1、MSP430-pw訪波占空比頻率可調*/ MSP430 Blink the LED Demo - Software Toggle P1.0 /of a/ Description; Toggle P1.0 by xoring P1.0 inside software loop./ ACLK = n/a, MCLK = SMCLK = default DCO/MSP430x5xx/|XIN|-/|/-|RSTXOUT|-/|/|P1.0|-LED/J. Stevenson/ Texas Instruments, Inc/ July 2011 / Built with Code Composer S

2、tudio v5H*#include #include tm1638.hunsigned char LED_CODE口 =0x3F, 0x06, 0x5B, 0x4F, 0x66, 0x6D, 0x7D, 0x07, 0x7F, 0x6F,0x77, 0x7C, 0x39,0x5E, 0x79, 0x71 ;float i=1000,j=500;int main(void)float a,b;WDTCTL = WDTPW + WDTHOLD;/ Stopwatchdog timerif (CALBC1_1MHZ = 0xFF | CALDCO_1MHZ = 0xFF)while (1); /

3、If calibration constants erased, trap CPU!BCSCTL1 = CALBC1_1MHZ; Set rangeDCOCTL = CALDCO_1MHZ; / Set DCO step + modulationBCSCTL2 = SELM_1 + DIVS_3; /set MCLK=DOC/8P1DIR |= 0x01;/ Set P1.0 tooutput direction/引腳設置(暫時使用P1.2輸出一路PWM)P1SEL |= BIT6;/TA1 從 P1.6 輸出P1DIR |= BIT6;/TA1 從 P1.6 輸出P2DIR |= 0xff;

4、P2OUT |= 0XFF;TACTL |= MC_1 +TASSEL_2+ID_0; / 時鐘 源選擇 SMCLK ,增計數模式 TA設置TACCTL1 = OUTMOD_7; / 模式 7 高電平 PWM 輸出 PWM設置init_TM1638();for(;)TACCR0 = i;TACCR1 = j;if(Read_key()=0)while(Read_key()=0);i=i+10;/調頻率j=b*i/100;)if(Read_key()=1)(while(Read_key()=1);i=i-10;/ 調頻率j=b*i/100;)if(Read_key()=2)(while(Read

5、_key()=2);j=j+10;/調占空比)if(Read_key()=3)(while(Read_key()=3);j=j-10;/調占空比)b=j*100/i; / 占空比Write_DATA(0x00, LED_CODE(int)b/10);Write_DATA(0x02, LED_CODE(int)b%10|0x80);Write_DATA(0x04, LED_CODE(int)(b*10)%10);a=1000000/(8.0*i);/ 頻率Write_DATA(0x08, LED_CODE(int)a/100);Write_DATA(0x0a, LED_CODE(int)a/10%10);Wri