MSP430FR57XX系列MCU的TIMERB实现PWM功能的例子
void main(void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop WDT
CSCTL0_H = 0xA5;
CSCTL1 |= DCOFSEL0 + DCOFSEL1; // Set max. DCO setting =8MHz
CSCTL2 = SELA_3 + SELS_3 + SELM_3; // set ACLK = SMCLK = DCO/8
CSCTL3 = DIVA_3 + DIVS_3 + DIVM_3; // set all dividers
P1DIR |= BIT4+BIT5; // P1.4 and P1.5 output
P1SEL0 |= BIT4+BIT5; // P1.4 and P1.5 options select
TB0CCR0 = 1000-1; // PWM Period
TB0CCTL1 = OUTMOD_7; // CCR1 reset/set
TB0CCR1 = 750; // CCR1 PWM duty cycle
TB0CCTL2 = OUTMOD_7; // CCR2 reset/set
TB0CCR2 = 250; // CCR2 PWM duty cycle
TB0CTL = TBSSEL_2 + MC_1 + TBCLR; // SMCLK, up mode, clear TAR
__bis_SR_register(LPM0_bits); // Enter LPM0
__no_operation(); // For debugger
} |
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