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PIC16F877 to uMMC (FLash Card module) question

 
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dacenrie



Joined: 02 Mar 2006
Posts: 16

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PIC16F877 to uMMC (FLash Card module) question
PostPosted: Fri Mar 03, 2006 2:05 pm     Reply with quote

Please help. I've been trying to interface the uMMC with my PIC16F877 but can't seem to get it to work. I'm unable to open a new file, write to it, etc. The uMMC requires a carriage return and line feed after sending it an instruction. I'm not sure how to send that safely.

Here's the current code that I've been working with. Please help!

Note: baud rate set to 9600. Also, I'm using C language(CCS compiler).

void main(){
char prompt;

while (prompt != '>'){ //check if module ready
prompt = getc();
}

printf ("O 1 W input_data.txt", 0x0d, 0x0a); // Is this how u send a carriage return and line feed?

while (prompt != '>'){ //Is uMMC ready for next instruction?
prompt = getc();
}

printf ("W 1 19", 0x0d);
printf ("Date: Mar 03 2006", 0x0d, 0x0a);

while (prompt != '>'){
prompt = getc();
}

printf ("C 1", 0x0d);

}

Please...someone help!!!
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Fri Mar 03, 2006 2:26 pm     Reply with quote

Use the following Escape Sequences for carriage return and linefeed:
Quote:
\r for carriage return (0x0D)
\n for linefeed (0x0A)


Example:
Code:

#include <16F877.H>
#fuses XT, NOWDT, NOPROTECT, BROWNOUT, PUT, NOLVP
#use delay(clock=4000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7, ERRORS)

void main()
{

printf ("C 1\r\n");

while(1);
}
King Virus



Joined: 02 Mar 2006
Posts: 14
Location: Italy

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PostPosted: Sun Mar 05, 2006 3:51 am     Reply with quote

Hi dacenrie !

Could you give me some help about buying a uMMC... I know it but I�m not able to find a distributor who send this product to Italy, where I live. Crying or Very sad
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dacenrie



Joined: 02 Mar 2006
Posts: 16

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PostPosted: Mon Mar 06, 2006 2:43 am     Reply with quote

I got mine from roguerobotics.com, see if they are willing to ship to Italy. I'm not to sure if anyone else will. Sorry.
King Virus



Joined: 02 Mar 2006
Posts: 14
Location: Italy

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PostPosted: Wed Mar 08, 2006 2:41 pm     Reply with quote

Hi dacenrie !

Thanks,
buth they don�t send it to Italy,... Crying or Very sad

I�ll search again in the web...
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Ttelmah
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PostPosted: Wed Mar 08, 2006 3:32 pm     Reply with quote

They do have distributors in the UK, Spain, and France. I'm sure one of them would help. Look under 'distributors', in the roguerobotics site.

Best Wishes
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