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PIC16F1939

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georpo

Joined: 18 Nov 2008
Posts: 281
Location: Athens, Greece.

PIC16F1939

Posted: Sat Sep 29, 2018 10:51 am

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Hello,

I am using a PIC16F1939 and command:

Code:

set_tris_a (0b00111001);

gives this in disassembly listing:

Code:

set_tris_a (0b00111001);
0003 3039 MOVLW 0x39
0004 0065 TRIS 0x5

Register TRISA is at address 0x08C and not 0x05.

Am I missing sometjing here?

Thanks!
_________________
George.

Ttelmah

Joined: 11 Mar 2010
Posts: 19520

Posted: Sat Sep 29, 2018 12:45 pm

Reply with quote

Look up the TRIS command in the data sheet. It is not the same as a standard move.

Quote:

When ‘f’ = 5, TRISA is loaded.
When ‘f’ = 6, TRISB is loaded.
When ‘f’ = 7, TRISC is loaded.

From the data sheet entry for this command.

georpo

Joined: 18 Nov 2008
Posts: 281
Location: Athens, Greece.


Posted: Sat Sep 29, 2018 12:51 pm

Thanks for that! _________________ George.

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