S32K144 FTM Interrupt

1416899748 — Fri, 15 Nov 2019 10:26:23 GMT

Hello, please trouble you again, may I ask to finish the FTM interrupt, let the LED flash, I don't know what is wrong with my code, the phenomenon is that the LED light is always on, thank you

#include "S32K144.h" /* include peripheral declarations S32K144 */
#include "s32_core_cm4.h"

void WDOG_disable (void)
{
WDOG->CNT=0xD928C520; //解锁看门狗
WDOG->TOVAL=0x0000FFFF; //把时间配置为最大
WDOG->CS = 0x00002100; //关闭看门狗
}

void SOSC_init_8MHz(void)
{
SCG->SOSCDIV=0x00000101; //SOSCDIV1 & SOSCDIV2 =1: 分频/1
SCG->SOSCCFG=0x00000024; //Range=2: 选择晶体振荡器的中频范围 (SOSC 1MHz-8MHz)
// HGO=0: 控制晶体振荡器的工作功率模式 --低功率模式
// EREFS=1: 外部参考选择OSC内部晶体振荡器
while(SCG->SOSCCSR & SCG_SOSCCSR_LK_MASK); //等待SOSCCSR解锁寄存器解锁后才可写入
SCG->SOSCCSR=0x00000001; // LK=0: SOSCCSR可以写
// SOSCCM=0: 系统OSC时钟监视器被禁用
// SOSCEN=1: 启用系统OSC
while(!(SCG->SOSCCSR & SCG_SOSCCSR_SOSCVLD_MASK)); //等待系统OSC成功启用，输出时钟有效
}

void SPLL_init_160MHz(void)
{
while(SCG->SPLLCSR & SCG_SPLLCSR_LK_MASK); //等待SPLLCSR寄存器解锁寄存器解锁后才可写入
SCG->SPLLCSR = 0x00000000; // LK=0: SPLLCSR可以写入
// SPLLEN=0: SPLL禁用
SCG->SPLLDIV = 0x00000302; // SPLLDIV1 分频/2; SPLLDIV2 分频/4
SCG->SPLLCFG = 0x00180000; // PREDIV=0: 锁相环参考时钟分频因子
// MULT=24: SPLL时钟频率的乘法因子
// SPLL_CLK = 8MHz / 1 * 40 / 2 = 160 MHz SPLL_CLK = (VCO_CLK)/2 VCO_CLK = SPLL_SOURCE/(PREDIV+1)*(MULT+16)
while(SCG->SPLLCSR & SCG_SPLLCSR_LK_MASK); //等待SPLLCSR寄存器解锁寄存器解锁后才可写入
SCG->SPLLCSR = 0x00000001; // LK=0: SPLLCSR可以写入
// SPLLCM=0: SPLL时钟监视器被禁用
// SPLLEN=1: 开启SPLL
while(!(SCG->SPLLCSR & SCG_SPLLCSR_SPLLVLD_MASK)); //等待SPLL成功启用，输出时钟有效
}

void NormalRUNmode_40MHz (void)
{
SCG->RCCR=SCG_RCCR_SCS(6) // SPLL做为系统时钟源
|SCG_RCCR_DIVCORE(0b11) // DIVCORE=3, 分频/4: Core clock = 160/4 MHz = 40 MHz
|SCG_RCCR_DIVBUS(0b11) // DIVBUS=3, 分频/4: bus clock = 160/4 MHz = 40 MHz
|SCG_RCCR_DIVSLOW(0b111); // DIVSLOW=7, 分频/8: SCG slow, flash clock= 160/8 MHz = 20MHZ
while (((SCG->CSR & SCG_CSR_SCS_MASK) >> SCG_CSR_SCS_SHIFT ) != 6) {}//等待系统时钟源成功选择SPLL
}

void FTM2_init_40MHZ(void)
{
PCC->PCCn[PCC_FTM2_INDEX] &= ~PCC_PCCn_CGC_MASK; //禁止FTM2时钟
PCC->PCCn[PCC_FTM2_INDEX] |= PCC_PCCn_PCS(0) | PCC_PCCn_CGC_MASK;//时钟关闭，可以启动外部时钟

FTM2->MODE |= FTM_MODE_WPDIS_MASK; //写保护禁用
FTM2->MODE |= FTM_MODE_FTMEN_MASK; //FTM使能开始写寄存器
FTM2->SC = 0;//清除状态寄存器
FTM2->SC |= FTM_SC_TOIE_MASK | FTM_SC_PS(0);// 计数器溢出中断分频因子选择 000b Divide by 1
FTM2->SC &= ~FTM_SC_TOF_MASK;//清除计数器溢出标志

FTM2->COMBINE = 0x00000000;//DECAPENx, MCOMBINEx, COMBINEx=0
FTM2->POL = 0x00000000; //设置通道输出的极性
FTM2->CNTIN = 0;
FTM2->MOD = 2560 -1; //设置计数器终止值配置中断时间 2560 *2ctr_clks* 0.025 = 128us
/* FTM3 Period = MOD-CNTIN+0x0001 ~= 2 ctr clks */
/* 40MHz / 1 = 40MHz 1/40MHZ = 0.025us */
FTM2->SC |= FTM_SC_CLKS(62); //选择时钟源
}
void GPIO_Init(void)
{
/*******LED——RUN端口配置*******/
PCC->PCCn[PCC_PORTD_INDEX] |= PCC_PCCn_CGC_MASK; //使能PTD端口时钟
PTD->PDDR |= (1<<12); //配置PTD12为输出端口
PORTD->PCR[12] = 0x00000100; //配置PTD12为GPIO，不使用其他复用功能
PTD->PDOR &= ~(1<<12); //PTD12输出低电平

}

void FTM2_NVIC_init_IRQs (void)
{
S32_NVIC->ICPR[1] = 1 << (116 % 32); /* IRQ122-FTM0 ch0: clr any pending IRQ*/
S32_NVIC->ISER[(uint32_t)(FTM2_Ovf_Reload_IRQn) >> 5U] = (uint32_t)(1UL << ((uint32_t)(FTM2_Ovf_Reload_IRQn) & (uint32_t)0x1FU));
S32_NVIC->IP[116] = 0xb; /* IRQ122-FTM0 ch0: priority 10 of 0-15*/
}

int main(void)
{
WDOG_disable(); //关闭看门狗
SOSC_init_8MHz(); //配置系统振荡器为外部8MHZ
SPLL_init_160MHz(); //使用SOSC 8MHZ配置SPLL 为160 MHz
NormalRUNmode_40MHz(); //配置系列时钟40MHz, 40MHz总线时钟

FTM2_init_40MHZ(); //配置FTM2 定时中断 128us
FTM2_NVIC_init_IRQs(); //配置FTM3中断优先级
GPIO_Init();

//for(;;)
//PTD->PDOR |= 1<<12;
if(FTM2->SC &= ~FTM_SC_TOF_MASK)
{
PTD->PDOR |= 1<<12;
}
if(FTM2->SC |= FTM_SC_TOIE_MASK)
{
PTE->PDOR &= ~(1<<12);
}

return 0;
}
//void FTM2_Ovf_Reload_IRQHandler (void)
//{
// //产生FTM2中断
// FTM2->SC &= ~FTM_SC_TOF_MASK; //清除中断标志
//}

Re: S32K144 FTM Interrupt

victorjimenez — Fri, 22 Nov 2019 20:00:27 GMT

Hello,

You can refer to the example ftm_periodic_interrupt within the SDK. This project does exactly what you are trying to achieve, you can use this as a base to see what you are missing on your project that is causing the error you are seeing.

Have a great day,

Victor

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