Added 3rd endpoint (#1)HEADmaster

* Added 3rd endpoint

- Added 3rd endpoint check in asmcommon. This adds 2 extra cycles to the USB routine when enabled. With 16MHz clock (most if not all qmk build use that) the routine is still within spec.

- Updated prototype.h file to add additional options.

- Simulatanius changes in QMK to follow soon

* Update usbdrv/usbdrv.c

* Update usbdrv/usbdrv.c

* Update usbdrv/usbdrv.c

* Update usbdrv/usbdrv.c

* Update usbdrv/usbdrvasm.S

Accepted to keep changes minimal

* Update usbdrv/usbdrvasm.S

Accepted to keep changes minimal

* Update usbdrv/usbdrvasm.S

Accepted to keep changes minimal

* Update usbdrv/usbdrvasm.S

Accepted to keep changes minimal

1 files changed, 28 insertions, 1 deletions

diff --git a/usbdrv/usbdrv.c b/usbdrv/usbdrv.c
index 1d80ac6..b0cb565 100644
--- a/usbdrv/usbdrv.c
+++ b/usbdrv/usbdrv.c
@@ -37,6 +37,9 @@ usbTxStatus_t  usbTxStatus1;
 #   if USB_CFG_HAVE_INTRIN_ENDPOINT3
 usbTxStatus_t  usbTxStatus3;
 #   endif
+#   if USB_CFG_HAVE_INTRIN_ENDPOINT4
+usbTxStatus_t  usbTxStatus4;
+#   endif
 #endif
 #if USB_CFG_CHECK_DATA_TOGGLING
 uchar       usbCurrentDataToken;/* when we check data toggling to ignore duplicate packets */
@@ -139,7 +142,7 @@ PROGMEM const char usbDescriptorDevice[] = {    /* USB device descriptor */
 PROGMEM const char usbDescriptorConfiguration[] = {    /* USB configuration descriptor */
     9,          /* sizeof(usbDescriptorConfiguration): length of descriptor in bytes */
     USBDESCR_CONFIG,    /* descriptor type */
-    18 + 7 * USB_CFG_HAVE_INTRIN_ENDPOINT + 7 * USB_CFG_HAVE_INTRIN_ENDPOINT3 +
+    18 + 7 * USB_CFG_HAVE_INTRIN_ENDPOINT + 7 * USB_CFG_HAVE_INTRIN_ENDPOINT3 + 7 * USB_CFG_HAVE_INTRIN_ENDPOINT4 +
                 (USB_CFG_DESCR_PROPS_HID & 0xff), 0,
                 /* total length of data returned (including inlined descriptors) */
     1,          /* number of interfaces in this configuration */
@@ -187,6 +190,14 @@ PROGMEM const char usbDescriptorConfiguration[] = {    /* USB configuration desc
     8, 0,       /* maximum packet size */
     USB_CFG_INTR_POLL_INTERVAL, /* in ms */
 #endif
+#if USB_CFG_HAVE_INTRIN_ENDPOINT4   /* endpoint descriptor for endpoint 4 */
+    7,          /* sizeof(usbDescrEndpoint) */
+    USBDESCR_ENDPOINT,  /* descriptor type = endpoint */
+    (char)(0x80 | USB_CFG_EP4_NUMBER), /* IN endpoint number 4 */
+    0x03,       /* attrib: Interrupt endpoint */
+    8, 0,       /* maximum packet size */
+    USB_CFG_INTR_POLL_INTERVAL, /* in ms */
+#endif
 };
 #endif
 
@@ -199,6 +210,9 @@ static inline void  usbResetDataToggling(void)
 #   if USB_CFG_HAVE_INTRIN_ENDPOINT3
     USB_SET_DATATOKEN3(USB_INITIAL_DATATOKEN);  /* reset data toggling for interrupt endpoint */
 #   endif
+#   if USB_CFG_HAVE_INTRIN_ENDPOINT4
+    USB_SET_DATATOKEN4(USB_INITIAL_DATATOKEN);  /* reset data toggling for interrupt endpoint */
+#   endif
 #endif
 }
 
@@ -209,6 +223,9 @@ static inline void  usbResetStall(void)
 #if USB_CFG_HAVE_INTRIN_ENDPOINT3
         usbTxLen3 = USBPID_NAK;
 #endif
+#if USB_CFG_HAVE_INTRIN_ENDPOINT4
+        usbTxLen4 = USBPID_NAK;
+#endif
 #endif
 }
 
@@ -252,6 +269,13 @@ USB_PUBLIC void usbSetInterrupt3(uchar *data, uchar len)
     usbGenericSetInterrupt(data, len, &usbTxStatus3);
 }
 #endif
+
+#if USB_CFG_HAVE_INTRIN_ENDPOINT4
+USB_PUBLIC void usbSetInterrupt4(uchar *data, uchar len)
+{
+    usbGenericSetInterrupt(data, len, &usbTxStatus4);
+}
+#endif
 #endif /* USB_CFG_SUPPRESS_INTR_CODE */
 
 /* ------------------ utilities for code following below ------------------- */
@@ -628,6 +652,9 @@ USB_PUBLIC void usbInit(void)
 #if USB_CFG_HAVE_INTRIN_ENDPOINT3
     usbTxLen3 = USBPID_NAK;
 #endif
+#if USB_CFG_HAVE_INTRIN_ENDPOINT4
+    usbTxLen4 = USBPID_NAK;
+#endif
 #endif
 }