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Added new USB_Device_GetFrameNumber() and USB_Host_GetFrameNumber() functions to retrieve the current USB frame number.

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Added new USB_Host_EnableSOFEvents(), USB_Host_DisableSOFEvents() and EVENT_USB_Host_StartOfFrame() for the user application handling of USB Start of Frame events while in USB Host mode.

Changed over all demos, drivers and internal functions to use the current frame number over the Start of Frame flag where possible to free up the Start of Frame flag for interrupt use in the user application.
This commit is contained in:
Dean Camera 2010-09-05 07:11:53 +00:00
parent 0174d8ea70
commit 18cbd31605
12 changed files with 126 additions and 40 deletions
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20
LUFA/Drivers/USB/LowLevel/Host.c
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@ -194,16 +194,19 @@ void USB_Host_ProcessNextHostState(void)
uint8_t USB_Host_WaitMS(uint8_t MS)
{
bool BusSuspended = USB_Host_IsBusSuspended();
uint8_t ErrorCode = HOST_WAITERROR_Successful;
bool BusSuspended = USB_Host_IsBusSuspended();
uint8_t ErrorCode = HOST_WAITERROR_Successful;
uint16_t PreviousFrameNumber = USB_Host_GetFrameNumber();
USB_Host_ResumeBus();
while (MS)
{
if (USB_INT_HasOccurred(USB_INT_HSOFI))
uint16_t CurrentFrameNumber = USB_Host_GetFrameNumber();
if (CurrentFrameNumber != PreviousFrameNumber)
{
USB_INT_Clear(USB_INT_HSOFI);
PreviousFrameNumber = CurrentFrameNumber;
MS--;
}
@ -245,11 +248,13 @@ static void USB_Host_ResetDevice(void)
USB_Host_ResetBus();
while (!(USB_Host_IsBusResetComplete()));
USB_Host_ResumeBus();
USB_INT_Clear(USB_INT_HSOFI);
bool HSOFIEnabled = USB_INT_IsEnabled(USB_INT_HSOFI);
USB_INT_Disable(USB_INT_HSOFI);
USB_INT_Clear(USB_INT_HSOFI);
for (uint8_t MSRem = 10; MSRem != 0; MSRem--)
{
/* Workaround for powerless-pull-up devices. After a USB bus reset,
@ -267,6 +272,9 @@ static void USB_Host_ResetDevice(void)
_delay_ms(1);
}
if (HSOFIEnabled)
USB_INT_Enable(USB_INT_HSOFI);
if (BusSuspended)
USB_Host_SuspendBus();