Function pwminit

bsp/loongson/ls1cdev/drivers/display_controller.c:52–65

static struct rt_device_graphic_info _dc_info;

static void pwminit(void)
{
    pwm_info_t pwm_info;
    pwm_info.gpio = LS1C_PWM0_GPIO06;           // pwm引脚位gpio06
    pwm_info.mode = PWM_MODE_NORMAL;            // 正常模式--连续输出pwm波形
    pwm_info.duty = 0.85;                       // pwm占空比 85%
    pwm_info.period_ns = 5*1000*1000;            // pwm周期5ms

    /*pwm初始化，初始化后立即产生pwm波形*/
    pwm_init(&pwm_info);

    /* 使能pwm */
    pwm_enable(&pwm_info);
}
int caclulate_freq(rt_uint32_t  XIN, rt_uint32_t PCLK)
{
    rt_uint32_t divider_int;