cardem: choose a more reasonable default ATR
PCSCd does not like invalid ATRs
Change-Id: I1eebfdc06be55931c2e80e2b515ac3a559737c38
diff --git a/host/src/simtrace2-cardem-pcsc.c b/host/src/simtrace2-cardem-pcsc.c
index 883bad1..f11330c 100644
--- a/host/src/simtrace2-cardem-pcsc.c
+++ b/host/src/simtrace2-cardem-pcsc.c
@@ -52,6 +52,26 @@
#define ATR_MAX_LEN 33
+
+/* reasonable ATR offering all protocols and voltages
+ * smartphones might not care, but other readers do
+ *
+ * TS = 0x3B Direct Convention
+ * T0 = 0x80 Y(1): b1000, K: 0 (historical bytes)
+ * TD(1) = 0x80 Y(i+1) = b1000, Protocol T=0
+ * ----
+ * TD(2) = 0x81 Y(i+1) = b1000, Protocol T=1
+ * ----
+ * TD(3) = 0x1F Y(i+1) = b0001, Protocol T=15
+ * ----
+ * TA(4) = 0xC7 Clock stop: no preference - Class accepted by the card: (3G) A 5V B 3V C 1.8V
+ * ----
+ * Historical bytes
+ * TCK = 0x59 correct checksum
+ */
+#define DEFAULT_ATR_STR "3B8080811FC759"
+
+
static void atr_update_csum(uint8_t *atr, unsigned int atr_len)
{
uint8_t csum = 0;
@@ -274,7 +294,7 @@
int rc;
int c, ret = 1;
int skip_atr = 0;
- char *atr = "3b00";
+ char *atr = DEFAULT_ATR_STR;
uint8_t real_atr[ATR_MAX_LEN];
int atr_len;
int keep_running = 0;