v-usb + hidapi
Posted: Fri Dec 28, 2012 8:18 pm
Hi, all! Sorry for my english!
I have a problem. I can't read input report from hid device. I take hid-test example project as a base. This is a code for PC (hidapi library, hidtest.cpp)
this is code for avr (mega8)
but when I run program from PC, the program write in console: waiting..., no data read from devace.
I have a problem. I can't read input report from hid device. I take hid-test example project as a base. This is a code for PC (hidapi library, hidtest.cpp)
Code: Select all
/*******************************************************
Windows HID simplification
Alan Ott
Signal 11 Software
8/22/2009
Copyright 2009, All Rights Reserved.
This contents of this file may be used by anyone
for any reason without any conditions and may be
used as a starting point for your own applications
which use HIDAPI.
********************************************************/
#include <stdio.h>
#include <wchar.h>
#include <string.h>
#include <stdlib.h>
#include "hidapi.h"
#include <windows.h>
int main(int argc, char* argv[])
{
int res;
unsigned char buf[9];
hid_device *handle;
int i;
#ifdef WIN32
UNREFERENCED_PARAMETER(argc);
UNREFERENCED_PARAMETER(argv);
#endif
handle = hid_open(0x16c0, 0x05df, NULL);
if (!handle) {
printf("unable to open device\n");
return 1;
}
hid_set_nonblocking(handle, 1);
res = 0;
while (res == 0) {
res = hid_read(handle, buf, sizeof(buf));
if (res == 0)
printf("waiting...\n");
if (res < 0)
printf("Unable to read()\n");
Sleep(1000);
}
printf("Data read:\n ");
// Print out the returned buffer.
for (i = 0; i < res; i++)
printf("%02hhx ", buf[i]);
printf("\n");
hid_close(handle);
/* Free static HIDAPI objects. */
hid_exit();
system("pause");
return 0;
}
this is code for avr (mega8)
Code: Select all
/* Name: main.c
* Project: hid-data, example how to use HID for data transfer
* Author: Christian Starkjohann
* Creation Date: 2008-04-11
* Tabsize: 4
* Copyright: (c) 2008 by OBJECTIVE DEVELOPMENT Software GmbH
* License: GNU GPL v2 (see License.txt), GNU GPL v3 or proprietary (CommercialLicense.txt)
*/
/*
This example should run on most AVRs with only little changes. No special
hardware resources except INT0 are used. You may have to change usbconfig.h for
different I/O pins for USB. Please note that USB D+ must be the INT0 pin, or
at least be connected to INT0 as well.
*/
#include <avr/io.h>
#include <avr/wdt.h>
#include <avr/interrupt.h> /* for sei() */
#include <util/delay.h> /* for _delay_ms() */
#include <avr/eeprom.h>
#include <avr/pgmspace.h> /* required by usbdrv.h */
#include "usbdrv.h"
#include "oddebug.h" /* This is also an example for using debug macros */
/* ------------------------------------------------------------------------- */
/* ----------------------------- USB interface ----------------------------- */
/* ------------------------------------------------------------------------- */
PROGMEM const char usbHidReportDescriptor[32] = { /* USB report descriptor */
0x06, 0x9c, 0xff, /* Usage Page (Vendor Defined) */
0x09, 0x01, /* Usage (Vendor Defined) */
0xa1, 0x01, /* Collection (Vendor Defined) */
0x09, 0x02, /* Usage (Vendor Defined) */
0x75, 0x08, /* Report Size (8) */
0x95, 0x08, /* Report Count (8) */
0x15, 0x80, /* Logical Minimum (-128) */
0x25, 0x7F, /* Logical Maximum (127) */
0x81, 0x02, /* Input (Data, Variable, Absolute) */
0x09, 0x03, /* Usage (Vendor Defined) */
0x75, 0x08, /* Report Size (8) */
0x95, 0x08, /* Report Count (8) */
0x15, 0x00, /* Logical Minimum (0) */
0x25, 0xff, /* Logical Maximum (255) */
0x91, 0x02, /* Output (Data, Variable, Absolute) */
0xc0 /* End Collection */
};
/* Since we define only one feature report, we don't use report-IDs (which
* would be the first byte of the report). The entire report consists of 128
* opaque data bytes.
*/
/* ------------------------------------------------------------------------- */
/* usbFunctionRead() is called when the host requests a chunk of data from
* the device. For more information see the documentation in usbdrv/usbdrv.h.
*/
uchar usbFunctionRead(uchar *data, uchar len)
{
data[1] = 0x01;
data[2] = 0x02;
data[3] = 0x03;
data[4] = 0x04;
return 8;
}
/* usbFunctionWrite() is called when the host sends a chunk of data to the
* device. For more information see the documentation in usbdrv/usbdrv.h.
*/
uchar usbFunctionWrite(uchar *data, uchar len)
{
return 1; /* end of transfer */
}
/* ------------------------------------------------------------------------- */
usbMsgLen_t usbFunctionSetup(uchar data[8])
{
usbRequest_t *rq = (void *)data;
if((rq->bmRequestType & USBRQ_TYPE_MASK) == USBRQ_TYPE_CLASS){ /* HID class request */
if(rq->bRequest == USBRQ_HID_GET_REPORT){ /* wValue: ReportType (highbyte), ReportID (lowbyte) */
/* since we have only one report type, we can ignore the report-ID */
return USB_NO_MSG; /* use usbFunctionRead() to obtain data */
}else if(rq->bRequest == USBRQ_HID_SET_REPORT){
/* since we have only one report type, we can ignore the report-ID */
return USB_NO_MSG; /* use usbFunctionWrite() to receive data from host */
}
}else{
/* ignore vendor type requests, we don't use any */
}
return 0;
}
/* ------------------------------------------------------------------------- */
int main(void)
{
uchar i;
wdt_enable(WDTO_1S);
/* Even if you don't use the watchdog, turn it off here. On newer devices,
* the status of the watchdog (on/off, period) is PRESERVED OVER RESET!
*/
/* RESET status: all port bits are inputs without pull-up.
* That's the way we need D+ and D-. Therefore we don't need any
* additional hardware initialization.
*/
odDebugInit();
DBG1(0x00, 0, 0); /* debug output: main starts */
usbInit();
usbDeviceDisconnect(); /* enforce re-enumeration, do this while interrupts are disabled! */
i = 0;
while(--i){ /* fake USB disconnect for > 250 ms */
wdt_reset();
_delay_ms(1);
}
usbDeviceConnect();
sei();
DBG1(0x01, 0, 0); /* debug output: main loop starts */
for(;;){ /* main event loop */
DBG1(0x02, 0, 0); /* debug output: main loop iterates */
wdt_reset();
usbPoll();
}
return 0;
}
/* ------------------------------------------------------------------------- */
but when I run program from PC, the program write in console: waiting..., no data read from devace.
