fixing iso15693

* NOISE_THRESHOLD /= 2 (starting with c41dd5f it became a relative threshold)
* remove superfluous reader initialization

diff --git a/armsrc/iso15693.c b/armsrc/iso15693.c
index 5672e66d15347bc5c7e3ca7e34dff8d17fd429c1..f16698bbb901f66120d67a528f6a077fad2118bc 100644 (file)
--- a/armsrc/iso15693.c
+++ b/armsrc/iso15693.c
@@ -368,7 +368,7 @@ void TransmitTo15693Reader(const uint8_t *cmd, size_t len, uint32_t *start_time,
 //          false if we are still waiting for some more
 //=============================================================================
 
-#define NOISE_THRESHOLD          160                   // don't try to correlate noise
+#define NOISE_THRESHOLD          80                   // don't try to correlate noise
 #define MAX_PREVIOUS_AMPLITUDE   (-1 - NOISE_THRESHOLD)
 
 typedef struct DecodeTag {
@@ -1571,9 +1571,6 @@ void ReaderIso15693(uint32_t parameter) {
 
        LED_A_ON();
 
-       Iso15693InitReader();
-
-       StartCountSspClk();
        set_tracing(true);
 
        uint8_t TagUID[8] = {0x00};