RfidResearchGroup/proxmark3
1
1
Fork 0
mirror of https://github.com/RfidResearchGroup/proxmark3.git synced 2025-02-13 02:34:48 +08:00
Code Issues Projects Releases Packages Wiki Activity

[rleroy] add signal strength meter to 'detectreader' command (HF only)

Browse source
This commit is contained in:
adam@algroup.co.uk 2009-07-21 11:15:32 +00:00
parent 8e7a6ce409
commit ebd7aaf9e7
1 changed files with 165 additions and 82 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

247
armsrc/appmain.c
View file

@ -1090,85 +1090,168 @@ void SamyRun()
}
// listen for external reader
void ListenReaderField(int limit)
{
int lf_av, lf_av_new, lf_baseline= 0, lf_count= 0;
int hf_av, hf_av_new, hf_baseline= 0, hf_count= 0;
#define LF_ONLY 1
#define HF_ONLY 2
LED_A_OFF();
LED_B_OFF();
LED_C_OFF();
LED_D_OFF();
lf_av= ReadAdc(ADC_CHAN_LF);
if(limit != HF_ONLY)
{
DbpString("LF 125/134 Baseline:");
DbpIntegers(lf_av,0,0);
lf_baseline= lf_av;
}
hf_av= ReadAdc(ADC_CHAN_HF);
if (limit != LF_ONLY)
{
DbpString("HF 13.56 Baseline:");
DbpIntegers(hf_av,0,0);
hf_baseline= hf_av;
}
for(;;)
{
if(BUTTON_PRESS())
{
DbpString("Stopped");
LED_B_OFF();
LED_D_OFF();
return;
}
WDT_HIT();
if (limit != HF_ONLY)
{
if (abs(lf_av - lf_baseline) > 10)
LED_D_ON();
else
LED_D_OFF();
++lf_count;
lf_av_new= ReadAdc(ADC_CHAN_LF);
// see if there's a significant change
if(abs(lf_av - lf_av_new) > 10)
{
DbpString("LF 125/134 Field Change:");
DbpIntegers(lf_av,lf_av_new,lf_count);
lf_av= lf_av_new;
lf_count= 0;
}
}
if (limit != LF_ONLY)
{
if (abs(hf_av - hf_baseline) > 10)
LED_B_ON();
else
LED_B_OFF();
++hf_count;
hf_av_new= ReadAdc(ADC_CHAN_HF);
// see if there's a significant change
if(abs(hf_av - hf_av_new) > 10)
{
DbpString("HF 13.56 Field Change:");
DbpIntegers(hf_av,hf_av_new,hf_count);
hf_av= hf_av_new;
hf_count= 0;
}
}
}
}
/*
OBJECTIVE
Listen and detect an external reader. Determine the best location
for the antenna.
INSTRUCTIONS:
Inside the ListenReaderField() function, there is two mode.
By default, when you call the function, you will enter mode 1.
If you press the PM3 button one time, you will enter mode 2.
If you press the PM3 button a second time, you will exit the function.
DESCRIPTION OF MODE 1:
This mode just listens for an external reader field and lights up green
for HF and/or red for LF. This is the original mode of the detectreader
function.
DESCRIPTION OF MODE 2:
This mode will visually represent, using the LEDs, the actual strength of the
current compared to the maximum current detected. Basically, once you know
what kind of external reader is present, it will help you spot the best location to place
your antenna. You will probably not get some good results if there is a LF and a HF reader
at the same place! :-)
LIGHT SCHEME USED:
Light scheme | Descriptiong
----------------------------------------------------
---- | No field detected
X--- | 14% of maximum current detected
-X-- | 29% of maximum current detected
--X- | 43% of maximum current detected
---X | 57% of maximum current detected
--XX | 71% of maximum current detected
-XXX | 86% of maximum current detected
XXXX | 100% of maximum current detected
TODO:
Add the LF part for MODE 2
*/
void ListenReaderField(int limit)
{
int lf_av, lf_av_new, lf_baseline= 0, lf_count= 0;
int hf_av, hf_av_new, hf_baseline= 0, hf_count= 0, hf_max;
int mode=1;
#define LF_ONLY 1
#define HF_ONLY 2
LED_A_OFF();
LED_B_OFF();
LED_C_OFF();
LED_D_OFF();
lf_av= ReadAdc(ADC_CHAN_LF);
if(limit != HF_ONLY)
{
DbpString("LF 125/134 Baseline:");
DbpIntegers(lf_av,0,0);
lf_baseline= lf_av;
}
hf_av=hf_max=ReadAdc(ADC_CHAN_HF);
if (limit != LF_ONLY)
{
DbpString("HF 13.56 Baseline:");
DbpIntegers(hf_av,0,0);
hf_baseline= hf_av;
}
for(;;)
{
if (BUTTON_PRESS()) {
SpinDelay(500);
switch (mode) {
case 1:
mode=2;
DbpString("Signal Strength Mode");
break;
case 2:
default:
DbpString("Stopped");
LED_A_OFF();
LED_B_OFF();
LED_C_OFF();
LED_D_OFF();
return;
break;
}
}
WDT_HIT();
if (limit != HF_ONLY)
{
if (abs(lf_av - lf_baseline) > 10)
LED_D_ON();
else
LED_D_OFF();
++lf_count;
lf_av_new= ReadAdc(ADC_CHAN_LF);
// see if there's a significant change
if(abs(lf_av - lf_av_new) > 10)
{
DbpString("LF 125/134 Field Change:");
DbpIntegers(lf_av,lf_av_new,lf_count);
lf_av= lf_av_new;
lf_count= 0;
}
}
if (limit != LF_ONLY)
{
if (abs(hf_av - hf_baseline) > 10) {
if (mode == 1)
LED_B_ON();
if (mode == 2) {
if ( hf_av>(hf_max/7)*6) {
LED_A_ON(); LED_B_ON(); LED_C_ON(); LED_D_ON();
}
if ( (hf_av>(hf_max/7)*5) && (hf_av<=(hf_max/7)*6) ) {
LED_A_ON(); LED_B_ON(); LED_C_OFF(); LED_D_ON();
}
if ( (hf_av>(hf_max/7)*4) && (hf_av<=(hf_max/7)*5) ) {
LED_A_OFF(); LED_B_ON(); LED_C_OFF(); LED_D_ON();
}
if ( (hf_av>(hf_max/7)*3) && (hf_av<=(hf_max/7)*4) ) {
LED_A_OFF(); LED_B_OFF(); LED_C_OFF(); LED_D_ON();
}
if ( (hf_av>(hf_max/7)*2) && (hf_av<=(hf_max/7)*3) ) {
LED_A_OFF(); LED_B_ON(); LED_C_OFF(); LED_D_OFF();
}
if ( (hf_av>(hf_max/7)*1) && (hf_av<=(hf_max/7)*2) ) {
LED_A_ON(); LED_B_OFF(); LED_C_OFF(); LED_D_OFF();
}
if ( (hf_av>(hf_max/7)*0) && (hf_av<=(hf_max/7)*1) ) {
LED_A_OFF(); LED_B_OFF(); LED_C_ON(); LED_D_OFF();
}
}
} else {
if (mode == 1) {
LED_B_OFF();
}
if (mode == 2) {
LED_A_OFF(); LED_B_OFF(); LED_C_OFF(); LED_D_OFF();
}
}
++hf_count;
hf_av_new= ReadAdc(ADC_CHAN_HF);
// see if there's a significant change
if(abs(hf_av - hf_av_new) > 10)
{
DbpString("HF 13.56 Field Change:");
DbpIntegers(hf_av,hf_av_new,hf_count);
hf_av= hf_av_new;
if (hf_av > hf_max)
hf_max = hf_av;
hf_count= 0;
}
}
}
}