CC2538的sleep timer无法进入中断

yh kuang

Other Parts Discussed in Thread: CC2538

您好，我最近尝试将6TiSCH协议的代码移植到CC2538平台上，我使用了sleep timer用于设置定时休眠，但是我发现程序一直停在SleepModeTimerCompareSet()函数中的while(!(HWREG(SMWDTHROSC_STLOAD) & SMWDTHROSC_STLOAD_STLOAD))；处，为啥一直在等待ST0，ST3准备写入，在执行该函数之前需要提前调用别的函数名，我在该函数的用户指导文件并未看到说明。该如何进行修改，可能是因为优先级不够吗。

4 年多前

0 Susan Yang 4 年多前

TI__Guru**** 252096 points

若是可以的话，能否给出相关代码？另外您可以参考文档内SleepModeTimerCompareSet的相关说明

www.ti.com/.../swru325a.pdf

（在文档内搜索 SleepModeTimerCompareSet）

如 12.2.2.7 SleepModeTimerCompareSet

0 yh kuang 4 年多前回复 Susan Yang

Prodigy 90 points

#define TIMERLOOP_THRESHOLD 0xffffff // 511 seconds @ 32768Hz clock
#define MINIMUM_COMPAREVALE_ADVANCE 5

// ========================== variable ========================================

typedef struct {
sctimer_cbt sctimer_cb;
} sctimer_vars_t;

sctimer_vars_t sctimer_vars;

// ========================== private =========================================

void sctimer_isr_internal(void);

// ========================== protocol =========================================

/**
\brief Initialization sctimer.
*/
void sctimer_init(void){
memset(&sctimer_vars, 0, sizeof(sctimer_vars_t));
//register sleep mode timer interrupt with ISR
IntRegister(INT_SMTIM, &sctimer_isr_internal);
//Enbale sleep mode interrupt from GPIO pin interrupt
GPIOIntWakeupEnable(GPIO_IWE_SM_TIMER);
//Disable sleep mode interrupt
IntDisable(INT_SMTIM);
IntPrioritySet(INT_SMTIM,3<<5);
}

void sctimer_set_callback(sctimer_cbt cb){
sctimer_vars.sctimer_cb = cb;
}

/**
\brief set compare interrupt
*/
void sctimer_setCompare(uint32_t
){
IntEnable(INT_SMTIM);
if (SleepModeTimerCountGet() - val < TIMERLOOP_THRESHOLD){
// the timer is already late, schedule the ISR right now manually
IntPendSet(INT_SMTIM);
} else {
if (val-SleepModeTimerCountGet()<MINIMUM_COMPAREVALE_ADVANCE){
// there is hardware limitation to schedule the timer within TIMERTHRESHOLD ticks
// schedule ISR right now manually
IntPendSet(INT_SMTIM);
} else {
// schedule the timer at val
SleepModeTimerCompareSet(val);
}
}
}

/**
\brief Return the current value of the timer's counter.

\returns The current value of the timer's counter.
*/
uint32_t sctimer_readCounter(void){
return SleepModeTimerCountGet();
}

void sctimer_enable(void){
IntEnable(INT_SMTIM);
}

void sctimer_disable(void){
IntDisable(INT_SMTIM);
}

// ========================== private =========================================

void sctimer_isr_internal(void){
debugpins_isr_set();
if (sctimer_vars.sctimer_cb!=NULL) {
IntPendClear(INT_SMTIM);
sctimer_vars.sctimer_cb();
debugpins_isr_clr();
}
debugpins_isr_clr();
}

0 Susan Yang 4 年多前回复 yh kuang

TI__Guru**** 252096 points

根据您的现有程序，暂时没有发现问题。

请问您在调试时SMWDTHROSC_STLOAD与 SMWDTHROSC_STLOAD_STLOAD的值分别是多少？

#define SMWDTHROSC_STLOAD_STLOAD \
0x00000001 // Status signal for when STx
// registers have been uploaded to
// 32-kHz counter. 1: Load is
// complete 0: Load is busy and STx
// regs are blocked for writing