Hi Richard,
Thanks for the help.
Am I correct in assuming that the GNU ARM header file lpc210x.h is the
correct header file for the lpc2138?
Cheers,
Peter.
FreeRTOS Info wrote:
>>I'm now at a point in deciding whether to convert the Keil demo to
>>compile under GCC, or use the 2106 demo to run on a 2138.
>
>
>
> Definitely start with the 2106 demo - this means you have the compiler
> options, startup code and a linker script all ready (the linker script needs
> editing).
>
> 1) Take the linker scripts lpc2106_ram.lk and lpc2106_rom.lk and edit them
> for the correct memory map. I think the only lines that need changing are
> at the very top:
>
> ----------
> MEMORY
> {
> flash : ORIGIN = 0, LENGTH = 120K
> ram : ORIGIN = 0x40000000, LENGTH = 64K
> }
>
> __stack_end__ = 0x40000000 + 64K - 4;
> ----------
>
> It might just be that the 64K's need changing to 32K's, but check the data
> sheet for the correct memory map.
>
>
> 2) In FreeRTOSConfig.h (demo/ARM7_LPC2106_GCC/FreeRTOSConfig.h) change the
> line #include <lpc210x.h> to include the correct header file for the
> LPC2138.
>
>
> 3) The heap size is set to 23K within
> demo/ARM7_LPC2106_GCC/FreeRTOSConfig.h, so this might be ok to leave. If
> this is too large then it can be reduced and some of the demo app tasks
> removed. If the function vTaskStartScheduler() returns then you know you
> have run out of space.
>
>
> 4) The LED interface functions are found within
> demo/ARM7_LPC2106_GCC/ParTest/ParTest.c. You may want to take the set,
> clear and toggle LED functions from the Keil demo into the GCC demo so you
> can see the LED's flashing. The functions within the GCC demo are correct
> for the Olimex board rather than the Keil board.
>
>
>
> Regards,
> Richard.
>
>
>
>
>
>>Cheers,
>>
>>Peter.
>>
>>FreeRTOS Info wrote:
>>
>>>>I'm trying to get FreeRTOS running on the LPC2138.
>>>>
>>>>I can use the Keil demo compiler to compile the Keil demo to work.
>>>>
>>>>I've managed to get the 2016 GCC demo compiled and downloaded to the
>>>>board. Of course it doesn't work. :-)
>>>>
>>>>I'm new to the ARM LPC2138, GCC and FreeRTOS, so it is a steep learning
>>>>curve.
>>>>
>>>>The LPC2016 GCC FreeRTOS demo is targeted at the Olimex board.
>>>>
>>>>Can anyone point me to a demo targeted at the LPC2138 or at least point
>>>>me in the right direction to configure RTOS for the LPC2138.
>>>
>>>
>>>
>>>You are trying to target the LPC2138, but I'm a bit confused about the
>>>compiler you are wanting to use. Keil or GCC?
>>>
>>>The main difference between the devices as far as FreeRTOS is concerned
>
> is
>
>>>the differing amounts of RAM.
>>>
>>>LPC2129 (used with the standard Keil demo) has 16K.
>>>LPC2106 has 65K.
>>>LPC2138 has 32K.
>>>
>>>It is best to start with the demo project for the compiler you are
>
> using.
>
>>>This way you will get the correct compiler options and a ready made
>
> working
>
>>>project. Once you have the demo for your compiler building (should
>
> build
>
>>>exactly as downloaded) you can make some small changes to target the
>
> project
>
>>>at a different chip.
>>>
>>>The changes are basically:
>>>
>>>+ Change the value of configTOTAL_HEAP_SIZE within FreeRTOSConfig.h to
>
> take
>
>>>into account the amount of RAM available on the device.
>>>
>>>+ Change any device specific header files (the compiler supplied headers
>>>that contain all the register locations) that are included within
>>>FreeRTOSConfig.h to ensure they are for whichever device you are using.
>
> If
>
>>>you are using Keil then maybe there is nothing to do as lpc21xx.h will
>
> cover
>
>>>both the LPC2106 and LPC2138.
>>>
>>>+ Change the project target to be for the device you are using. This
>
> might
>
>>>be done from within the Keil IDE and ensures the linker and debugger
>
> know
>
>>>the memory map. Alternatively if you are using GCC you will have to
>
> edit
>
>>>the linker script as appropriate for the different memory map.
>>>
>>>
>>>That should be it (?).
>>>
>>>Note that the demo applications can use up all the available RAM. If
>
> you
>
>>>are taking a project targeted at an LPC2106 and running it on an LPC2129
>>>then you may have to reduce the number of demo tasks that are created in
>
> the
>
>>>sample project.
>>>
>>>Regards,
>>>Richard.
>>>
>>>
>>>
>>>
>>>>Once again that for the help with the flashing problem.
>>>>
>>>>Cheers,
>>>>
>>>>Peter.
>>>>
>>>>
>>>>
>>>>
>>>>Peter Homann wrote:
>>>>
>>>>
>>>>>Hi,
>>>>>
>>>>>Thanks guys. I'll break out the test gear tonight.
>>>>>
>>>>>From what is being said, it is either a hardware problem, or the LPC
>
> is
>
>>>>>not entering boot mode.
>>>>>
>>>>>I can hold P0.14 lo, then use a terminal program to issue '?' and see
>
> if
>
>>>>>there is a response.
>>>>>
>>>>>Do you know what the rest of the command set is?, or will the '?'
>>>>>character cause the boot loader to spit it out at me?
>>>>>
>>>>>Cheers,
>>>>>
>>>>>Peter.
>>>>>
>>>>>rtstofer wrote:
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>>--- In lpc2000@yahoogroups.com, Tom Walsh <tom@o...> wrote:
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>>Peter Homann wrote:
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>>Richard,
>>>>>>>>
>>>>>>>>Yes, it had been working. I think I downloaded a Hex file for a
>>>>>>>>processor other than the LPC2138 and then it seemed to stop
>>>>>>
>>>>>>working.
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>>>I don't think it is a hardware problem.
>>>>>>>>
>>>>>>>>For the third time, is it possible to erase the boot loader or
>>>>>>
>>>>>>screw it up?
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>>No, you cannot. According to the Philips doc that 8K sector is
>>>>>>>protected from erasure.
>>>>>>>
>>>>>>>Please refer to the Philips manual: "LPC213x User Manual"
>>>>>>
>>>>>>#UM10120, top
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>>of page 221.
>>>>>>>
>>>>>>>
>>>>>>>TomW
>>>>>>
>>>>>>
>>>>>>I read all around that paragraph. But that's the word - it can't be
>>>>>>overwritten.
>>>>>>
>>>>>>Richard
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>Yahoo! Groups Links
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>>
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>>>>email: homann@...
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>>>>
>>>>
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>>
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Re: [lpc2000] FreeRTOS on LPC2138
2005-11-11 by Peter Homann