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Add explicit guards to all device mode tasks to ensure the device is connected and configured before running the task, to prevent any user tasks from locking up the main USB task if the device has not been properly configured.

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This commit is contained in:
Dean Camera 2009-07-21 02:48:41 +00:00
parent bf50959b80
commit 67f390fe74
19 changed files with 245 additions and 216 deletions
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40
Demos/Device/LowLevel/Joystick/Joystick.c
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@ -181,28 +181,28 @@ bool GetNextReport(USB_JoystickReport_Data_t* ReportData)
/** Function to manage HID report generation and transmission to the host. */
void HID_Task(void)
{
/* Check if the USB System is connected to a Host */
if (USB_IsConnected)
/* Device must be connected and configured for the task to run */
if (!(USB_IsConnected) || !(USB_ConfigurationNumber))
return;
/* Select the Joystick Report Endpoint */
Endpoint_SelectEndpoint(JOYSTICK_EPNUM);
/* Check to see if the host is ready for another packet */
if (Endpoint_IsINReady())
{
/* Select the Joystick Report Endpoint */
Endpoint_SelectEndpoint(JOYSTICK_EPNUM);
/* Check to see if the host is ready for another packet */
if (Endpoint_IsINReady())
{
USB_JoystickReport_Data_t JoystickReportData;
/* Create the next HID report to send to the host */
GetNextReport(&JoystickReportData);
USB_JoystickReport_Data_t JoystickReportData;
/* Write Joystick Report Data */
Endpoint_Write_Stream_LE(&JoystickReportData, sizeof(JoystickReportData));
/* Create the next HID report to send to the host */
GetNextReport(&JoystickReportData);
/* Write Joystick Report Data */
Endpoint_Write_Stream_LE(&JoystickReportData, sizeof(JoystickReportData));
/* Finalize the stream transfer to send the last packet */
Endpoint_ClearIN();
/* Clear the report data afterwards */
memset(&JoystickReportData, 0, sizeof(JoystickReportData));
}
/* Finalize the stream transfer to send the last packet */
Endpoint_ClearIN();
/* Clear the report data afterwards */
memset(&JoystickReportData, 0, sizeof(JoystickReportData));
}
}