Ive spent a lot of trying trying to make this work. I have the stk500 i am using to program the atmega32. Then i put the chip on the protoboard where i have implemented a lot of different variations on the circuits trying to get this to work.
The micro is runinng at 16mhz. These are my Makefile settings:
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DEVICE = atmega32
F_CPU = 16000000 # in Hz
FUSE_L = 0x9f
FUSE_H = 0xc9And this are the ones from the .h"
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#define USB_CFG_IOPORTNAME D
#define USB_CFG_DMINUS_BIT 3
#define USB_CFG_DPLUS_BIT 2
The rest is all the same!
The current designis based on with-zener.png from the source distribution. This last one i had to accept some variations as i dont have all the exact part, ie:
- the 4u7 capacitor is replaced by to 10u capacitors in series (5u)
- the 27p capacitors for the cristar are replaced with 22p capacitors.
And thats it. All i get from doing `dmesg` is lots of:
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Jul 25 18:43:35 prometeo kernel: [94932.256165] hub 6-0:1.0: unable to enumerate USB device on port 1
Jul 25 18:43:35 prometeo kernel: [94932.504053] hub 6-0:1.0: unable to enumerate USB device on port 1
Jul 25 18:43:35 prometeo kernel: [94932.752153] hub 6-0:1.0: unable to enumerate USB device on port 1
Jul 25 18:43:35 prometeo kernel: [94933.000231] hub 6-0:1.0: unable to enumerate USB device on port 1
and when i reset i see:
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Jul 25 18:46:09 prometeo kernel: [95086.762985] hub 6-0:1.0: unable to enumerate USB device on port 1
Jul 25 18:46:09 prometeo kernel: [95087.008410] hub 6-0:1.0: unable to enumerate USB device on port 1
Jul 25 18:46:10 prometeo kernel: [95087.312042] usb 6-1: new low speed USB device using uhci_hcd and address 119
Jul 25 18:46:10 prometeo kernel: [95087.432056] usb 6-1: device descriptor read/64, error -71
Jul 25 18:46:10 prometeo kernel: [95087.656031] usb 6-1: device descriptor read/64, error -71
Jul 25 18:46:10 prometeo kernel: [95087.876525] usb 6-1: new low speed USB device using uhci_hcd and address 120
Jul 25 18:46:10 prometeo kernel: [95087.998014] usb 6-1: device descriptor read/64, error -71
Jul 25 18:46:10 prometeo kernel: [95088.164075] hub 6-0:1.0: unable to enumerate USB device on port 1
Jul 25 18:46:10 prometeo kernel: [95088.496054] hub 6-0:1.0: unable to enumerate USB device on port 1
lsusb of course shows nothing. this is using ubuntu 9.10.
And this is the code from my main file:
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usbMsgLen_t usbFunctionSetup(uchar data[8])
{
return 0; /* default for not implemented requests: return no data back to host */
}
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.
*/
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();
for(;;){ /* main event loop */
wdt_reset();
usbPoll();
}
return 0;
}My next step is to replace the parts that dont match exactly the ones in the schematics, but ive tried many variations and many designs (eg, metaboard) and i cant get this to work with this micro.
So, do you guys have any idea what could be going on?
