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biomed12
Joined: 05 Feb 2016
Posts: 33
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| [USB]Windows doesn't recognize the 18f4550 |
 Posted: Mon Sep 19, 2016 5:35 pm |
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Hello,
I want to use USB communication to communicate my 18f4550 and PC. I used the project wizard to create a project. Codes and header files here:
1-main.h file
| Code: |
#include <18F4550.h>
#device ADC=10
#FUSES NOWDT,XTPLL,PLL12 //No Watch Dog Timer
#use delay(clock=48MHz,crystal=4MHz,USB_FULL)
#define USB_CONFIG_VID 0x2405
#define USB_CONFIG_PID 0x000B
#define USB_CONFIG_BUS_POWER 500
#define USB_STRINGS_OVERWRITTEN
char USB_STRING_DESC_OFFSET[]={0,4,16};
char const USB_STRING_DESC[]={
//string 0 - language
4, //length of string index
0x03, //descriptor type (STRING)
0x09,0x04, //Microsoft Defined for US-English
//string 1 - manufacturer
12, //length of string index
0x03, //descriptor type (STRING)
'K',0,
'i',0,
'r',0,
'a',0,
'z',0,
//string 2 - product
28, //length of string index
0x03, //descriptor type (STRING)
'M',0,
'e',0,
'd',0,
'i',0,
'c',0,
'a',0,
'l',0,
'S',0,
'e',0,
'r',0,
'v',0,
'e',0,
'r',0
};
#define USB_CONFIG_HID_TX_SIZE 63
#define USB_CONFIG_HID_RX_SIZE 63
#include <pic18_usb.h>
#include <usb_desc_hid.h>
#include <usb.c>
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main.c file
| Code: |
#include <main.h>
/* TODO: Use usb_put_packet() to transmit data to USB HID,
using USB_HID_ENDPONT for the endpoint and the payload size
needs to match USB_CONFIG_HID_TX_SIZE. Use usb_get_packet()
to read incomming data, using USB_HID_ENDPOINT for the
endpoint. usb_enumerated() can be used to see if connected to
a host and ready to communicate. */
void main()
{
usb_init();
while(TRUE)
{
usb_task();
//TODO: User Code
}
}
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temtronic
Joined: 01 Jul 2010
Posts: 9204
Location: Greensville,Ontario
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| Posted: Tue Sep 20, 2016 5:02 am |
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step 1... try the working examples that CCS supplies !
step 2.. be SURE D+ and D- ARE connected properly !!
step3 .. ONCE 1 and 2 are 100% working THEN 'go out on your own' and cut code.
USB is NOT easy unlike good old 'RS-232'. You NEED to have everything right for it to work.
PS be sure to READ and do what's in the comments in the example code and drivers......it's the 'details' you need to understand and do....
yup, I prefer good old RS232...HATE USB..
Jay |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19447
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| Posted: Tue Sep 20, 2016 9:22 am |
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The .inf file for the CCS VID/PID is in a subdirectory off the examples folder. If Windows asks for a driver, it needs to be pointed at this. The string descriptor is meant to match the one in this file, or Windows will not accept it. The file itself, has to be approved by MS to be accepted, and if you change the descriptor, it will no longer match the ID stored in the security info.....
You can manually modify the file, but then Windows will always complain that the driver is not approved. |
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biomed12
Joined: 05 Feb 2016
Posts: 33
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| Posted: Tue Sep 20, 2016 2:33 pm |
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| temtronic wrote: | step 1... try the working examples that CCS supplies !
step 2.. be SURE D+ and D- ARE connected properly !!
step3 .. ONCE 1 and 2 are 100% working THEN 'go out on your own' and cut code.
USB is NOT easy unlike good old 'RS-232'. You NEED to have everything right for it to work.
PS be sure to READ and do what's in the comments in the example code and drivers......it's the 'details' you need to understand and do....
yup, I prefer good old RS232...HATE USB..
Jay |
Dear Jay,
I definitely agree with you about RS-232 but I have to accomplish this peripheral to my MCU-devices to make it more efficient. As you know RS-232 ports no longer exist in modern computers. I don't want to use any additional peripheral no longer.
I think this problem related to win10. I will install win7 and try to solve problem for win10.
Thanks. |
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temtronic
Joined: 01 Jul 2010
Posts: 9204
Location: Greensville,Ontario
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| Posted: Tue Sep 20, 2016 2:44 pm |
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As Mr T points out, you need to give Windows (any version +-) the correct information and it will work. I used the CCS examples on XP pro and home without problems...
Nowadays I don't use the 4550 for several reasons...
Jay |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19447
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| Posted: Wed Sep 21, 2016 1:41 am |
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As I have already pointed out the problem is security.
Windows10 (and the later releases of W7, to a slightly lesser extent), will now only allow 'secured' drivers to be used. CCS supply one for their VID/PID/Name combination, but you are changing the name, which means the security certificate is invalid.....
If you want your own name, you will need to buy a PID/VID combination, and generate a new .inf file to match this, and then get a security certificate for this.
Otherwise just use the CCS example name. |
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