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-rw-r--r--usb/descriptor.h210
1 files changed, 161 insertions, 49 deletions
diff --git a/usb/descriptor.h b/usb/descriptor.h
index f806984..f889436 100644
--- a/usb/descriptor.h
+++ b/usb/descriptor.h
@@ -3,11 +3,23 @@
#include <stdint.h>
+template <typename A, typename B>
+struct X {
+ A a;
+ B b;
+} __attribute__((packed));
+
+template <typename A>
+constexpr A pack(A a) {
+ return a;
+}
+
+template <typename A, typename... R>
+constexpr auto pack(A a, R... r) -> X<A, decltype(pack(r...))> {
+ return {a, pack(r...)};
+}
+
struct Device_desc {
- enum {
- SIZE = 18,
- };
-
uint8_t bLength;
uint8_t bDescriptorType;
uint16_t bcdUSB;
@@ -24,12 +36,40 @@ struct Device_desc {
uint8_t bNumConfigurations;
};
+constexpr Device_desc device_desc(
+ uint16_t bcdUSB,
+ uint8_t bDeviceClass,
+ uint8_t bDeviceSubClass,
+ uint8_t bDeviceProtocol,
+ uint8_t bMaxPacketSize0,
+ uint16_t idVendor,
+ uint16_t idProduct,
+ uint16_t bcdDevice,
+ uint8_t iManufacturer,
+ uint8_t iProduct,
+ uint8_t iSerialNumber,
+ uint8_t bNumConfigurations
+ ) {
+
+ return {
+ sizeof(Device_desc),
+ 1,
+ bcdUSB,
+ bDeviceClass,
+ bDeviceSubClass,
+ bDeviceProtocol,
+ bMaxPacketSize0,
+ idVendor,
+ idProduct,
+ bcdDevice,
+ iManufacturer,
+ iProduct,
+ iSerialNumber,
+ bNumConfigurations
+ };
+}
struct Configuration_desc {
- enum {
- SIZE = 9,
- };
-
uint8_t bLength;
uint8_t bDescriptorType;
uint16_t wTotalLength;
@@ -40,11 +80,29 @@ struct Configuration_desc {
uint8_t bMaxPower;
} __attribute__((packed));
-struct Interface_desc {
- enum {
- SIZE = 9,
- };
+template <typename... R>
+constexpr auto configuration_desc(
+ uint8_t bNumInterfaces,
+ uint8_t bConfigurationvalue,
+ uint8_t iConfiguration,
+ uint8_t bmAttributes,
+ uint8_t bMaxPower,
+ R... r
+ ) -> decltype(pack(Configuration_desc(), r...)) {
+ return pack(Configuration_desc {
+ sizeof(Configuration_desc),
+ 2,
+ sizeof(pack(Configuration_desc(), r...)),
+ bNumInterfaces,
+ bConfigurationvalue,
+ iConfiguration,
+ bmAttributes,
+ bMaxPower
+ }, r...);
+}
+
+struct Interface_desc {
uint8_t bLength;
uint8_t bDescriptorType;
uint8_t bInterfaceNumber;
@@ -56,11 +114,32 @@ struct Interface_desc {
uint8_t iInterface;
} __attribute__((packed));
-struct Endpoint_desc {
- enum {
- SIZE = 7,
- };
+template <typename... R>
+constexpr auto interface_desc(
+ uint8_t bInterfaceNumber,
+ uint8_t bAlternateSetting,
+ uint8_t bNumEndpoints,
+ uint8_t bInterfaceClass,
+ uint8_t bInterfaceSubClass,
+ uint8_t bInterfaceProtocol,
+ uint8_t iInterface,
+ R... r
+ ) -> decltype(pack(Interface_desc(), r...)) {
+ return pack(Interface_desc {
+ sizeof(Interface_desc),
+ 4,
+ bInterfaceNumber,
+ bAlternateSetting,
+ bNumEndpoints,
+ bInterfaceClass,
+ bInterfaceSubClass,
+ bInterfaceProtocol,
+ iInterface
+ }, r...);
+}
+
+struct Endpoint_desc {
uint8_t bLength;
uint8_t bDescriptorType;
uint8_t bEndpointAddress;
@@ -69,22 +148,43 @@ struct Endpoint_desc {
uint8_t bInterval;
} __attribute__((packed));
-struct CDC_Header_desc {
- enum {
- SIZE = 5,
- };
+constexpr Endpoint_desc endpoint_desc(
+ uint8_t bEndpointAddress,
+ uint8_t bmAttributes,
+ uint16_t wMaxPacketSize,
+ uint8_t bInterval
+ ) {
+ return {
+ sizeof(Endpoint_desc),
+ 5,
+ bEndpointAddress,
+ bmAttributes,
+ wMaxPacketSize,
+ bInterval
+ };
+}
+
+struct CDC_Header_desc {
uint8_t bLength;
uint8_t bDescriptorType;
uint8_t bDescriptorSubType;
uint16_t bcdCDC;
} __attribute__((packed));
-struct CDC_Call_Management_desc {
- enum {
- SIZE = 5,
- };
+constexpr CDC_Header_desc cdc_header_desc(
+ uint16_t bcdCDC
+ ) {
+ return {
+ sizeof(CDC_Header_desc),
+ 0x24,
+ 0x00,
+ bcdCDC
+ };
+}
+
+struct CDC_Call_Management_desc {
uint8_t bLength;
uint8_t bDescriptorType;
uint8_t bDescriptorSubType;
@@ -92,22 +192,40 @@ struct CDC_Call_Management_desc {
uint8_t bDataInterface;
} __attribute__((packed));
-struct CDC_ACM_desc {
- enum {
- SIZE = 4,
- };
+constexpr CDC_Call_Management_desc cdc_call_management_desc(
+ uint8_t bmCapabilities,
+ uint8_t bDataInterface
+ ) {
+ return {
+ sizeof(CDC_Call_Management_desc),
+ 0x24,
+ 0x01,
+ bmCapabilities,
+ bDataInterface
+ };
+}
+
+struct CDC_ACM_desc {
uint8_t bLength;
uint8_t bDescriptorType;
uint8_t bDescriptorSubType;
uint8_t bmCapabilities;
} __attribute__((packed));
-struct CDC_Union_desc {
- enum {
- SIZE = 5,
- };
+constexpr CDC_ACM_desc cdc_acm_desc(
+ uint8_t bmCapabilities
+ ) {
+ return {
+ sizeof(CDC_ACM_desc),
+ 0x24,
+ 0x02,
+ bmCapabilities
+ };
+}
+
+struct CDC_Union_desc {
uint8_t bLength;
uint8_t bDescriptorType;
uint8_t bDescriptorSubType;
@@ -115,24 +233,18 @@ struct CDC_Union_desc {
uint8_t bSubordinateInterface0;
} __attribute__((packed));
-template <typename A, typename B>
-struct X {
- enum {
- SIZE = A::SIZE + B::SIZE,
- };
+constexpr CDC_Union_desc cdc_union_desc(
+ uint8_t bControlInterface,
+ uint8_t bSubordinateInterface0
+ ) {
- A a;
- B b;
-} __attribute__((packed));
-
-template <typename A>
-constexpr A pack(A a) {
- return a;
-}
-
-template <typename A, typename... R>
-constexpr auto pack(A a, R... r) -> X<A, decltype(pack(r...))> {
- return {a, pack(r...)};
+ return {
+ sizeof(CDC_Union_desc),
+ 0x24,
+ 0x06,
+ bControlInterface,
+ bSubordinateInterface0
+ };
}
#endif