Using the uart on the USB developper kit.

Cor,

The SCI connected to the FTDI is not used at all for emulation.

If you need to use this SCI port, it is available for the end user.

I often use it with a windows terminal when I want to log stuff out of the micro. (via a USB/COM port)

Which board/part are you using?

That is great!

I use the RM4 USB evaluation board.

Hello Jean-Marc,

I did study the help files available at CCS. I understand that I can remap the low level IO functions.

But it is not clear to me what exactly to do to remap the stdout en stdin functions to the uart.

Could you please share this information with me? Could you show an example? I'm sure a lot of people would like to do that.

Cor,

I've created a quick project that demonstrate the use of SCI port to perform printf function. 1830.Printf_Serial.zip

The key element is the file "retarget.c". In this file, the standard fputs and fputc used by printf are re-defined to use the SCI driver.
The SCI driver and  code initialization are generated using HalCoGen.

The CCS5 and HalCogen project are included in the zip file.

Cor,

I forgot to provide some additional comments on how it works.

The file retarget.c has conditional code. It is necessary in the project compiler options to set the symbol "UART_SUPPORT" in order to use the SCI port for printf.
Other case, the printf will still print in the console within CCS.

The serial port is setup has:

115200 bits per second, 8 data bits and 1 stop bit. Of course this can be changed in HalCogen driver for SCI2.

Thanks

But I have a problem when importing the CCS project. It says ''compiler definition not available'' and I need to install ARMv5.1.

I can not find out how to check which version is installed.

And I do not know where to get the correct version.

Cor,

Sorry for this problem.

Can you tell me which version of CCS and code gen tools (compiler) you are using?

I will re-create the project with the same environment.

On my side, I used for this project a Alpha version of the compiler and this is the reason why it is not working for you.

Again sorry.

CCS 5.2.1 (is this also the compiler version?)

HalCoGen 3.01.01

Cor,

The release number you provided me is for Code Composer Studio.

To find out what compiler is install on your system, please follow these instructions.

In CCS, open a project and right click on it to select: Resource->General

Under Advanced Settings, open Compiler version. This will list all version of the compiler.
Send me this information and I will re-package the project.

it is TI v4.9.5

Where can I found others or newer versions?

To update CCS, go to the help menu and click on install new software.
Click on Work with and select all available sites.
Select TI Compiler Update, unclick show only the latest version of available software and select the version you want to install.

The latest version for the compiler is V5.0.0

I recommend using this release. A lot of improvement in term of code size and code execution is part of this release, with a better support for FPU.

Hellop Jean-Marc,

I updated the compiler to 5.0.0 as you suggested.

When importing your Serial Demo project, it still aborts with the message that I need compiler 5.1

For existing projects I now can select the 5.0.0 compiler so the update succeeded.

If I need 5.1, where can I find it? It was not in the list of available versions.

Cor,

Here is attached the new version for the project. This time I'm using CGT 5.0.0

6102.Printf_Serial.zip

The version 5.1 I was using before is a beta version and it can't be distributed yet.

Hi again

I still have the problem that when importing the project that it wants compiler version 5.1.

So I made a new project (using compiler 5.0.0), and copied your files into it. Compiled it and run it on the USB evaluation board.

I get the printf() message on the CSS console, but I do not see it on the terminal program that connects to the correct COM port.

I could not figure out if the software writes to the SCI port or LIN port. The USB evaluation board does not have SCI connected.

So it should be the LIN interface. Is that correct?

I think copying all your files into my projects was not a good idea.

So I created a new CSS project plus a new HalCoGen project and generated all files again.

I only copied the Retarget.c file from your example.

Everything compiles. But when I run it I do not get the printf text on Console or on COM device.

So something is not correct. When trying to step into the printf function with the debugger. It seems to skip it. Or the source is not available and I can not step into?

I attached the project. I hope you can tell me what I did wrong.6327.MySerialIO.zip

Copying the file was not a good idea. So I made a new project from scratch. Using yours as an example.

This way I got the serial uart communication finally to work.