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Date:      Thu, 7 Apr 2022 14:12:34 +0200
From:      Hans Petter Selasky <hps@selasky.org>
To:        Axel Rau <Axel.Rau@chaos1.de>, hardware@freebsd.org
Subject:   Re: timeouts on USB ISP programmer
Message-ID:  <34a747ea-2ee5-660f-71c6-dc00d5de337f@selasky.org>
In-Reply-To: <3A781DFA-1E2C-41A5-8053-C90A806244DC@Chaos1.DE>
References:  <3A781DFA-1E2C-41A5-8053-C90A806244DC@Chaos1.DE>

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On 4/7/22 13:33, Axel Rau wrote:
> Hi all,
> 
> my DIAMEX-AVR-USB gets timeouts while talking to the target:
> - - -
> root@home2l:/ #	avrdude -c stk500v2 -p t85 -P /dev/cuau1 -t -v -i 10
> 
> avrdude: Version 6.4
>           Copyright (c) Brian Dean, http://www.bdmicro.com/
>           Copyright (c) Joerg Wunsch
> 
>           System wide configuration file is "/usr/local/etc/avrdude.conf"
>           User configuration file is "/root/.avrduderc"
>           User configuration file does not exist or is not a regular file, skipping
> 
>           Using Port                    : /dev/cuau1
>           Using Programmer              : stk500v2
>           Setting isp clock delay        :  10
> avrdude: stk500v2_ReceiveMessage(): timeout
> avrdude: stk500v2_ReceiveMessage(): timeout
> avrdude: stk500v2_ReceiveMessage(): timeout
> avrdude: stk500v2_ReceiveMessage(): timeout
> avrdude: stk500v2_ReceiveMessage(): timeout
> avrdude: stk500v2_ReceiveMessage(): timeout
> avrdude: stk500v2_getsync(): timeout communicating with programmer
>           AVR Part                      : ATtiny85
>           Chip Erase delay              : 4500 us
>           PAGEL                         : P00
>           BS2                           : P00
>           RESET disposition             : possible i/o
>           RETRY pulse                   : SCK
>           serial program mode           : yes
>           parallel program mode         : yes
>           Timeout                       : 200
>           StabDelay                     : 100
>           CmdexeDelay                   : 25
>           SyncLoops                     : 32
>           ByteDelay                     : 0
>           PollIndex                     : 3
>           PollValue                     : 0x53
>           Memory Detail                 :
> 
>                                    Block Poll               Page                       Polled
>             Memory Type Mode Delay Size  Indx Paged  Size   Size #Pages MinW  MaxW   ReadBack
>             ----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
>             eeprom        65     6     4    0 no        512    4      0  4000  4500 0xff 0xff
>             flash         65     6    32    0 yes      8192   64    128  4500  4500 0xff 0xff
>             signature      0     0     0    0 no          3    1      0     0     0 0x00 0x00
>             lock           0     0     0    0 no          1    1      0  9000  9000 0x00 0x00
>             lfuse          0     0     0    0 no          1    1      0  9000  9000 0x00 0x00
>             hfuse          0     0     0    0 no          1    1      0  9000  9000 0x00 0x00
>             efuse          0     0     0    0 no          1    1      0  9000  9000 0x00 0x00
>             calibration    0     0     0    0 no          1    1      0     0     0 0x00 0x00
> 
>           Programmer Type : STK500V2
>           Description     : Atmel STK500 Version 2.x firmware
>           Programmer Model: Unknown
> avrdude: stk500v2_ReceiveMessage(): timeout
> . . .
> avrdude: stk500v2_getsync(): timeout communicating with programmer
> avrdude: stk500v2_command(): failed miserably to execute command 0x11
> avrdude: stk500v2_disable(): failed to leave programming mode
> 
> root@home2l:/ #	usbconfig
> ugen0.1: <0x8086 XHCI root HUB> at usbus0, cfg=0 md=HOST spd=SUPER (5.0Gbps) pwr=SAVE (0mA)
> ugen0.2: <vendor 0x046a product 0x0023> at usbus0, cfg=0 md=HOST spd=LOW (1.5Mbps) pwr=ON (100mA)
> ugen0.3: <Logitech USB Optical Mouse> at usbus0, cfg=0 md=HOST spd=LOW (1.5Mbps) pwr=ON (100mA)
> ugen0.4: <ERFOS AVR-ISP2> at usbus0, cfg=0 md=HOST spd=FULL (12Mbps) pwr=ON (500mA)
> root@home2l:/ #	usbconfig -d ugen0.4 dump_device_desc
> ugen0.4: <ERFOS AVR-ISP2> at usbus0, cfg=0 md=HOST spd=FULL (12Mbps) pwr=ON (500mA)
> 
>    bLength = 0x0012
>    bDescriptorType = 0x0001
>    bcdUSB = 0x0200
>    bDeviceClass = 0x0002  <Communication device>
>    bDeviceSubClass = 0x0000
>    bDeviceProtocol = 0x0000
>    bMaxPacketSize0 = 0x0040
>    idVendor = 0x16c0
>    idProduct = 0x2a9b
>    bcdDevice = 0x4340
>    iManufacturer = 0x0001  <ERFOS>
>    iProduct = 0x0002  <AVR-ISP2>
>    iSerialNumber = 0x0003  <19331-49101-552>
>    bNumConfigurations = 0x0001
> - - -
> 
> Loading uftdi.ko did not help.
> 

Try:

usbdump -i usbus0 -f 4 -s 65536 -vvv

To see exactly what is going on.

Maybe some other kernel driver is attached at the same time, consuming 
the response from the programmer.

BTW:

/dev/cuau1 is not a USB port!

Maybe try:

/dev/cuaU1

--HPS




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