pwm synchronization fail using Kinetis Flextimers

pliqy666 — Tue, 12 Feb 2019 04:53:07 GMT

你好!
我需要将FTM0和FTM2同步,使用软件触发始终不成功,不知啥原因?代码如下:
   // FTM2 配置
SIM->PINSEL &= ~SIM_PINSEL_FTM2PS2_MASK; // 0  T22--PTC2 PWT_IN0
//SIM->PINSEL |= SIM_PINSEL_FTM2PS2_MASK; // 1  T22--PTC4 PWT_IN0
//SIM->PINSEL |= SIM_PINSEL_FTM2PS3_MASK; //T23--PTC5
SIM->PINSEL &= ~SIM_PINSEL_FTM2PS3_MASK; //T23--PTC3

SIM->SCGC |= SIM_SCGC_FTM2_MASK;
FTM2->SC = 0x0; // CLKS为0，关计数器
//FTM2->CONF |=0xC0; //DBM 11

FTM2->MOD = 959; //50KHz 20*48-1
FTM2->CNTIN=0;
//FTM2->DEADTIME |= 0xF;
FTM2->SC &= ~FTM_SC_CPWMS_MASK; //向上或中心对齐模式选择 ,选向上模式

FTM2->CONTROLS[0].CnV  = 300;
FTM2->CONTROLS[1].CnV  = 600;
FTM2->CONTROLS[2].CnV = 300;
FTM2->CONTROLS[3].CnV = 600;
FTM2->CONTROLS[4].CnV = 0;
FTM2->CONTROLS[5].CnV = 500;
FTM2->CNT=0;
FTM2->SC |= 0x8; //系统时钟，直通

FTM2->SYNCONF |= 0x380; //软件触发
FTM2->SYNC |= 0x4;

void FTM0_Isr(void)
{

FTM2->CONTROLS[4].CnV = 0;
FTM2->CONTROLS[5].CnV = 300;
FTM2->PWMLOAD |=0x200; //使能更新值加载
FTM2->SYNC |= 0x80; //软件触发同步
}
FTM0是计数器为0时发生中断,在中断程序中软件触发FTM2计数器回0,但无法实现.

Re: pwm synchronization fail using Kinetis Flextimers

Robin_Shen — Tue, 26 Feb 2019 09:27:18 GMT

同样的问题，在帖子PWM Synchronization Using Kinetis Flextimers讨论吧

topic Re: pwm synchronization fail using Kinetis Flextimers in Kinetis Microcontrollers

pwm synchronization fail using Kinetis Flextimers

Re: pwm synchronization fail using Kinetis Flextimers