diff options
Diffstat (limited to 'openpicc/application')
| -rw-r--r-- | openpicc/application/iso14443_layer3a.c | 51 |
1 files changed, 25 insertions, 26 deletions
diff --git a/openpicc/application/iso14443_layer3a.c b/openpicc/application/iso14443_layer3a.c index 9150f1f..e412760 100644 --- a/openpicc/application/iso14443_layer3a.c +++ b/openpicc/application/iso14443_layer3a.c @@ -132,8 +132,8 @@ static int prefill_buffer(ssc_dma_tx_buffer_t *dest, const iso14443_frame *src) extern void main_help_print_buffer(ssc_dma_rx_buffer_t *buffer, int *pktcount); void iso14443_layer3a_state_machine (void *pvParameters) { - unsigned long int last_pll_lock = ~0; - int pktcount=0; + unsigned long int last_pll_lock_change = 0; + int pktcount=0, locked, last_was_locked=0; (void)pvParameters; while(1) { ssc_dma_rx_buffer_t* buffer = NULL; @@ -145,40 +145,37 @@ void iso14443_layer3a_state_machine (void *pvParameters) } /* First let's see whether there is a reader */ + locked = pll_is_locked(); + unsigned long int now = xTaskGetTickCount(); switch(state) { case STARTING_UP: /* Fall through */ case ERROR: // do nothing here break; case POWERED_OFF: - if(pll_is_locked()) { - unsigned long int now = xTaskGetTickCount(); - if(now - last_pll_lock > PLL_LOCK_HYSTERESIS) { - /* Go to idle when in POWERED_OFF and pll - * was locked for at least - * PLL_LOCK_HYSTERESIS ticks */ - switch_on = 1; - last_pll_lock = ~0; - LAYER3_DEBUG("PLL locked, switching on \n\r"); - } else last_pll_lock = now; - } else last_pll_lock = ~0; + if(locked && now - last_pll_lock_change > PLL_LOCK_HYSTERESIS) { + /* Go to idle when in POWERED_OFF and pll + * was locked for at least + * PLL_LOCK_HYSTERESIS ticks */ + switch_on = 1; + LAYER3_DEBUG("PLL locked, switching on \n\r"); + } break; default: - if(!pll_is_locked()) { - unsigned long int now = xTaskGetTickCount(); - if(now - last_pll_lock > PLL_LOCK_HYSTERESIS) { - /* Power off when not powered off and pll - * was unlocked for at least PLL_LOCK_HYSTERESIS - * ticks */ - state = POWERED_OFF; - ssc_rx_stop(); - last_pll_lock = ~0; - LAYER3_DEBUG("PLL lost lock, switching off \n\r"); - continue; - } else last_pll_lock = now; - } else last_pll_lock = ~0; + if(!locked && now - last_pll_lock_change > PLL_LOCK_HYSTERESIS) { + /* Power off when not powered off and pll + * was unlocked for at least PLL_LOCK_HYSTERESIS + * ticks */ + state = POWERED_OFF; + ssc_rx_stop(); + LAYER3_DEBUG("PLL lost lock, switching off \n\r"); + continue; + } break; } + if( (!locked && last_was_locked) || (locked && !last_was_locked) ) + last_pll_lock_change = now; + last_was_locked = locked; switch(state) { case STARTING_UP: @@ -200,6 +197,8 @@ void iso14443_layer3a_state_machine (void *pvParameters) state = POWERED_OFF; + last_was_locked = 0; + vTaskDelay(200*portTICK_RATE_MS); break; case POWERED_OFF: if(switch_on == 1) { |