我正在使用和MSP430F5529开发板,一个创建的PCB和CCS进行编程。我的代码如下:
#include <msp430.h>
int main(void)
{
WDTCTL = WDTPW | WDTHOLD; //stop watchdog timer
P1SEL |= BIT2; //configure P1.2 as TA0.2
P1DIR |= BIT2; //P1.2 is output (compare mode)
P1SEL |= BIT3; //configure P1.3 as TA0.3
P1DIR |= BIT3; //P1.3 is output (compare mode)
P1SEL |= BIT4; //configure P1.4 as TA0.4
P1DIR |= BIT4; //P1.4 is output (compare mode)
TA0CCR0 = 999; //CCR0 is used to generate the desired period
TA0CCR2 = 599; //CCR2 is used to generate 0.60 duty cycle
TA0CCR3 = 299; //CCR3 is used to generate 0.30 duty cycle
TA0CCR4 = 99; //CCR4 is used to generate 0.10 duty cycle
TA0CCTL2 = OUTMOD_7; //PWM 2
TA0CCTL3 = OUTMOD_7; //PWM 3
TA0CCTL4 = OUTMOD_7; //PWM 4
TA0CTL = MC_1 + TASSEL_2 + TACLR|ID_2;
_BIS_SR(LPM0_bits+GIE);
}
没有一个LED打开使用这个代码,我不确定如何修复它。
您在裸机MCU程序中从main((返回,因此它将崩溃&在它有机会做任何有意义的事情之前燃烧。
在独立程序中编写main((最常见的方法是:
void main (void)
{
...
for(;;)
{
// kick watchdog here
...
}
}
值得注意的是,这永远不会从main((返回,而是停留在"中;"永远";环
void main (void)
是一种实现定义的形式,受到所有嵌入式系统编译器的支持。(要在gcc上使用此表单,必须使用-ffreestanding
进行编译。(