Loop 250 Khz

[nycoly.bg]

Hello to all.
Some would have an example of as to generate 250Khz alternating.
Using PIC16F873A and Crystal 20Mhz And WatDog is Enable.
Only test.
Example:

Code: Select all

Loop: 
High PORTB.7 
Low PORTB.6
Low PORTB.7
PORTB.6 
Goto Loop

[Benj]

Hello

You could use a C code block with the following code.

Code: Select all

while(1)
{
bit_set (portb, 7);
bit_clear(portb, 6);
bit_clear(portb, 7);
bit_set (portb, 6);
clear_wdt();
}

[nycoly.bg]

No works...

Iam don't understand definition fuses and configuration in FlowCode.
Using Menu - > Configuration ( Expert ) no define configuration also PicBasic

Proton PICBASIC Code... Works... 250Khz

Code: Select all

Device=16F873A
Declare XTAL=20
@CONFIG_REQ
@__CONFIG PWRTE_ON & WDT_ON & HS_OSC & LVP_OFF

TRISB = %00000000
freq:
    High    PORTB.7
    Low     PORTB.6
    
    Low     PORTB.7
    High    PORTB.6
GoTo freq

[Benj]

Hello

The configuration screen in Flowcode replaces these line of code.

@CONFIG_REQ
@__CONFIG PWRTE_ON & WDT_ON & HS_OSC & LVP_OFF

So basically you want a HS oscillator mode with the Watchdog on and LVP off. Other settings are up to you.

[nycoly.bg]

Not meeting where to modify… you it would have an example?

[Benj]

Hello

In the basic configuration screen you would want the Xtal mode and watchdog On.

In the advanced configuration you would want something similar to the following.

Osc - Hs
Watchdog - On
Power Up Timer - Off
Brown Out Detect - Off
Low Voltage Program - Off
Flash Write - Off
Background Debug - Disabled
Data EE Protect - Off
Code Protect - Off