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authortmk <hasu@tmk-kbd.com>2014-11-29 20:47:15 +0900
committertmk <hasu@tmk-kbd.com>2015-01-15 17:08:48 +0900
commit20caf673d8ba7fb7675e2559bfebad6ddb9d6fd0 (patch)
treee1651c9a8734f33727e9da553cc712c6b51adbc6 /protocol/lufa
parent9179246a1d69024449829218aa7fb967d8ccc3f5 (diff)
Fix lufa sendchar() infinite wait loop
- FrameNumber is not updated when adapter powered - can be blocked in sendchar() when pluged into AC adapter
Diffstat (limited to 'protocol/lufa')
-rw-r--r--protocol/lufa/lufa.c36
1 files changed, 18 insertions, 18 deletions
diff --git a/protocol/lufa/lufa.c b/protocol/lufa/lufa.c
index ee15b7f455..3d6b3ea00c 100644
--- a/protocol/lufa/lufa.c
+++ b/protocol/lufa/lufa.c
@@ -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();