mirror of
https://github.com/eddyem/stm32samples.git
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313 lines
9.3 KiB
C
313 lines
9.3 KiB
C
/*
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* This file is part of the libopencm3 project.
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*
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* Copyright (C) 2010 Gareth McMullin <gareth@blacksphere.co.nz>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdlib.h>
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#include <libopencm3/stm32/rcc.h>
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#include <libopencm3/stm32/gpio.h>
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#include <libopencm3/cm3/systick.h>
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#include <libopencm3/usb/usbd.h>
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#include <libopencm3/usb/hid.h>
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#include <libopencm3/cm3/nvic.h>
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#include "keycodes.h"
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const struct usb_device_descriptor dev = {
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.bLength = USB_DT_DEVICE_SIZE,
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.bDescriptorType = USB_DT_DEVICE,
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.bcdUSB = 0x0200,
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.bDeviceClass = 0,
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.bDeviceSubClass = 0,
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.bDeviceProtocol = 0,
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.bMaxPacketSize0 = 64,
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.idVendor = 0x0483,
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.idProduct = 0x5710,
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.bcdDevice = 0x0200,
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.iManufacturer = 1,
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.iProduct = 2,
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.iSerialNumber = 3,
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.bNumConfigurations = 1,
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};
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static const uint8_t hid_report_descriptor[] =
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{
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0x05, 0x01, /* Usage Page (Generic Desktop) */
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0x09, 0x02, /* Usage (Mouse) */
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0xA1, 0x01, /* Collection (Application) */
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0x09, 0x01, /* Usage (Pointer) */
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0xA1, 0x00, /* Collection (Physical) */
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0x85, 0x01, /* Report ID */
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0x05, 0x09, /* Usage Page (Buttons) */
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0x19, 0x01, /* Usage Minimum (01) */
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0x29, 0x03, /* Usage Maximum (03) */
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0x15, 0x00, /* Logical Minimum (0) */
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0x25, 0x01, /* Logical Maximum (0) */
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0x95, 0x03, /* Report Count (3) */
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0x75, 0x01, /* Report Size (1) */
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0x81, 0x02, /* Input (Data, Variable, Absolute) */
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0x95, 0x01, /* Report Count (1) */
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0x75, 0x05, /* Report Size (5) */
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0x81, 0x01, /* Input (Constant) ;5 bit padding */
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0x05, 0x01, /* Usage Page (Generic Desktop) */
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0x09, 0x30, /* Usage (X) */
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0x09, 0x31, /* Usage (Y) */
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0x15, 0x81, /* Logical Minimum (-127) */
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0x25, 0x7F, /* Logical Maximum (127) */
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0x75, 0x08, /* Report Size (8) */
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0x95, 0x02, /* Report Count (2) */
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0x81, 0x06, /* Input (Data, Variable, Relative) */
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0xC0, 0xC0,/* End Collection,End Collection */
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//
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0x09, 0x06, /* Usage (Keyboard) */
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0xA1, 0x01, /* Collection (Application) */
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0x85, 0x02, /* Report ID */
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0x05, 0x07, /* Usage (Key codes) */
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0x19, 0xE0, /* Usage Minimum (224) */
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0x29, 0xE7, /* Usage Maximum (231) */
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0x15, 0x00, /* Logical Minimum (0) */
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0x25, 0x01, /* Logical Maximum (1) */
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0x75, 0x01, /* Report Size (1) */
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0x95, 0x08, /* Report Count (8) */
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0x81, 0x02, /* Input (Data, Variable, Absolute) */
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0x95, 0x01, /* Report Count (1) */
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0x75, 0x08, /* Report Size (8) */
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0x81, 0x01, /* Input (Constant) ;5 bit padding */
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0x95, 0x05, /* Report Count (5) */
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0x75, 0x01, /* Report Size (1) */
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0x05, 0x08, /* Usage Page (Page# for LEDs) */
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0x19, 0x01, /* Usage Minimum (01) */
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0x29, 0x05, /* Usage Maximum (05) */
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0x91, 0x02, /* Output (Data, Variable, Absolute) */
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0x95, 0x01, /* Report Count (1) */
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0x75, 0x03, /* Report Size (3) */
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0x91, 0x01, /* Output (Constant) */
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0x95, 0x06, /* Report Count (1) */
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0x75, 0x08, /* Report Size (3) */
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0x15, 0x00, /* Logical Minimum (0) */
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0x25, 0x65, /* Logical Maximum (101) */
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0x05, 0x07, /* Usage (Key codes) */
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0x19, 0x00, /* Usage Minimum (00) */
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0x29, 0x65, /* Usage Maximum (101) */
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0x81, 0x00, /* Input (Data, Array) */
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0xC0 /* End Collection,End Collection */
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};
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static const struct {
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struct usb_hid_descriptor hid_descriptor;
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struct {
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uint8_t bReportDescriptorType;
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uint16_t wDescriptorLength;
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} __attribute__((packed)) hid_report;
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} __attribute__((packed)) hid_function = {
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.hid_descriptor = {
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.bLength = sizeof(hid_function),
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.bDescriptorType = USB_DT_HID,
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.bcdHID = 0x0100,
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.bCountryCode = 0,
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.bNumDescriptors = 1,
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},
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.hid_report = {
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.bReportDescriptorType = USB_DT_REPORT,
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.wDescriptorLength = sizeof(hid_report_descriptor),
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},
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};
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const struct usb_endpoint_descriptor hid_endpoint = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = 0x81,
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.bmAttributes = USB_ENDPOINT_ATTR_INTERRUPT,
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.wMaxPacketSize = 9,
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.bInterval = 0x05,
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};
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const struct usb_interface_descriptor hid_iface = {
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.bLength = USB_DT_INTERFACE_SIZE,
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.bDescriptorType = USB_DT_INTERFACE,
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.bInterfaceNumber = 0,
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.bAlternateSetting = 0,
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.bNumEndpoints = 1,
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.bInterfaceClass = USB_CLASS_HID,
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.bInterfaceSubClass = 1, // boot
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.bInterfaceProtocol = 1, // keyboard
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.iInterface = 0,
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.endpoint = &hid_endpoint,
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.extra = &hid_function,
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.extralen = sizeof(hid_function),
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};
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const struct usb_interface ifaces[] = {{
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.num_altsetting = 1,
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.altsetting = &hid_iface,
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}};
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const struct usb_config_descriptor config = {
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.bLength = USB_DT_CONFIGURATION_SIZE,
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.bDescriptorType = USB_DT_CONFIGURATION,
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.wTotalLength = 0,
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.bNumInterfaces = 1,
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.bConfigurationValue = 1,
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.iConfiguration = 0,
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.bmAttributes = 0xC0,
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.bMaxPower = 0x32,
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.interface = ifaces,
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};
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static const char *usb_strings[] = {
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"Something strange",
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"Keyboard + mouse",
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"demo",
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};
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/* Buffer to be used for control requests. */
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uint8_t usbd_control_buffer[128];
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static int hid_control_request(usbd_device *usbd_dev, struct usb_setup_data *req, uint8_t **buf, uint16_t *len,
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void (**complete)(usbd_device *usbd_dev, struct usb_setup_data *req))
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{
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(void)complete;
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(void)usbd_dev;
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if ((req->bmRequestType != 0x81) ||
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(req->bRequest != USB_REQ_GET_DESCRIPTOR) ||
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(req->wValue != 0x2200))
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return 0;
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/* Handle the HID report descriptor. */
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*buf = (uint8_t *)hid_report_descriptor;
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*len = sizeof(hid_report_descriptor);
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return 1;
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}
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static void hid_set_config(usbd_device *usbd_dev, uint16_t wValue)
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{
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(void)wValue;
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(void)usbd_dev;
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usbd_ep_setup(usbd_dev, 0x81, USB_ENDPOINT_ATTR_INTERRUPT, 4, NULL);
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usbd_register_control_callback(
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usbd_dev,
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USB_REQ_TYPE_STANDARD | USB_REQ_TYPE_INTERFACE,
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USB_REQ_TYPE_TYPE | USB_REQ_TYPE_RECIPIENT,
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hid_control_request);
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systick_set_clocksource(STK_CSR_CLKSOURCE_AHB_DIV8);
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/* SysTick interrupt every N clock pulses: set reload to N-1 */
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systick_set_reload(99999);
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systick_interrupt_enable();
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systick_counter_enable();
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}
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usbd_device *usbd_dev;
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int main(void)
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{
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int i;
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rcc_clock_setup_in_hsi_out_48mhz();
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rcc_periph_clock_enable(RCC_GPIOC);
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gpio_set(GPIOC, GPIO11);
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gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_2_MHZ,
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GPIO_CNF_OUTPUT_PUSHPULL, GPIO11);
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usbd_dev = usbd_init(&stm32f103_usb_driver, &dev, &config, usb_strings, 3, usbd_control_buffer, sizeof(usbd_control_buffer));
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usbd_register_set_config_callback(usbd_dev, hid_set_config);
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for (i = 0; i < 0x80000; i++)
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__asm__("nop");
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gpio_clear(GPIOC, GPIO11);
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while (1)
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usbd_poll(usbd_dev);
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}
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void move_mouse(int8_t x, int8_t y){
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/*
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* buf[0]: 1 - report ID
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* buf[1]: bit2 - middle button, bit1 - right, bit0 - left
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* buf[2]: move X
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* buf[3]: move Y
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* buf[4]: wheel
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*/
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int8_t buf[5] = {1,0,0,0,0};
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buf[2] = x; buf[3] = y;
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while(5 != usbd_ep_write_packet(usbd_dev, 0x81, buf, 5));
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}
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/*
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* Keyboard buffer:
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* buf[1]: MOD
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* buf[2]: reserved
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* buf[3]..buf[8] - keycodes 1..6
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*/
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void send_word(char *wrd){
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do{
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while(9 != usbd_ep_write_packet(usbd_dev, 0x81, press_key(*wrd), 9));
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while(9 != usbd_ep_write_packet(usbd_dev, 0x81, release_key(), 9));
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}while(*(++wrd));
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}
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void sys_tick_handler(void){
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static int steps = 0;
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static uint8_t state = 0;
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int8_t x = 0, y = 0;
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switch (state){
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case 0:
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x = 1;
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break;
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case 1:
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y = 1;
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break;
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case 2:
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x = -1;
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break;
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default:
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y = -1;
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break;
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}
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if(++steps > 40){
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switch (state){
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case 0:
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send_word("top right\n");
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break;
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case 1:
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send_word("bottom right\n");
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break;
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case 2:
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send_word("bottom left\n");
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break;
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default:
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send_word("top left\n");
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break;
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}
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steps = 0;
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if(++state == 4)
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state = 0;
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}
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move_mouse(x, y);
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}
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