Cortex-M4 Support?

Completed

Jerry Gardner

March 16, 2011 16:41

Are there plans to fully support the ARM Cortex-M4, particularly the LPC43xx series, in CrossWorks?

Comments

28 comments

Michael Johnson

March 17, 2011 11:48
Cortex-M4 support will be in the 2.1 release which we are currently wrestling with. You can have early access to it if you want. I have a preliminary CPU/board support package for the Embedded Artists LPC4300 board which I can supply if you have one of these boards.
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Jerry Gardner

March 17, 2011 13:54
Embedded Artists have an LPC4300 board? I searched their website and saw no reference to such a board. Can you provide a link?
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Michael Johnson

March 17, 2011 14:48
The board has a test chip on it so I guess it's not available yet - contact NXP.
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Michael Freeman

March 17, 2011 15:25
We are thinking about using Kinetis chip from Freescale for the next project. Does Rowley have plans for this family of chips?

Thanks

Michael Freeman
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Michael Johnson

March 17, 2011 15:56
We've have released a Kinetis CPU support package that works with v2.0 i.e. treating the device as a Cortex-M3. We are working on the Cortex-M4 support for the v2.1 release. Note that we haven't seen a Kinetis part with an FPU on it.
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Paul Curtis

March 17, 2011 22:15
The LPC4300 won't be available until Q4 2011, it seems. The production Keil board I have on order, which should have arrived this month, is now delayed to Q4. NXP are intruducing the flashless versions first, but no word on integrated flash introduction.

The Cortex-M4 is really raw at this stage--no hardware with FPU to speak of, as Michael says. The test LPC4300 we have does include an FPU, so all is not yet lost.
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Michael Freeman

March 18, 2011 02:11
We have 3 Kinetis Towers, 2 with K60 one with K40. My impresion is the Kinetis chips we got have all the features in them. Do you need one to complete you dev?

Michael Freeman
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Michael Johnson

March 18, 2011 07:31
We have the same hardware - the released CPU support package works on these boards give it a try.

I need to do some work on the DSP/SIMD instruction support in the debugger/simulator before we can support the parts as Cortex-M4's rather than as Cortex-M3's.

There isn't an FPU on the K60 supplied on the Tower board we have - my understanding is that the FPU is only on the 120Mhz parts.
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Michael Freeman

March 18, 2011 17:47
You are right, there is no FPU on these. Freescale is a little missleading on their web page about this.
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Qasim, Mohammed (H USA)

September 15, 2011 16:02
Along the same lines, is there support for Cortex A8 (i.MX53 family) in the pipeline?
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Michael Johnson

September 15, 2011 16:31
The CortexM4 support was released (including FPU support) in the V2.1.

There will be support for CortexA/CortexR in the next release.

Supporting specific CortexA/CortexR chips is another matter.
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Bn-spam

September 25, 2011 19:26
How much work will it be to support the STM32F4 (Cortex M4 with FPU!) just announced by ST Micro?
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Paul Curtis

September 25, 2011 21:39
The work is in the memory map; if SVD files are provided by ST or it's no too different from the F2 devices, it should be fairly rapid.
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MLC Michael Lamber

October 22, 2011 10:37
Hello Paul, we want to start with Cortex M4 (STM32F4 with FPU). Have you any idea, when crossworks is ready for it? Can we use the crossconnect debugger? Thanks Michael
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Paul Curtis

October 22, 2011 12:06
http://www.rowleydownload.co.uk/arm/packages/STM32.htm
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Michael Johnson

October 24, 2011 07:02
You'll need v2.1.2 which haven't released yet - the nightly build is available here

linux

http://www.rowleydownload.co.uk/snapshots/arm_crossworks_crossworks_v2_linux_x86.tar.gz

macosx

http://www.rowleydownload.co.uk/snapshots/arm_crossworks_crossworks_v2_macos_x86.dmg

windows

http://www.rowleydownload.co.uk/snapshots/arm_crossworks_crossworks_v2_win_x86_setup.exe

Regards

Michael
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MLC Michael Lamber

October 24, 2011 09:37
Thanks,

I installed this version and wrote a little program.

But I get the message:

D:/Program Files (x86)/Rowley Associates Limited/CrossWorks for ARM 2.1/gcc/arm-unknown-elf/bin/ld: cannot find D:/Program Files (x86)/Rowley Associates Limited/CrossWorks for ARM 2.1/lib/libm_v7em_t_le.a: No such file or directory
D:/Program Files (x86)/Rowley Associates Limited/CrossWorks for ARM 2.1/gcc/arm-unknown-elf/bin/ld: cannot find D:/Program Files (x86)/Rowley Associates Limited/CrossWorks for ARM 2.1/lib/libc_v7em_t_le.a: No such file or directory
D:/Program Files (x86)/Rowley Associates Limited/CrossWorks for ARM 2.1/gcc/arm-unknown-elf/bin/ld: cannot find D:/Program Files (x86)/Rowley Associates Limited/CrossWorks for ARM 2.1/lib/libcpp_v7em_t_le.a: No such file or directory
D:/Program Files (x86)/Rowley Associates Limited/CrossWorks for ARM 2.1/gcc/arm-unknown-elf/bin/ld: cannot find D:/Program Files (x86)/Rowley Associates Limited/CrossWorks for ARM 2.1/lib/libdebugio_v7em_t_le.a: No such file or directory
D:/Program Files (x86)/Rowley Associates Limited/CrossWorks for ARM 2.1/gcc/arm-unknown-elf/bin/ld: cannot find D:/Program Files (x86)/Rowley Associates Limited/CrossWorks for ARM 2.1/lib/libc_targetio_impl_v7em_t_le.a: No such file or directory
D:/Program Files (x86)/Rowley Associates Limited/CrossWorks for ARM 2.1/gcc/arm-unknown-elf/bin/ld: cannot find D:/Program Files (x86)/Rowley Associates Limited/CrossWorks for ARM 2.1/lib/libc_user_libc_v7em_t_le.a: No such file or directory
Build failed

All files are the specified folder.

Have you any idea?

Also I get not working the FPU for STM32F407 microcontroller.

Here I get the message:

C:/Users/ML/AppData/Local/Rowley Associates Limited/CrossWorks for ARM/packages/targets/STM32/STM32_Startup.s:1:0: sorry, unimplemented: -mfloat-abi=hard and VFP
Build failed

Is there anything wrong with my settings or is the compiler not ready for FPU.

Thanks for yout help

Michael
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Michael Johnson

October 24, 2011 09:54
You'll need to use the EABI gcc target - this can be set in the project properties or the default changed in crossstudio environment options.

Regards

Michael
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Michael Johnson

October 24, 2011 10:01
Forgot to mention - that I'd set the "treat doubles as floats" option to avoid any double precision stuff being generated due floating point constants - i.e C code will have 3.142 NOT 3.142f

Regards

Michael
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MLC Michael Lamber

October 24, 2011 10:25
Hello Michael,

first problem is solved.

With the FPU I get the folowing error:

D:/Program Files (x86)/Rowley Associates Limited/CrossWorks for ARM 2.1/gcc/arm-unknown-eabi/bin/ld: error: D:/Program Files (x86)/Rowley Associates Limited/CrossWorks for ARM 2.1/lib/libc_v7em_fpv4_sp_d16_hard_t_le_eabi.a(__vfprintf_int.o) uses VFP register arguments, THUMB Debug/Executable_1.elf does not
D:/Program Files (x86)/Rowley Associates Limited/CrossWorks for ARM 2.1/gcc/arm-unknown-eabi/bin/ld: failed to merge target specific data of file D:/Program Files (x86)/Rowley Associates Limited/CrossWorks for ARM 2.1/lib/libc_v7em_fpv4_sp_d16_hard_t_le_eabi.a(__vfprintf_int.o)
D:/Program Files (x86)/Rowley Associates Limited/CrossWorks for ARM 2.1/gcc/arm-unknown-eabi/bin/ld: error: D:/Program Files (x86)/Rowley Associates Limited/CrossWorks for ARM 2.1/lib/libc_v7em_fpv4_sp_d16_hard_t_le_eabi.a(__vfscanf_int.o) uses VFP register arguments, THUMB Debug/Executable_1.elf does not
D:/Program Files (x86)/Rowley Associates Limited/CrossWorks for ARM 2.1/gcc/arm-unknown-eabi/bin/ld: failed to merge target specific data of file D:/Program Files (x86)/Rowley Associates Limited/CrossWorks for ARM 2.1/lib/libc_v7em_fpv4_sp_d16_hard_t_le_eabi.a(__vfscanf_int.o)
D:/Program Files (x86)/Rowley Associates Limited/CrossWorks for ARM 2.1/gcc/arm-unknown-eabi/bin/ld: error: D:/Program Files (x86)/Rowley Associates Limited/CrossWorks for ARM 2.1/lib/libc_v7em_fpv4_sp_d16_hard_t_le_eabi.a(libc2.o) uses VFP register arguments, THUMB Debug/Executable_1.elf does not
D:/Program Files (x86)/Rowley Associates Limited/CrossWorks for ARM 2.1/gcc/arm-unknown-eabi/bin/ld: failed to merge target specific data of file D:/Program Files (x86)/Rowley Associates Limited/CrossWorks for ARM 2.1/lib/libc_v7em_fpv4_sp_d16_hard_t_le_eabi.a(libc2.o)
D:/Program Files (x86)/Rowley Associates Limited/CrossWorks for ARM 2.1/gcc/arm-unknown-eabi/bin/ld: error: D:/Program Files (x86)/Rowley Associates Limited/CrossWorks for ARM 2.1/lib/libc_user_libc_v7em_fpv4_sp_d16_hard_t_le_eabi.a(user_libc.o) uses VFP register arguments, THUMB Debug/Executable_1.elf does not
D:/Program Files (x86)/Rowley Associates Limited/CrossWorks for ARM 2.1/gcc/arm-unknown-eabi/bin/ld: failed to merge target specific data of file D:/Program Files (x86)/Rowley Associates Limited/CrossWorks for ARM 2.1/lib/libc_user_libc_v7em_fpv4_sp_d16_hard_t_le_eabi.a(user_libc.o)
Build failed

Settings:

ARM FP ABI Type    Hard

ARM FPU Type        FPV4-SP-D16

C-Program:

int main()
{
float a,b,c;
a = 22.3;
b = 2456.56578;
do
{
    c = a + b;
}
while(1);
return 0;
}

Thank you

Michael
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Michael Johnson

October 24, 2011 10:35
Hi Michael

Did you rebuild all after changing the gcc target?

Regards

Michael
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MLC Michael Lamber

October 24, 2011 10:38
Yes, I do.

The error message is after I try to rebuild
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Michael Johnson

October 24, 2011 11:11
Hi Michael

Did you set the properties on the project or just the file? Did you set the "treat double as float" you are using

a = 22.3;

rather than

a = 22.3f;

Regards

Michael
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MLC Michael Lamber

October 24, 2011 11:24
Hello Michael,

I tried 22.3 and 22.3f.

I set the settings on the project
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Michael Johnson

October 24, 2011 11:56
Hi MIchael,

I can't reproduce this - could you attach the .hzp file to the ticket.

Regards

Michael
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MLC Michael Lamber

October 24, 2011 12:00
Here is the zip-file.
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Michael Johnson

October 24, 2011 12:21
Hi Michael

You have set the FP-ABI to be softFP on main.c. I find that displaying the properties in the project explorer is a good way to see what property values are set.

Regards

Michael
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MLC Michael Lamber

October 24, 2011 12:22
Works

Thank

Michael
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