三個FTM都可以，

FTM0和FTM1雖然沒有FTM_CNTIN寄存器，但是在EPWM和CPWM模式下，CNTIN開始值必須是0，不涉及到設置的問題。

你可以參考這個函數(shù)，使能PWM波輸出

uint8 FTM_PWM_Init(FTM_MemMapPtr FTM_No, unsigned char PWMModeSelect, unsigned char PWMEdgeSelect)

{

uint8_t channels, i;

/* open the clock gate */

if (FTM0_BASE_PTR == FTM_No)

{

channels = 2;

SIM_SCGC_REG(SIM_BASE_PTR) |= SIM_SCGC_FTM0_MASK;

}

else if(FTM1_BASE_PTR == FTM_No)

{

channels = 2;

SIM_SCGC_REG(SIM_BASE_PTR) |= SIM_SCGC_FTM1_MASK;

}

else if (FTM2_BASE_PTR == FTM_No)

{

channels = 6;

SIM_SCGC_REG(SIM_BASE_PTR) |= SIM_SCGC_FTM2_MASK;

}

else

return FALSE;??/* error in FTM address or channel */

FTM_SC_REG(FTM_No)??= 0x0; /* diable counter */

FTM_MOD_REG(FTM_No) = FTM_MOD_INIT;

if(FTM_PWMMODE_CENTERALLIGNED == PWMModeSelect) /* enable CPWM */

{

FTM_SC_REG(FTM_No) |= FTM_SC_CPWMS_MASK;

}

else if(FTM_PWMMODE_COMBINE == PWMModeSelect)??/* enable combine pwm mode */

{

if(FTM2_BASE_PTR == FTM_No)

{

FTM_MODE_REG(FTM_No) |= FTM_MODE_FTMEN_MASK;

FTM_COMBINE_REG(FTM_No) = FTM_COMBINE_COMBINE0_MASK | FTM_COMBINE_COMP0_MASK | FTM_COMBINE_SYNCEN0_MASK | FTM_COMBINE_DTEN0_MASK |

FTM_COMBINE_COMBINE1_MASK | FTM_COMBINE_COMP1_MASK | FTM_COMBINE_SYNCEN1_MASK | FTM_COMBINE_DTEN1_MASK |

FTM_COMBINE_COMBINE2_MASK | FTM_COMBINE_COMP2_MASK | FTM_COMBINE_SYNCEN2_MASK | FTM_COMBINE_DTEN2_MASK ;

}

else

return FALSE;??/* error, only FTM2 has the combine mode */

}

if(FTM_PWM_HIGHTRUEPULSE == PWMEdgeSelect)

{

/* Configure timers PWM High True Pulses */

for(i=0; i

{

FTM_CnSC_REG(FTM_No,i) = FTM_CnSC_MSB_MASK | FTM_CnSC_ELSB_MASK;

FTM_CnV_REG(FTM_No,i)??= FTM_C0V_INIT + i*100;

}

}

else if(FTM_PWM_LOWTRUEPULSE == PWMEdgeSelect)

{

/* Configure timers for PWM Low True Pulses */

for(i=0; i

{

FTM_CnSC_REG(FTM_No,i) = FTM_CnSC_MSB_MASK | FTM_CnSC_ELSA_MASK;

FTM_CnV_REG(FTM_No,i)??= FTM_C0V_INIT + i*100 ;

}

}

FTM_SC_REG(FTM_No) |= FTM_SC_CLKS(FTM_CLOCK_SYSTEMCLOCK);??/* system clock */

//FTM_PWMLOAD_REG(FTM_No) |= FTM_PWMLOAD_LDOK_MASK | 0x3F;

return TRUE;

}

總結(jié)

以上是生活随笔為你收集整理的php-ftm,关于KEA128中FTM0/1的问题的全部內(nèi)容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網(wǎng)站內(nèi)容還不錯，歡迎將生活随笔推薦給好友。