diff options
Diffstat (limited to 'Demos/Host/Incomplete/PrinterHost/PrinterHost.c')
| -rw-r--r-- | Demos/Host/Incomplete/PrinterHost/PrinterHost.c | 33 |
1 files changed, 28 insertions, 5 deletions
diff --git a/Demos/Host/Incomplete/PrinterHost/PrinterHost.c b/Demos/Host/Incomplete/PrinterHost/PrinterHost.c index 80fca259c..643f919c9 100644 --- a/Demos/Host/Incomplete/PrinterHost/PrinterHost.c +++ b/Demos/Host/Incomplete/PrinterHost/PrinterHost.c @@ -36,8 +36,6 @@ #include "PrinterHost.h"
-uint8_t PrinterProtocol;
-
int main(void)
{
@@ -150,12 +148,37 @@ void USB_Printer_Host(void) USB_HostState = HOST_STATE_WaitForDeviceRemoval;
break;
}
-
+
+ /* Some printers use alternate settings to determine the communication protocol used - if so, send a SetInterface
+ * request to switch to the interface alternate setting with the Bidirection protocol */
+ if (PrinterAltSetting)
+ {
+ USB_ControlRequest = (USB_Request_Header_t)
+ {
+ bmRequestType: (REQDIR_HOSTTODEVICE | REQTYPE_STANDARD | REQREC_INTERFACE),
+ bRequest: REQ_SetInterface,
+ wValue: PrinterAltSetting,
+ wIndex: PrinterInterfaceNumber,
+ wLength: 0,
+ };
+
+ if ((ErrorCode = USB_Host_SendControlRequest(NULL)) != HOST_SENDCONTROL_Successful)
+ {
+ puts_P(PSTR("Control Error (Set Interface).\r\n"));
+ printf_P(PSTR(" -- Error Code: %d\r\n"), ErrorCode);
+
+ /* Indicate error via status LEDs */
+ LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
+
+ /* Wait until USB device disconnected */
+ USB_HostState = HOST_STATE_WaitForDeviceRemoval;
+ break;
+ }
+ }
+
USB_HostState = HOST_STATE_Configured;
break;
case HOST_STATE_Configured:
- printf_P(PSTR("Printer Protocol: %d\r\n"), PrinterProtocol);
-
puts_P(PSTR("Retrieving Device ID...\r\n"));
Device_ID_String_t DeviceIDString;
|