- added hook for SOF code

7 files changed, 36 insertions, 0 deletions

diff --git a/usbdrv/usbconfig-prototype.h b/usbdrv/usbconfig-prototype.h
index 5883461..03598c1 100644
--- a/usbdrv/usbconfig-prototype.h
+++ b/usbdrv/usbconfig-prototype.h
@@ -156,6 +156,24 @@ section at the end of this file).
  * counts SOF packets. This feature requires that the hardware interrupt is
  * connected to D- instead of D+.
  */
+/* #ifdef __ASSEMBLER__
+ * macro myAssemblerMacro
+ *     in      YL, TCNT0
+ *     sts     timer0Snapshot, YL
+ *     endm
+ * #endif
+ * #define USB_SOF_HOOK                    myAssemblerMacro
+ * This macro (if defined) is executed in the assembler module when a
+ * Start Of Frame condition is detected. It is recommended to define it to
+ * the name of an assembler macro which is defined here as well so that more
+ * than one assembler instruction can be used. The macro may use registers
+ * YL and YH and SREG.
+ * What can you do with this hook? Since the SOF signal occurs exactly every
+ * 1 ms (unless the host is in sleep mode), you can use it to tune OSCCAL in
+ * designs running on the internal RC oscillator.
+ * Please note that Start Of Frame detection works only if D- is wired to the
+ * interrupt, not D+. THIS IS DIFFERENT THAN MOST EXAMPLES!
+ */
 #define USB_CFG_CHECK_DATA_TOGGLING     0
 /* define this macro to 1 if you want to filter out duplicate data packets
  * sent by the host. Duplicates occur only as a consequence of communication
diff --git a/usbdrv/usbdrvasm12.inc b/usbdrv/usbdrvasm12.inc
index 389dbb7..d9da1dc 100644
--- a/usbdrv/usbdrvasm12.inc
+++ b/usbdrv/usbdrvasm12.inc
@@ -69,6 +69,9 @@ waitForK:
     inc     YL
     sts     usbSofCount, YL
 #endif  /* USB_COUNT_SOF */
+#ifdef USB_SOF_HOOK
+    USB_SOF_HOOK
+#endif
     rjmp    sofError
 foundK:
 ;{3, 5} after falling D- edge, average delay: 4 cycles [we want 4 for center sampling]
diff --git a/usbdrv/usbdrvasm128.inc b/usbdrv/usbdrvasm128.inc
index f300865..effed45 100644
--- a/usbdrv/usbdrvasm128.inc
+++ b/usbdrv/usbdrvasm128.inc
@@ -128,6 +128,9 @@ waitForK:
     inc     YL
     sts     usbSofCount, YL
 #endif  /* USB_COUNT_SOF */
+#ifdef USB_SOF_HOOK
+    USB_SOF_HOOK
+#endif
     rjmp    sofError
 
 foundK:
diff --git a/usbdrv/usbdrvasm15.inc b/usbdrv/usbdrvasm15.inc
index d9dd427..689d2a3 100644
--- a/usbdrv/usbdrvasm15.inc
+++ b/usbdrv/usbdrvasm15.inc
@@ -70,6 +70,9 @@ waitForK:			 ;-
     inc     YL
     sts     usbSofCount, YL
 #endif  /* USB_COUNT_SOF */
+#ifdef USB_SOF_HOOK
+    USB_SOF_HOOK
+#endif
     rjmp    sofError
 ;------------------------------------------------------------------------------
 ; {3, 5} after falling D- edge, average delay: 4 cycles [we want 5 for 
diff --git a/usbdrv/usbdrvasm16.inc b/usbdrv/usbdrvasm16.inc
index 3d1ce5d..44b00fa 100644
--- a/usbdrv/usbdrvasm16.inc
+++ b/usbdrv/usbdrvasm16.inc
@@ -64,6 +64,9 @@ waitForK:
     inc     YL
     sts     usbSofCount, YL
 #endif  /* USB_COUNT_SOF */
+#ifdef USB_SOF_HOOK
+    USB_SOF_HOOK
+#endif
     rjmp    sofError
 foundK:                         ;[-12]
 ;{3, 5} after falling D- edge, average delay: 4 cycles [we want 5 for center sampling]
diff --git a/usbdrv/usbdrvasm165.inc b/usbdrv/usbdrvasm165.inc
index 6a9ef7e..b37ac96 100644
--- a/usbdrv/usbdrvasm165.inc
+++ b/usbdrv/usbdrvasm165.inc
@@ -69,6 +69,9 @@ waitForK:
     inc     YL
     sts     usbSofCount, YL
 #endif  /* USB_COUNT_SOF */
+#ifdef USB_SOF_HOOK
+    USB_SOF_HOOK
+#endif
     rjmp    sofError
 foundK:                         ;[-12]
 ;{3, 5} after falling D- edge, average delay: 4 cycles [we want 5 for center sampling]
diff --git a/usbdrv/usbdrvasm20.inc b/usbdrv/usbdrvasm20.inc
index a8dee1c..2d4be52 100644
--- a/usbdrv/usbdrvasm20.inc
+++ b/usbdrv/usbdrvasm20.inc
@@ -86,6 +86,9 @@ waitForK:
     inc     YL
     sts     usbSofCount, YL
 #endif  /* USB_COUNT_SOF */
+#ifdef USB_SOF_HOOK
+    USB_SOF_HOOK
+#endif
     rjmp    sofError
 foundK:                         ;[-16]
 ;{3, 5} after falling D- edge, average delay: 4 cycles