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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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7
Demos/Device/LowLevel/MIDI/MIDI.c
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@ -116,16 +116,17 @@ void MIDI_Task(void)
{
static uint8_t PrevJoystickStatus;
/* Select the MIDI IN stream */
/* Device must be connected and configured for the task to run */
if (!(USB_IsConnected) || !(USB_ConfigurationNumber))
return;
Endpoint_SelectEndpoint(MIDI_STREAM_IN_EPNUM);
/* Check if endpoint is ready to be written to */
if (Endpoint_IsINReady())
{
uint8_t MIDICommand = 0;
uint8_t MIDIPitch;
/* Get current joystick mask, XOR with previous to detect joystick changes */
uint8_t JoystickStatus = Joystick_GetStatus();
uint8_t JoystickChanges = (JoystickStatus ^ PrevJoystickStatus);