SPMOD - LCD 1.14

概述

SPMOD_LCD1.14(1.14寸 LCD 屏幕模块)采用 ST7735S TFT LCD屏。

SPMOD - LCD1.14 介绍

• 采用 Sipeed-SPMOD 接口(2.54mm * 8PIN 排针)，统一 MaixPy 开发板接口
• 采用常见 LCD 驱动 IC ST7735S(4 线 SPI 通讯)
• 分辨率：240*135
• 模块尺寸：35.0*20.0mm

ST7735S TFT LCD屏 介绍

内部集成电路包含DC / DC转换器、可调VCOM生成器、非易失性（NV）存储器（用于存储初始寄存器设置）、显示时钟的振荡器以及时序控制器

SPMOD_LCD1.14 模块引脚定义：

• 接线方式:

使用例程

• 流程

  1. 初始化配置
  2. 创建 Image 并填充
  3. 发送图像并刷新

C 示例：

  fpioa_set_function(SPI_IPS_LCD_CS_PIN_NUM, FUNC_SPI1_SS0);   // SPI_IPS_LCD_CS_PIN_NUM: 20;
  fpioa_set_function(SPI_IPS_LCD_SCK_PIN_NUM, FUNC_SPI1_SCLK); // SPI_IPS_LCD_SCK_PIN_NUM: 21;
  fpioa_set_function(SPI_IPS_LCD_MOSI_PIN_NUM, FUNC_SPI1_D0);  // SPI_IPS_LCD_MOSI_PIN_NUM: 8;
  fpioa_set_function(SPI_IPS_LCD_DC_PIN_NUM, FUNC_GPIOHS0 + SPI_IPS_LCD_DC_GPIO_NUM);   // SPI_IPS_LCD_DC_PIN_NUM: 15; SPI_IPS_LCD_DC_GPIO_NUM: 15;
  fpioa_set_function(SPI_IPS_LCD_RST_PIN_NUM, FUNC_GPIOHS0 + SPI_IPS_LCD_RST_GPIO_NUM); // SPI_IPS_LCD_RST_PIN_NUM: 7; SPI_IPS_LCD_RST_GPIO_NUM: 7;
  fpioa_set_function(SPI_IPS_LCD_BL_PIN_NUM, FUNC_GPIOHS0 + SPI_IPS_LCD_BL_GPIO_NUM);   // SPI_IPS_LCD_BL_PIN_NUM: 6; SPI_IPS_LCD_BL_GPIO_NUM: 6;

  // set gpiohs work mode to output mode
  gpiohs_set_drive_mode(SPI_IPS_LCD_DC_GPIO_NUM, GPIO_DM_OUTPUT);
  gpiohs_set_drive_mode(SPI_IPS_LCD_RST_GPIO_NUM, GPIO_DM_OUTPUT);
  gpiohs_set_drive_mode(SPI_IPS_LCD_BL_GPIO_NUM, GPIO_DM_OUTPUT);

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

  ips_lcd_init(); // init
  LCD_ShowPicture(0, 0, LCD_W, LCD_H, gImage_nanke); // display

MaixPy 例程：

  # 20: SPI_LCD_CS_PIN_NUM;
  fm.register(SPI_LCD_CS_PIN_NUM, fm.fpioa.GPIOHS20, force=True)
  # 15: SPI_LCD_DC_PIN_NUM;
  fm.register(SPI_LCD_DC_PIN_NUM, fm.fpioa.GPIOHS15, force=True)
  # 6: SPI_LCD_BUSY_PIN_NUM;
  fm.register(SPI_LCD_BUSY_PIN_NUM, fm.fpioa.GPIOHS6, force=True)
  # 7: SPI_LCD_RST_PIN_NUM;
  fm.register(SPI_LCD_RST_PIN_NUM, fm.fpioa.GPIOHS7, force=True)

  # set gpiohs work mode to output mode
  cs = GPIO(GPIO.GPIOHS20, GPIO.OUT)
  dc = GPIO(GPIO.GPIOHS15, GPIO.OUT)
  busy = GPIO(GPIO.GPIOHS6, GPIO.OUT)
  rst = GPIO(GPIO.GPIOHS7, GPIO.OUT)

  # 21: SPI_LCD_SCK_PIN_NUM; 8: SPI_LCD_MOSI_PIN_NUM;
  spi1 = SPI(SPI_LCD_NUM, mode=SPI.MODE_MASTER, baudrate=SPI_LCD_FREQ_KHZ * 1000,
              polarity=0, phase=0, bits=8, firstbit=SPI.MSB, sck=SPI_LCD_SCK_PIN_NUM, mosi=SPI_LCD_MOSI_PIN_NUM)

  ips = SPLCD114(spi1, cs, dc, rst, busy, IPS_WIDTH, IPS_HEIGHT, IPS_MODE)

  # create an 'image' and fill it
  img = image.Image()
  img.draw_rectangle(80, 80, 30, 30)

  # display
  ips.display(img)

运行环境

MaixPy固件建议自行从最新源码编译

运行结果

• C

  

• MaixPy

  

移植

修改以下参数即可适配其他 K210 开发板.

• 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_IPS_LCD_CS_PIN_NUM      20
  #define SPI_IPS_LCD_SCK_PIN_NUM     21
  #define SPI_IPS_LCD_MOSI_PIN_NUM    8

  #define SPI_IPS_LCD_DC_PIN_NUM     15
  #define SPI_IPS_LCD_BL_PIN_NUM      6
  #define SPI_IPS_LCD_RST_PIN_NUM     7

  #define SPI_IPS_LCD_DC_GPIO_NUM     15
  #define SPI_IPS_LCD_BL_GPIO_NUM     6
  #define SPI_IPS_LCD_RST_GPIO_NUM    7

  #define USE_HORIZONTAL 3    // 0/1 is horizontal, and 2/3 is vertical.

• Maixpy

  ################### config ###################
  SPI_LCD_NUM = SPI.SPI1
  SPI_LCD_DC_PIN_NUM = const(15)
  SPI_LCD_BUSY_PIN_NUM = const(6)
  SPI_LCD_RST_PIN_NUM = const(7)
  SPI_LCD_CS_PIN_NUM = const(20)
  SPI_LCD_SCK_PIN_NUM = const(21)
  SPI_LCD_MOSI_PIN_NUM = const(8)
  SPI_LCD_FREQ_KHZ = const(600)
  ##############################################

参考设计

• SPMOD_LCD1.14 尺寸图：

资源链接