149 lines
3.4 KiB
C
149 lines
3.4 KiB
C
/* Name: main.c
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* Project: hid-mouse, a very simple HID example
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* Author: Christian Starkjohann
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* Creation Date: 2008-04-07
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* Tabsize: 4
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* Copyright: (c) 2008 by OBJECTIVE DEVELOPMENT Software GmbH
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* License: GNU GPL v2 (see License.txt), GNU GPL v3 or proprietary (CommercialLicense.txt)
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* This Revision: $Id: main.c 790 2010-05-30 21:00:26Z cs $
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*/
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#include <stdint.h>
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#include <avr/interrupt.h>
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#include <avr/power.h>
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#include <avr/wdt.h>
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#include <avr/sleep.h>
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#include <usbdrv/usbdrv.h>
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#include "vusb.h"
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#include "keyboard.h"
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#include "host.h"
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#include "timer.h"
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#include "debug.h"
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#include "suspend.h"
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#include "wait.h"
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#include "sendchar.h"
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/* This is from main.c of USBaspLoader */
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static void initForUsbConnectivity(void) {
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uint8_t i = 0;
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usbInit();
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/* enforce USB re-enumerate: */
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usbDeviceDisconnect(); /* do this while interrupts are disabled */
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while (--i) { /* fake USB disconnect for > 250 ms */
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wdt_reset();
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wait_ms(1);
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}
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usbDeviceConnect();
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}
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static inline void vusb_send_remote_wakeup(void) {
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cli();
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uint8_t ddr_orig = USBDDR;
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USBOUT |= (1 << USBMINUS);
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USBDDR = ddr_orig | USBMASK;
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USBOUT ^= USBMASK;
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wait_ms(25);
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USBOUT ^= USBMASK;
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USBDDR = ddr_orig;
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USBOUT &= ~(1 << USBMINUS);
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sei();
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}
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bool vusb_suspended = false;
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/** \brief Setup USB
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*
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* FIXME: Needs doc
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*/
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static void setup_usb(void) {
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initForUsbConnectivity();
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}
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uint16_t sof_timer = 0;
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void protocol_setup(void) {
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#if USB_COUNT_SOF
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sof_timer = timer_read();
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#endif
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#ifdef CLKPR
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// avoid unintentional changes of clock frequency in devices that have a
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// clock prescaler
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clock_prescale_set(clock_div_1);
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#endif
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}
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void protocol_pre_init(void) {
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setup_usb();
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sei();
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}
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void protocol_post_init(void) {
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host_set_driver(vusb_driver());
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wait_ms(50);
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}
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static inline bool should_do_suspend(void) {
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#if USB_COUNT_SOF
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if (usbSofCount != 0) {
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usbSofCount = 0;
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sof_timer = timer_read();
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vusb_suspended = false;
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} else {
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// Suspend when no SOF in 3ms-10ms(7.1.7.4 Suspending of USB1.1)
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if (!vusb_suspended && timer_elapsed(sof_timer) > 5) {
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vusb_suspended = true;
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}
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}
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#endif
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return vusb_suspended;
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}
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void protocol_pre_task(void) {
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#if !defined(NO_USB_STARTUP_CHECK)
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if (should_do_suspend()) {
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dprintln("suspending keyboard");
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while (should_do_suspend()) {
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suspend_power_down();
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if (suspend_wakeup_condition()) {
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vusb_send_remote_wakeup();
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# if USB_SUSPEND_WAKEUP_DELAY > 0
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// Some hubs, kvm switches, and monitors do
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// weird things, with USB device state bouncing
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// around wildly on wakeup, yielding race
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// conditions that can corrupt the keyboard state.
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//
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// Pause for a while to let things settle...
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wait_ms(USB_SUSPEND_WAKEUP_DELAY);
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# endif
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}
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}
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suspend_wakeup_init();
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}
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#endif
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}
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void protocol_keyboard_task(void) {
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usbPoll();
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// TODO: configuration process is inconsistent. it sometime fails.
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// To prevent failing to configure NOT scan keyboard during configuration
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if (usbConfiguration && usbInterruptIsReady()) {
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keyboard_task();
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}
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}
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void protocol_post_task(void) {
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// do nothing
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}
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