b_mod_pwm

数据结构

#define PWM_HANDLER_CCR (0)
#define PWM_HANDLER_PERIOD (1)
//PWM回调函数，type： PWM_HANDLER_CCR or PWM_HANDLER_PERIOD
typedef void (*pPwmHandler)(uint8_t type);

typedef struct bSoftPwmStruct
{
    uint32_t               repeat;   //指定重复次数，为0则一直重复
    uint32_t               tick;     //用于计时
    uint32_t               period;   //周期，单位ms
    uint32_t               ccr;      //CCR，单位ms
    pPwmHandler            handler;  //回调执行函数
    uint32_t               flag;     //执行回调标志
    struct bSoftPwmStruct *next;
} bSoftPwmStruct_t;

typedef bSoftPwmStruct_t bSoftPwmInstance_t;

// 创建PWM实例，指定PWM的参数
#define bPWM_INSTANCE(name, _period, _ccr, _repeat) \
    bSoftPwmInstance_t name = {.period = _period, .ccr = _ccr, .repeat = _repeat};

接口介绍

//启动PWM，并指定回调
int bSoftPwmStart(bSoftPwmInstance_t *pPwmInstance, pPwmHandler handler);
int bSoftPwmStop(bSoftPwmInstance_t *pPwmInstance);
int bSoftPwmReset(bSoftPwmInstance_t *pPwmInstance);
int bSoftPwmSetPeriod(bSoftPwmInstance_t *pPwmInstance, uint32_t ms);
int bSoftPwmSetCcr(bSoftPwmInstance_t *pPwmInstance, uint32_t ms);

使用例子

bPWM_INSTANCE(led1_pwm, 20, 5, 0);
bPWM_INSTANCE(led2_pwm, 20, 18, 0);

void PwmHandler1(uint8_t type)
{
    if(type == PWM_HANDLER_CCR)
    {
        bHalGpioWritePin(B_HAL_GPIOD, B_HAL_PIN7, 0);
    }
    else
    {
        bHalGpioWritePin(B_HAL_GPIOD, B_HAL_PIN7, 1);
    }
}

void PwmHandler2(uint8_t type)
{
    if(type == PWM_HANDLER_CCR)
    {
        bHalGpioWritePin(B_HAL_GPIOD, B_HAL_PIN3, 0);
    }
    else
    {
        bHalGpioWritePin(B_HAL_GPIOD, B_HAL_PIN3, 1);
    }
}

int main()
{
    ...
    bInit();
    bSoftPwmStart(&led1_pwm, PwmHandler1);
    bSoftPwmStart(&led2_pwm, PwmHandler2);
    ...
}