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Fix lufa sendchar() infinite wait loop

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- FrameNumber is not updated when adapter powered
- can be blocked in sendchar() when pluged into AC adapter
This commit is contained in:
tmk 2014-11-29 20:47:15 +09:00
parent 9179246a1d
commit 20caf673d8
2 changed files with 20 additions and 19 deletions
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3
keyboard/hhkb_rn42/rn42/main.c
View file

@ -17,8 +17,8 @@
static int8_t sendchar_func(uint8_t c)
{
sendchar(c); // LUFA
xmit(c); // SUART
sendchar(c); // LUFA
return 0;
}
@ -85,6 +85,7 @@ int main(void)
print("Keyboard start.\n");
while (1) {
while (USB_DeviceState == DEVICE_STATE_Suspended) {
print("[s]");
suspend_power_down();
if (USB_Device_RemoteWakeupEnabled && suspend_wakeup_condition()) {
USB_Device_SendRemoteWakeup();

36
protocol/lufa/lufa.c
View file

@ -148,6 +148,7 @@ static void Console_Task(void)
*/
void EVENT_USB_Device_Connect(void)
{
print("[C]");
/* For battery powered device */
if (!USB_IsInitialized) {
USB_Init();
@ -157,6 +158,7 @@ void EVENT_USB_Device_Connect(void)
void EVENT_USB_Device_Disconnect(void)
{
print("[D]");
/* For battery powered device */
/* TODO: This doesn't work. After several plug in/outs can not be enumerated.
if (USB_IsInitialized) {
@ -169,10 +171,12 @@ void EVENT_USB_Device_Disconnect(void)
void EVENT_USB_Device_Reset(void)
{
print("[R]");
}
void EVENT_USB_Device_Suspend()
{
print("[S]");
#ifdef SLEEP_LED_ENABLE
sleep_led_enable();
#endif
@ -180,6 +184,7 @@ void EVENT_USB_Device_Suspend()
void EVENT_USB_Device_WakeUp()
{
print("[W]");
suspend_wakeup_init();
#ifdef SLEEP_LED_ENABLE
@ -489,37 +494,28 @@ int8_t sendchar(uint8_t c)
uint8_t ep = Endpoint_GetCurrentEndpoint();
Endpoint_SelectEndpoint(CONSOLE_IN_EPNUM);
if (!Endpoint_IsEnabled() || !Endpoint_IsConfigured()) {
Endpoint_SelectEndpoint(ep);
return -1;
goto ERROR_EXIT;
}
if (timeouted && !Endpoint_IsReadWriteAllowed()) {
Endpoint_SelectEndpoint(ep);
return - 1;
goto ERROR_EXIT;
}
timeouted = false;
uint8_t timeout = SEND_TIMEOUT;
uint16_t prevFN = USB_Device_GetFrameNumber();
while (!Endpoint_IsReadWriteAllowed()) {
switch (USB_DeviceState) {
case DEVICE_STATE_Unattached:
case DEVICE_STATE_Suspended:
return -1;
if (USB_DeviceState != DEVICE_STATE_Configured) {
goto ERROR_EXIT;
}
if (Endpoint_IsStalled()) {
Endpoint_SelectEndpoint(ep);
return -1;
goto ERROR_EXIT;
}
if (prevFN != USB_Device_GetFrameNumber()) {
if (!(timeout--)) {
timeouted = true;
Endpoint_SelectEndpoint(ep);
return -1;
}
prevFN = USB_Device_GetFrameNumber();
if (!(timeout--)) {
timeouted = true;
goto ERROR_EXIT;
}
_delay_ms(1);
}
Endpoint_Write_8(c);
@ -530,6 +526,9 @@ int8_t sendchar(uint8_t c)
Endpoint_SelectEndpoint(ep);
return 0;
ERROR_EXIT:
Endpoint_SelectEndpoint(ep);
return -1;
}
#else
int8_t sendchar(uint8_t c)
@ -587,6 +586,7 @@ int main(void)
print("Keyboard start.\n");
while (1) {
while (USB_DeviceState == DEVICE_STATE_Suspended) {
print("[s]");
suspend_power_down();
if (USB_Device_RemoteWakeupEnabled && suspend_wakeup_condition()) {
USB_Device_SendRemoteWakeup();