small_water_meter_4g_src/Drivers/Board/nb_drv.c

#include "board.h"

void nb_power_on(uint8_t baud)
{
    lpuart0_drv_init(baud); // nb uart 
    if(baud==0)
    {GpioInit(NB_EN_PIN_FUNC, GPIO_DIG_OUT_WEAK_PUSH_NONEUP_NONEDOWN);
     GpioSetPins(NB_EN_GPIO_PORT, NB_EN_GPIO_BITMASK);
		}
}

void nb_power_off(void)
{   
    PeriClk_MutDisable(PeriClk_LpUart0);
    
    GpioInit(NB_EN_PIN_FUNC, GPIO_DIG_IN_NONEUP_PULLDOWN);
    GpioInit(PD09_AF0, GPIO_DIG_IN_NONEUP_PULLDOWN);
    GpioInit(PD08_AF0, GPIO_DIG_IN_NONEUP_PULLDOWN);   
}