Mikroelektronika MIKROE-724 Scheda Tecnica
434
mikoBasic PRO for dsPIC30/33 and PIC24
MikroElektronika
PWM_Start
PWM_Stop
Prototype
sub procedure PWM_Start(dim enable_channel_x as byte)
Description Starts PWM at requested channel.
Parameters -
Parameters -
enable_channel_x
: number of PWM channel
Returns
Nothing.
Requires
MCU must have the HW PWM Module.
PWM channel must be properly configured. See the PWM_Init and PWM_Set_Duty routines.
Example
‘ start PWM at channel 1
PWM_Start(1)
Notes
Number of available PWM channels depends on MCU. Refer to MCU datasheet for details.
Prototype
sub procedure PWM_Stop(dim disable_channel_x as byte)
Description Stops PWM at requested channel.
Parameters -
Parameters -
disable_channel_x
: number of PWM channel
Returns
Nothing.
Requires
MCU must have the HW PWM Module.
Example
‘ stop PWM at channel 1
PWM_Stop(1)
Notes
Number of available PWM channels depends on MCU. Refer to MCU datasheet for details.
Library Example
The example changes PWM duty ratio on channels 1 and 2 continuously. If LEDs are connected to channels 1 and 2,
a gradual change of emitted light will be noticeable.
Copy Code To Clipboard
program Pwm_Demo
dim current_duty, old_duty, current_duty1, old_duty1 as word
pwm_period1, pwm_period2 as word
sub procedure InitMain()
ADPCFG = 0xFFFF ‘ initialize AN pins as digital
TRISB = 0xFFFF ‘ configure PORTB pins as input
PORTD = 0 ‘ set PORTD to 0
TRISD = 0 ‘ designate PORTD pins as output
end sub
main:
InitMain()
current_duty = 16 ‘ initial value for current_duty
current_duty1 = 16 ‘ initial value for current_duty1