LPUART_Receive does not read size

[vinicius_olivei]

Hello all,

I'm trying to read 16 bytes from the serial interface, and I did the following comfiguration:

When I generate code, the function call is using 1 as size, and never changes:

Could you help me NXP team?

MATLAB: 2019b

NXP_MDBDToolbox_S32K1xx: 4.1.0

[mariuslucianand]

Hello vinicius.oliveira@enfas.de‌,

Even if the input is 16, the output is a single uint8_t variable. 

I was more interested about the output data type, like in the following model:

In order to achieve this, please declare a Data Store memory and adjust the following settings:

You can declare it as volatile.

Hope this helps,

Marius

[vinicius_olivei]

Hello Marius-lucian Andrei,

Yeah, that is good work around

I created a stateflow chart which packes the buffer withing start character and end character, but your idea is better.

Thanks,

Vinicius.

[constantinrazva]

Hello vinicius.oliveira@enfas.de‌,

Sorry for the late reply (was taking some time off). Thank you for reporting this issue! I will get a fix today and first post it here and in a few days on the hotfixes page for our latest release. Although the block is perfectly usable with the workaround that mariuslucianandrei‌ proposed, that is not the intended way for the block to work - you should be able to use variable length with more control than that for receiving blocks [eventhough for transfer blocks that is not the case]. I'll come back with the fix in a few!

Kind regards,

Razvan.

[constantinrazva · Accepted solution]

Hello again vinicius.oliveira@enfas.de‌,

Here's the file that you should change to make the block use the input for setting the size of the transfer (versus using the output's size to set the transfer size, as it is currently doing).

The location of the file is the following:

{ROOT}\mbdtbx_s32k\blocks\lpuart\lpuart_s32k_receive.tlc

Thank you again for reporting this issue.

Kind regards,

Razvan.

[vinicius_olivei]

Hi Constantin,

Thank you for the support and providing the hot fix. It works great.

NXP team aways helpful.

Best,

Vinicius.