weird problem with pic16f886

[andreluizeng]

Hi people,

I was working on pic16f886 and i a weird problem happened.

the weak pullups on PORT_B just didnt work with PIN_B0 and PIN_B1.

I configured the pins as digital I/O and set the pullups with the following code:

[PCM programmer]

Post your compiler version.

[andreluizeng]

IDE 4.032
PCB 4.032
PCM 4.032
PCH 4.032
_________________
Andre

[PCM programmer]

The CCS start-up code has a lot of problems in your version. However,
that's not the main cause of your problem.

In your version, the Port B pullups can be individually enabled or disabled
for every pin in Port B. So you shouldn't use TRUE or FALSE with the
port_b_pullups() function. You should use a bitmask. Set a bit = 1
to enable a pullup, and set a bit = 0 to disable it. This is explained in
the 16F886 and the CCS manual. Because 'TRUE' is defined as 0x01,
when you do this you are really only enabling the pullup on pin B0:

[andreluizeng]

PCM, i got your point... but before I use port_b_pullups function, I directly set the register WPUB with 0xFF value, and it didnt work too. Probably I made something wrong.

however, I will try your sugestion.

thanks

regards.
_________________
Andre