Updated all host mode demos and projects to use the EVENT_USB_Host_DeviceEnumerationComplete() event callback for device configuration instead of manual host state machine manipulations in the main application task.

Added new USB_Host_ConfigurationNumber global variable to indicate the selected configuration in an attached device.

Renamed global state variables that are specific to a certain USB mode to clearly indicate which mode the variable relates to, by changing the USB_* prefix to USB_Device_* or USB_Host_*.

Removed the HOST_STATE_WaitForDeviceRemoval and HOST_STATE_Suspended host state machine states, as these are no longer required.

Altered the USB_Host_SetDeviceConfiguration() function to update the new USB_Host_ConfigurationNumber global as required.

Moved out the Host mode standard request convenience/helper functions from the architecture specific Host driver files to the architecture agnostic HostStandardReq.c driver file.

1 files changed, 37 insertions, 57 deletions

diff --git a/Demos/Host/LowLevel/GenericHIDHost/GenericHIDHost.c b/Demos/Host/LowLevel/GenericHIDHost/GenericHIDHost.c
index 671fa4833..720ad03e7 100644
--- a/Demos/Host/LowLevel/GenericHIDHost/GenericHIDHost.c
+++ b/Demos/Host/LowLevel/GenericHIDHost/GenericHIDHost.c
@@ -50,7 +50,8 @@ int main(void)
 
 	for (;;)
 	{
-		HID_Host_Task();
+		ReadNextReport();
+		
 		USB_USBTask();
 	}
 }
@@ -97,6 +98,35 @@ void EVENT_USB_Host_DeviceUnattached(void)
  */
 void EVENT_USB_Host_DeviceEnumerationComplete(void)
 {
+	puts_P(PSTR("Getting Config Data.\r\n"));
+
+	uint8_t ErrorCode;
+
+	/* Get and process the configuration descriptor data */
+	if ((ErrorCode = ProcessConfigurationDescriptor()) != SuccessfulConfigRead)
+	{
+		if (ErrorCode == ControlError)
+		  puts_P(PSTR(ESC_FG_RED "Control Error (Get Configuration).\r\n"));
+		else
+		  puts_P(PSTR(ESC_FG_RED "Invalid Device.\r\n"));
+
+		printf_P(PSTR(" -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
+
+		LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
+		return;
+	}
+
+	/* Set the device configuration to the first configuration (rarely do devices use multiple configurations) */
+	if ((ErrorCode = USB_Host_SetDeviceConfiguration(1)) != HOST_SENDCONTROL_Successful)
+	{
+		printf_P(PSTR(ESC_FG_RED "Control Error (Set Configuration).\r\n"
+		                         " -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
+
+		LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
+		return;
+	}
+
+	puts_P(PSTR("HID Device Enumerated.\r\n"));
 	LEDs_SetAllLEDs(LEDMASK_USB_READY);
 }
 
@@ -131,6 +161,9 @@ void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode,
  */
 void ReadNextReport(void)
 {
+	if (USB_HostState != HOST_STATE_Configured)
+	  return;
+
 	/* Select and unfreeze HID data IN pipe */
 	Pipe_SelectPipe(HID_DATA_IN_PIPE);
 	Pipe_Unfreeze();
@@ -178,6 +211,9 @@ void WriteNextReport(uint8_t* ReportOUTData,
                      const uint8_t ReportType,
                      uint16_t ReportLength)
 {
+	if (USB_HostState != HOST_STATE_Configured)
+	  return;
+
 	/* Select the HID data OUT pipe */
 	Pipe_SelectPipe(HID_DATA_OUT_PIPE);
 
@@ -229,59 +265,3 @@ void WriteNextReport(uint8_t* ReportOUTData,
 	}
 }
 
-/** Task to set the configuration of the attached device after it has been enumerated, and to read and process
- *  HID reports from the device and to send reports if desired.
- */
-void HID_Host_Task(void)
-{
-	uint8_t ErrorCode;
-
-	/* Switch to determine what user-application handled host state the host state machine is in */
-	switch (USB_HostState)
-	{
-		case HOST_STATE_Addressed:
-			puts_P(PSTR("Getting Config Data.\r\n"));
-
-			/* Get and process the configuration descriptor data */
-			if ((ErrorCode = ProcessConfigurationDescriptor()) != SuccessfulConfigRead)
-			{
-				if (ErrorCode == ControlError)
-				  puts_P(PSTR(ESC_FG_RED "Control Error (Get Configuration).\r\n"));
-				else
-				  puts_P(PSTR(ESC_FG_RED "Invalid Device.\r\n"));
-
-				printf_P(PSTR(" -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
-
-				/* Indicate error status */
-				LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
-
-				/* Wait until USB device disconnected */
-				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
-				break;
-			}
-
-			/* Set the device configuration to the first configuration (rarely do devices use multiple configurations) */
-			if ((ErrorCode = USB_Host_SetDeviceConfiguration(1)) != HOST_SENDCONTROL_Successful)
-			{
-				printf_P(PSTR(ESC_FG_RED "Control Error (Set Configuration).\r\n"
-				                         " -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
-
-				/* Indicate error status */
-				LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
-
-				/* Wait until USB device disconnected */
-				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
-				break;
-			}
-
-			puts_P(PSTR("HID Device Enumerated.\r\n"));
-
-			USB_HostState = HOST_STATE_Configured;
-			break;
-		case HOST_STATE_Configured:
-			ReadNextReport();
-
-			break;
-	}
-}
-