NK-980IOT 测评之硬件spi0驱动ili9341

发布于 2022-04-05 21:35:55 浏览：1111 订阅该版

硬件spi0驱动ili9341显示屏

#功能模块的硬件介绍

NK-980Iot spi0引脚已经引出来，实物图位置：

![实物spi0图片.png](https://oss-club.rt-thread.org/uploads/20220331/e855f30256d328afa3ef10cbbe80cf35.png.webp)

芯片手册标出spi0有两组引脚可以控制分别是PC、PD

![芯片手册显示spi0.png](https://oss-club.rt-thread.org/uploads/20220331/f0a8c03cd6c487322ee7cf158bb80e1d.png.webp)

![548d427f32f85ebd2e1b9c1a08820612.png.webp](https://oss-club.rt-thread.org/uploads/20220331/548d427f32f85ebd2e1b9c1a08820612.png.webp)

![ebi显示.png](https://oss-club.rt-thread.org/uploads/20220331/6925b00a6c8fa25a8e11a37a3ce079a5.png.webp)
我选择了PD端口的引脚，涉及到引脚 PD8、PD9、PD10、PD11
>PD8-->CS
>PD9-->CLK
>PD10-->MOSI
>PD11-->MISO

##官方手册介绍SPI0时序图
![芯片手册提供的时序图.png](https://oss-club.rt-thread.org/uploads/20220331/c2d556c6993c01766c0a926685d968f0.png.webp)

ILI9341芯片提供的时序图

![ili9341spi时序图.png](https://oss-club.rt-thread.org/uploads/20220331/86d13423ea836c18c057592f5175fe11.png.webp)

##功能模块的使用说明
###硬件环境：

![nu980.png](https://oss-club.rt-thread.org/uploads/20220313/27d5be2773fb9101eae6c0e30e2d741a.png.webp)
NU980Iot开发板
两根usb数据线
###软件环境：
RT-Thread Studio
NuWriter
Putty
#外设性能指标测试
##目标
使用硬件spi驱动lcd显示切换屏幕颜色
##创建工程
File->New->RT-Thread Project
选择Base On Board

![工程选择nu980.png](https://oss-club.rt-thread.org/uploads/20220313/43b4532316ce2d407eae130a7de09249.png.webp)

##编写代码
创建crypto.c 文档 编写代码
```
#include <rtconfig.h>
#include <rtdevice.h>
#include <drv_gpio.h>
#include <nuc980.h>
#include <nu_spi.h>
#include "gpio.h"

#define     RED          0XF800   //红色
#define     GREEN        0X07E0   //绿色
#define     BLUE         0X001F   //蓝色
#define     WHITE        0XFFFF   //白色
#define     BLACK        0X0000   //白色

#define LCD_CD      PC0
#define LCD_RESET   PC1

void LCD_CD_DATA(unsigned char val)
{

SPI_SET_SS_LOW(SPI0);
    LCD_CD=1;

SPI_WRITE_TX(SPI0, val);

while(SPI_IS_BUSY(SPI0));

SPI_SET_SS_HIGH(SPI0);
}

void LCD_CD_REG(unsigned char reg)
{

SPI_SET_SS_LOW(SPI0);
    LCD_CD=0;
  
    SPI_WRITE_TX(SPI0, reg);
  
    while(SPI_IS_BUSY(SPI0));

SPI_SET_SS_HIGH(SPI0);
}

void LCD_Init()
{
    outpw(REG_CLK_PCLKEN1, inpw(REG_CLK_PCLKEN1) | 0x20);

outpw(REG_SYS_GPD_MFPH, (inpw(REG_SYS_GPD_MFPH) & 0xFFFF0000) | 0x00001111);

SPI_Open(SPI0, SPI_MASTER, SPI_MODE_0, 8, 5000000);

SPI_DisableAutoSS(SPI0);

GPIO_SetMode(PC, BIT0, GPIO_MODE_OUTPUT);  //dc
    GPIO_SetMode(PC, BIT1, GPIO_MODE_OUTPUT);  //rest

GPIO_SetMode(PB, BIT8, GPIO_MODE_OUTPUT);

PB8=0;
    rt_thread_delay(500);
    PB8=1;
    rt_thread_delay(500);
    PB8=0;

LCD_RESET=0;
    rt_thread_delay(1);
    LCD_RESET=0;
    rt_thread_delay(10);
    LCD_RESET=1;
    rt_thread_delay(120);

LCD_CD_REG(0xCF);
    LCD_CD_DATA(0x00);
    LCD_CD_DATA(0xC1);
    LCD_CD_DATA(0X30);
    LCD_CD_REG(0xED);
    LCD_CD_DATA(0x64);
    LCD_CD_DATA(0x03);
    LCD_CD_DATA(0X12);
    LCD_CD_DATA(0X81);
    LCD_CD_REG(0xE8);
    LCD_CD_DATA(0x85);
    LCD_CD_DATA(0x10);
    LCD_CD_DATA(0x7A);
    LCD_CD_REG(0xCB);
    LCD_CD_DATA(0x39);
    LCD_CD_DATA(0x2C);
    LCD_CD_DATA(0x00);
    LCD_CD_DATA(0x34);
    LCD_CD_DATA(0x02);
    LCD_CD_REG(0xF7);
    LCD_CD_DATA(0x20);
    LCD_CD_REG(0xEA);
    LCD_CD_DATA(0x00);
    LCD_CD_DATA(0x00);
    LCD_CD_REG(0xC0);    //Power control
    LCD_CD_DATA(0x1B);   //VRH[5:0]
    LCD_CD_REG(0xC1);    //Power control
    LCD_CD_DATA(0x01);   //SAP[2:0];BT[3:0]
    LCD_CD_REG(0xC5);    //VCM control
    LCD_CD_DATA(0x30);   //3F
    LCD_CD_DATA(0x30);   //3C
    LCD_CD_REG(0xC7);    //VCM control2
    LCD_CD_DATA(0XB7);
    LCD_CD_REG(0x36);    // Memory Access Control
    LCD_CD_DATA(0x48);
    LCD_CD_REG(0x3A);
    LCD_CD_DATA(0x55);
    LCD_CD_REG(0xB1);
    LCD_CD_DATA(0x00);
    LCD_CD_DATA(0x1A);
    LCD_CD_REG(0xB6);    // Display Function Control
    LCD_CD_DATA(0x0A);
    LCD_CD_DATA(0xA2);
    LCD_CD_REG(0xF2);    // 3Gamma Function Disable
    LCD_CD_DATA(0x00);
    LCD_CD_REG(0x26);    //Gamma curve selected
    LCD_CD_DATA(0x01);
    LCD_CD_REG(0xE0);    //Set Gamma
    LCD_CD_DATA(0x0F);
    LCD_CD_DATA(0x2A);
    LCD_CD_DATA(0x28);
    LCD_CD_DATA(0x08);
    LCD_CD_DATA(0x0E);
    LCD_CD_DATA(0x08);
    LCD_CD_DATA(0x54);
    LCD_CD_DATA(0XA9);
    LCD_CD_DATA(0x43);
    LCD_CD_DATA(0x0A);
    LCD_CD_DATA(0x0F);
    LCD_CD_DATA(0x00);
    LCD_CD_DATA(0x00);
    LCD_CD_DATA(0x00);
    LCD_CD_DATA(0x00);
    LCD_CD_REG(0XE1);    //Set Gamma
    LCD_CD_DATA(0x00);
    LCD_CD_DATA(0x15);
    LCD_CD_DATA(0x17);
    LCD_CD_DATA(0x07);
    LCD_CD_DATA(0x11);
    LCD_CD_DATA(0x06);
    LCD_CD_DATA(0x2B);
    LCD_CD_DATA(0x56);
    LCD_CD_DATA(0x3C);
    LCD_CD_DATA(0x05);
    LCD_CD_DATA(0x10);
    LCD_CD_DATA(0x0F);
    LCD_CD_DATA(0x3F);
    LCD_CD_DATA(0x3F);
    LCD_CD_DATA(0x0F);
    LCD_CD_REG(0x2B);
    LCD_CD_DATA(0x00);
    LCD_CD_DATA(0x00);
    LCD_CD_DATA(0x01);
    LCD_CD_DATA(0x3f);
    LCD_CD_REG(0x2A);
    LCD_CD_DATA(0x00);
    LCD_CD_DATA(0x00);
    LCD_CD_DATA(0x00);
    LCD_CD_DATA(0xef);
    LCD_CD_REG(0x11); //Exit Sleep
    rt_thread_delay(120);
    LCD_CD_REG(0x29); //display on

}

void LCD_SetArea(unsigned int stx,unsigned int sty,unsigned int endx,unsigned int endy)
{
    LCD_CD_REG(0x2A);
    LCD_CD_DATA(stx>>8);
    LCD_CD_DATA(stx&0xff);
    LCD_CD_DATA(endx>>8);
    LCD_CD_DATA(endx&0xff);

LCD_CD_REG(0x2B);
    LCD_CD_DATA(sty>>8);
    LCD_CD_DATA(sty&0xff);
    LCD_CD_DATA(endy>>8);
    LCD_CD_DATA(endy&0xff);
}

void LcdWirteColorData(unsigned int color)
{
    SPI_SET_SS_LOW(SPI0);
    LCD_CD=1;
    SPI_WRITE_TX(SPI0, color>>8);
    while(SPI_IS_BUSY(SPI0));
    SPI_WRITE_TX(SPI0, color);
    while(SPI_IS_BUSY(SPI0));
    SPI_SET_SS_HIGH(SPI0);
}

void LCD_Clear(unsigned int color)
{
    unsigned int i,j;

LCD_SetArea(0,0,239,319);
    LCD_CD_REG(0x2C);
    for(i=0;i<320;i++)
    {
        for(j=0;j<240;j++)
        {
            LcdWirteColorData(color);
        }
    }
}

void spi_lcd_test(void)
{
    LCD_Init();
    LCD_Clear(RED);
    LCD_Clear(WHITE);
    LCD_Clear(GREEN);
    LCD_Clear(BLACK);
    LCD_Clear(BLUE);
    LCD_Clear(WHITE);
}
MSH_CMD_EXPORT(spi_lcd_test, test lcd display);
```

##编译烧写

编译代码
![faf5048ea523e893ee0f67b588c3756d.png](https://oss-club.rt-thread.org/uploads/20220313/faf5048ea523e893ee0f67b588c3756d.png)

打开终端Putty  
设置com，115200
复位nu980

![打开putty.png](https://oss-club.rt-thread.org/uploads/20220313/dcb2b15f13f1ad8b6b2210a8ece8134a.png)

烧写代码到内存

![下载.png](https://oss-club.rt-thread.org/uploads/20220313/fb6d4326f9d8c45dea6d6a465fa0508a.png.webp)

现象结果
逻辑分析仪抓到的时序图

![逻辑分析截图.png](https://oss-club.rt-thread.org/uploads/20220331/91a46f77be5c7edb137abeedc32c6646.png.webp)

![微信图片_20220331223253.jpg](https://oss-club.rt-thread.org/uploads/20220331/4a1621cfd90746236727fc2a28aacc4b.jpg.webp)

![微信图片_20220331223238.jpg](https://oss-club.rt-thread.org/uploads/20220331/b3f68e48f6e140c0c9d09059dafd7e70.jpg.webp)

#[bilibili地址](https://www.bilibili.com/video/BV1J3411H7XA/)

#可编译下载的代码gitee地址
[gitee地址](https://gitee.com/want_to_be_a_vassal/nu980-iot_crypto_qspi_ili9341lcd_test)
#心得体会
参考了stm32驱动ili9341，需要搞清楚芯片时序要求

3 条评论

FLBF_5496 2022-04-06

这家伙很懒，什么也没写！

Juggernaut 2022-04-06

①②③

@FLBF_5496

there is build error as blow:
```
../libraries/nuc980/rtt_port/drv_adc_touch.c: In function 'nu_touch_do_calibration':
../libraries/nuc980/rtt_port/drv_adc_touch.c:497:35: error: 'RTGRAPHIC_CTRL_PAN_DISPLAY' undeclared (first use in this function)
     rt_device_control(lcd_device, RTGRAPHIC_CTRL_PAN_DISPLAY, info.framebuffer);
                                   ^~~~~~~~~~~~~~~~~~~~~~~~~~
../libraries/nuc980/rtt_port/drv_adc_touch.c:497:35: note: each undeclared identifier is reported only once for each function it appears in
make: *** [libraries/nuc980/rtt_port/subdir.mk:93: libraries/nuc980/rtt_port/drv_adc_touch.o] Error 1
```

/**
 * graphic device control command
 */
#define RTGRAPHIC_CTRL_RECT_UPDATE      0
#define RTGRAPHIC_CTRL_POWERON          1
#define RTGRAPHIC_CTRL_POWEROFF         2
#define RTGRAPHIC_CTRL_GET_INFO         3
#define RTGRAPHIC_CTRL_SET_MODE         4
#define RTGRAPHIC_CTRL_GET_EXT          5
#define RTGRAPHIC_CTRL_SET_BRIGHTNESS   6
#define RTGRAPHIC_CTRL_GET_BRIGHTNESS   7
#define RTGRAPHIC_CTRL_GET_MODE         8
#define RTGRAPHIC_CTRL_GET_STATUS       9

FLBF_5496 2022-04-07

这家伙很懒，什么也没写！

Hi,

Both RTGRAPHIC_CTRL_PAN_DISPLAY and RTGRAPHIC_CTRL_WAIT_VSYNC are for sync-type LCD panel.
Please also upgrade newer kernel version.

/**
 * graphic device control command
 */
#define RTGRAPHIC_CTRL_RECT_UPDATE      (RT_DEVICE_CTRL_BASE(Graphic) + 0)
#define RTGRAPHIC_CTRL_POWERON          (RT_DEVICE_CTRL_BASE(Graphic) + 1)
#define RTGRAPHIC_CTRL_POWEROFF         (RT_DEVICE_CTRL_BASE(Graphic) + 2)
#define RTGRAPHIC_CTRL_GET_INFO         (RT_DEVICE_CTRL_BASE(Graphic) + 3)
#define RTGRAPHIC_CTRL_SET_MODE         (RT_DEVICE_CTRL_BASE(Graphic) + 4)
#define RTGRAPHIC_CTRL_GET_EXT          (RT_DEVICE_CTRL_BASE(Graphic) + 5)
#define RTGRAPHIC_CTRL_SET_BRIGHTNESS   (RT_DEVICE_CTRL_BASE(Graphic) + 6)
#define RTGRAPHIC_CTRL_GET_BRIGHTNESS   (RT_DEVICE_CTRL_BASE(Graphic) + 7)
#define RTGRAPHIC_CTRL_GET_MODE         (RT_DEVICE_CTRL_BASE(Graphic) + 8)
#define RTGRAPHIC_CTRL_GET_STATUS       (RT_DEVICE_CTRL_BASE(Graphic) + 9)
#define RTGRAPHIC_CTRL_PAN_DISPLAY      (RT_DEVICE_CTRL_BASE(Graphic) + 10)
#define RTGRAPHIC_CTRL_WAIT_VSYNC       (RT_DEVICE_CTRL_BASE(Graphic) + 11)

https://github.com/RT-Thread/rt-thread/blob/master/include/rtdef.h#L1126