mirror of
https://github.com/eddyem/stm32samples.git
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278 lines
9.4 KiB
C
278 lines
9.4 KiB
C
/*
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* main.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 <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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#include "matrixkbd.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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// 0x03EB 0x2042 - Atmel Keyboard Demo Application
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.idVendor = 0x03EB,
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.idProduct = 0x2042,
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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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#if 0
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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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0x75, 0x01, // Report Size (1),
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0x95, 0x08, // Report Count (8),
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0x05, 0x07, // Usage Page (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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0x81, 0x02, // Input (Data, Variable, Absolute), ;Modifier byte
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0x95, 0x01, // Report Count (1),
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0x75, 0x08, // Report Size (8),
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0x81, 0x03, // Input (Constant), ;Reserved byte
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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 (LEDs),
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0x19, 0x01, // Usage Minimum (1),
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0x29, 0x05, // Usage Maximum (5),
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0x91, 0x02, // Output (Data, Variable, Absolute), ;LED report
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0x95, 0x01, // Report Count (1),
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0x75, 0x03, // Report Size (3),
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0x91, 0x03, // Output (Constant), ;LED report padding
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0x95, 0x06, // Report Count (6),
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0x75, 0x08, // Report Size (8),
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0x15, 0x00, // Logical Minimum (0),
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0x25, 0x68, // Logical Maximum(104),
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0x05, 0x07, // Usage Page (Key Codes),
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0x19, 0x00, // Usage Minimum (0),
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0x29, 0x68, // Usage Maximum (104),
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0x81, 0x00, // Input (Data, Array),
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0xc0 // End Collection
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};
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#endif
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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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"Simple matrix keyboard 3x4",
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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 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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(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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*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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(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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}
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/*
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* SysTick used for system timer with period of 1ms
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*/
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void SysTick_init(){
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systick_set_clocksource(STK_CSR_CLKSOURCE_AHB_DIV8); // Systyck: 72/8=9MHz
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systick_set_reload(8999); // 9000 pulses: 1kHz
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systick_interrupt_enable();
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systick_counter_enable();
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}
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int main(void){
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usbd_device *usbd_dev;
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rcc_clock_setup_in_hsi_out_48mhz();
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SysTick_init();
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/*
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// if PC11 connected to usb 1.5kOhm pull-up through transistor
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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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*/
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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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matrixkbd_init();
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/*
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int i;
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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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*/
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while (1){
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char prsd, rlsd;
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usbd_poll(usbd_dev);
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get_matrixkbd(&prsd, &rlsd);
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if(rlsd)
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while(8 != usbd_ep_write_packet(usbd_dev, 0x81, release_key(), 8));
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if(prsd)
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while(8 != usbd_ep_write_packet(usbd_dev, 0x81, press_key(prsd), 8));
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}
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}
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volatile uint32_t Timer = 0; // global timer (milliseconds)
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/**
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* SysTick interrupt: increment global time & send data buffer through USB
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*/
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void sys_tick_handler(){
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Timer++;
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}
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