mirror of
https://github.com/eddyem/stm32samples.git
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277 lines
8.1 KiB
C
277 lines
8.1 KiB
C
/*
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* usbkeybrd.c
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*
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* Copyright 2015 Edward V. Emelianov <eddy@sao.ru, edward.emelianoff@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#include "usbkeybrd.h"
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#include "keycodes.h"
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#define BUFLEN (1024)
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static char sendbuf[BUFLEN];
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static char *msg_start = sendbuf, *msg_end = sendbuf;
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static const char *buf_end = sendbuf+BUFLEN;
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usbd_device *usbd_dev;
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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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// 0x045E 0x005C - Microsoft Office Keyboard (106/109)
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.idVendor = 0x045E,
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.idProduct = 0x005C,
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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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0x05, 0x01, /* Usage Page (Generic Desktop) */
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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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0x09, 0x05, /* Usage (Vendor Defined) */
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0x15, 0x00, /* Logical Minimum (0)) */
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0x26, 0xFF, 0x00, /* Logical Maximum (255)) */
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0x75, 0x08, /* Report Count (2)) */
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0x95, 0x02, /* Report Size (8 bit)) */
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0xB1, 0x02, /* Feature (Data, Variable, Absolute) */
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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 = 8,
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.bInterval = 0x10,
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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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"Timelapse keyboard",
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"EEV",
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"v01",
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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 got_config = 0;
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static int hid_control_request(usbd_device *usbddev, struct usb_setup_data *req, uint8_t **buf, uint16_t *len,
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void (**complete)(usbd_device *usbddev, struct usb_setup_data *req)){
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(void)complete;
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(void)usbddev;
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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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*buf = (uint8_t *)hid_report_descriptor;
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*len = sizeof(hid_report_descriptor);
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got_config = 1;
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return 1;
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}
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void hid_set_config(usbd_device *usbddev, uint16_t wValue){
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(void)wValue;
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(void)usbddev;
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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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usbddev,
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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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}
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void usbkeybrd_setup(){
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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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}
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void put_char_to_buf(char ch){
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*(msg_end++) = ch;
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if(msg_end == buf_end)
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msg_end = sendbuf;
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}
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/**
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* put data into keyboard buffer
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* THERE's NO DATA CORRUPTION CONTROL HERE!!!
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*/
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void send_msg(char *msg){
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while(*msg){
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put_char_to_buf(*(msg++));
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}
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}
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/*
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void newline(){
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put_char_to_buf('\n');
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}*/
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/**
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* send data from keyboard buffer
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*/
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void process_usbkbrd(){
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if(!got_config) return; // don't allow sending messages until first connection - to prevent hangs
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static uint8_t pressed = 0;
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if(pressed){ // the keyboard was "pressed"
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if(8 == usbd_ep_write_packet(usbd_dev, 0x81, release_key(), 8))
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pressed = 0;
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}else if(msg_start != msg_end){ // we need to send keypress event
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if(8 == usbd_ep_write_packet(usbd_dev, 0x81, press_key(*msg_start), 8)){
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if(++msg_start == buf_end)
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msg_start = sendbuf;
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pressed = 1;
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}
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}else return;
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}
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/**
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* Print buff as hex values
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* @param buf - buffer to print
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* @param l - buf length
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* @param s - function to send a byte
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*/
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void print_hex(uint8_t *buff, uint8_t l){
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inline void putc(char c){
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if(c < 10)
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put_char_to_buf(c + '0');
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else
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put_char_to_buf(c + 'a' - 10);
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}
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put_char_to_buf('0');
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put_char_to_buf('x');
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while(l--){
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putc(buff[l] >> 4);
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putc(buff[l] & 0x0f);
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}
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}
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/**
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* Print decimal integer value
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* @param N - value to print
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* @param s - function to send a byte
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*/
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void print_int(int32_t N){
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char buf[10];
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int32_t L = 0;
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if(N < 0){
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put_char_to_buf('-');
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N = -N;
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}
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if(N){
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while(N){
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buf[L++] = N % 10 + '0';
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N /= 10;
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}
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while(L--) put_char_to_buf(buf[L]);
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}else put_char_to_buf('0');
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}
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