_hook(void) {
if (tearoff_enabled) {
if (tearoff_delay_us == 0) {
Dbprintf(_RED_("No tear-off delay configured!"));
return PM3_SUCCESS; // SUCCESS = the hook didn't do anything
}
WaitUS(tearoff_delay_us);
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
tearoff_enabled = false;
Dbprintf(_YELLOW_("Tear-off triggered!"));
return PM3_ETEAROFF;
} else {
return PM3_SUCCESS; // SUCCESS = the hook didn't do anything
}
}
void send_wtx(uint16_t wtx) {
if (allow_send_wtx) {
@@ -731,6 +749,24 @@ static void PacketReceived(PacketCommandNG *packet) {
reply_ng(CMD_SET_DBGMODE, PM3_SUCCESS, NULL, 0);
break;
}
case CMD_SET_TEAROFF: {
struct p {
uint32_t delay_us;
bool on;
bool off;
} PACKED;
struct p *payload = (struct p *)packet->data.asBytes;
if (payload->on && payload->off)
reply_ng(CMD_SET_TEAROFF, PM3_EINVARG, NULL, 0);
if (payload->on)
tearoff_enabled = true;
if (payload->off)
tearoff_enabled = false;
if (payload->delay_us > 0)
tearoff_delay_us = payload->delay_us;
reply_ng(CMD_SET_TEAROFF, PM3_SUCCESS, NULL, 0);
break;
}
// always available
case CMD_HF_DROPFIELD: {
hf_field_off();

2
armsrc/appmain.h
View File

@@ -16,6 +16,8 @@
extern int g_rsamples; // = 0;
extern uint8_t g_trigger;
int tearoff_hook(void);
// ADC Vref = 3300mV, and an (10M+1M):1M voltage divider on the HF input can measure voltages up to 36300 mV
#define MAX_ADC_HF_VOLTAGE 36300
// ADC Vref = 3300mV, (240k-10M):240k voltage divider, 140800 mV

39
armsrc/lfops.c
View File

@@ -2573,15 +2573,20 @@ void EM4xWriteWord(uint8_t addr, uint32_t data, uint32_t pwd, uint8_t usepwd) {
SendForward(len);
// Wait 20ms for write to complete?
// No, when write is denied, err preamble comes much sooner
//WaitUS(10820); // tPC+tWEE
if (tearoff_hook() == PM3_ETEAROFF) { // tearoff occured
StopTicks();
reply_ng(CMD_LF_EM4X_WRITEWORD, PM3_ETEAROFF, NULL, 0);
} else {
// Wait 20ms for write to complete?
// No, when write is denied, err preamble comes much sooner
//WaitUS(10820); // tPC+tWEE
DoPartialAcquisition(0, false, 6000, 1000);
DoPartialAcquisition(0, false, 6000, 1000);
StopTicks();
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
reply_ng(CMD_LF_EM4X_WRITEWORD, PM3_SUCCESS, NULL, 0);
StopTicks();
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
reply_ng(CMD_LF_EM4X_WRITEWORD, PM3_SUCCESS, NULL, 0);
}
LEDsoff();
}
@@ -2610,15 +2615,19 @@ void EM4xProtectWord(uint32_t data, uint32_t pwd, uint8_t usepwd) {
SendForward(len);
// Wait 20ms for write to complete?
// No, when write is denied, err preamble comes much sooner
//WaitUS(13640); // tPC+tPR
if (tearoff_hook() == PM3_ETEAROFF) { // tearoff occured
StopTicks();
reply_ng(CMD_LF_EM4X_PROTECTWORD, PM3_ETEAROFF, NULL, 0);
} else {
// Wait 20ms for write to complete?
// No, when write is denied, err preamble comes much sooner
//WaitUS(13640); // tPC+tPR
DoPartialAcquisition(0, false, 6000, 1000);
StopTicks();
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
reply_ng(CMD_LF_EM4X_PROTECTWORD, PM3_SUCCESS, NULL, 0);
DoPartialAcquisition(0, false, 6000, 1000);
StopTicks();
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
reply_ng(CMD_LF_EM4X_PROTECTWORD, PM3_SUCCESS, NULL, 0);
}
LEDsoff();
}