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-rw-r--r--src/usbhid.c317
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diff --git a/src/usbhid.c b/src/usbhid.c
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+++ b/src/usbhid.c
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+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2010 Gareth McMullin <gareth@blacksphere.co.nz>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdlib.h>
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
+#include <libopencm3/cm3/systick.h>
+#include <libopencm3/usb/usbd.h>
+#include <libopencm3/usb/hid.h>
+
+/* Define this to include the DFU APP interface. */
+#define INCLUDE_DFU_INTERFACE
+
+#ifdef INCLUDE_DFU_INTERFACE
+#include <libopencm3/cm3/scb.h>
+#include <libopencm3/usb/dfu.h>
+#endif
+
+const struct usb_device_descriptor dev = {
+ .bLength = USB_DT_DEVICE_SIZE,
+ .bDescriptorType = USB_DT_DEVICE,
+ .bcdUSB = 0x0200,
+ .bDeviceClass = 0,
+ .bDeviceSubClass = 0,
+ .bDeviceProtocol = 0,
+ .bMaxPacketSize0 = 64,
+ .idVendor = 0x0483,
+ .idProduct = 0x5710,
+ .bcdDevice = 0x0200,
+ .iManufacturer = 1,
+ .iProduct = 2,
+ .iSerialNumber = 3,
+ .bNumConfigurations = 1,
+};
+
+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),
+};
+
+#ifdef INCLUDE_DFU_INTERFACE
+const struct usb_dfu_descriptor dfu_function = {
+ .bLength = sizeof(struct usb_dfu_descriptor),
+ .bDescriptorType = DFU_FUNCTIONAL,
+ .bmAttributes = USB_DFU_CAN_DOWNLOAD | USB_DFU_WILL_DETACH,
+ .wDetachTimeout = 255,
+ .wTransferSize = 1024,
+ .bcdDFUVersion = 0x011A,
+};
+
+const struct usb_interface_descriptor dfu_iface = {
+ .bLength = USB_DT_INTERFACE_SIZE,
+ .bDescriptorType = USB_DT_INTERFACE,
+ .bInterfaceNumber = 1,
+ .bAlternateSetting = 0,
+ .bNumEndpoints = 0,
+ .bInterfaceClass = 0xFE,
+ .bInterfaceSubClass = 1,
+ .bInterfaceProtocol = 1,
+ .iInterface = 0,
+
+ .extra = &dfu_function,
+ .extralen = sizeof(dfu_function),
+};
+#endif
+
+const struct usb_interface ifaces[] = {{
+ .num_altsetting = 1,
+ .altsetting = &hid_iface,
+#ifdef INCLUDE_DFU_INTERFACE
+}, {
+ .num_altsetting = 1,
+ .altsetting = &dfu_iface,
+#endif
+}};
+
+const struct usb_config_descriptor config = {
+ .bLength = USB_DT_CONFIGURATION_SIZE,
+ .bDescriptorType = USB_DT_CONFIGURATION,
+ .wTotalLength = 0,
+#ifdef INCLUDE_DFU_INTERFACE
+ .bNumInterfaces = 2,
+#else
+ .bNumInterfaces = 1,
+#endif
+ .bConfigurationValue = 1,
+ .iConfiguration = 0,
+ .bmAttributes = 0xC0,
+ .bMaxPower = 0x32,
+
+ .interface = ifaces,
+};
+
+static const char *usb_strings[] = {
+ "Cabbages are good for you",
+ "fish",
+ "soup",
+};
+
+/* Buffer to be used for control requests. */
+uint8_t usbd_control_buffer[128];
+
+static 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;
+}
+
+#ifdef INCLUDE_DFU_INTERFACE
+static void dfu_detach_complete(usbd_device *usbd_dev, struct usb_setup_data *req)
+{
+ (void)req;
+ (void)usbd_dev;
+
+ gpio_set_mode(GPIOA, GPIO_MODE_INPUT, 0, GPIO15);
+ gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_2_MHZ,
+ GPIO_CNF_OUTPUT_PUSHPULL, GPIO10);
+ gpio_set(GPIOA, GPIO10);
+ scb_reset_core();
+}
+
+static int dfu_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)buf;
+ (void)len;
+ (void)usbd_dev;
+
+ if ((req->bmRequestType != 0x21) || (req->bRequest != DFU_DETACH))
+ return 0; /* Only accept class request. */
+
+ *complete = dfu_detach_complete;
+
+ return 1;
+}
+#endif
+
+static void hid_set_config(usbd_device *usbd_dev, uint16_t wValue)
+{
+ (void)wValue;
+ (void)usbd_dev;
+
+ usbd_ep_setup(usbd_dev, 0x81, USB_ENDPOINT_ATTR_INTERRUPT, 4, NULL);
+
+ usbd_register_control_callback(
+ usbd_dev,
+ USB_REQ_TYPE_STANDARD | USB_REQ_TYPE_INTERFACE,
+ USB_REQ_TYPE_TYPE | USB_REQ_TYPE_RECIPIENT,
+ hid_control_request);
+#ifdef INCLUDE_DFU_INTERFACE
+ usbd_register_control_callback(
+ usbd_dev,
+ USB_REQ_TYPE_CLASS | USB_REQ_TYPE_INTERFACE,
+ USB_REQ_TYPE_TYPE | USB_REQ_TYPE_RECIPIENT,
+ dfu_control_request);
+#endif
+
+ systick_set_clocksource(STK_CSR_CLKSOURCE_AHB_DIV8);
+ /* SysTick interrupt every N clock pulses: set reload to N-1 */
+ systick_set_reload(99999);
+ systick_interrupt_enable();
+ systick_counter_enable();
+}
+
+int main(void)
+{
+ int i;
+
+ usbd_device *usbd_dev;
+
+ rcc_clock_setup_in_hsi_out_48mhz();
+
+ rcc_periph_clock_enable(RCC_GPIOC);
+
+ gpio_set(GPIOC, GPIO11);
+ gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_2_MHZ,
+ GPIO_CNF_OUTPUT_PUSHPULL, GPIO11);
+
+ usbd_dev = usbd_init(&stm32f103_usb_driver, &dev, &config, usb_strings, 3, usbd_control_buffer, sizeof(usbd_control_buffer));
+ usbd_register_set_config_callback(usbd_dev, hid_set_config);
+
+ for (i = 0; i < 0x80000; i++)
+ __asm__("nop");
+
+ gpio_clear(GPIOC, GPIO11);
+
+ while (1)
+ usbd_poll(usbd_dev);
+}
+
+#if 0 /* is this used? */
+void sys_tick_handler(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);
+}
+#endif
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