Skip incoming bytes in SERIN

[Alexey]

Hi Guys,

Could someone advise please how can I skip some bytes when read a stream using SERIN? The chip I use does not support serin2 or hserin and it's program memory is too small, but I noticed that skipping bytes by using something like
SERIN PORT,MODE,["CHAR"],BYTE,BYTE,BYTE,BYTE,BYTE,BYTE,BYTE,BYTE
uses too much program memory for skipping bytes. Is there a better way?

Thank you,
Alexey

[mackrackit]

Welcome to the forum.

The chip I use does not support serin2 or hserin

What chip are you using?
It may not have a USART but I can not think why SERIN2 would not work on any chip.

[Alexey]

Hi Mackrackit,

Thank you.

It is PIC16HV540.

it has only 512 words of program memory, 25 bytes or RAM (enough for only three variables) and nothing else. BUT it is 15 volt chip including full 8 bit 15 volt port B (actually I use only two lines of them)

[mackrackit]

It is PIC16HV540.

it has only 512 words of program memory, 25 bytes or RAM (enough for only three variables) and nothing else. BUT it is 15 volt chip including full 8 bit 15 volt port B (actually I use only two lines of them)

Oh....
I will need to think about that one...

[mackrackit]

This is interesting. I have never used a chip this "small"....

What does the data stream look like and what part do you want to skip? Then what do you want to do with it?

[Alexey]

it is a repeating string and the bytes I need are located 9 bytes after symbol 85. Ideally there are 7 bytes I want to know but I have room only for three variables, so I may have to read them one by one every next sycle or use only the first one as it is most important and I only need to ignite a warning LED at certain read value. Now I do it this way:
SERIN PORTB.3,T2400,4000,CLR,[85],VAR,VAR,VAR,VAR,VAR,VAR,VAR,VAR,VAR,VAR

Skipping 9 bytes cost me 45 words of memory which is near 9% of what I have totally

Yes, this chip is very small, but I could not find another one with at least one 15 volt port (regular or open drain) to read and write serial data directly