PWMG6

Pulse width modulation. More...

Files
file	PWMG6.h
	Pulse width modulation.

Macros
#define	PWMUSELFCLK   2
	use PWMUSELFCLK to select LFCLK
#define	PWMUSEMFCLK   4
	use PWMUSEMFCLK to select MFCLK
#define	PWMUSEBUSCLK   8
	use PWMUSEBUSCLK to select bus CLK

Functions
void	PWMG6_Init (uint32_t timerClkSrc, uint32_t timerClkPrescale, uint32_t period, uint32_t duty)
	Initialize PWMG6. More...
void	PWMG6_SetDuty (uint32_t duty)
	Set duty cycles. More...

Detailed Description

Pulse width modulation.

PWM pins on the MSPM0G3507

Pin	Description
PB6	CCP0 PWM output

Function Documentation

PWMG6_Init()

void PWMG6_Init	(	uint32_t	timerClkSrc,
		uint32_t	timerClkPrescale,
		uint32_t	period,
		uint32_t	duty
	)

Initialize PWMG6.

Initialize PWMG6 output on PB6. Rising edge synchronized. timerClkDivRatio = 1. Once started, hardware will continuously output the waves.

• timerClkSrc =
  • 2 for 32768 Hz LFCLK
  • 4 for 4MHz MFCLK (not tested)
  • 8 for 80/32/4 BUSCLK
• A0/A1 is on Power domain PD1
  • 32MHz bus clock, BUSCLK clock is 32MHz
  • 40MHz bus clock, BUSCLK clock is ULPCLK 20MHz
  • 80MHz bus clock, BUSCLK clock is ULPCLK 40MHz
• PWMFreq = (timerClkSrc / (timerClkDivRatio * (timerClkPrescale + 1) * period))
  • For example, source=LFCLK, prescale = 0, period = 1000, PWM frequency = 32.768 Hz
  • For example, source=BUSCLK, 80MHz bus, prescale=39, period = 40000, PWM frequency = 50Hz (20ms)

Parameters

timerClkSrc	is 2 4 or 8
timerClkPrescale	divide clock by timerClkPrescale+1, 0 to 255
period	sets the PWM period
duty	sets the duty cycle on PB6

Returns

none

Note

Will call LaunchPad_Init to reset and activate power

See also

PWMG6_SetDuty

PWMG6_SetDuty()

void PWMG6_SetDuty

(

uint32_t

duty

)

Set duty cycles.

Set duty cycles on PB6.

Parameters

duty	sets the duty cycle on PB6 (high time)

Returns

none

Note

assumes PWMG6_Init was called

See also

PWMG6_Init