2 Attachment(s)
Being puzzled by the avrdude error
I purchased a "usbasp" programmer from AliExpress for use with my ATtiny84A AVR devices（ATtiny84A - 8-bit AVR Microcontrollers）. This has the text "USBASP V2.0 LC Technology" screenprinted on the top of the PCB, and it looks very much like this:
Attachment 15268
I have a C232HM (FTDI)(C232HM-DDHSL-0 - FTDI, Future Technology Devices International Ltd - Smart Cables - Kynix Semiconductor) cable that I have been using as an avrdude programmer successfully for some time, so I know my AVR devices are working and that I'm using the right pins on the ATtiny84.
Unfortunately I have not been successful with this new programmer. After connecting VCC (with jumper J1 set for 5V), GND, MOSI, MISO, SCK and RESET (and triple-checking!), avrdude provides the following error:
Code:
$ avrdude -c usbasp -p attiny84 -vvvv
avrdude: Version 6.3, compiled on Sep 17 2016 at 02:19:28
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2014 Joerg Wunsch
System wide configuration file is "/usr/local/Cellar/avrdude/6.3/etc/avrdude.conf"
User configuration file is "/Users/me/.avrduderc"
User configuration file does not exist or is not a regular file, skipping
Using Port : usb
Using Programmer : usbasp
avrdude: usbasp_open("usb")
avrdude: seen device from vendor ->www.fischl.de<-
avrdude: seen product ->USBasp<-
AVR Part : ATtiny84
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
Block Poll Page Polled
Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW MaxW ReadBack
----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
flash 65 6 32 0 yes 8192 64 128 4500 4500 0xff 0xff
Block Poll Page Polled
Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW MaxW ReadBack
----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
signature 0 0 0 0 no 3 0 0 0 0 0x00 0x00
Block Poll Page Polled
Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW MaxW ReadBack
----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
lock 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
Block Poll Page Polled
Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW MaxW ReadBack
----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
lfuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
Block Poll Page Polled
Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW MaxW ReadBack
----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
hfuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
Block Poll Page Polled
Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW MaxW ReadBack
----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
efuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
Block Poll Page Polled
Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW MaxW ReadBack
----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
calibration 0 0 0 0 no 1 0 0 0 0 0x00 0x00
Programmer Type : usbasp
Description : USBasp, http://www.fischl.de/usbasp/
avrdude: usbasp_initialize()
avrdude: usbasp_transmit("USBASP_FUNC_GETCAPABILITIES", 0x00, 0x00, 0x00, 0x00)
avrdude: usbasp_spi_set_sck_period(0)
avrdude: auto set sck period (because given equals null)
avrdude: usbasp_transmit("USBASP_FUNC_SETISPSCK", 0x00, 0x00, 0x00, 0x00)
avrdude: warning: cannot set sck period. please check for usbasp firmware update.
avrdude: usbasp_transmit("USBASP_FUNC_CONNECT", 0x00, 0x00, 0x00, 0x00)
avrdude: usbasp_program_enable()
avrdude: usbasp_transmit("USBASP_FUNC_ENABLEPROG", 0x00, 0x00, 0x00, 0x00)
<= [01]
avrdude: error: program enable: target doesn't answer. 1
avrdude: initialization failed, rc=-1
Double check connections and try again, or use -F to override
this check.
avrdude: usbasp_close()
avrdude: usbasp_transmit("USBASP_FUNC_DISCONNECT", 0x00, 0x00, 0x00, 0x00)
avrdude done. Thank you.
It doesn't work with an external 5V supply (J1 removed), or with J1 set for 3.3V either.
With my scope, I can see that the clock is running at about 92.6 kHz, but the MISO and MOSI signals are very low in amplitude - about 1.1V for MISO and 0.8V for MOSI. These voltages seem a bit low to me:
Attachment 15269
I read that J3 can be used to set the programmer to "slow" mode (note that the ATtiny84 I'm currently trying to program is already running at 8 MHz from internal oscillator). However when adding J3, I don't see any change to the clock rate - it still runs at about 92.6 kHz.
From what I've read, the "Chinese" usbasp programmers tend to ship with some version of the software that enables clock speed detection. I'm not sure whether this translates to support for the "-B" option though, because no matter what -B value I provide, the scope shows the clock still running at 92.6 kHz.
I have made sure there's no other circuitry interfering with the programmer. I've also tried a second, "fresh" ATtiny84 (so fuses still set for 1MHz) with no success either. Yet the C232HM programmer works fine.
So nothing I've read seems to correlate with what I'm seeing with my device. I'm wondering if those MOSI/MISO voltages are too low (and why) and I'm also puzzled as to why neither J3 nor -B seems to affect the clock rate.
What could be wrong? What else can I investigate?
