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我已经编写了一个代码,该笔记本从笔记本电脑获取两位数字,并将PWM占空比更改为该数字。这是我需要通过UART控制电机速度的更大要求的一部分。使用笔记本电脑控制MSP430 PWM
#include "io430g2553.h"
#include <stdint.h>
void PWM(uint8_t duty_cycle);
void PWM_Config();
int main(void)
{
// Stop watchdog timer to prevent time out reset
WDTCTL = WDTPW + WDTHOLD;
WDTCTL = WDTPW + WDTHOLD;
BCSCTL1 = CALBC1_1MHZ; // Run at 1 MHz
DCOCTL = CALDCO_1MHZ; // Run at 1 MHz
PWM_Config();
PWM(5);
__delay_cycles(5000000);
PWM(15);
__delay_cycles(5000000);
PWM(25);
__delay_cycles(5000000);
PWM(50);
__delay_cycles(5000000);
PWM(25);
__delay_cycles(5000000);
PWM(15);
__delay_cycles(5000000);
PWM(5);
while(1)
{}
}
void PWM_Config()
{
P1OUT &= 0x00; // Clearing P1OUT
P1SEL |= BIT6 ;
P1SEL2 &= ~BIT6 ;
P1DIR |= BIT6; // Configuring P1.6 as Output
}
void PWM(uint8_t duty_cycle)
{
TA0CTL =0;
TA0CTL |= TACLR;
TA0CCR1 |= (duty_cycle*100);
TA0CCR0 |= 10000;
TA0CTL |= TASSEL_2 + MC_1 + ID_0;// Register TA0CTL -> SMCLK/8, Up mode
TA0CCTL1 |= OUTMOD_7 ;//Set/Reset Mode
TA0CCTL0 &= ~CCIE; // Interrupt Disabled}
与空隙PWM(uint8_t DUTY_CYCLE)函数是第一次它产生在P1.6正确的PWM,下,如果它被给予它改变PWM到DC的值的问题,但是我不能回到较低的DC。
代码中的fisrt 2 PWM功能发生改变以更正占空比PWM(5),PWM(15),然后其余PWM值不会产生所需占空比。
我无法解决我错在哪里,可以帮助吗?
感谢