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)(temp100)%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。