Q2686 UART Buffer size

[awneil]

@aezakmi

In ADL user guide[v6.30] , they mentioned , UART receive buffer can receive maximum 120bytes.

Where, exactly, in the ADL USer Guide did you read that?

I think you are confusing the UART (hardware) with the Flow Control Manager (FCM) - an ADL service?

This has nothing to do with the UART hardware - it is in the nature of how FCM gathers received bytes to be delivered to the Data Handler.

It would be very inefficient if FCM were to make a Data Handler call on every single received byte…!

while receiving, where we need to change the maximum level to 120 from 56.

No, you do not need to - and you can’t, anyhow!

You must write your code to receive the data in whatever arbitrarily-sized “chunks” FCM decides to deliver it in!

I gone through the previous posts related to almost same question, like viewtopic.php?f=109&t=4843&p=19774&hilit=fcm#p19774

When referencing a post, you need to post the full URL - it is the forum that abbreviates it when it automatically converts it to a clickable link. (in MS IE, right-click the link, and choose ‘Copy Shortcut’).
I take it you mean this: FCM and WIP - #10 by awneil

can not get where to mention the maximum bytes

Isn’t it clear in that post:

@I

The FCM data handler tells you precisely how many characters it is passing to you - you have to design your handler to accept one or more bytes at a time.

Again, You must write your code to receive the data in whatever arbitrarily-sized “chunks” FCM decides to deliver it to you!

See also: Send data fromQ2686 to microncontroller through uart2 - #6 by awneil

Your code must cope with the data being delivered in arbitrarily-sized “fragments”

And: FCM Newby - #5 by awneil

It’s possible [likely] that a response will be delivered in more than one Data event; so you will need some sort of state machine to collect response bytes until you get a complete response - but that’s no different to what you’d do on a “normal” microcontroller.