clang-format changes

1 files changed, 335 insertions, 338 deletions

diff --git a/tmk_core/protocol/vusb/usbdrv/usbdrv.c b/tmk_core/protocol/vusb/usbdrv/usbdrv.c
index 30cdc9dcfc..f69198b1b9 100644
--- a/tmk_core/protocol/vusb/usbdrv/usbdrv.c
+++ b/tmk_core/protocol/vusb/usbdrv/usbdrv.c
@@ -21,36 +21,36 @@ documentation of the entire driver.
 /* ------------------------------------------------------------------------- */
 
 /* raw USB registers / interface to assembler code: */
-uchar usbRxBuf[2*USB_BUFSIZE];  /* raw RX buffer: PID, 8 bytes data, 2 bytes CRC */
-uchar       usbInputBufOffset;  /* offset in usbRxBuf used for low level receiving */
-uchar       usbDeviceAddr;      /* assigned during enumeration, defaults to 0 */
-uchar       usbNewDeviceAddr;   /* device ID which should be set after status phase */
-uchar       usbConfiguration;   /* currently selected configuration. Administered by driver, but not used */
-volatile schar usbRxLen;        /* = 0; number of bytes in usbRxBuf; 0 means free, -1 for flow control */
-uchar       usbCurrentTok;      /* last token received or endpoint number for last OUT token if != 0 */
-uchar       usbRxToken;         /* token for data we received; or endpont number for last OUT */
-volatile uchar usbTxLen = USBPID_NAK;   /* number of bytes to transmit with next IN token or handshake token */
-uchar       usbTxBuf[USB_BUFSIZE];/* data to transmit with next IN, free if usbTxLen contains handshake token */
+uchar          usbRxBuf[2 * USB_BUFSIZE]; /* raw RX buffer: PID, 8 bytes data, 2 bytes CRC */
+uchar          usbInputBufOffset;         /* offset in usbRxBuf used for low level receiving */
+uchar          usbDeviceAddr;             /* assigned during enumeration, defaults to 0 */
+uchar          usbNewDeviceAddr;          /* device ID which should be set after status phase */
+uchar          usbConfiguration;          /* currently selected configuration. Administered by driver, but not used */
+volatile schar usbRxLen;                  /* = 0; number of bytes in usbRxBuf; 0 means free, -1 for flow control */
+uchar          usbCurrentTok;             /* last token received or endpoint number for last OUT token if != 0 */
+uchar          usbRxToken;                /* token for data we received; or endpont number for last OUT */
+volatile uchar usbTxLen = USBPID_NAK;     /* number of bytes to transmit with next IN token or handshake token */
+uchar          usbTxBuf[USB_BUFSIZE];     /* data to transmit with next IN, free if usbTxLen contains handshake token */
 #if USB_COUNT_SOF
-volatile uchar  usbSofCount;    /* incremented by assembler module every SOF */
+volatile uchar usbSofCount; /* incremented by assembler module every SOF */
 #endif
 #if USB_CFG_HAVE_INTRIN_ENDPOINT && !USB_CFG_SUPPRESS_INTR_CODE
-usbTxStatus_t  usbTxStatus1;
-#   if USB_CFG_HAVE_INTRIN_ENDPOINT3
-usbTxStatus_t  usbTxStatus3;
-#   endif
+usbTxStatus_t usbTxStatus1;
+#    if USB_CFG_HAVE_INTRIN_ENDPOINT3
+usbTxStatus_t usbTxStatus3;
+#    endif
 #endif
 #if USB_CFG_CHECK_DATA_TOGGLING
-uchar       usbCurrentDataToken;/* when we check data toggling to ignore duplicate packets */
+uchar usbCurrentDataToken; /* when we check data toggling to ignore duplicate packets */
 #endif
 
 /* USB status registers / not shared with asm code */
-uchar               *usbMsgPtr;     /* data to transmit next -- ROM or RAM address */
-static usbMsgLen_t  usbMsgLen = USB_NO_MSG; /* remaining number of bytes */
-static uchar        usbMsgFlags;    /* flag values see below */
+uchar *            usbMsgPtr;              /* data to transmit next -- ROM or RAM address */
+static usbMsgLen_t usbMsgLen = USB_NO_MSG; /* remaining number of bytes */
+static uchar       usbMsgFlags;            /* flag values see below */
 
-#define USB_FLG_MSGPTR_IS_ROM   (1<<6)
-#define USB_FLG_USE_USER_RW     (1<<7)
+#define USB_FLG_MSGPTR_IS_ROM (1 << 6)
+#define USB_FLG_USE_USER_RW (1 << 7)
 
 /*
 optimizing hints:
@@ -64,196 +64,174 @@ optimizing hints:
 
 #if USB_CFG_DESCR_PROPS_STRINGS == 0
 
-#if USB_CFG_DESCR_PROPS_STRING_0 == 0
-#undef USB_CFG_DESCR_PROPS_STRING_0
-#define USB_CFG_DESCR_PROPS_STRING_0    sizeof(usbDescriptorString0)
-const PROGMEM char usbDescriptorString0[] = { /* language descriptor */
+#    if USB_CFG_DESCR_PROPS_STRING_0 == 0
+#        undef USB_CFG_DESCR_PROPS_STRING_0
+#        define USB_CFG_DESCR_PROPS_STRING_0 sizeof(usbDescriptorString0)
+const PROGMEM char usbDescriptorString0[] = {
+    /* language descriptor */
     4,          /* sizeof(usbDescriptorString0): length of descriptor in bytes */
     3,          /* descriptor type */
     0x09, 0x04, /* language index (0x0409 = US-English) */
 };
-#endif
+#    endif
 
-#if USB_CFG_DESCR_PROPS_STRING_VENDOR == 0 && USB_CFG_VENDOR_NAME_LEN
-#undef USB_CFG_DESCR_PROPS_STRING_VENDOR
-#define USB_CFG_DESCR_PROPS_STRING_VENDOR   sizeof(usbDescriptorStringVendor)
-const PROGMEM int  usbDescriptorStringVendor[] = {
-    USB_STRING_DESCRIPTOR_HEADER(USB_CFG_VENDOR_NAME_LEN),
-    USB_CFG_VENDOR_NAME
-};
-#endif
+#    if USB_CFG_DESCR_PROPS_STRING_VENDOR == 0 && USB_CFG_VENDOR_NAME_LEN
+#        undef USB_CFG_DESCR_PROPS_STRING_VENDOR
+#        define USB_CFG_DESCR_PROPS_STRING_VENDOR sizeof(usbDescriptorStringVendor)
+const PROGMEM int usbDescriptorStringVendor[] = {USB_STRING_DESCRIPTOR_HEADER(USB_CFG_VENDOR_NAME_LEN), USB_CFG_VENDOR_NAME};
+#    endif
 
-#if USB_CFG_DESCR_PROPS_STRING_PRODUCT == 0 && USB_CFG_DEVICE_NAME_LEN
-#undef USB_CFG_DESCR_PROPS_STRING_PRODUCT
-#define USB_CFG_DESCR_PROPS_STRING_PRODUCT   sizeof(usbDescriptorStringDevice)
-const PROGMEM int  usbDescriptorStringDevice[] = {
-    USB_STRING_DESCRIPTOR_HEADER(USB_CFG_DEVICE_NAME_LEN),
-    USB_CFG_DEVICE_NAME
-};
-#endif
+#    if USB_CFG_DESCR_PROPS_STRING_PRODUCT == 0 && USB_CFG_DEVICE_NAME_LEN
+#        undef USB_CFG_DESCR_PROPS_STRING_PRODUCT
+#        define USB_CFG_DESCR_PROPS_STRING_PRODUCT sizeof(usbDescriptorStringDevice)
+const PROGMEM int usbDescriptorStringDevice[] = {USB_STRING_DESCRIPTOR_HEADER(USB_CFG_DEVICE_NAME_LEN), USB_CFG_DEVICE_NAME};
+#    endif
 
-#if USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER == 0 && USB_CFG_SERIAL_NUMBER_LEN
-#undef USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER
-#define USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER    sizeof(usbDescriptorStringSerialNumber)
-const PROGMEM int usbDescriptorStringSerialNumber[] = {
-    USB_STRING_DESCRIPTOR_HEADER(USB_CFG_SERIAL_NUMBER_LEN),
-    USB_CFG_SERIAL_NUMBER
-};
-#endif
+#    if USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER == 0 && USB_CFG_SERIAL_NUMBER_LEN
+#        undef USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER
+#        define USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER sizeof(usbDescriptorStringSerialNumber)
+const PROGMEM int usbDescriptorStringSerialNumber[] = {USB_STRING_DESCRIPTOR_HEADER(USB_CFG_SERIAL_NUMBER_LEN), USB_CFG_SERIAL_NUMBER};
+#    endif
 
-#endif  /* USB_CFG_DESCR_PROPS_STRINGS == 0 */
+#endif /* USB_CFG_DESCR_PROPS_STRINGS == 0 */
 
 /* --------------------------- Device Descriptor --------------------------- */
 
 #if USB_CFG_DESCR_PROPS_DEVICE == 0
-#undef USB_CFG_DESCR_PROPS_DEVICE
-#define USB_CFG_DESCR_PROPS_DEVICE  sizeof(usbDescriptorDevice)
-const PROGMEM char usbDescriptorDevice[] = {    /* USB device descriptor */
-    18,         /* sizeof(usbDescriptorDevice): length of descriptor in bytes */
-    USBDESCR_DEVICE,        /* descriptor type */
-    0x10, 0x01,             /* USB version supported */
-    USB_CFG_DEVICE_CLASS,
-    USB_CFG_DEVICE_SUBCLASS,
-    0,                      /* protocol */
-    8,                      /* max packet size */
+#    undef USB_CFG_DESCR_PROPS_DEVICE
+#    define USB_CFG_DESCR_PROPS_DEVICE sizeof(usbDescriptorDevice)
+const PROGMEM char usbDescriptorDevice[] = {
+    /* USB device descriptor */
+    18,                                               /* sizeof(usbDescriptorDevice): length of descriptor in bytes */
+    USBDESCR_DEVICE,                                  /* descriptor type */
+    0x10, 0x01,                                       /* USB version supported */
+    USB_CFG_DEVICE_CLASS, USB_CFG_DEVICE_SUBCLASS, 0, /* protocol */
+    8,                                                /* max packet size */
     /* the following two casts affect the first byte of the constant only, but
      * that's sufficient to avoid a warning with the default values.
      */
-    (char)USB_CFG_VENDOR_ID,/* 2 bytes */
-    (char)USB_CFG_DEVICE_ID,/* 2 bytes */
-    USB_CFG_DEVICE_VERSION, /* 2 bytes */
-    USB_CFG_DESCR_PROPS_STRING_VENDOR != 0 ? 1 : 0,         /* manufacturer string index */
-    USB_CFG_DESCR_PROPS_STRING_PRODUCT != 0 ? 2 : 0,        /* product string index */
-    USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER != 0 ? 3 : 0,  /* serial number string index */
-    1,          /* number of configurations */
+    (char)USB_CFG_VENDOR_ID,                               /* 2 bytes */
+    (char)USB_CFG_DEVICE_ID,                               /* 2 bytes */
+    USB_CFG_DEVICE_VERSION,                                /* 2 bytes */
+    USB_CFG_DESCR_PROPS_STRING_VENDOR != 0 ? 1 : 0,        /* manufacturer string index */
+    USB_CFG_DESCR_PROPS_STRING_PRODUCT != 0 ? 2 : 0,       /* product string index */
+    USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER != 0 ? 3 : 0, /* serial number string index */
+    1,                                                     /* number of configurations */
 };
 #endif
 
 /* ----------------------- Configuration Descriptor ------------------------ */
 
 #if USB_CFG_DESCR_PROPS_HID_REPORT != 0 && USB_CFG_DESCR_PROPS_HID == 0
-#undef USB_CFG_DESCR_PROPS_HID
-#define USB_CFG_DESCR_PROPS_HID     9   /* length of HID descriptor in config descriptor below */
+#    undef USB_CFG_DESCR_PROPS_HID
+#    define USB_CFG_DESCR_PROPS_HID 9 /* length of HID descriptor in config descriptor below */
 #endif
 
 #if USB_CFG_DESCR_PROPS_CONFIGURATION == 0
-#undef USB_CFG_DESCR_PROPS_CONFIGURATION
-#define USB_CFG_DESCR_PROPS_CONFIGURATION   sizeof(usbDescriptorConfiguration)
-PROGMEM 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 +
-                (USB_CFG_DESCR_PROPS_HID & 0xff), 0,
-                /* total length of data returned (including inlined descriptors) */
-    1,          /* number of interfaces in this configuration */
-    1,          /* index of this configuration */
-    0,          /* configuration name string index */
-#if USB_CFG_IS_SELF_POWERED
-    (1 << 7) | USBATTR_SELFPOWER,       /* attributes */
-#else
-    (1 << 7),                           /* attributes */
-#endif
-    USB_CFG_MAX_BUS_POWER/2,            /* max USB current in 2mA units */
-/* interface descriptor follows inline: */
-    9,          /* sizeof(usbDescrInterface): length of descriptor in bytes */
-    USBDESCR_INTERFACE, /* descriptor type */
-    0,          /* index of this interface */
-    0,          /* alternate setting for this interface */
-    USB_CFG_HAVE_INTRIN_ENDPOINT + USB_CFG_HAVE_INTRIN_ENDPOINT3, /* endpoints excl 0: number of endpoint descriptors to follow */
-    USB_CFG_INTERFACE_CLASS,
-    USB_CFG_INTERFACE_SUBCLASS,
-    USB_CFG_INTERFACE_PROTOCOL,
-    0,          /* string index for interface */
-#if (USB_CFG_DESCR_PROPS_HID & 0xff)    /* HID descriptor */
-    9,          /* sizeof(usbDescrHID): length of descriptor in bytes */
-    USBDESCR_HID,   /* descriptor type: HID */
-    0x01, 0x01, /* BCD representation of HID version */
-    0x00,       /* target country code */
-    0x01,       /* number of HID Report (or other HID class) Descriptor infos to follow */
-    0x22,       /* descriptor type: report */
-    USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH, 0,  /* total length of report descriptor */
-#endif
-#if USB_CFG_HAVE_INTRIN_ENDPOINT    /* endpoint descriptor for endpoint 1 */
-    7,          /* sizeof(usbDescrEndpoint) */
-    USBDESCR_ENDPOINT,  /* descriptor type = endpoint */
-    (char)0x81, /* IN endpoint number 1 */
-    0x03,       /* attrib: Interrupt endpoint */
-    8, 0,       /* maximum packet size */
-    USB_CFG_INTR_POLL_INTERVAL, /* in ms */
-#endif
-#if USB_CFG_HAVE_INTRIN_ENDPOINT3   /* endpoint descriptor for endpoint 3 */
-    7,          /* sizeof(usbDescrEndpoint) */
-    USBDESCR_ENDPOINT,  /* descriptor type = endpoint */
+#    undef USB_CFG_DESCR_PROPS_CONFIGURATION
+#    define USB_CFG_DESCR_PROPS_CONFIGURATION sizeof(usbDescriptorConfiguration)
+PROGMEM 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 + (USB_CFG_DESCR_PROPS_HID & 0xff), 0,
+    /* total length of data returned (including inlined descriptors) */
+    1, /* number of interfaces in this configuration */
+    1, /* index of this configuration */
+    0, /* configuration name string index */
+#    if USB_CFG_IS_SELF_POWERED
+    (1 << 7) | USBATTR_SELFPOWER, /* attributes */
+#    else
+    (1 << 7), /* attributes */
+#    endif
+    USB_CFG_MAX_BUS_POWER / 2,                                                          /* max USB current in 2mA units */
+                                                                                        /* interface descriptor follows inline: */
+    9,                                                                                  /* sizeof(usbDescrInterface): length of descriptor in bytes */
+    USBDESCR_INTERFACE,                                                                 /* descriptor type */
+    0,                                                                                  /* index of this interface */
+    0,                                                                                  /* alternate setting for this interface */
+    USB_CFG_HAVE_INTRIN_ENDPOINT + USB_CFG_HAVE_INTRIN_ENDPOINT3,                       /* endpoints excl 0: number of endpoint descriptors to follow */
+    USB_CFG_INTERFACE_CLASS, USB_CFG_INTERFACE_SUBCLASS, USB_CFG_INTERFACE_PROTOCOL, 0, /* string index for interface */
+#    if (USB_CFG_DESCR_PROPS_HID & 0xff)                                                /* HID descriptor */
+    9,                                                                                  /* sizeof(usbDescrHID): length of descriptor in bytes */
+    USBDESCR_HID,                                                                       /* descriptor type: HID */
+    0x01, 0x01,                                                                         /* BCD representation of HID version */
+    0x00,                                                                               /* target country code */
+    0x01,                                                                               /* number of HID Report (or other HID class) Descriptor infos to follow */
+    0x22,                                                                               /* descriptor type: report */
+    USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH, 0,                                            /* total length of report descriptor */
+#    endif
+#    if USB_CFG_HAVE_INTRIN_ENDPOINT /* endpoint descriptor for endpoint 1 */
+    7,                               /* sizeof(usbDescrEndpoint) */
+    USBDESCR_ENDPOINT,               /* descriptor type = endpoint */
+    (char)0x81,                      /* IN endpoint number 1 */
+    0x03,                            /* attrib: Interrupt endpoint */
+    8, 0,                            /* maximum packet size */
+    USB_CFG_INTR_POLL_INTERVAL,      /* in ms */
+#    endif
+#    if USB_CFG_HAVE_INTRIN_ENDPOINT3  /* endpoint descriptor for endpoint 3 */
+    7,                                 /* sizeof(usbDescrEndpoint) */
+    USBDESCR_ENDPOINT,                 /* descriptor type = endpoint */
     (char)(0x80 | USB_CFG_EP3_NUMBER), /* IN endpoint number 3 */
-    0x03,       /* attrib: Interrupt endpoint */
-    8, 0,       /* maximum packet size */
-    USB_CFG_INTR_POLL_INTERVAL, /* in ms */
-#endif
+    0x03,                              /* attrib: Interrupt endpoint */
+    8, 0,                              /* maximum packet size */
+    USB_CFG_INTR_POLL_INTERVAL,        /* in ms */
+#    endif
 };
 #endif
 
 /* ------------------------------------------------------------------------- */
 
-static inline void  usbResetDataToggling(void)
-{
+static inline void usbResetDataToggling(void) {
 #if USB_CFG_HAVE_INTRIN_ENDPOINT && !USB_CFG_SUPPRESS_INTR_CODE
-    USB_SET_DATATOKEN1(USB_INITIAL_DATATOKEN);  /* reset data toggling for interrupt endpoint */
-#   if USB_CFG_HAVE_INTRIN_ENDPOINT3
-    USB_SET_DATATOKEN3(USB_INITIAL_DATATOKEN);  /* reset data toggling for interrupt endpoint */
-#   endif
+    USB_SET_DATATOKEN1(USB_INITIAL_DATATOKEN); /* reset data toggling for interrupt endpoint */
+#    if USB_CFG_HAVE_INTRIN_ENDPOINT3
+    USB_SET_DATATOKEN3(USB_INITIAL_DATATOKEN); /* reset data toggling for interrupt endpoint */
+#    endif
 #endif
 }
 
-static inline void  usbResetStall(void)
-{
+static inline void usbResetStall(void) {
 #if USB_CFG_IMPLEMENT_HALT && USB_CFG_HAVE_INTRIN_ENDPOINT
-        usbTxLen1 = USBPID_NAK;
-#if USB_CFG_HAVE_INTRIN_ENDPOINT3
-        usbTxLen3 = USBPID_NAK;
-#endif
+    usbTxLen1 = USBPID_NAK;
+#    if USB_CFG_HAVE_INTRIN_ENDPOINT3
+    usbTxLen3 = USBPID_NAK;
+#    endif
 #endif
 }
 
 /* ------------------------------------------------------------------------- */
 
 #if !USB_CFG_SUPPRESS_INTR_CODE
-#if USB_CFG_HAVE_INTRIN_ENDPOINT
-static void usbGenericSetInterrupt(uchar *data, uchar len, usbTxStatus_t *txStatus)
-{
-uchar   *p;
-char    i;
-
-#if USB_CFG_IMPLEMENT_HALT
-    if(usbTxLen1 == USBPID_STALL)
-        return;
-#endif
-    if(txStatus->len & 0x10){   /* packet buffer was empty */
+#    if USB_CFG_HAVE_INTRIN_ENDPOINT
+static void usbGenericSetInterrupt(uchar *data, uchar len, usbTxStatus_t *txStatus) {
+    uchar *p;
+    char   i;
+
+#        if USB_CFG_IMPLEMENT_HALT
+    if (usbTxLen1 == USBPID_STALL) return;
+#        endif
+    if (txStatus->len & 0x10) {                             /* packet buffer was empty */
         txStatus->buffer[0] ^= USBPID_DATA0 ^ USBPID_DATA1; /* toggle token */
-    }else{
+    } else {
         txStatus->len = USBPID_NAK; /* avoid sending outdated (overwritten) interrupt data */
     }
     p = txStatus->buffer + 1;
     i = len;
-    do{                         /* if len == 0, we still copy 1 byte, but that's no problem */
+    do { /* if len == 0, we still copy 1 byte, but that's no problem */
         *p++ = *data++;
-    }while(--i > 0);            /* loop control at the end is 2 bytes shorter than at beginning */
+    } while (--i > 0); /* loop control at the end is 2 bytes shorter than at beginning */
     usbCrc16Append(&txStatus->buffer[1], len);
-    txStatus->len = len + 4;    /* len must be given including sync byte */
+    txStatus->len = len + 4; /* len must be given including sync byte */
     DBG2(0x21 + (((int)txStatus >> 3) & 3), txStatus->buffer, len + 3);
 }
 
-USB_PUBLIC void usbSetInterrupt(uchar *data, uchar len)
-{
-    usbGenericSetInterrupt(data, len, &usbTxStatus1);
-}
-#endif
+USB_PUBLIC void usbSetInterrupt(uchar *data, uchar len) { usbGenericSetInterrupt(data, len, &usbTxStatus1); }
+#    endif
 
-#if USB_CFG_HAVE_INTRIN_ENDPOINT3
-USB_PUBLIC void usbSetInterrupt3(uchar *data, uchar len)
-{
-    usbGenericSetInterrupt(data, len, &usbTxStatus3);
-}
-#endif
+#    if USB_CFG_HAVE_INTRIN_ENDPOINT3
+USB_PUBLIC void usbSetInterrupt3(uchar *data, uchar len) { usbGenericSetInterrupt(data, len, &usbTxStatus3); }
+#    endif
 #endif /* USB_CFG_SUPPRESS_INTR_CODE */
 
 /* ------------------ utilities for code following below ------------------- */
@@ -264,26 +242,58 @@ USB_PUBLIC void usbSetInterrupt3(uchar *data, uchar len)
  * cases.
  */
 #if USB_CFG_USE_SWITCH_STATEMENT
-#   define SWITCH_START(cmd)       switch(cmd){{
-#   define SWITCH_CASE(value)      }break; case (value):{
-#   define SWITCH_CASE2(v1,v2)     }break; case (v1): case(v2):{
-#   define SWITCH_CASE3(v1,v2,v3)  }break; case (v1): case(v2): case(v3):{
-#   define SWITCH_DEFAULT          }break; default:{
-#   define SWITCH_END              }}
+#    define SWITCH_START(cmd) \
+        switch (cmd) {        \
+            {
+#    define SWITCH_CASE(value) \
+        }                      \
+        break;                 \
+        case (value): {
+#    define SWITCH_CASE2(v1, v2) \
+        }                        \
+        break;                   \
+        case (v1):               \
+        case (v2): {
+#    define SWITCH_CASE3(v1, v2, v3) \
+        }                            \
+        break;                       \
+        case (v1):                   \
+        case (v2):                   \
+        case (v3): {
+#    define SWITCH_DEFAULT \
+        }                  \
+        break;             \
+        default: {
+#    define SWITCH_END \
+        }              \
+        }
 #else
-#   define SWITCH_START(cmd)       {uchar _cmd = cmd; if(0){
-#   define SWITCH_CASE(value)      }else if(_cmd == (value)){
-#   define SWITCH_CASE2(v1,v2)     }else if(_cmd == (v1) || _cmd == (v2)){
-#   define SWITCH_CASE3(v1,v2,v3)  }else if(_cmd == (v1) || _cmd == (v2) || (_cmd == v3)){
-#   define SWITCH_DEFAULT          }else{
-#   define SWITCH_END              }}
+#    define SWITCH_START(cmd) \
+        {                     \
+            uchar _cmd = cmd; \
+            if (0) {
+#    define SWITCH_CASE(value) \
+        }                      \
+        else if (_cmd == (value)) {
+#    define SWITCH_CASE2(v1, v2) \
+        }                        \
+        else if (_cmd == (v1) || _cmd == (v2)) {
+#    define SWITCH_CASE3(v1, v2, v3) \
+        }                            \
+        else if (_cmd == (v1) || _cmd == (v2) || (_cmd == v3)) {
+#    define SWITCH_DEFAULT \
+        }                  \
+        else {
+#    define SWITCH_END \
+        }              \
+        }
 #endif
 
 #ifndef USB_RX_USER_HOOK
-#define USB_RX_USER_HOOK(data, len)
+#    define USB_RX_USER_HOOK(data, len)
 #endif
 #ifndef USB_SET_ADDRESS_HOOK
-#define USB_SET_ADDRESS_HOOK()
+#    define USB_SET_ADDRESS_HOOK()
 #endif
 
 /* ------------------------------------------------------------------------- */
@@ -293,62 +303,59 @@ USB_PUBLIC void usbSetInterrupt3(uchar *data, uchar len)
  * This may cause problems with undefined symbols if compiled without
  * optimizing!
  */
-#define GET_DESCRIPTOR(cfgProp, staticName)         \
-    if(cfgProp){                                    \
-        if((cfgProp) & USB_PROP_IS_RAM)             \
-            flags = 0;                              \
-        if((cfgProp) & USB_PROP_IS_DYNAMIC){        \
-            len = usbFunctionDescriptor(rq);        \
-        }else{                                      \
-            len = USB_PROP_LENGTH(cfgProp);         \
-            usbMsgPtr = (uchar *)(staticName);      \
-        }                                           \
+#define GET_DESCRIPTOR(cfgProp, staticName)       \
+    if (cfgProp) {                                \
+        if ((cfgProp)&USB_PROP_IS_RAM) flags = 0; \
+        if ((cfgProp)&USB_PROP_IS_DYNAMIC) {      \
+            len = usbFunctionDescriptor(rq);      \
+        } else {                                  \
+            len       = USB_PROP_LENGTH(cfgProp); \
+            usbMsgPtr = (uchar *)(staticName);    \
+        }                                         \
     }
 
 /* usbDriverDescriptor() is similar to usbFunctionDescriptor(), but used
  * internally for all types of descriptors.
  */
-static inline usbMsgLen_t usbDriverDescriptor(usbRequest_t *rq)
-{
-usbMsgLen_t len = 0;
-uchar       flags = USB_FLG_MSGPTR_IS_ROM;
+static inline usbMsgLen_t usbDriverDescriptor(usbRequest_t *rq) {
+    usbMsgLen_t len   = 0;
+    uchar       flags = USB_FLG_MSGPTR_IS_ROM;
 
     SWITCH_START(rq->wValue.bytes[1])
-    SWITCH_CASE(USBDESCR_DEVICE)    /* 1 */
-        GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_DEVICE, usbDescriptorDevice)
-    SWITCH_CASE(USBDESCR_CONFIG)    /* 2 */
-        GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_CONFIGURATION, usbDescriptorConfiguration)
-    SWITCH_CASE(USBDESCR_STRING)    /* 3 */
+    SWITCH_CASE(USBDESCR_DEVICE) /* 1 */
+    GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_DEVICE, usbDescriptorDevice)
+    SWITCH_CASE(USBDESCR_CONFIG) /* 2 */
+    GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_CONFIGURATION, usbDescriptorConfiguration)
+    SWITCH_CASE(USBDESCR_STRING) /* 3 */
 #if USB_CFG_DESCR_PROPS_STRINGS & USB_PROP_IS_DYNAMIC
-        if(USB_CFG_DESCR_PROPS_STRINGS & USB_PROP_IS_RAM)
-            flags = 0;
+    if (USB_CFG_DESCR_PROPS_STRINGS & USB_PROP_IS_RAM) flags = 0;
+    len = usbFunctionDescriptor(rq);
+#else                              /* USB_CFG_DESCR_PROPS_STRINGS & USB_PROP_IS_DYNAMIC */
+    SWITCH_START(rq->wValue.bytes[0])
+    SWITCH_CASE(0)
+    GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_STRING_0, usbDescriptorString0)
+    SWITCH_CASE(1)
+    GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_STRING_VENDOR, usbDescriptorStringVendor)
+    SWITCH_CASE(2)
+    GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_STRING_PRODUCT, usbDescriptorStringDevice)
+    SWITCH_CASE(3)
+    GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER, usbDescriptorStringSerialNumber)
+    SWITCH_DEFAULT
+    if (USB_CFG_DESCR_PROPS_UNKNOWN & USB_PROP_IS_DYNAMIC) {
         len = usbFunctionDescriptor(rq);
-#else   /* USB_CFG_DESCR_PROPS_STRINGS & USB_PROP_IS_DYNAMIC */
-        SWITCH_START(rq->wValue.bytes[0])
-        SWITCH_CASE(0)
-            GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_STRING_0, usbDescriptorString0)
-        SWITCH_CASE(1)
-            GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_STRING_VENDOR, usbDescriptorStringVendor)
-        SWITCH_CASE(2)
-            GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_STRING_PRODUCT, usbDescriptorStringDevice)
-        SWITCH_CASE(3)
-            GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER, usbDescriptorStringSerialNumber)
-        SWITCH_DEFAULT
-            if(USB_CFG_DESCR_PROPS_UNKNOWN & USB_PROP_IS_DYNAMIC){
-                len = usbFunctionDescriptor(rq);
-            }
-        SWITCH_END
-#endif  /* USB_CFG_DESCR_PROPS_STRINGS & USB_PROP_IS_DYNAMIC */
-#if USB_CFG_DESCR_PROPS_HID_REPORT  /* only support HID descriptors if enabled */
-    SWITCH_CASE(USBDESCR_HID)       /* 0x21 */
-        GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_HID, usbDescriptorConfiguration + 18)
-    SWITCH_CASE(USBDESCR_HID_REPORT)/* 0x22 */
-        GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_HID_REPORT, usbDescriptorHidReport)
+    }
+    SWITCH_END
+#endif                             /* USB_CFG_DESCR_PROPS_STRINGS & USB_PROP_IS_DYNAMIC */
+#if USB_CFG_DESCR_PROPS_HID_REPORT /* only support HID descriptors if enabled */
+    SWITCH_CASE(USBDESCR_HID)      /* 0x21 */
+    GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_HID, usbDescriptorConfiguration + 18)
+    SWITCH_CASE(USBDESCR_HID_REPORT) /* 0x22 */
+    GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_HID_REPORT, usbDescriptorHidReport)
 #endif
     SWITCH_DEFAULT
-        if(USB_CFG_DESCR_PROPS_UNKNOWN & USB_PROP_IS_DYNAMIC){
-            len = usbFunctionDescriptor(rq);
-        }
+    if (USB_CFG_DESCR_PROPS_UNKNOWN & USB_PROP_IS_DYNAMIC) {
+        len = usbFunctionDescriptor(rq);
+    }
     SWITCH_END
     usbMsgFlags = flags;
     return len;
@@ -359,56 +366,53 @@ uchar       flags = USB_FLG_MSGPTR_IS_ROM;
 /* usbDriverSetup() is similar to usbFunctionSetup(), but it's used for
  * standard requests instead of class and custom requests.
  */
-static inline usbMsgLen_t usbDriverSetup(usbRequest_t *rq)
-{
-uchar   len  = 0, *dataPtr = usbTxBuf + 9;  /* there are 2 bytes free space at the end of the buffer */
-uchar   value = rq->wValue.bytes[0];
+static inline usbMsgLen_t usbDriverSetup(usbRequest_t *rq) {
+    uchar len = 0, *dataPtr = usbTxBuf + 9; /* there are 2 bytes free space at the end of the buffer */
+    uchar value = rq->wValue.bytes[0];
 #if USB_CFG_IMPLEMENT_HALT
-uchar   index = rq->wIndex.bytes[0];
+    uchar index = rq->wIndex.bytes[0];
 #endif
 
     dataPtr[0] = 0; /* default reply common to USBRQ_GET_STATUS and USBRQ_GET_INTERFACE */
     SWITCH_START(rq->bRequest)
-    SWITCH_CASE(USBRQ_GET_STATUS)           /* 0 */
-        uchar recipient = rq->bmRequestType & USBRQ_RCPT_MASK;  /* assign arith ops to variables to enforce byte size */
-        if(USB_CFG_IS_SELF_POWERED && recipient == USBRQ_RCPT_DEVICE)
-            dataPtr[0] =  USB_CFG_IS_SELF_POWERED;
+    SWITCH_CASE(USBRQ_GET_STATUS)                          /* 0 */
+    uchar recipient = rq->bmRequestType & USBRQ_RCPT_MASK; /* assign arith ops to variables to enforce byte size */
+    if (USB_CFG_IS_SELF_POWERED && recipient == USBRQ_RCPT_DEVICE) dataPtr[0] = USB_CFG_IS_SELF_POWERED;
 #if USB_CFG_IMPLEMENT_HALT
-        if(recipient == USBRQ_RCPT_ENDPOINT && index == 0x81)   /* request status for endpoint 1 */
-            dataPtr[0] = usbTxLen1 == USBPID_STALL;
+    if (recipient == USBRQ_RCPT_ENDPOINT && index == 0x81) /* request status for endpoint 1 */
+        dataPtr[0] = usbTxLen1 == USBPID_STALL;
 #endif
-        dataPtr[1] = 0;
-        len = 2;
+    dataPtr[1] = 0;
+    len        = 2;
 #if USB_CFG_IMPLEMENT_HALT
-    SWITCH_CASE2(USBRQ_CLEAR_FEATURE, USBRQ_SET_FEATURE)    /* 1, 3 */
-        if(value == 0 && index == 0x81){    /* feature 0 == HALT for endpoint == 1 */
-            usbTxLen1 = rq->bRequest == USBRQ_CLEAR_FEATURE ? USBPID_NAK : USBPID_STALL;
-            usbResetDataToggling();
-        }
+    SWITCH_CASE2(USBRQ_CLEAR_FEATURE, USBRQ_SET_FEATURE) /* 1, 3 */
+    if (value == 0 && index == 0x81) {                   /* feature 0 == HALT for endpoint == 1 */
+        usbTxLen1 = rq->bRequest == USBRQ_CLEAR_FEATURE ? USBPID_NAK : USBPID_STALL;
+        usbResetDataToggling();
+    }
 #endif
-    SWITCH_CASE(USBRQ_SET_ADDRESS)          /* 5 */
-        usbNewDeviceAddr = value;
-        USB_SET_ADDRESS_HOOK();
-    SWITCH_CASE(USBRQ_GET_DESCRIPTOR)       /* 6 */
-        len = usbDriverDescriptor(rq);
-        goto skipMsgPtrAssignment;
-    SWITCH_CASE(USBRQ_GET_CONFIGURATION)    /* 8 */
-        dataPtr = &usbConfiguration;  /* send current configuration value */
-        len = 1;
-    SWITCH_CASE(USBRQ_SET_CONFIGURATION)    /* 9 */
-        usbConfiguration = value;
-        usbResetStall();
-    SWITCH_CASE(USBRQ_GET_INTERFACE)        /* 10 */
-        len = 1;
+    SWITCH_CASE(USBRQ_SET_ADDRESS) /* 5 */
+    usbNewDeviceAddr = value;
+    USB_SET_ADDRESS_HOOK();
+    SWITCH_CASE(USBRQ_GET_DESCRIPTOR) /* 6 */
+    len = usbDriverDescriptor(rq);
+    goto skipMsgPtrAssignment;
+    SWITCH_CASE(USBRQ_GET_CONFIGURATION) /* 8 */
+    dataPtr = &usbConfiguration;         /* send current configuration value */
+    len     = 1;
+    SWITCH_CASE(USBRQ_SET_CONFIGURATION) /* 9 */
+    usbConfiguration = value;
+    usbResetStall();
+    SWITCH_CASE(USBRQ_GET_INTERFACE) /* 10 */
+    len = 1;
 #if USB_CFG_HAVE_INTRIN_ENDPOINT && !USB_CFG_SUPPRESS_INTR_CODE
-    SWITCH_CASE(USBRQ_SET_INTERFACE)        /* 11 */
-        usbResetDataToggling();
-        usbResetStall();
+    SWITCH_CASE(USBRQ_SET_INTERFACE) /* 11 */
+    usbResetDataToggling();
+    usbResetStall();
 #endif
-    SWITCH_DEFAULT                          /* 7=SET_DESCRIPTOR, 12=SYNC_FRAME */
+    SWITCH_DEFAULT /* 7=SET_DESCRIPTOR, 12=SYNC_FRAME */
         /* Should we add an optional hook here? */
-    SWITCH_END
-    usbMsgPtr = dataPtr;
+        SWITCH_END usbMsgPtr = dataPtr;
 skipMsgPtrAssignment:
     return len;
 }
@@ -419,65 +423,64 @@ skipMsgPtrAssignment:
  * routine. It distinguishes between SETUP and DATA packets and processes
  * them accordingly.
  */
-static inline void usbProcessRx(uchar *data, uchar len)
-{
-usbRequest_t    *rq = (void *)data;
-
-/* usbRxToken can be:
- * 0x2d 00101101 (USBPID_SETUP for setup data)
- * 0xe1 11100001 (USBPID_OUT: data phase of setup transfer)
- * 0...0x0f for OUT on endpoint X
- */
+static inline void usbProcessRx(uchar *data, uchar len) {
+    usbRequest_t *rq = (void *)data;
+
+    /* usbRxToken can be:
+     * 0x2d 00101101 (USBPID_SETUP for setup data)
+     * 0xe1 11100001 (USBPID_OUT: data phase of setup transfer)
+     * 0...0x0f for OUT on endpoint X
+     */
     DBG2(0x10 + (usbRxToken & 0xf), data, len + 2); /* SETUP=1d, SETUP-DATA=11, OUTx=1x */
     USB_RX_USER_HOOK(data, len)
 #if USB_CFG_IMPLEMENT_FN_WRITEOUT
-    if(usbRxToken < 0x10){  /* OUT to endpoint != 0: endpoint number in usbRxToken */
+    if (usbRxToken < 0x10) { /* OUT to endpoint != 0: endpoint number in usbRxToken */
         usbFunctionWriteOut(data, len);
         return;
     }
 #endif
-    if(usbRxToken == (uchar)USBPID_SETUP){
-        if(len != 8)    /* Setup size must be always 8 bytes. Ignore otherwise. */
+    if (usbRxToken == (uchar)USBPID_SETUP) {
+        if (len != 8) /* Setup size must be always 8 bytes. Ignore otherwise. */
             return;
         usbMsgLen_t replyLen;
-        usbTxBuf[0] = USBPID_DATA0;         /* initialize data toggling */
-        usbTxLen = USBPID_NAK;              /* abort pending transmit */
+        usbTxBuf[0] = USBPID_DATA0; /* initialize data toggling */
+        usbTxLen    = USBPID_NAK;   /* abort pending transmit */
         usbMsgFlags = 0;
-        uchar type = rq->bmRequestType & USBRQ_TYPE_MASK;
-        if(type != USBRQ_TYPE_STANDARD){    /* standard requests are handled by driver */
+        uchar type  = rq->bmRequestType & USBRQ_TYPE_MASK;
+        if (type != USBRQ_TYPE_STANDARD) { /* standard requests are handled by driver */
             replyLen = usbFunctionSetup(data);
-        }else{
+        } else {
             replyLen = usbDriverSetup(rq);
         }
 #if USB_CFG_IMPLEMENT_FN_READ || USB_CFG_IMPLEMENT_FN_WRITE
-        if(replyLen == USB_NO_MSG){         /* use user-supplied read/write function */
+        if (replyLen == USB_NO_MSG) { /* use user-supplied read/write function */
             /* do some conditioning on replyLen, but on IN transfers only */
-            if((rq->bmRequestType & USBRQ_DIR_MASK) != USBRQ_DIR_HOST_TO_DEVICE){
-                if(sizeof(replyLen) < sizeof(rq->wLength.word)){ /* help compiler with optimizing */
+            if ((rq->bmRequestType & USBRQ_DIR_MASK) != USBRQ_DIR_HOST_TO_DEVICE) {
+                if (sizeof(replyLen) < sizeof(rq->wLength.word)) { /* help compiler with optimizing */
                     replyLen = rq->wLength.bytes[0];
-                }else{
+                } else {
                     replyLen = rq->wLength.word;
                 }
             }
             usbMsgFlags = USB_FLG_USE_USER_RW;
-        }else   /* The 'else' prevents that we limit a replyLen of USB_NO_MSG to the maximum transfer len. */
+        } else /* The 'else' prevents that we limit a replyLen of USB_NO_MSG to the maximum transfer len. */
 #endif
-        if(sizeof(replyLen) < sizeof(rq->wLength.word)){ /* help compiler with optimizing */
-            if(!rq->wLength.bytes[1] && replyLen > rq->wLength.bytes[0])    /* limit length to max */
+            if (sizeof(replyLen) < sizeof(rq->wLength.word)) {            /* help compiler with optimizing */
+            if (!rq->wLength.bytes[1] && replyLen > rq->wLength.bytes[0]) /* limit length to max */
                 replyLen = rq->wLength.bytes[0];
-        }else{
-            if(replyLen > rq->wLength.word)     /* limit length to max */
+        } else {
+            if (replyLen > rq->wLength.word) /* limit length to max */
                 replyLen = rq->wLength.word;
         }
         usbMsgLen = replyLen;
-    }else{  /* usbRxToken must be USBPID_OUT, which means data phase of setup (control-out) */
+    } else { /* usbRxToken must be USBPID_OUT, which means data phase of setup (control-out) */
 #if USB_CFG_IMPLEMENT_FN_WRITE
-        if(usbMsgFlags & USB_FLG_USE_USER_RW){
+        if (usbMsgFlags & USB_FLG_USE_USER_RW) {
             uchar rval = usbFunctionWrite(data, len);
-            if(rval == 0xff){   /* an error occurred */
+            if (rval == 0xff) { /* an error occurred */
                 usbTxLen = USBPID_STALL;
-            }else if(rval != 0){    /* This was the final package */
-                usbMsgLen = 0;  /* answer with a zero-sized data packet */
+            } else if (rval != 0) { /* This was the final package */
+                usbMsgLen = 0;      /* answer with a zero-sized data packet */
             }
         }
 #endif
@@ -489,26 +492,25 @@ usbRequest_t    *rq = (void *)data;
 /* This function is similar to usbFunctionRead(), but it's also called for
  * data handled automatically by the driver (e.g. descriptor reads).
  */
-static uchar usbDeviceRead(uchar *data, uchar len)
-{
-    if(len > 0){    /* don't bother app with 0 sized reads */
+static uchar usbDeviceRead(uchar *data, uchar len) {
+    if (len > 0) { /* don't bother app with 0 sized reads */
 #if USB_CFG_IMPLEMENT_FN_READ
-        if(usbMsgFlags & USB_FLG_USE_USER_RW){
+        if (usbMsgFlags & USB_FLG_USE_USER_RW) {
             len = usbFunctionRead(data, len);
-        }else
+        } else
 #endif
         {
             uchar i = len, *r = usbMsgPtr;
-            if(usbMsgFlags & USB_FLG_MSGPTR_IS_ROM){    /* ROM data */
-                do{
-                    uchar c = USB_READ_FLASH(r);    /* assign to char size variable to enforce byte ops */
+            if (usbMsgFlags & USB_FLG_MSGPTR_IS_ROM) { /* ROM data */
+                do {
+                    uchar c = USB_READ_FLASH(r); /* assign to char size variable to enforce byte ops */
                     *data++ = c;
                     r++;
-                }while(--i);
-            }else{  /* RAM data */
-                do{
+                } while (--i);
+            } else { /* RAM data */
+                do {
                     *data++ = *r++;
-                }while(--i);
+                } while (--i);
             }
             usbMsgPtr = r;
         }
@@ -521,39 +523,36 @@ static uchar usbDeviceRead(uchar *data, uchar len)
 /* usbBuildTxBlock() is called when we have data to transmit and the
  * interrupt routine's transmit buffer is empty.
  */
-static inline void usbBuildTxBlock(void)
-{
-usbMsgLen_t wantLen;
-uchar       len;
+static inline void usbBuildTxBlock(void) {
+    usbMsgLen_t wantLen;
+    uchar       len;
 
     wantLen = usbMsgLen;
-    if(wantLen > 8)
-        wantLen = 8;
+    if (wantLen > 8) wantLen = 8;
     usbMsgLen -= wantLen;
     usbTxBuf[0] ^= USBPID_DATA0 ^ USBPID_DATA1; /* DATA toggling */
     len = usbDeviceRead(usbTxBuf + 1, wantLen);
-    if(len <= 8){           /* valid data packet */
+    if (len <= 8) { /* valid data packet */
         usbCrc16Append(&usbTxBuf[1], len);
-        len += 4;           /* length including sync byte */
-        if(len < 12)        /* a partial package identifies end of message */
+        len += 4;     /* length including sync byte */
+        if (len < 12) /* a partial package identifies end of message */
             usbMsgLen = USB_NO_MSG;
-    }else{
-        len = USBPID_STALL;   /* stall the endpoint */
+    } else {
+        len       = USBPID_STALL; /* stall the endpoint */
         usbMsgLen = USB_NO_MSG;
     }
     usbTxLen = len;
-    DBG2(0x20, usbTxBuf, len-1);
+    DBG2(0x20, usbTxBuf, len - 1);
 }
 
 /* ------------------------------------------------------------------------- */
 
-static inline void usbHandleResetHook(uchar notResetState)
-{
+static inline void usbHandleResetHook(uchar notResetState) {
 #ifdef USB_RESET_HOOK
-static uchar    wasReset;
-uchar           isReset = !notResetState;
+    static uchar wasReset;
+    uchar        isReset = !notResetState;
 
-    if(wasReset != isReset){
+    if (wasReset != isReset) {
         USB_RESET_HOOK(isReset);
         wasReset = isReset;
     }
@@ -562,40 +561,39 @@ uchar           isReset = !notResetState;
 
 /* ------------------------------------------------------------------------- */
 
-USB_PUBLIC void usbPoll(void)
-{
-schar   len;
-uchar   i;
+USB_PUBLIC void usbPoll(void) {
+    schar len;
+    uchar i;
 
     len = usbRxLen - 3;
-    if(len >= 0){
-/* We could check CRC16 here -- but ACK has already been sent anyway. If you
- * need data integrity checks with this driver, check the CRC in your app
- * code and report errors back to the host. Since the ACK was already sent,
- * retries must be handled on application level.
- * unsigned crc = usbCrc16(buffer + 1, usbRxLen - 3);
- */
+    if (len >= 0) {
+        /* We could check CRC16 here -- but ACK has already been sent anyway. If you
+         * need data integrity checks with this driver, check the CRC in your app
+         * code and report errors back to the host. Since the ACK was already sent,
+         * retries must be handled on application level.
+         * unsigned crc = usbCrc16(buffer + 1, usbRxLen - 3);
+         */
         usbProcessRx(usbRxBuf + USB_BUFSIZE + 1 - usbInputBufOffset, len);
 #if USB_CFG_HAVE_FLOWCONTROL
-        if(usbRxLen > 0)    /* only mark as available if not inactivated */
+        if (usbRxLen > 0) /* only mark as available if not inactivated */
             usbRxLen = 0;
 #else
-        usbRxLen = 0;       /* mark rx buffer as available */
+        usbRxLen = 0; /* mark rx buffer as available */
 #endif
     }
-    if(usbTxLen & 0x10){    /* transmit system idle */
-        if(usbMsgLen != USB_NO_MSG){    /* transmit data pending? */
+    if (usbTxLen & 0x10) {             /* transmit system idle */
+        if (usbMsgLen != USB_NO_MSG) { /* transmit data pending? */
             usbBuildTxBlock();
         }
     }
-    for(i = 20; i > 0; i--){
+    for (i = 20; i > 0; i--) {
         uchar usbLineStatus = USBIN & USBMASK;
-        if(usbLineStatus != 0)  /* SE0 has ended */
+        if (usbLineStatus != 0) /* SE0 has ended */
             goto isNotReset;
     }
     /* RESET condition, called multiple times during reset */
     usbNewDeviceAddr = 0;
-    usbDeviceAddr = 0;
+    usbDeviceAddr    = 0;
     usbResetStall();
     DBG1(0xff, 0, 0);
 isNotReset:
@@ -604,8 +602,7 @@ isNotReset:
 
 /* ------------------------------------------------------------------------- */
 
-USB_PUBLIC void usbInit(void)
-{
+USB_PUBLIC void usbInit(void) {
 #if USB_INTR_CFG_SET != 0
     USB_INTR_CFG |= USB_INTR_CFG_SET;
 #endif
@@ -616,9 +613,9 @@ USB_PUBLIC void usbInit(void)
     usbResetDataToggling();
 #if USB_CFG_HAVE_INTRIN_ENDPOINT && !USB_CFG_SUPPRESS_INTR_CODE
     usbTxLen1 = USBPID_NAK;
-#if USB_CFG_HAVE_INTRIN_ENDPOINT3
+#    if USB_CFG_HAVE_INTRIN_ENDPOINT3
     usbTxLen3 = USBPID_NAK;
-#endif
+#    endif
 #endif
 }