topic Re: Problem with CS1 in ColdFire/68K Microcontrollers and Processors

Problem with CS1

sidnevmaxim — Sun, 22 Jun 2014 10:46:51 GMT

It isn't possible to address to External MRAM Memory on CS1.

I use M523XEVB set

I program in the environment of IAR V1.23 KickStart.

For initialization of CS1 I use a code

MCF_CS1_CSAR = 0x3000;

MCF_CS1_CSCR = 0x3d20;

MCF_CS1_CSMR = MCF_CS_CSMR_BAM_1M | MCF_CS_CSMR_V;

In the lnkm5235EVB_flash.xcl file (the configuration IAR file) I import a line:

Z(DATA)FAR_I,FAR_Z,FAR_N,HEAP+_HEAP_SIZE,.iar.dynexit+((_DYNEXIT_ELEMENTS+14)*C)=30000000-3000FFFF

As Flash Programmer I use CodeWarrior v6.3 for a configuration of a board I use the standard MCF523xEVB_PnE.cfg file

In the program I address to this area of memory and I have no activity on CS1.

Re: Problem with CS1

TomE — Mon, 23 Jun 2014 00:17:00 GMT

What is the current Pin Assignment for the CS1/PCS1 pin? See:

12.3.1.5.4 Chip Select Pin Assignment Register (PAR_CS)

> In the program I address to this area of memory and I have no activity on CS1.

Disassemble your code and make sure it is generating the address you think it is.

If you have a debug pod, try reading the memory from there.

Directly access the memory in a test loop with something like "long int tmp = *((long int *)0x30000000);"

Tom

Re: Problem with CS1

sidnevmaxim — Mon, 23 Jun 2014 18:01:55 GMT

>What is the current Pin Assignment for the CS1/PCS1 pin? See:

>12.3.1.5.4 Chip Select Pin Assignment Register (PAR_CS)

PAR_CS bits1 = 1 (CS1 pin configured for EIM CS1 function)

>Disassemble your code and make sure it is generating the address you think it is.

// Init CS1

// 166 MCF_CS1_CSAR = MCF_CS_CSAR_BA(EXT_SRAM_ADDRESS);

MOVE.W #12288, D0

MOVE.W D0, (__IPSBAR+140).L

// 167 MCF_CS1_CSCR = 0x3d20;

MOVE.W #15648, D0

MOVE.W D0, (__IPSBAR+150).L

// 168 MCF_CS1_CSMR = 0x000F0001;//MCF_CS_CSMR_BAM_1M | MCF_CS_CSMR_V;

MOVE.L #983041, D0

MOVE.L D0, (__IPSBAR+144).L

........

// RAM access

// 271 long int tmp = *((long int *)0x30000000);

MOVE.L (0x30000000).L, D0

// 272

// 273 tmp++;

ADDQ.L #1, D0

No activity on CS1

Maxim.

Re: Problem with CS1

TomE — Tue, 24 Jun 2014 04:18:44 GMT

Try programming CS1 as a GPIO set to Output and make sure you can see the pin go up and down when you write ones and zeros to the pin.

Try programming it as an input and then see if you can see the pin state change when you pull CS1 high and low (with a resistor).

Try one of the other chip-select pins if you have them connected to a pad you can get to.

Tom

Re: Problem with CS1

sidnevmaxim — Tue, 24 Jun 2014 17:07:19 GMT

>Try programming CS1 as a GPIO set to Output and make sure you can see the pin go up and down when you write ones and zeros to the pin.

I checked as GPIO output works operationally

>Try programming it as an input and then see if you can see the pin state change when you pull CS1 high and low (with a resistor).

I use m523xEVB. Without circuit changes it is difficultly to make it

>Try one of the other chip-select pins if you have them connected to a pad you can get to.

I am sure that CS1 is hardware operational. For its check I used Tool Hardware Diagnostics (Code Warrior 7.2). Memory Test tab. Address Range: Start 0x30000000 End 0x300000ff. Enable test:

- Walking 1s

- Address

- Bus Noise

Configuration file: MCF523xEVB_PnE.cfg

A test passes successfully and on CS1 there is an activity

I have a question:

What do I do incorrectly in my user program to address to RAM on CS1?

Re: Problem with CS1

TomE — Thu, 26 Jun 2014 03:48:24 GMT

> What do I do incorrectly in my user program to address to RAM on CS1?

I don't know. That's what programming and debugging are all about.

Can you cut-and-paste code from a working example into your code?

Tom

Re: Problem with CS1

sidnevmaxim — Thu, 26 Jun 2014 16:27:07 GMT

>Can you cut-and-paste code from a working example into your code?

Yes I can paste the code from working example if You would give me.

Maxim.

Re: Problem with CS1

TomE — Fri, 27 Jun 2014 04:59:03 GMT

> Yes I can paste the code from working example if You would give me.

I meant the Memory Test code that you're running.

Or any other sample code that Freescale has provided for that or similar chips.

You should also be able to read the MCF523xEVB_PnE.cfg file and convert whatever is in there to equivalent code.

Tom