MSPM0G3507——定时器例程1——TIMA_periodic_repeat

MSPM0G3507——定时器例程1——TIMA_periodic_repeat_count

news2025/1/12 20:59:06

以下示例以周期模式配置TimerA0，并使用重复计数功能每隔2秒切换一次GPIO。注意：重复计数功能特定于TimerA0实例，而不是其他TimerA实例。这里是一次500毫秒，重复了四次

主函数：


#include "ti_msp_dl_config.h"

int main(void)
{
    SYSCFG_DL_init();

    NVIC_EnableIRQ(TIMER_0_INST_INT_IRQN);                          //允许中断
    DL_SYSCTL_enableSleepOnExit();                                  //低功耗语句可以删掉

    DL_TimerA_startCounter(TIMER_0_INST);                           //让TIMA0开始计数

    while (1) {
        __WFI();                              //低功耗语句可以删掉
    }
}

void TIMER_0_INST_IRQHandler(void)
{
    switch (DL_TimerA_getPendingInterrupt(TIMER_0_INST))        //判断是不是TIMA0中断，并确定是TIMA0中哪一个中断
     {
        case DL_TIMERA_IIDX_REPEAT_COUNT:               //如果是重复计数中断
            DL_GPIO_togglePins(GPIO_LEDS_PORT,GPIO_LEDS_USER_LED_1_PIN | GPIO_LEDS_USER_TEST_PIN);
            break;
        default:
            break;
    }
}

宏定义：


#ifndef ti_msp_dl_config_h
#define ti_msp_dl_config_h

#define CONFIG_MSPM0G350X

#if defined(__ti_version__) || defined(__TI_COMPILER_VERSION__)
#define SYSCONFIG_WEAK __attribute__((weak))
#elif defined(__IAR_SYSTEMS_ICC__)
#define SYSCONFIG_WEAK __weak
#elif defined(__GNUC__)
#define SYSCONFIG_WEAK __attribute__((weak))
#endif

#include <ti/devices/msp/msp.h>
#include <ti/driverlib/driverlib.h>
#include <ti/driverlib/m0p/dl_core.h>

#ifdef __cplusplus
extern "C" {
#endif

/*
 *  ======== SYSCFG_DL_init ========
 *  Perform all required MSP DL initialization
 *
 *  This function should be called once at a point before any use of
 *  MSP DL.
 */


/* clang-format off */

#define POWER_STARTUP_DELAY                                                (16)



#define CPUCLK_FREQ                                                     32000000



/* Defines for TIMER_0 */
#define TIMER_0_INST                                                     (TIMA0)
#define TIMER_0_INST_IRQHandler                                 TIMA0_IRQHandler
#define TIMER_0_INST_INT_IRQN                                   (TIMA0_INT_IRQn)
#define TIMER_0_INST_LOAD_VALUE                                         (16383U)
#define TIMER_0_REPEAT_COUNT_4                                               (3)




/* Port definition for Pin Group GPIO_LEDS */
#define GPIO_LEDS_PORT                                                   (GPIOA)

/* Defines for USER_LED_1: GPIOA.0 with pinCMx 1 on package pin 33 */
#define GPIO_LEDS_USER_LED_1_PIN                                 (DL_GPIO_PIN_0)
#define GPIO_LEDS_USER_LED_1_IOMUX                                (IOMUX_PINCM1)
/* Defines for USER_TEST: GPIOA.15 with pinCMx 37 on package pin 8 */
#define GPIO_LEDS_USER_TEST_PIN                                 (DL_GPIO_PIN_15)
#define GPIO_LEDS_USER_TEST_IOMUX                                (IOMUX_PINCM37)

/* clang-format on */

void SYSCFG_DL_init(void);
void SYSCFG_DL_initPower(void);
void SYSCFG_DL_GPIO_init(void);
void SYSCFG_DL_SYSCTL_init(void);
void SYSCFG_DL_TIMER_0_init(void);


bool SYSCFG_DL_saveConfiguration(void);
bool SYSCFG_DL_restoreConfiguration(void);

#ifdef __cplusplus
}
#endif

#endif /* ti_msp_dl_config_h */

主函数中有这一函数：

DL_TimerA_getPendingInterrupt(TIMER_0_INST)

是用来判断终端是否来自TIMA0中断，并确定是TIMA0中的哪个中断

这里虽然名字有TIMERA，其实还是TIMER，这里有了重定义