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Update lf_em4100emul.c

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Rename fucntions (to avoid conflictinf with other standalone modes), print what ID is emulating and allow exit emulation with button long-press 

Signed-off-by: Dani <danidrach@gmail.com>
This commit is contained in:
Dani 2024-06-23 17:14:59 +02:00 • committed by GitHub
commit a8ac0f3053
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GPG key ID: B5690EEEBB952194
1 changed files with 19 additions and 9 deletions
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28
armsrc/Standalone/lf_em4100emul.c
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@ -41,7 +41,7 @@ void ModInfo(void) {
DbpString(" LF EM4100 simulator standalone mode");
}
static uint64_t rev_quads(uint64_t bits) {
static uint64_t em4100emul_rev_quads(uint64_t bits) {
uint64_t result = 0;
for (int i = 0; i < 16; i++) {
result += ((bits >> (60 - 4 * i)) & 0xf) << (4 * i);
@ -49,7 +49,7 @@ static uint64_t rev_quads(uint64_t bits) {
return result >> 24;
}
static void fill_buff(uint8_t bit) {
static void em4100emul_fill_buff(uint8_t bit) {
uint8_t *bba = BigBuf_get_addr();
memset(bba + em4100emul_buflen, bit, LF_CLOCK / 2);
em4100emul_buflen += (LF_CLOCK / 2);
@ -57,7 +57,7 @@ static void fill_buff(uint8_t bit) {
em4100emul_buflen += (LF_CLOCK / 2);
}
static void construct_EM410x_emul(uint64_t id) {
static void em4100emul_construct_EM410x_emul(uint64_t id) {
int i, j;
int binary[4] = {0, 0, 0, 0};
@ -65,24 +65,24 @@ static void construct_EM410x_emul(uint64_t id) {
em4100emul_buflen = 0;
for (i = 0; i < 9; i++)
fill_buff(1);
em4100emul_fill_buff(1);
for (i = 0; i < 10; i++) {
for (j = 3; j >= 0; j--, id /= 2)
binary[j] = id % 2;
for (j = 0; j < 4; j++)
fill_buff(binary[j]);
em4100emul_fill_buff(binary[j]);
fill_buff(binary[0] ^ binary[1] ^ binary[2] ^ binary[3]);
em4100emul_fill_buff(binary[0] ^ binary[1] ^ binary[2] ^ binary[3]);
for (j = 0; j < 4; j++)
parity[j] ^= binary[j];
}
for (j = 0; j < 4; j++)
fill_buff(parity[j]);
em4100emul_fill_buff(parity[j]);
fill_buff(0);
em4100emul_fill_buff(0);
}
static void LED_Slot(int i) {
@ -108,8 +108,18 @@ void RunMod(void) {
SpinDelay(100);
SpinUp(100);
LED_Slot(selected);
construct_EM410x_emul(rev_quads(em4100emul_low[selected]));
Dbprintf("Emulating 0x%010llX", em4100emul_low[selected]);
em4100emul_construct_EM410x_emul(em4100emul_rev_quads(em4100emul_low[selected]));
SimulateTagLowFrequency(em4100emul_buflen, 0, true);
//Exit! Button hold break
int button_pressed = BUTTON_HELD(500);
if (button_pressed == BUTTON_HOLD) {
Dbprintf("Button hold, Break!");
LEDsoff();
Dbprintf("[=] >> LF EM4100 simulator stopped due to button hold <<");
return; // RunMod end
}
selected = (selected + 1) % em4100emul_slots_count;
}
}