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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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18
Demos/Host/LowLevel/StillImageHost/Lib/StillImageCommands.c
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@ -108,28 +108,28 @@ uint8_t SImage_ReceiveEventHeader(void)
*/
uint8_t SImage_ReceiveBlockHeader(void)
{
uint16_t TimeoutMSRem = COMMAND_DATA_TIMEOUT_MS;
uint16_t TimeoutMSRem = COMMAND_DATA_TIMEOUT_MS;
uint16_t PreviousFrameNumber = USB_Host_GetFrameNumber();
/* Unfreeze the data IN pipe */
Pipe_SelectPipe(SIMAGE_DATA_IN_PIPE);
Pipe_Unfreeze();
/* Wait until data received on the IN pipe */
while (!(Pipe_IsReadWriteAllowed()))
while (!(Pipe_IsINReceived()))
{
uint16_t CurrentFrameNumber = USB_Host_GetFrameNumber();
/* Check to see if a new frame has been issued (1ms elapsed) */
if (USB_INT_HasOccurred(USB_INT_HSOFI))
if (CurrentFrameNumber != PreviousFrameNumber)
{
/* Clear the flag and decrement the timeout period counter */
USB_INT_Clear(USB_INT_HSOFI);
/* Save the new frame number and decrement the timeout period */
PreviousFrameNumber = CurrentFrameNumber;
TimeoutMSRem--;
/* Check to see if the timeout period for the command has elapsed */
if (!(TimeoutMSRem))
{
/* Return error code */
return PIPE_RWSTREAM_Timeout;
}
return PIPE_RWSTREAM_Timeout;
}
Pipe_Freeze();