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补充:oled显示

接线要求

按照如下要求连接oled屏幕

img

GND接开发板GND
VCC接开发板3.3v
SCL接开发板GPIO 06
SDA接开发板GPIO 08
RES接开发板GPIO 05
DC接开发板GPIO 07
BLK接开发板GPIO 3.3v

项目编写

  1. 在 applications/genkipi/app 下新建 oled 文件夹
  2. 在oled 下新建 main.c 文件
  3. 在oled 下新建 BUILD.gn文件

代码部分

拷贝资料中的lcd.h、lcd.c、oledfont.h、Weather.h文件到oled文件夹中

main.c 文件内容

#include <stdio.h>
#include <string.h>
#include <unistd.h>

#include "ohos_init.h"
#include "cmsis_os2.h"

#include "hi_io.h"
#include "iot_gpio.h"
#include "iot_io.h"
#include "genki_pin.h"
#include "iot_spi.h"
#include "lcd.h"
#include "Weather.h"

static void init_spi(){
    //5:RES 6:SCL(时钟) 7:DC(片选) 8:SDA(数据)
    /*------------------ 初始化引脚 ------------------*/
    //时钟和数据线
    IoTIoSetFunc(IOT_IO_NAME_6, IOT_IO_FUNC_6_SPI0_CK);

    IoTIoSetFunc(IOT_IO_NAME_8, IOT_IO_FUNC_8_SPI0_TXD);
    IoTIoSetDriverStrength(IOT_IO_NAME_6, IOT_IO_DRIVER_STRENGTH_2);


    //RES
    IoTIoSetFunc(IOT_IO_NAME_5, IOT_IO_FUNC_5_GPIO);
    IoTGpioSetDir(IOT_IO_NAME_5, IOT_GPIO_DIR_OUT);


    //DC
    IoTIoSetFunc(IOT_IO_NAME_7, IOT_IO_FUNC_7_GPIO);
    IoTGpioSetDir(IOT_IO_NAME_7, IOT_GPIO_DIR_OUT);


    /*------------------ spi配置 ------------------*/
    IoTSpiCfgBasicInfo spi_cfg_basic_info;
    spi_cfg_basic_info.cpha = IOT_SPI_CFG_CLOCK_CPHA_1;
    spi_cfg_basic_info.cpol = IOT_SPI_CFG_CLOCK_CPOL_1;
    spi_cfg_basic_info.dataWidth = IOT_SPI_CFG_DATA_WIDTH_E_8BIT;
    spi_cfg_basic_info.endian = 0;
    spi_cfg_basic_info.framMode = IOT_SPI_CFG_FRAM_MODE_MOTOROLA;
    spi_cfg_basic_info.freq = 40000000; /* set frequency 2000000 */

    IoTSpiCfgInitParam spi_init_param = {0};
    spi_init_param.isSlave = HI_FALSE;
    uint32_t ret = IoTSpiInit(IOT_SPI_ID_0, spi_init_param, &spi_cfg_basic_info);
    if (ret != HI_ERR_SUCCESS) {
        printf("init fail!\n");
    }
}


void show_rain(void){
    int i = 0;
    while(1)
    {
        LCD_ShowGif(64-50,0,64+63-50,63,weather_rain[i%3],0x1000);
        usleep(500*1000);
        i++;
    }
}

static void Lcd_show(){
    //清屏
    LCD_Clear(BLACK);

    LCD_ShowChar96(0+48*0,0,'0',0,WHITE);
    LCD_ShowChar96(0+48*1,0,'5',0,WHITE);
    LCD_ShowChar96(0+48*2,0,':',0,WHITE);
    LCD_ShowChar96(0+48*3,0,'2',0,WHITE);
    LCD_ShowChar96(0+48*4,0,'8',0,WHITE);

    LCD_ShowChar42(63+35+24*0,101,'2',0,WHITE);
    LCD_ShowChar42(63+35+24*1,101,'0',0,WHITE);
    LCD_ShowChar42(63+35+24*2,101,'2',0,WHITE);
    LCD_ShowChar42(63+35+24*3,101,'1',0,WHITE);

    LCD_ShowChar42(63+35+24*0,101+43,'0',0,WHITE);
    LCD_ShowChar42(63+35+24*1,101+43,'9',0,WHITE);
    LCD_ShowChar42(63+35+24*2,101+43,'/',0,WHITE);
    LCD_ShowChar42(63+35+24*3,101+43,'0',0,WHITE);
    LCD_ShowChar42(63+35+24*4,101+43,'8',0,WHITE);

    LCD_ShowChinese2(63+35+48*0,101+43+42,0,42,YELLOW);
    LCD_ShowChinese2(63+35+48*1,101+43+42,2,42,YELLOW);

    LCD_DrawLine(0,100,239,100,WHITE);

    //显示下雨天动图
    show_rain();
}

static void oled_task(void *arg) {
    //初始化spi
    init_spi();
    //初始化oled板
    Lcd_Init();
    //显示
    Lcd_show();
}


static void start(void) {
    osThreadAttr_t attr;

    attr.name = "thread_1";
    attr.attr_bits = 0U;
    attr.cb_mem = NULL;
    attr.cb_size = 0U;
    attr.stack_mem = NULL;
    attr.stack_size = 1024 * 4;
    attr.priority = 25;

    if (osThreadNew(oled_task, NULL, &attr) == NULL) {
        printf("Falied to create oled_task!\r\n");
    }

}

APP_FEATURE_INIT(start);

项目Build.gn

tcp_server 目录下 BUILD.gn 内容为

static_library("oled") {
    sources = [
        "main.c",
        "lcd.c"
    ]

    include_dirs = [
        "//utils/native/lite/include",
        "//base/iot_hardware/peripheral/interfaces/kits",
        "//device/itcast/genkipi/interfaces/kits",
        "//foundation/communication/wifi_lite/interfaces/wifiservice"
    ]
}

外部Build.gn

oled_pic文件夹上一级目录下BUILD.gn内容为

import("//build/lite/config/component/lite_component.gni")

lite_component("app") {
    features = [
        "oled"
    ]
}