CCS/AM4377: What should I write in place of someUART_configIndexValue?

Vivek Kulkarni

Prodigy 180 points

Part Number: AM4377

Tool/software: Code Composer Studio

I'm using AM4377 board manufactured by MYIR (MYD-C4377-4E512D-100-I-PRU)

Tools:Code Composer Studio 7.0.0.00042

XDS100v3

SYS/BIOS 6.73.1.01

XDCtools 3.50.8.24_core

am437x PDK 1_0_13

SDK RTOS 5.02

I want to implement UART communication on AM4377.

I followed the steps form

I've set the baudrate to 115200. Here is my code:

#include <stdio.h>
#include <ti/drv/uart/UART.h>
#include <ti/board/board.h>
int main(void)
{
UART_Handle handle;
UART_Params params;
UART_init();
Board_initCfg boardCfg;
Board_init(boardCfg);
UART_Params_init(&params);

params.baudRate = 115200;
params.writeDataMode = UART_DATA_BINARY;
params.readDataMode = UART_DATA_BINARY;
params.readReturnMode = UART_RETURN_FULL;
params.readEcho = UART_ECHO_OFF;
params.dataLength = UART_LEN_8;
params.writeMode = UART_MODE_BLOCKING;

handle = UART_open(someUART_configIndexValue, &params); -------->" someUART_configIndexValue"

if (!handle)
{
System_printf("UART did not open");
}

const unsigned char hello[] = "Hello World\n";
char ret = UART_write(handle, hello, sizeof(hello));
System_printf("The UART wrote %d bytes\n", ret);

return 0;
}

What should I write in place of someUART_configIndexValue?

I've also looked in the UART.h file, in that file got that it's 'Logical peripheral number indexed into the HWAttrs table'; but not found what to write.

Thanks in advance.

Regards

Vivek

over 6 years ago

0 Michail Georgiev over 6 years ago

TI__Intellectual 2300 points

Hello,
please look at this thread
e2e.ti.com/.../1402155
and tell us if helpful in your case.

BR,
Michail

0 Vivek Kulkarni over 6 years ago in reply to Michail Georgiev

Prodigy 180 points

Hello Michail,

Thanks for the reply.

Yeah, it was helpful, I've gone through the link you've sent. I didn't find any board.c file in the folder neither have I found the HWAttrs table in any of the files.

Can you please just tell me what should I write in place of someUART_configIndexValue?

Also wanted to ask you is there any mistake in my code?

Regards,

Vivek

0 Michail Georgiev over 6 years ago in reply to Vivek Kulkarni

TI__Intellectual 2300 points

Hello,
value for someUART_configIndexValue should be simply a number which corresponds to your BOARD_UART_INSTANCE.
You can define it depending on which UART on your board you're using and is a int number 0, 1, 2, etc.

Michail

0 Vivek Kulkarni over 6 years ago in reply to Michail Georgiev

Prodigy 180 points

Hi Michail,
I tried putting direct values i.e. 0,1,2 in place of someUART_configIndexValue but then it gives undefined reference to each and every function I use.
Is there any different syntax for it?
Or is there any mistake in my code?
If possible can you please provide me with the example code.

Regards
Vivek

0 Michail Georgiev over 6 years ago in reply to Vivek Kulkarni

TI__Intellectual 2300 points

Hello,
example code can be found in the PDK. You mentioned your version is am437x PDK 1_0_13.
There is a code which you can include in your project and avoid writing whole code from scratch.
For example UART related source code you can find in .../pdk_am437x_1_0_13/packages/ti/drv/uart/test/src/main_uart_test.c

Hope this helps,
Michail

0 Vivek Kulkarni over 6 years ago in reply to Michail Georgiev

Prodigy 180 points

Hello Michail,
Sorry for the late reply!
I'm getting just one error when I build the code you mentioned.
=>'BOARD_UART_INSTANCE' undeclared (first use in this function)
what might be wrong in the code?or should I write something else in place of 'BOARD_UART_INSTANCE'?

Regards
Vivek

0 Michail Georgiev over 6 years ago in reply to Vivek Kulkarni

TI__Intellectual 2300 points

Hello,
you should declare (give a number) to the instance. Perhaps in header files for your board there is no definition about it.
For example you can #define BOARD_UART_INSTANCE (0U) or #define BOARD_UART_INSTANCE 2, etc.

BR
Michail

0 Vivek Kulkarni over 6 years ago in reply to Michail Georgiev

Prodigy 180 points

Hello Michail,
Thanks for the quick reply.
Yeah...I've tried that thing; but then it gives undefined reference to the used functions.
Here's what I get:
undefined reference to `Board_init'
undefined reference to `System_printf'
undefined reference to `UART_init'
undefined reference to `UART_open'
undefined reference to `UART_Params_init'
undefined reference to `UART_write'

Here is my code; please let me know if there is any mistake:
#include <stdio.h>

#include <ti/drv/uart/UART.h>
#include <ti/board/board.h>
#define UART_INSTANCE (0U)
int main(void)
{
UART_Handle handle;
UART_Params params;
UART_init();
Board_initCfg boardCfg;
Board_init(boardCfg);
UART_Params_init(&params);

params.baudRate = 115200;
params.writeDataMode = UART_DATA_BINARY;
params.readDataMode = UART_DATA_BINARY;
params.readReturnMode = UART_RETURN_FULL;
params.readEcho = UART_ECHO_OFF;
params.dataLength = UART_LEN_8;
params.writeMode = UART_MODE_BLOCKING;
handle = UART_open(UART_INSTANCE, &params);
if (!handle)
{
System_printf("UART did not open");
}

const unsigned char hello[] = "Hello World\n";
char ret = UART_write(handle, hello, sizeof(hello));
System_printf("The UART wrote %d bytes\n", ret);

return 0;
}

Regards
Vivek

0 Michail Georgiev over 6 years ago in reply to Vivek Kulkarni

TI__Intellectual 2300 points

Hello,
were you able to build any of the example code contained in am437x PDK 1_0_13?
To create example PDK projects please refer to this guide

Michail

0 Vivek Kulkarni over 6 years ago in reply to Michail Georgiev

Prodigy 180 points

Hi Michail,

Thanks for the reply.

No I was not able to build any of the example except for NAND_Flashing_Tool and SPI_Flashing_Tool.

That's why I'm trying to write my own code. But no luck!

I also tried the code you suggested /pdk_am437x_1_0_13/packages/ti/drv/uart/test/src/main_uart_test.c

Same error!

I also tried rebuilding the pdk 1_0_13.

Regards

Vivek.

0 Michail Georgiev over 6 years ago in reply to Vivek Kulkarni

TI__Intellectual 2300 points

Hi,

after rebuilding the PDK according to instructions in document above you'll have many examples including UART related ones.

There are many dependencies and additional code (from CSL) included in a single app. Writing your own bare-metal code without including even RTOS for this device will be a complicated task requiring many effort. It is strongly advised for customers to use TI recommended tools. They are intended especially for that purpose - to make customer's life easy.

Michail

0 Michail Georgiev over 6 years ago in reply to Vivek Kulkarni

TI__Intellectual 2300 points

Hi,
what happens after rebuilding the PDK following the instructions in document above?

Michail

0 Vivek Kulkarni over 6 years ago in reply to Michail Georgiev

Prodigy 180 points

Hello,
After I rebuild pdk the folder MyExampleProjects is created but it is empty.
Also when I try to run pdkProjectCreate.bat AM437x idkAM437x, it gives 0 files copied.

Regards

0 Michail Georgiev over 6 years ago in reply to Vivek Kulkarni

TI__Intellectual 2300 points

Hello,

I assume that you're using Windows. There should be something wrong with your environment.

Under Linux Ubuntu 16.04 projects were created without problem, over 80 examples.

Did you run pdksetupenv.bat before creating example projects?

Michail

0 Vivek Kulkarni over 6 years ago in reply to Michail Georgiev

Prodigy 180 points

Hi,

Yes I'm using windows 7.

Yes, I've followed each and every step for building pdk even pdksetupenv.bat.

Thank you.

Vivek

0 Michail Georgiev over 6 years ago in reply to Vivek Kulkarni

TI__Intellectual 2300 points

Hello,
I still do not understand if you were able to build examples or not. Please clarify.

Michail

0 Vivek Kulkarni over 6 years ago in reply to Michail Georgiev

Prodigy 180 points

Hi,

No I'm not able to build examples.

But if I create new code then it builds and debugs successfully.

Vivek

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CCS/AM4377: What should I write in place of someUART_configIndexValue?