I have been working on for some time a USB keyboard with the PIC18F4550. I am using MikroC PRO for PIC and have started working with their example of HID write that they have. Using this example I can open the HID terminal in mikroC and see the device detect and the data being written. I followed the steps here:
http://helmpcb.com/electronics/usb-joystick
If I use the joystick.hid from the HID descriptor tool and follow the other steps it gets detected in the HID terminal of mikroC. However, when I use the keybrd.hid from the HID descriptor and follow the same method it does not detect in the HID terminal. The PC makes the sound to indicate that something new has been detected, but nothing shows up on the HID terminal.
Here is my descriptor code:
Any ideas what is happening differently between the joystick and keyboard? Any help to get this detect is appreciated. I know this is just the first step, but a major one to get going on my pic keyboard emulator.
(code too long and continuing on next post)
Thanks!
http://helmpcb.com/electronics/usb-joystick
If I use the joystick.hid from the HID descriptor tool and follow the other steps it gets detected in the HID terminal of mikroC. However, when I use the keybrd.hid from the HID descriptor and follow the same method it does not detect in the HID terminal. The PC makes the sound to indicate that something new has been detected, but nothing shows up on the HID terminal.
Here is my descriptor code:
Rich (BB code):
//******************************************************************************
//
// File Version 1.01
//
//******************************************************************************
#include "Definit.h"
#include "VARs.h"
//******************************************************************************
// The number of bytes in each report,
// calculated from Report Size and Report Count in the report descriptor
//******************************************************************************
unsigned char const HID_INPUT_REPORT_BYTES = 1;
unsigned char const HID_OUTPUT_REPORT_BYTES = 1;
unsigned char const HID_FEATURE_REPORT_BYTES = 2;
//******************************************************************************
// Byte constants
//******************************************************************************
unsigned char const NUM_ENDPOINTS = 2;
unsigned char const ConfigDescr_wTotalLength = USB_CONFIG_DESCRIPTOR_LEN + USB_INTERF_DESCRIPTOR_LEN + USB_HID_DESCRIPTOR_LEN + (NUM_ENDPOINTS * USB_ENDP_DESCRIPTOR_LEN);
unsigned char const HID_ReportDesc_len = 63;
unsigned char const Low_HID_ReportDesc_len = HID_ReportDesc_len;
unsigned char const High_HID_ReportDesc_len = HID_ReportDesc_len >> 8;
unsigned char const Low_HID_PACKET_SIZE = HID_PACKET_SIZE;
unsigned char const High_HID_PACKET_SIZE = HID_PACKET_SIZE >> 8;
// Descriptor Tables
unsigned char const DescTables[] = {
// Device Descriptor
USB_DEVICE_DESCRIPTOR_LEN, 0, // bLength - Length of Device descriptor (always 0x12)
USB_DEVICE_DESCRIPTOR_TYPE, 0, // bDescriptorType - 1 = DEVICE descriptor
0x00, 0, // bcdUSB - USB revision 2.00 (low byte)
0x02, 0, // (high byte)
0x00, 0, // bDeviceClass - Zero means each interface operates independently (class code in the interface descriptor)
0x00, 0, // bDeviceSubClass
0x00, 0, // bDeviceProtocol
EP0_PACKET_SIZE, 0, // bMaxPacketSize0 - maximum size of a data packet for a control transfer over EP0
0x34, 0, // idVendor - Vendor ID (low byte)
0x12, 0, // (high byte)
0x01, 0, // idProduct - Product ID (low byte)
0x00, 0, // (high byte)
0x01, 0, // bcdDevice - ( low byte)
0x00, 0, // (high byte)
0x01, 0, // iManufacturer - String1
0x02, 0, // iProduct - String2
0x00, 0, // iSerialNumber - ( None )
0x01, 0, // bNumConfigurations - 1
// Configuration Descriptor
USB_CONFIG_DESCRIPTOR_LEN, 0, // bLength - Length of Configuration descriptor (always 0x09)
USB_CONFIG_DESCRIPTOR_TYPE, 0, // bDescriptorType - 2 = CONFIGURATION descriptor
ConfigDescr_wTotalLength, 0, // wTotalLength - Total length of this config. descriptor plus the interface and endpoint descriptors that are part of the configuration.
0x00, 0, // ( high byte)
0x01, 0, // bNumInterfaces - Number of interfaces
0x01, 0, // bConfigurationValue - Configuration Value
0x00, 0, // iConfiguration - String Index for this configuration ( None )
0xA0, 0, // bmAttributes - attributes - "Bus powered" and "Remote wakeup"
50, 0, // MaxPower - bus-powered draws 50*2 mA from the bus.
// Interface Descriptor
USB_INTERF_DESCRIPTOR_LEN, 0, // bLength - Length of Interface descriptor (always 0x09)
USB_INTERFACE_DESCRIPTOR_TYPE, 0, // bDescriptorType - 4 = INTERFACE descriptor
0x00, 0, // bInterfaceNumber - Number of interface, 0 based array
0x00, 0, // bAlternateSetting - Alternate setting
NUM_ENDPOINTS, 0, // bNumEndPoints - Number of endpoints used in this interface
0x03, 0, // bInterfaceClass - assigned by the USB
0x00, 0, // bInterfaceSubClass - Not A boot device
0x00, 0, // bInterfaceProtocol - none
0x00, 0, // iInterface - Index to string descriptor that describes this interface ( None )
// HID Descriptor
USB_HID_DESCRIPTOR_LEN, 0, // bLength - Length of HID descriptor (always 0x09)
USB_HID_DESCRIPTOR_TYPE, 0, // bDescriptorType - 0x21 = HID descriptor
0x01, 0, // HID class release number (1.01)
0x01, 0,
0x00, 0, // Localized country code (none)
0x01, 0, // # of HID class descriptor to follow (1)
0x22, 0, // Report descriptor type (HID)
Low_HID_ReportDesc_len, 0,
High_HID_ReportDesc_len, 0,
// EP1_RX Descriptor
USB_ENDP_DESCRIPTOR_LEN, 0, // bLength - length of descriptor (always 0x07)
USB_ENDPOINT_DESCRIPTOR_TYPE, 0, // bDescriptorType - 5 = ENDPOINT descriptor
0x81, 0, // bEndpointAddress - In, EP1
USB_ENDPOINT_TYPE_INTERRUPT, 0, // bmAttributes - Endpoint Type - Interrupt
Low_HID_PACKET_SIZE, 0, // wMaxPacketSize - max packet size - low order byte
High_HID_PACKET_SIZE, 0, // - max packet size - high order byte
1, 0, // bInterval - polling interval (1 ms)
// EP1_TX Descriptor
USB_ENDP_DESCRIPTOR_LEN, 0, // bLength - length of descriptor (always 0x07)
USB_ENDPOINT_DESCRIPTOR_TYPE, 0, // bDescriptorType - 5 = ENDPOINT descriptor
0x01, 0, // bEndpointAddress - Out, EP1
USB_ENDPOINT_TYPE_INTERRUPT, 0, // bmAttributes - Endpoint Type - Interrupt
Low_HID_PACKET_SIZE, 0, // wMaxPacketSize - max packet size - low order byte
High_HID_PACKET_SIZE, 0, // - max packet size - high order byte
1, 0, // bInterval - polling interval (1 ms)
(code too long and continuing on next post)
Thanks!