SPMOD - Eink

Overview

SPMOD_Eink(E-paper display module) uses GDEW0154M09 E-paper display.

SPMOD - Eink Introduction

• Using Sipeed-SPMOD interface(2.54mm * 8PIN )，unified MaixPy board interface
• Connect to the screen through the SP-MOD SPI interface
• E-paper display module：GDEW0154M09 is a 1.54" E-paper display，with SPI interface，and has 24P FPC(0.5mm pitch).
• Support 1 bit Black/Write full display capabilities
• Display Resolution：200x200
• Size：35303.8mm

GDEW0154M09 E-paper display Introduction

An integrated circuit contains gate buffer, source buffer, interface, timing control logic, oscillator,

DC-DC, SRAM, LUT, VCOM, and border are supplied with each panel.

SPMOD_Eink pin description ：

• Mode of connection:：

AT instruction list

See GDEW0154M09.pdf for more information

Usage

• Process

  1.initializatin
  2.create an image and fill it
  3.send image and refresh

C：

spi_init(1, SPI_WORK_MODE_0, SPI_FF_STANDARD, DATALENGTH, 0);

fpioa_set_function(SPI_Eink_CS_PIN_NUM, FUNC_SPI1_SS0);   // SPI_Eink_CS_PIN_NUM: 20;
fpioa_set_function(SPI_Eink_SCK_PIN_NUM, FUNC_SPI1_SCLK); // SPI_Eink_SCK_PIN_NUM: 21;
fpioa_set_function(SPI_Eink_MOSI_PIN_NUM, FUNC_SPI1_D0);  // SPI_Eink_MOSI_PIN_NUM: 8;

fpioa_set_function(SPI_Eink_DC_PIN_NUM, FUNC_GPIOHS0 + SPI_Eink_DC_GPIO_NUM);   // SPI_Eink_DC_PIN_NUM: 21;
fpioa_set_function(SPI_Eink_RST_PIN_NUM, FUNC_GPIOHS0 + SPI_Eink_RST_GPIO_NUM); // SPI_Eink_RST_PIN_NUM: 7;
fpioa_set_function(SPI_Eink_BL_PIN_NUM, FUNC_GPIOHS0 + SPI_Eink_BL_GPIO_NUM);   // SPI_Eink_BL_PIN_NUM: 6;

gpiohs_set_drive_mode(SPI_Eink_DC_GPIO_NUM, GPIO_DM_OUTPUT);
gpiohs_set_drive_mode(SPI_Eink_RST_GPIO_NUM, GPIO_DM_OUTPUT);

gpiohs_set_pin(SPI_Eink_DC_GPIO_NUM, GPIO_PV_HIGH);
gpiohs_set_pin(SPI_Eink_RST_GPIO_NUM, GPIO_PV_HIGH);

gpiohs_set_drive_mode(SPI_Eink_BL_PIN_NUM, GPIO_DM_INPUT_PULL_UP);
gpiohs_set_pin_edge(SPI_Eink_BL_PIN_NUM, GPIO_PE_BOTH);

  EPD_DisplayInit(); //EPD init

//Paint initialization
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

Paint_Clear(WHITE); //clear paint
Paint_DrawString_EN(0, 0, "sipeed", &Font8, WHITE, BLACK);   //5*8
Paint_DrawString_EN(0, 10, "sipeed", &Font12, WHITE, BLACK); //7*12
Paint_DrawString_EN(0, 25, "sipeed", &Font16, WHITE, BLACK); //11*16
Paint_DrawString_EN(0, 45, "sipeed", &Font20, WHITE, BLACK); //14*20
Paint_DrawString_EN(0, 80, "sipeed", &Font24, WHITE, BLACK); //17*24
EPD_FullDisplay(BlackImage, BlackImage, 0);                  //display image

MaixPy：

spi1 = SPI(SPI.SPI1, mode=SPI.MODE_MASTER, baudrate=600 * 1000,
            polarity=0, phase=0, bits=8, firstbit=SPI.MSB, sck=21, mosi=8)

fm.register(20, fm.fpioa.GPIOHS20, force=True) # SPI_Eink_SS_PIN_NUM: 20;
fm.register(15, fm.fpioa.GPIOHS15, force=True) # SPI_Eink_DC_PIN_NUM: 15;
fm.register(6, fm.fpioa.GPIOHS6, force=True) # SPI_Eink_BUSY_PIN_NUM: 6;
fm.register(7, fm.fpioa.GPIOHS7, force=True) # SPI_Eink_RST_PIN_NUM: 7;

cs = GPIO(GPIO.GPIOHS20, GPIO.OUT)
dc = GPIO(GPIO.GPIOHS15, GPIO.OUT)
busy = GPIO(GPIO.GPIOHS6, GPIO.IN, GPIO.PULL_DOWN)
rst = GPIO(GPIO.GPIOHS7, GPIO.OUT)

epd = SPEink(spi1, cs, dc, rst, busy, SPEink_WIDTH, SPEink_HEIGHT, SPEink_ROTATION)
epd.init()

img = image.Image()
img = img.resize(200, 200)
img.draw_line(0, 0, 100, 100)

epd.display(img)

Runtime environments:

The MaixPy firmware is recommended to compile from the latest source

Result

• C

  

• MaixPy

  

Transplant

The following parameters need to be modified

• C

    // board_config.h
    #define SPI_INDEX 1
    #define SPI_SCLK_RATE 600 * 1000
    #define SPI_CHIP_SELECT_NSS 0 //SPI_CHIP_SELECT_0
  
    #define SPI_Eink_CS_PIN_NUM 20
    #define SPI_Eink_SCK_PIN_NUM 21
    #define SPI_Eink_MOSI_PIN_NUM 8
  
    #define SPI_Eink_DC_PIN_NUM 15
    #define SPI_Eink_BL_PIN_NUM 6
    #define SPI_Eink_RST_PIN_NUM 7
  
    #define SPI_Eink_DC_GPIO_NUM 15
    #define SPI_Eink_BL_GPIO_NUM 6
    #define SPI_Eink_RST_GPIO_NUM 7
  

• MaixPy

  ################### config ###################
    SPI_Eink_NUM = SPI.SPI1
    SPI_Eink_DC_PIN_NUM = const(15)
    SPI_Eink_BUSY_PIN_NUM = const(6)
    SPI_Eink_RST_PIN_NUM = const(7)
    SPI_Eink_CS_PIN_NUM = const(20)
    SPI_Eink_SCK_PIN_NUM = const(21)
    SPI_Eink_MOSI_PIN_NUM = const(8)
    SPI_Eink_FREQ_KHZ = const(600)
  ##############################################
  
  

Outlook

• SPMOD_Eink Size drawing:

Resource Link