在這篇文章中我們展示如何采集溫濕度計，今天向大家介紹采集溫度后顯示于墨水屏。并實現深度休眠模式，同時展示工作、休眠的電流檢測。

1、增加墨水屏顯示：

創建epaper文件夾并加入下圖所示的spi驅動、墨水屏顯示、繪畫、字庫等：

2、main.c的實現：

#include

#include

#include "sensor_renesas_hs300x.h"

#include "drv_gpio.h"

#include

#include "Display_EPD_w21.h"

#include "Display_EPD_W21_spi.h"

#include "fonts.h"

#include "GUI_Paint.h"

#define LED_PIN GET_PIN(0, 0)

#define USE_SECONDS_FOR_ALARM 10

#define LONG_GLITCH_DELAY_MS 100u /* in ms */

#define RTC_INTERRUPT_PRIORITY 3u

void set_rtc_alarm_date_time(void);

cyhal_rtc_t rtc_obj;

unsigned char BlackImage[4736];//Define canvas space

extern struct hs300x_device temp_humi_dev;

int main(void)

{

cy_rslt_t result;

float temp, humi;

uint8_t show_str[20] = {0};

EPD_GPIO_Init(); //EPD GPIO initialization

__enable_irq();

rt_pin_mode(LED_PIN, PIN_MODE_OUTPUT);

Paint_NewImage(BlackImage, 128, 296, 270, WHITE); //Set screen size and display orientation

Paint_SelectImage(BlackImage);//Set the virtual canvas data storage location

Paint_NewImage(BlackImage, EPD_WIDTH, EPD_HEIGHT, 270, WHITE); //Set screen size and display orientation

Paint_SelectImage(BlackImage);//Set the virtual canvas data storage location

EPD_DeepSleep();

/* Initialize RTC */

cyhal_rtc_enable_event(&rtc_obj, CYHAL_RTC_ALARM, RTC_INTERRUPT_PRIORITY, true);

set_rtc_alarm_date_time();

for (;;)

{

/* Go to deep sleep */

cyhal_syspm_deepsleep();

set_rtc_alarm_date_time();

hs300x_read_data(&temp_humi_dev, &humi, &temp);

EPD_HW_Init(); //Electronic paper initialization

EPD_HW_Init_GUI(); //EPD init GUI

Paint_Clear(WHITE);

sprintf(show_str,"溫度%02d.%02d℃",(int)temp, (int)(temp*100)%100);

Paint_DrawString_CN(40,0,show_str, &Font24CN, WHITE, BLACK);

sprintf(show_str,"濕度%02d.%02d%%",(int)humi, (int)(humi*100)%100);

Paint_DrawString_CN(40,40,show_str, &Font24CN, WHITE, BLACK);

EPD_Display(BlackImage); //display image

EPD_DeepSleep();//EPD_DeepSleep,Sleep instruction is necessary, please do not delete!!!

}

}

實現的效果：

上傳開發板以后工作電流為19MA，休眠電流為450uA左右。