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Read text files from pen drive usb
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Luciano

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Joined: 29 Nov 2004
Posts: 3149
Location: Italy

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PostPosted: Sat Jun 08, 2013 7:54 am    Post subject: Reply with quote

Hi,

you could also use a microSD card formatted FAT32 and AVR-DOS. To use the microSD card
with a PC, just plug the card into a Micro SD-USB Adapter (see attached picture).

Best regards,

Luciano
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MWS

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Joined: 22 Aug 2009
Posts: 1803

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PostPosted: Sat Jun 08, 2013 8:49 am    Post subject: Reply with quote

Luciano,
Luciano wrote:
you could also use a microSD card formatted FAT32 and AVR-DOS.

these are all feasible technical options, but the actual problem (that's where the TO gives the members a runaround in not mentioning it) is, that the one and most important factor was omitted: it has to be client-friendly.

If I remember right, there was a link from the TO, now seemingly removed by MOD (death from above Very Happy), which pointed to a beauty farm/clinic.
Which makes things clearer, as for such a purpose a memory stick or a smart card is client-friendly enough, while any other of the suggested solutions is not. Here it would have been responsibility of the TO to tell this frankly, which I do blame him for not doing it.

@Edit by MOD ...
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atmega64

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Joined: 23 Feb 2005
Posts: 269
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PostPosted: Wed Jun 12, 2013 4:00 pm    Post subject: Reply with quote

I apologize if I have not explained well ...

From the Project Agreements should I use a pen drive as a support ...

I want to test the example that we talked about:

http://www.mcselec.com/index.php?option=com_content&task=view&id=279&Itemid=57

I took all the components and designed the circuit ...

I have a small question ...

how should I set the programmer to set the value of the external clock of the micro 16Mhz??

Use AVRDUDESS v.1.2 programmer with AVR ISP mk II ... for example when I use an ATmega32 with quartz 4MHz imposed the fuses: L = H = 0xD9 0xEA and everything is ok ...

but with this new micro (ATMEGA644P clocked at 16MHz) can not seem to find the right settings and the program I part???

Thank you all.
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atmega64

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Joined: 23 Feb 2005
Posts: 269
Location: ITALY

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PostPosted: Thu Jun 13, 2013 7:33 am    Post subject: Reply with quote

Hi,

I tried using the link AVRDUDESS

http://www.engbedded.com/fusecalc

but there is no selection of 16MHz?? Evil or Very Mad
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AdrianJ

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Joined: 16 Jan 2006
Posts: 2470
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PostPosted: Thu Jun 13, 2013 7:57 am    Post subject: Reply with quote

According to the Atmel datasheet for AtMega644P, you should use CKSEL = 0111 for external crystal in full swing mode. There is no specific setting for 16 MHz, but that should work from 8-20MHz at Vcc = 5 volts.
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atmega64

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Joined: 23 Feb 2005
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PostPosted: Thu Jun 13, 2013 10:46 am    Post subject: Reply with quote

I tried with "FULL SWING OSCILLATOR; START-UP TIME 16KCK+0ms; CRYSTAL OSC: BOD ENABLE; CKSEL = 0111 SUT = 01" and AVRDUDESS works!

a couple of questions ...

- Why, if I want to program directly by BASCOM can not identify the microprocessor??

- I seem slow start the program ... is this normal?
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atmega64

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Joined: 23 Feb 2005
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PostPosted: Thu Jun 13, 2013 3:04 pm    Post subject: Reply with quote

Help.... Very Happy

Because this command:

Print # 1, "RD todo.txt" + Chr (13);

I get the following error:

Error: 42 Numeric parameter expected ["RD todo.txt]
Error: Invalid data type 31 [0011] 0 [13)]]
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kimmi

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Joined: 24 Feb 2006
Posts: 1922
Location: Denmark

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PostPosted: Thu Jun 13, 2013 10:44 pm    Post subject: Reply with quote

try change + to ;
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atmega64

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Joined: 23 Feb 2005
Posts: 269
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PostPosted: Fri Jun 14, 2013 9:20 am    Post subject: Reply with quote

Quote:
Print # 1, "RD todo.txt" + Chr (13);


resolved by deleting the ""


Quote:
- I seem slow start the program ... is this normal?


I solved by disabling: "Divide clock by 8 internally; [CKDIV8=0]"


Quote:
- Why, if I want to program directly by BASCOM can not identify the microprocessor??


this problem still remains a mystery ... Evil or Very Mad Evil or Very Mad Question Question
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kimmi

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PostPosted: Fri Jun 14, 2013 9:36 am    Post subject: Reply with quote

maybe this helps you info how to setup programmer and driver

http://avrhelp.mcselec.com/index.html?elektor__avr_isp_mkii.htm

http://avrhelp.mcselec.com/index.html?libusb.htm

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albertsm

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Joined: 09 Apr 2004
Posts: 5034
Location: Holland

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PostPosted: Fri Jun 14, 2013 9:44 am    Post subject: Reply with quote

- you should read the actual help you get.
- you change the topic right in the thread to a new one ? This is not the 'help me with all my problems' topic.
- you do not give good info, how you do you think you will get help?

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