allow HID submodules to create runtime descriptors
with this PR you can add \#include Keyboard.h \#include Mouse.h \#include HID.h in the top of the sketch and you will expose a Mouse+Keyboard From the library pow, simply add static HID_Descriptor cb = { .length = sizeof(_hidReportDescriptor), .descriptor = _hidReportDescriptor, }; static HIDDescriptorListNode node(&cb); HID.AppendDescriptor(&node); in the class' constructor and you are done!
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@ -44,6 +44,9 @@ static u8 HID_INTERFACE;
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HIDDescriptor _hidInterface;
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static HIDDescriptorListNode* rootNode = NULL;
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static uint8_t sizeof_hidReportDescriptor = 0;
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static uint8_t modules_count = 0;
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//================================================================================
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//================================================================================
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// Driver
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@ -54,18 +57,45 @@ u8 _hid_idle = 1;
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int HID_GetInterface(u8* interfaceNum)
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{
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interfaceNum[0] += 1; // uses 1
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_hidInterface =
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{
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D_INTERFACE(HID_INTERFACE,1,3,0,0),
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D_HIDREPORT(sizeof_hidReportDescriptor),
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D_ENDPOINT(USB_ENDPOINT_IN (HID_ENDPOINT_INT),USB_ENDPOINT_TYPE_INTERRUPT,0x40,0x01)
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};
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return USB_SendControl(0,&_hidInterface,sizeof(_hidInterface));
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}
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int HID_GetDescriptor(int8_t t)
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{
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if (HID_REPORT_DESCRIPTOR_TYPE == t) {
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return USB_SendControl(TRANSFER_PGM,_hidReportDescriptor,getsizeof_hidReportDescriptor());
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HIDDescriptorListNode* current = rootNode;
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int total = 0;
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while(current != NULL) {
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total += USB_SendControl(TRANSFER_PGM,current->cb->descriptor,current->cb->length);
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current = current->next;
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}
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return total;
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} else {
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return 0;
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}
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}
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void HID_::AppendDescriptor(HIDDescriptorListNode *node)
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{
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if (modules_count == 0) {
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rootNode = node;
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} else {
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HIDDescriptorListNode *current = rootNode;
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while(current->next != NULL) {
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current = current->next;
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}
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current->next = node;
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}
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modules_count++;
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sizeof_hidReportDescriptor += node->cb->length;
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}
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void HID_::SendReport(u8 id, const void* data, int len)
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{
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USB_Send(HID_TX, &id, 1);
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@ -129,13 +159,6 @@ HID_::HID_(void)
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static PUSBListNode node(&cb);
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HID_ENDPOINT_INT = PUSB_AddFunction(&node, &HID_INTERFACE);
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_hidInterface =
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{
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D_INTERFACE(HID_INTERFACE,1,3,0,0),
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D_HIDREPORT(getsizeof_hidReportDescriptor()),
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D_ENDPOINT(USB_ENDPOINT_IN (HID_ENDPOINT_INT),USB_ENDPOINT_TYPE_INTERRUPT,0x40,0x01)
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};
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}
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int HID_::begin(void)
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@ -42,16 +42,27 @@
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#define HID_REPORT_DESCRIPTOR_TYPE 0x22
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#define HID_PHYSICAL_DESCRIPTOR_TYPE 0x23
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typedef struct __attribute__((packed)) {
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u8 length;
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const void* descriptor;
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} HID_Descriptor;
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class HIDDescriptorListNode {
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public:
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HIDDescriptorListNode *next = NULL;
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const HID_Descriptor * cb;
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HIDDescriptorListNode(const HID_Descriptor *ncb) {cb = ncb;}
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};
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class HID_
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{
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public:
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HID_(void);
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int begin(void);
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void SendReport(uint8_t id, const void* data, int len);
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void AppendDescriptor(HIDDescriptorListNode* node);
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};
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extern HID_ HID;
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typedef struct
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{
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u8 len; // 9
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@ -77,11 +88,6 @@ typedef struct
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#define D_HIDREPORT(_descriptorLength) \
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{ 9, 0x21, 0x1, 0x1, 0, 1, 0x22, _descriptorLength, 0 }
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extern const u8 _hidReportDescriptor[] PROGMEM;
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// MUST be declared by the module
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size_t getsizeof_hidReportDescriptor();
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#define WEAK __attribute__ ((weak))
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#endif
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