tmk_core/protocol/vusb/main.c

   1 /* Name: main.c
   2  * Project: hid-mouse, a very simple HID example
   3  * Author: Christian Starkjohann
   4  * Creation Date: 2008-04-07
   5  * Tabsize: 4
   6  * Copyright: (c) 2008 by OBJECTIVE DEVELOPMENT Software GmbH
   7  * License: GNU GPL v2 (see License.txt), GNU GPL v3 or proprietary (CommercialLicense.txt)
   8  * This Revision: $Id: main.c 790 2010-05-30 21:00:26Z cs $
   9  */
  10 #include <stdint.h>
  11 #include <avr/interrupt.h>
  12 #include <avr/wdt.h>
  13 #include <avr/sleep.h>
  14 #include <util/delay.h>
  15 #include "usbdrv.h"
  16 #include "oddebug.h"
  17 #include "vusb.h"
  18 #include "keyboard.h"
  19 #include "host.h"
  20 #include "timer.h"
  21 #include "uart.h"
  22 #include "debug.h"
  23
  24
  25 #define UART_BAUD_RATE 115200
  26
  27
  28 /* This is from main.c of USBaspLoader */
  29 static void initForUsbConnectivity(void)
  30 {
  31     uint8_t i = 0;
  32
  33     usbInit();
  34     /* enforce USB re-enumerate: */
  35     usbDeviceDisconnect();  /* do this while interrupts are disabled */
  36     while(--i){         /* fake USB disconnect for > 250 ms */
  37         wdt_reset();
  38         _delay_ms(1);
  39     }
  40     usbDeviceConnect();
  41     sei();
  42 }
  43
  44 int main(void)
  45 {
  46     bool suspended = false;
  47 #if USB_COUNT_SOF
  48     uint16_t last_timer = timer_read();
  49 #endif
  50
  51 #ifdef CLKPR
  52     // avoid unintentional changes of clock frequency in devices that have a
  53     // clock prescaler
  54     CLKPR = 0x80, CLKPR = 0;
  55 #endif
  56 #ifndef NO_UART
  57     uart_init(UART_BAUD_RATE);
  58 #endif
  59     keyboard_setup();
  60
  61     keyboard_init();
  62     host_set_driver(vusb_driver());
  63
  64     debug("initForUsbConnectivity()\n");
  65     initForUsbConnectivity();
  66
  67     debug("main loop\n");
  68     while (1) {
  69 #if USB_COUNT_SOF
  70         if (usbSofCount != 0) {
  71             suspended = false;
  72             usbSofCount = 0;
  73             last_timer = timer_read();
  74         } else {
  75             // Suspend when no SOF in 3ms-10ms(7.1.7.4 Suspending of USB1.1)
  76             if (timer_elapsed(last_timer) > 5) {
  77                 suspended = true;
  78 /*
  79                 uart_putchar('S');
  80                 _delay_ms(1);
  81                 cli();
  82                 set_sleep_mode(SLEEP_MODE_PWR_DOWN);
  83                 sleep_enable();
  84                 sleep_bod_disable();
  85                 sei();
  86                 sleep_cpu();
  87                 sleep_disable();
  88                 _delay_ms(10);
  89                 uart_putchar('W');
  90 */
  91             }
  92         }
  93 #endif
  94         if (!suspended) {
  95             usbPoll();
  96
  97             // TODO: configuration process is incosistent. it sometime fails.
  98             // To prevent failing to configure NOT scan keyboard during configuration
  99             if (usbConfiguration && usbInterruptIsReady()) {
 100                 keyboard_task();
 101             }
 102             vusb_transfer_keyboard();
 103         }
 104     }
 105 }