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How to see a serial data being sent ?

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Easyrider83 said:
Code: 
void AT25_WritePage(uint address, //from this address;
 uchar num_of_byte, //the number(<32) of bytes to write;
 uchar* source //data to write.
 )
 { 
 uchar i=0;

 /* Filter the parameters */
 if(num_of_byte>32) num_of_byte=32;
 //if(address>4096) address=0;
 if(address>8192) address=0;
 /* make sure that the device is write enabled */
 AT25320_CS=0;
 _nop_();
 SPI_WriteByte(WREN);
 AT25320_CS=1;
 _nop_();
 _nop_();

 /* write op_code,address and data into the device */

 AT25320_CS=0;
 _nop_();
 SPI_WriteByte(WRITE); //op_code

 SPI_WriteByte((uchar)(address >>8)); 
 SPI_WriteByte((uchar)(address));

 for(i=0;i<num_of_byte;i++)
 {
 SPI_WriteByte(*source);
 source++; 
[COLOR="#FF0000"]DELAY SHOULD BE HERE[/COLOR]
 }

 AT25320_CS=1;

 }
Click to expand...

Very valuable information, I will try now, I have tried at ISIS, it works, my question, how can I make VCC for WP and HOLD at 25AA640 ?
I'll let you know the result soon...

Thank you very much
 

25640.jpg
25AA640, how to connect to Vcc ?
 

bianchi77 said:
Very valuable information, I will try now, I have tried at ISIS, it works, my question, how can I make VCC for WP and HOLD at 25AA640 ?
I'll let you know the result soon...

Thank you very much
Click to expand...

I put like this, now compiling and upload to chip....
Code: 
for(i=0;i<num_of_byte;i++)
	{
		SPI_WriteByte(*source);
		source++;
		delay_ms(10);	
	}


---------- Post added at 11:32 ---------- Previous post was at 11:23 ----------

or I use _nop_(); for delay ?
 

bianchi77 said:
how can I make VCC for WP and HOLD at 25AA640 ?
Click to expand...
Press the "Terminals Mode" button on left panel. Choose "POWER". Place the power terminal to the schematic, open properties, enter VCC in "string" value.
By default, unnamed power terminal already connected to +5V.

bianchi77 said:
I put like this, now compiling and upload to chip....
Code: 
for(i=0;i<num_of_byte;i++)
	{
		SPI_WriteByte(*source);
		source++;
		delay_ms(10);	
	}


---------- Post added at 11:32 ---------- Previous post was at 11:23 ----------

or I use _nop_(); for delay ?
Click to expand...
nop is 'nothing to operate' instruction. It is useless in your case. Delay_ms library using nop instructions to proceed the delay.
So, if you have delay library, just use "delay_ms(10);"
 

bianchi77 said:
Very valuable information, I will try now, I have tried at ISIS, it works, my question, how can I make VCC for WP and HOLD at 25AA640 ?
I'll let you know the result soon...

Thank you very much
Click to expand...

I got :
memory3.jpg

??
 

Easyrider83 said:
Press the "Terminals Mode" button on left panel. Choose "POWER". Place the power terminal to the schematic, open properties, enter VCC in "string" value.
By default, unnamed power terminal already connected to +5V.


nop is 'nothing to operate' instruction. It is useless in your case. Delay_ms library using nop instructions to proceed the delay.
So, if you have delay library, just use "delay_ms(10);"
Click to expand...

Found the power, thanks

will be like this :
Code: 
void delay_ms(unsigned int msec)    //delay function
	{	
	 	//;
		
		unsigned int i,j;
		for(i=0;i<msec;i++);
		for(j=0;j<1;j++);
               [COLOR="#FF0000"]_nop_();     [/COLOR]	
	}


for(i=0;i<num_of_byte;i++)
	{
		SPI_WriteByte(*source);
		source++;
		delay_ms(10);
                [COLOR="#FF0000"]_nop_();[/COLOR]	
	}

I put like that ?
 

bianchi77 said:
I got :
View attachment 64921

??
Click to expand...
Code: 
while (address<0x0008)
 {
 while (counter<8)
 {
 AT25_WriteByte(address,pattern[counter]);

 }
[COLOR="#FF0000"]address++;[/COLOR]
 }


bianchi77 said:
Found the power, thanks

will be like this :
Code: 
void delay_ms(unsigned int msec)    //delay function
	{	
	 	//;
		
		unsigned int i,j;
		for(i=0;i<msec;i++);
		for(j=0;j<1;j++);
               [COLOR="#FF0000"]_nop_();     [/COLOR]	
	}


for(i=0;i<num_of_byte;i++)
	{
		SPI_WriteByte(*source);
		source++;
		delay_ms(10);
                [COLOR="#FF0000"]_nop_();[/COLOR]	
	}

I put like that ?
Click to expand...
forget about nop command. Delete them all.
 

Easyrider83 said:
Code: 
while (address<0x0008)
 {
 while (counter<8)
 {
 AT25_WriteByte(address,pattern[counter]);

 }
[COLOR="#FF0000"]address++;[/COLOR]
 }



forget about nop command. Delete them all.
Click to expand...

Ok I will....
I must reset uC to run it ? the real chip ?
I put Vcc and ground off line and install all the chip then reset ?
 

Easyrider83 said:
Code: 
while (address<0x0008)
 {
 while (counter<8)
 {
 AT25_WriteByte(address,pattern[counter]);

 }
[COLOR="#FF0000"]address++;[/COLOR]
 }



forget about nop command. Delete them all.
Click to expand...

It's fine in simulation but different in chip....
Simulation :
memory6.jpg
 

Sorry, not understanding you. With real chip it write another data? Show me your schematic.
 

Hardware result :
memory7.jpg

Do you know what the cause is ?
Could be a bypass capasitor ? or because I put on off and reset ?
What's the proper procedure to test it ?

Thanks
 

Looks like the same data but mixed address. I can't explain why. Try to include delay before the main program run. Possible, about 100 ms or more.
 

Easyrider83 said:
Looks like the same data but mixed address. I can't explain why. Try to include delay before the main program run. Possible, about 100 ms or more.
Click to expand...

Ok I will, I scratch a schematic already in paper and pencil, do you need it ?
 

Looks like the same data but mixed address. I can't explain why. Try to include delay before the main program run. Possible, about 100 ms or more.
Click to expand...
I tried to give a delay :
Code: 
 uint address,counter;
 unsigned char pattern[8] = {0x3C,0x42,0xA5,0xA5,0x81,0xA5,0x5A,0x3C,};
     delay_ms(50);
  	 address=0x0000;
	 counter=0;
   
	for(address=0x0000;address<0x0008;)
		{
		   
			for(counter=0;counter<8;counter++)
		
			 {
	
			  
			   AT25_WriteByte(address,pattern[counter]);
			 }
			 
		address++;		
	
	
		} //end of while for address

Still got mixed up pattern in chip, anyone can give any clues ?
data7.jpg
thanks
 

bianchi77 said:
Ok I will, I scratch a schematic already in paper and pencil, do you need it ?
Click to expand...
the delay :
Code: 
void delay_ms(unsigned int msec)    //delay function
	{	
	 	//;
		
		unsigned int i,j;
		for(i=0;i<msec;i++);
		for(j=0;j<1110;j++);
		
     	
	}
 

Easyrider83 said:
Looks like the same data but mixed address. I can't explain why. Try to include delay before the main program run. Possible, about 100 ms or more.
Click to expand...

I saw from 25LC640 :

==Write Cycle Time: 5 ms max==
Does it matter for the delay ? since I still got random data but the simulation is ok already ??
 
Last edited:

bianchi77 said:
Guys,

How can I see a data being sent into SI pin of 25640?
I want to see data at P3^6 ( byte by byte ), for example I send 1B 2A 3C 4B, how can I see them byte by byte correctly being sent ?
Watch ? capture ? Debug ?
How can I do it with keil / ISIS ?

Thanks
Click to expand...

you can use pelles c..download it..its free..execute your program there..but of course need to modified your program to assume an input and just print out byte by byte at the end of program..compile n run..^^
 

Marvin_G said:
you can use pelles c..download it..its free..execute your program there..but of course need to modified your program to assume an input and just print out byte by byte at the end of program..compile n run..^^
Click to expand...

pelles c
Is it IDE like keil ?
 

bianchi77 said:
pelles c
Is it IDE like keil ?
Click to expand...

Pelles C is where you can test your code whether it is working or not ..yes its like KEIL..u can test ur code in KEIL also but quite hard..so the simplest way is using pelles c..try it first..
 

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