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fixed em4x50_sim_read_bit

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mifa-om 2024-05-15 11:34:44 +02:00
commit 12f9ac5275
1 changed files with 5 additions and 1 deletions
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6
armsrc/em4x50.c
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@ -1255,7 +1255,11 @@ static int em4x50_sim_read_bit(void) {
int cycles = 0;
int timeout = EM4X50_T_SIMULATION_TIMEOUT_READ;
while (cycles < EM4X50_T_TAG_FULL_PERIOD) {
// wait 16 cycles to make sure there is no field when reading a "0" bit
uint32_t waitval = GetTicks();
while(GetTicks() - waitval < EM4X50_T_TAG_QUARTER_PERIOD * CYCLES2TICKS);
while (cycles < EM4X50_T_TAG_THREE_QUARTER_PERIOD) {
// wait until reader field disappears
while ((timeout--) && !(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK));