diff options
Diffstat (limited to 'src/hid.c')
| -rw-r--r-- | src/hid.c | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/src/hid.c b/src/hid.c new file mode 100644 index 0000000..8feb1cb --- /dev/null +++ b/src/hid.c @@ -0,0 +1,126 @@ +#include "project.h" + +static const uint8_t hid_report_descriptor[] = { + 0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */ + 0x09, 0x02, /* USAGE (Mouse) */ + 0xa1, 0x01, /* COLLECTION (Application) */ + 0x09, 0x01, /* USAGE (Pointer) */ + 0xa1, 0x00, /* COLLECTION (Physical) */ + 0x05, 0x09, /* USAGE_PAGE (Button) */ + 0x19, 0x01, /* USAGE_MINIMUM (Button 1) */ + 0x29, 0x03, /* USAGE_MAXIMUM (Button 3) */ + 0x15, 0x00, /* LOGICAL_MINIMUM (0) */ + 0x25, 0x01, /* LOGICAL_MAXIMUM (1) */ + 0x95, 0x03, /* REPORT_COUNT (3) */ + 0x75, 0x01, /* REPORT_SIZE (1) */ + 0x81, 0x02, /* INPUT (Data,Var,Abs) */ + 0x95, 0x01, /* REPORT_COUNT (1) */ + 0x75, 0x05, /* REPORT_SIZE (5) */ + 0x81, 0x01, /* INPUT (Cnst,Ary,Abs) */ + 0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */ + 0x09, 0x30, /* USAGE (X) */ + 0x09, 0x31, /* USAGE (Y) */ + 0x09, 0x38, /* USAGE (Wheel) */ + 0x15, 0x81, /* LOGICAL_MINIMUM (-127) */ + 0x25, 0x7f, /* LOGICAL_MAXIMUM (127) */ + 0x75, 0x08, /* REPORT_SIZE (8) */ + 0x95, 0x03, /* REPORT_COUNT (3) */ + 0x81, 0x06, /* INPUT (Data,Var,Rel) */ + 0xc0, /* END_COLLECTION */ + 0x09, 0x3c, /* USAGE (Motion Wakeup) */ + 0x05, 0xff, /* USAGE_PAGE (Vendor Defined Page 1) */ + 0x09, 0x01, /* USAGE (Vendor Usage 1) */ + 0x15, 0x00, /* LOGICAL_MINIMUM (0) */ + 0x25, 0x01, /* LOGICAL_MAXIMUM (1) */ + 0x75, 0x01, /* REPORT_SIZE (1) */ + 0x95, 0x02, /* REPORT_COUNT (2) */ + 0xb1, 0x22, /* FEATURE (Data,Var,Abs,NPrf) */ + 0x75, 0x06, /* REPORT_SIZE (6) */ + 0x95, 0x01, /* REPORT_COUNT (1) */ + 0xb1, 0x01, /* FEATURE (Cnst,Ary,Abs) */ + 0xc0 /* END_COLLECTION */ +}; + +static const struct { + struct usb_hid_descriptor hid_descriptor; + struct { + uint8_t bReportDescriptorType; + uint16_t wDescriptorLength; + } __attribute__((packed)) hid_report; +} __attribute__((packed)) hid_function = { + .hid_descriptor = { + .bLength = sizeof(hid_function), + .bDescriptorType = USB_DT_HID, + .bcdHID = 0x0100, + .bCountryCode = 0, + .bNumDescriptors = 1, + }, + .hid_report = { + .bReportDescriptorType = USB_DT_REPORT, + .wDescriptorLength = sizeof(hid_report_descriptor), + }, +}; + +const struct usb_endpoint_descriptor hid_endpoint = { + .bLength = USB_DT_ENDPOINT_SIZE, + .bDescriptorType = USB_DT_ENDPOINT, + .bEndpointAddress = 0x81, + .bmAttributes = USB_ENDPOINT_ATTR_INTERRUPT, + .wMaxPacketSize = 4, + .bInterval = 0x20, +}; + +const struct usb_interface_descriptor hid_iface = { + .bLength = USB_DT_INTERFACE_SIZE, + .bDescriptorType = USB_DT_INTERFACE, + .bInterfaceNumber = 0, + .bAlternateSetting = 0, + .bNumEndpoints = 1, + .bInterfaceClass = USB_CLASS_HID, + .bInterfaceSubClass = 1, /* boot */ + .bInterfaceProtocol = 2, /* mouse */ + .iInterface = 0, + + .endpoint = &hid_endpoint, + + .extra = &hid_function, + .extralen = sizeof(hid_function), +}; + +/* Buffer to be used for control requests. */ +uint8_t usbd_control_buffer[128]; + +int hid_control_request(usbd_device *usbd_dev, struct usb_setup_data *req, uint8_t **buf, uint16_t *len, + void (**complete)(usbd_device *usbd_dev, struct usb_setup_data *req)) +{ + (void)complete; + (void)usbd_dev; + + if ((req->bmRequestType != 0x81) || + (req->bRequest != USB_REQ_GET_DESCRIPTOR) || + (req->wValue != 0x2200)) + return 0; + + /* Handle the HID report descriptor. */ + *buf = (uint8_t *)hid_report_descriptor; + *len = sizeof(hid_report_descriptor); + + return 1; +} + +void hid_test(void) +{ + static int x = 0; + static int dir = 1; + uint8_t buf[4] = {0, 0, 0, 0}; + + buf[1] = dir; + x += dir; + if (x > 30) + dir = -dir; + if (x < -30) + dir = -dir; + + usbd_ep_write_packet(usbd_dev, 0x81, buf, 4); +} + |