SLLogicLogger - A simple logic analyser for the Stellaris Launchpad

[jazz 209]

My logic analyzer, based on MSP430F550x, conected to PC by USB, have sampling frequency (using DMA) MCLK/2 (24 MHz / 2 = 12 MHz).

 

http://forum.43oh.com/topic/3909-msp430f550x-based-logic-analyzer/

 

I expect that much higher resolution is possible with Stellaris Launchpad.

[igor 163]

The logic sniffer app says so. I did not change the code. I used the available window in the provided software. So you suggest that I should change the code. I'll look into it. I thought changing the sampling time will change the period.

 

The inner loop has no built-in period adjustment - just a bunch of reads and writes in a tight loop.

Would be easy to insert some delay.

If you increase buffersize a lot will probably run out of RAM (only 32KB RAM).

[Pradeepa 1]

My logic analyzer, based on MSP430F550x, conected to PC by USB, have sampling frequency (using DMA) MCLK/2 (24 MHz / 2 = 12 MHz).

 

http://forum.43oh.com/topic/3909-msp430f550x-based-logic-analyzer/

 

I expect that much higher resolution is possible with Stellaris Launchpad.

 

Resolution is not the biggest worry for me. But the capture time. What is the capture time of your design?

[Pradeepa 1]

The inner loop has no built-in period adjustment - just a bunch of reads and writes in a tight loop.

Would be easy to insert some delay.

If you increase buffersize a lot will probably run out of RAM (only 32KB RAM).

 

Thank you. I'll check that.

[jazz 209]

Resolution is not the biggest worry for me. But the capture time. What is the capture time of your design?

 

MSP430F550x is limited with 6 KB RAM (1 bit for 8 chanels -> 1 byte)

[agaelema 39]

I'm trying to compile the code but I get these messages:

- #20 identifier "GPIO_PA0_U0RX" is undefined

- #20 identifier "GPIO_PA1_U0TX" is undefined

 

I installed the StellarisWare, how do I fix this error?

[Lyon 3]

Hi,

In CCS, go to compiler's Predefined Symbols pane and add the followings:

PART_TM4C123GH6PGE or the exact name of your part

TARGET_IS_BLIZZARD_RA1

ccs="ccs"

 

L.

[agaelema 39]

I tried to fix the error but new errors appeared.

 

In the CCS I followed this sequence: Project > Properties > CCS Build > ARM Compiler > Advanced Options > Predefined Symbols > Pre-Defined NAMES (insert here "PART_LM4F120H5QR").

 

This is right? I'm using the Stellaris Launchpad, not Tiva.

 

The CCS Before the changes:

 

The CCS After the changes:

 

Thanks.

[Lyon 3]

Hi,

You need also to add this line at the beginning of the file:

#include "driverlib/rom_map.h"

This will allow you to call functions from ROM - also lowering the code size.

Try this first and we will se for the remaining errors (stack) - try also to increase its size, but from CCS, not from linker or startup file (unfortunately there are three places to modify the stack...)

L.

[agaelema 39]

Hi @@Lyon, i tried to put the other include but nothing happens. The same errors.

 

can you upload your project to me?

[agaelema 39]

I tried solve the problem changing Stellarisware by Tivaware without put the "pre-defined name"

 

The two initial errors was resolved, but appeared on new error:

Description Resource Path Location Type

#1965 cannot open source file "inc/lm4f120h5qr.h" main.c /sllogiclogger line 29 C/C++ Problem

 

When I try exclude this "include" appear 90 new errors like: 

Description Resource Path Location Type

#20 identifier "bool" is undefined main.c /sllogiclogger line 147, external location: C:\TivaWare_C_Series\driverlib\gpio.h C/C++ Problem

 

Description Resource Path Location Type

#20 identifier "int32_t" is undefined main.c /sllogiclogger line 151, external location: C:\TivaWare_C_Series\driverlib\gpio.h C/C++ Problem

 

I'm having many problems to execute codes from internet that use the "Stellaris Ware" and "Tiva Ware".

[Bingo600 0]

Did you try to include stdint.h

I don't use CCS , but would expect it also have a stdint.h

 

The net suggests to include stdbool.h , for the bool definition

 

 

Both ought to be system defs meaning : #include <stdint.h>  , and not #include "stdint.h"

 

/Bingo

[agaelema 39]

@@Bingo600, I tried this but not worked, the same error

[Bingo600 0]

@agaelema

 

Strange ...

And you made sure that the includes i mentioned was included before the "Cpu include"

 

/Bingo