HSERIN / SERIN Problem with 16f690

[rborsuk]

Skimask,
Okay, I put in your program. The light blinks once (when I release from reset - I don't touch anything), no character is displayed and that's it. I tried putting a HSEROUT before your main loop and it does send out a character. Any thoughts about turning off the built in analog stuff?


Rob

[skimask]

Skimask,
Okay, I put in your program. The light blinks once (when I release from reset - I don't touch anything), no character is displayed and that's it. I tried putting a HSEROUT before your main loop and it does send out a character. Any thoughts about turning off the built in analog stuff?

My bad...yes, turn off all of the analog ports...everything over to digital.

Include "modedefs.bas"
DEFINE OSC 3
DEFINE HSER_RCSTA 90h
DEFINE HSER_TXSTA 24h
DEFINE HSER_SPBRG  92
DEFINE HSER_CLROERR 1
cm1con0 = 0 : cm2con0 = 0 : ansel = 0 : anselh = 0
Char VAR BYTE : led var portb.6 : output led : input portb.5 : output portb.7
led=1 : pause 500 : led=0 : pause 500 : led=1 : pause 500 : led=0 : pause 500
Main: HSERIN [Char] : led = 1 : HSEROUT [Char] : pause 10 : led = 0 : GOTO Main
END

[mackrackit]

Are you sure the PIC is running? Try a quick "blinky" without any serial stuff.

[rborsuk]

Mackrackit,
Yep, it's running. Follow the rest of my reply.
Skimask,
Sorry for the delay. I wanted to try some additional things. I'll explain in a bit. I tried the new code. It produces two long flashes on the LED and one very quick one. It then does nothing. No characters are displayed on the terminal and I can't enter anything. Thinking that it might be something else, I traded out the Max232 with a Max233 (eliminated the caps and such). Same results. I then tried a new 16F690 (thinking that the other one might have been damaged), same results. Anything we're missing here?

Rob

[mister_e]

Floating MCLR?
LVP is OFF?
Noisy PSU?
Poor contact, low battery, are some other great tests..

You could also begin your program with something like...

START:
        HSEROUT ["1,2,1,2 TESTING....",13,10]
        FOR MyVAR=0 TO 250
                HSEROUT ["MyVAR=",#MyVAR,13,10]
                NEXT
        GOTO START

[skimask]

Does the F690 run from the external crystal by default?
Try removing DEFINE OSC 3 and see what happens.

[mister_e]

default config line is...

 device  pic16F690, intrc_osc_noclkout, wdt_on, mclr_on, protect_off

We don't see any config fuse setting here, so this would make some sense...

[rborsuk]

This is my config line

 __config _XT_OSC & _WDT_ON & _MCLRE_ON & _CP_OFF

Rob