【Avnet | NXP FRDM-MCXN947试用活动】驱动TFT彩屏

yinwuqing

本帖最后由 yinwuqing 于 2024-12-4 00:22 编辑

一、简介
本次采用SPI方式驱动ST7735S TFT-LCD屏。ST7735S是用于262K彩色图形型TFT-LCD的单芯片控制器/驱动器。由396条组成源极线和162个栅极线驱动电路。该芯片能够直接连接到外部微处理器，并接受串行外围接口（SPI）、8位/9位/16位/18位并行接口。显示数据可以存储在132 x 162 x 18位的片上显示数据RAM中。它可以执行显示数据RAM读/写操作，无需外部操作时钟，可最大限度地降低功耗。此外，由于驱动液晶所需的集成电源电路具有较少组件的显示系统。

二、硬件连线
该屏为1.8寸，宽高：128 x 160，本人采用的是基于硬禾学堂提供的外设底板，该部分电路原理图如下：

由上电路原理图可知，该外设底板集成的LCD屏是具备触摸功能的，此次就单单显示部分功能进行驱动。
再来看FRDM-MCXN947开发板的原理图部分，两者信号脚确认好后，才能使用杜邦线进行正确连接。

两块板子信号脚的连接布设如下：

ST7735STFT-LCD屏	FRDM-MCXN947开发板
VCC	P3V3
GND	GND
SCLK	P4_1(SCL)
MOSI	P4_0(SDA)
DC(Data/Command)	P0_7
CS(Chip Select)	P0_12
BLK(Backlight)	P4_5
RES	P4_7

硬件连接图：

三、代码实现
本次工程还是在上期点灯例程上进行完善吧，首先在pin_mux.c文件中加入io的初始化代码。

void BOARD_InitPins(void)
{
/* Enables the clock for PORT0 controller: Enables clock */
CLOCK_EnableClock(kCLOCK_Port0);
/* Enables the clock for PORT1 controller: Enables clock */
CLOCK_EnableClock(kCLOCK_Port1);
CLOCK_EnableClock(kCLOCK_Port4);
gpio_pin_config_t LCD_GPIO_config0 = {
.pinDirection = kGPIO_DigitalOutput,
.outputLogic = 0U,
};
gpio_pin_config_t LCD_GPIO_config1 = {
.pinDirection = kGPIO_DigitalOutput,
.outputLogic = 1U,
};
GPIO_PinInit(GPIO0, 7U, &LCD_GPIO_config0);
GPIO_PinInit(GPIO0, 12U, &LCD_GPIO_config0);
GPIO_PinInit(GPIO4, 0U, &LCD_GPIO_config0);
GPIO_PinInit(GPIO4, 1U, &LCD_GPIO_config0);
GPIO_PinInit(GPIO4, 5U, &LCD_GPIO_config0);
GPIO_PinInit(GPIO4, 7U, &LCD_GPIO_config0);
PORT_SetPinMux(PORT0, 7U, kPORT_MuxAlt0);
PORT_SetPinMux(PORT0, 12U,kPORT_MuxAlt0);
PORT_SetPinMux(PORT4, 0U, kPORT_MuxAlt0);
PORT_SetPinMux(PORT4, 1U, kPORT_MuxAlt0);
PORT_SetPinMux(PORT4, 5U, kPORT_MuxAlt0);
PORT_SetPinMux(PORT4, 7U, kPORT_MuxAlt0);
const port_pin_config_t port0_7_config= {/* Internal pull-up/down resistor is disabled */
kPORT_PullDisable,
/* Low internal pull resistor value is selected. */
kPORT_LowPullResistor,
/* Fast slew rate is configured */
kPORT_FastSlewRate,
/* Passive input filter is disabled */
kPORT_PassiveFilterDisable,
/* Open drain output is disabled */
kPORT_OpenDrainDisable,
/* Low drive strength is configured */
kPORT_LowDriveStrength,
/* Pin is configured as PIO0_10 */
kPORT_MuxAlt0,
/* Digital input enabled */
kPORT_InputBufferEnable,
/* Digital input is not inverted */
kPORT_InputNormal,
/* Pin Control Register fields [15:0] are not locked */
kPORT_UnlockRegister};
const port_pin_config_t port0_10_pinB12_config = {/* Internal pull-up/down resistor is disabled */
kPORT_PullDisable,
/* Low internal pull resistor value is selected. */
kPORT_LowPullResistor,
/* Fast slew rate is configured */
kPORT_FastSlewRate,
/* Passive input filter is disabled */
kPORT_PassiveFilterDisable,
/* Open drain output is disabled */
kPORT_OpenDrainDisable,
/* Low drive strength is configured */
kPORT_LowDriveStrength,
/* Pin is configured as PIO0_10 */
kPORT_MuxAlt0,
/* Digital input enabled */
kPORT_InputBufferEnable,
/* Digital input is not inverted */
kPORT_InputNormal,
/* Pin Control Register fields [15:0] are not locked */
kPORT_UnlockRegister};
/* PORT0_10 (pin B12) is configured as PIO0_10 */
PORT_SetPinConfig(PORT0, 10U, &port0_10_pinB12_config);
const port_pin_config_t port0_27_pinE10_config = {/* Internal pull-up/down resistor is disabled */
kPORT_PullDisable,
/* Low internal pull resistor value is selected. */
kPORT_LowPullResistor,
/* Fast slew rate is configured */
kPORT_FastSlewRate,
/* Passive input filter is disabled */
kPORT_PassiveFilterDisable,
/* Open drain output is disabled */
kPORT_OpenDrainDisable,
/* Low drive strength is configured */
kPORT_LowDriveStrength,
/* Pin is configured as PIO0_27 */
kPORT_MuxAlt0,
/* Digital input enabled */
kPORT_InputBufferEnable,
/* Digital input is not inverted */
kPORT_InputNormal,
/* Pin Control Register fields [15:0] are not locked */
kPORT_UnlockRegister};
/* PORT0_27 (pin E10) is configured as PIO0_27 */
PORT_SetPinConfig(PORT0, 27U, &port0_27_pinE10_config);
const port_pin_config_t port1_2_pinC04_config = {/* Internal pull-up/down resistor is disabled */
kPORT_PullDisable,
/* Low internal pull resistor value is selected. */
kPORT_LowPullResistor,
/* Fast slew rate is configured */
kPORT_FastSlewRate,
/* Passive input filter is disabled */
kPORT_PassiveFilterDisable,
/* Open drain output is disabled */
kPORT_OpenDrainDisable,
/* Low drive strength is configured */
kPORT_LowDriveStrength,
/* Pin is configured as PIO1_2 */
kPORT_MuxAlt0,
/* Digital input enabled */
kPORT_InputBufferEnable,
/* Digital input is not inverted */
kPORT_InputNormal,
/* Pin Control Register fields [15:0] are not locked */
kPORT_UnlockRegister};
/* PORT1_2 (pin C04) is configured as PIO1_2 */
PORT_SetPinConfig(PORT1, 2U, &port1_2_pinC04_config);
const port_pin_config_t port0_2_pinB16_config = {/* Internal pull-up/down resistor is disabled */
kPORT_PullDisable,
/* Low internal pull resistor value is selected. */
kPORT_LowPullResistor,
/* Fast slew rate is configured */
kPORT_FastSlewRate,
/* Passive input filter is disabled */
kPORT_PassiveFilterDisable,
/* Open drain output is disabled */
kPORT_OpenDrainDisable,
/* High drive strength is configured */
kPORT_HighDriveStrength,
/* Pin is configured as SWO */
kPORT_MuxAlt1,
/* Digital input enabled */
kPORT_InputBufferEnable,
/* Digital input is not inverted */
kPORT_InputNormal,
/* Pin Control Register fields [15:0] are not locked */
kPORT_UnlockRegister};
/* PORT0_2 (pin B16) is configured as SWO */
PORT_SetPinConfig(PORT0, 2U, &port0_2_pinB16_config);
PORT_SetPinConfig(PORT0, 7U, &port0_7_config);
PORT_SetPinConfig(PORT0, 12U,&port0_7_config);
PORT_SetPinConfig(PORT4, 0U, &port0_7_config);
PORT_SetPinConfig(PORT4, 1U, &port0_7_config);
PORT_SetPinConfig(PORT4, 5U, &port0_7_config);
PORT_SetPinConfig(PORT4, 7U, &port0_7_config);
}

复制代码

lcd_init.c

#include "lcd_init.h"
#include "board.h"
#include "peripherals.h"
/******************************************************************************
函数说明：LCD串行数据写入函数
入口数据：dat 要写入的串行数据
返回值：无
******************************************************************************/
void LCD_Writ_Bus(u8 dat)
{
u8 i;
LCD_CS_Clr();
for(i=0;i<8;i++)
{
LCD_SCLK_Clr();
if(dat&0x80)
{
LCD_MOSI_Set();
}
else
{
LCD_MOSI_Clr();
}
LCD_SCLK_Set();
dat<<=1;
}
LCD_CS_Set();
}
/******************************************************************************
函数说明：LCD写入数据
入口数据：dat 写入的数据
返回值：无
******************************************************************************/
void LCD_WR_DATA8(u8 dat)
{
LCD_Writ_Bus(dat);
}
/******************************************************************************
函数说明：LCD写入数据
入口数据：dat 写入的数据
返回值：无
******************************************************************************/
void LCD_WR_DATA(u16 dat)
{
LCD_Writ_Bus(dat>>8);
LCD_Writ_Bus(dat);
}
/******************************************************************************
函数说明：LCD写入命令
入口数据：dat 写入的命令
返回值：无
******************************************************************************/
void LCD_WR_REG(u8 dat)
{
LCD_DC_Clr();//写命令
LCD_Writ_Bus(dat);
LCD_DC_Set();//写数据
}
/******************************************************************************
函数说明：设置起始和结束地址
入口数据：x1,x2 设置列的起始和结束地址
y1,y2 设置行的起始和结束地址
返回值：无
******************************************************************************/
void LCD_Address_Set(u16 x1,u16 y1,u16 x2,u16 y2)
{
if(USE_HORIZONTAL==0)
{
LCD_WR_REG(0x2a);//列地址设置
LCD_WR_DATA(x1+2);
LCD_WR_DATA(x2+2);
LCD_WR_REG(0x2b);//行地址设置
LCD_WR_DATA(y1+1);
LCD_WR_DATA(y2+1);
LCD_WR_REG(0x2c);//储存器写
}
else if(USE_HORIZONTAL==1)
{
LCD_WR_REG(0x2a);//列地址设置
LCD_WR_DATA(x1+2);
LCD_WR_DATA(x2+2);
LCD_WR_REG(0x2b);//行地址设置
LCD_WR_DATA(y1+1);
LCD_WR_DATA(y2+1);
LCD_WR_REG(0x2c);//储存器写
}
else if(USE_HORIZONTAL==2)
{
LCD_WR_REG(0x2a);//列地址设置
LCD_WR_DATA(x1+1);
LCD_WR_DATA(x2+1);
LCD_WR_REG(0x2b);//行地址设置
LCD_WR_DATA(y1+2);
LCD_WR_DATA(y2+2);
LCD_WR_REG(0x2c);//储存器写
}
else
{
LCD_WR_REG(0x2a);//列地址设置
LCD_WR_DATA(x1+1);
LCD_WR_DATA(x2+1);
LCD_WR_REG(0x2b);//行地址设置
LCD_WR_DATA(y1+2);
LCD_WR_DATA(y2+2);
LCD_WR_REG(0x2c);//储存器写
}
}
void LCD_Init(void)
{
LCD_RES_Clr();//复位
SysTick_DelayTicks(1000);
LCD_RES_Set();
SysTick_DelayTicks(1000);
LCD_BLK_Set();//打开背光
SysTick_DelayTicks(120000);
//************* Start Initial Sequence **********//
LCD_WR_REG(0x11); //Sleep out
SysTick_DelayTicks(120000); //Delay 120ms
//------------------------------------ST7735S Frame Rate-----------------------------------------//
LCD_WR_REG(0xB1);
LCD_WR_DATA8(0x05);
LCD_WR_DATA8(0x3C);
LCD_WR_DATA8(0x3C);
LCD_WR_REG(0xB2);
LCD_WR_DATA8(0x05);
LCD_WR_DATA8(0x3C);
LCD_WR_DATA8(0x3C);
LCD_WR_REG(0xB3);
LCD_WR_DATA8(0x05);
LCD_WR_DATA8(0x3C);
LCD_WR_DATA8(0x3C);
LCD_WR_DATA8(0x05);
LCD_WR_DATA8(0x3C);
LCD_WR_DATA8(0x3C);
//------------------------------------End ST7735S Frame Rate---------------------------------//
LCD_WR_REG(0xB4); //Dot inversion
LCD_WR_DATA8(0x03);
//------------------------------------ST7735S Power Sequence---------------------------------//
LCD_WR_REG(0xC0);
LCD_WR_DATA8(0x28);
LCD_WR_DATA8(0x08);
LCD_WR_DATA8(0x04);
LCD_WR_REG(0xC1);
LCD_WR_DATA8(0XC0);
LCD_WR_REG(0xC2);
LCD_WR_DATA8(0x0D);
LCD_WR_DATA8(0x00);
LCD_WR_REG(0xC3);
LCD_WR_DATA8(0x8D);
LCD_WR_DATA8(0x2A);
LCD_WR_REG(0xC4);
LCD_WR_DATA8(0x8D);
LCD_WR_DATA8(0xEE);
//---------------------------------End ST7735S Power Sequence-------------------------------------//
LCD_WR_REG(0xC5); //VCOM
LCD_WR_DATA8(0x1A);
LCD_WR_REG(0x36); //MX, MY, RGB mode
if(USE_HORIZONTAL==0)LCD_WR_DATA8(0x00);
else if(USE_HORIZONTAL==1)LCD_WR_DATA8(0xC0);
else if(USE_HORIZONTAL==2)LCD_WR_DATA8(0x70);
else LCD_WR_DATA8(0xA0);
//------------------------------------ST7735S Gamma Sequence---------------------------------//
LCD_WR_REG(0xE0);
LCD_WR_DATA8(0x04);
LCD_WR_DATA8(0x22);
LCD_WR_DATA8(0x07);
LCD_WR_DATA8(0x0A);
LCD_WR_DATA8(0x2E);
LCD_WR_DATA8(0x30);
LCD_WR_DATA8(0x25);
LCD_WR_DATA8(0x2A);
LCD_WR_DATA8(0x28);
LCD_WR_DATA8(0x26);
LCD_WR_DATA8(0x2E);
LCD_WR_DATA8(0x3A);
LCD_WR_DATA8(0x00);
LCD_WR_DATA8(0x01);
LCD_WR_DATA8(0x03);
LCD_WR_DATA8(0x13);
LCD_WR_REG(0xE1);
LCD_WR_DATA8(0x04);
LCD_WR_DATA8(0x16);
LCD_WR_DATA8(0x06);
LCD_WR_DATA8(0x0D);
LCD_WR_DATA8(0x2D);
LCD_WR_DATA8(0x26);
LCD_WR_DATA8(0x23);
LCD_WR_DATA8(0x27);
LCD_WR_DATA8(0x27);
LCD_WR_DATA8(0x25);
LCD_WR_DATA8(0x2D);
LCD_WR_DATA8(0x3B);
LCD_WR_DATA8(0x00);
LCD_WR_DATA8(0x01);
LCD_WR_DATA8(0x04);
LCD_WR_DATA8(0x13);
//------------------------------------End ST7735S Gamma Sequence-----------------------------//
LCD_WR_REG(0x3A); //65k mode
LCD_WR_DATA8(0x05);
LCD_WR_REG(0x29); //Display on
}

复制代码

lcd_init.h

#ifndef __LCD_INIT_H
#define __LCD_INIT_H
#include "board.h"
#include "pin_mux.h"
#include "lcd.h"
#define USE_HORIZONTAL 1 //设置横屏或者竖屏显示 0或1为竖屏 2或3为横屏
typedef uint32_t u32;
typedef uint16_t u16;
typedef uint8_t u8;
#if USE_HORIZONTAL==0||USE_HORIZONTAL==1
#define LCD_W 128
#define LCD_H 160
#else
#define LCD_W 160
#define LCD_H 128
#endif
#define BOARD_LCD_SCLK_GPIO GPIO4
#define BOARD_LCD_GPIO_SCLK_PIN (1U)
#define BOARD_LCD_CS_GPIO GPIO0
#define BOARD_LCD_GPIO_CS_PIN (12U)
#define BOARD_LCD_MOSI_GPIO GPIO4
#define BOARD_LCD_GPIO_MOSI_PIN (0U)
#define BOARD_LCD_DC_GPIO GPIO0
#define BOARD_LCD_GPIO_DC_PIN (7U)
#define BOARD_LCD_RES_GPIO GPIO4
#define BOARD_LCD_GPIO_RES_PIN (7U)
#define BOARD_LCD_BLK_GPIO GPIO4
#define BOARD_LCD_GPIO_BLK_PIN (5U)
//-----------------LCD端口定义----------------
#define LCD_SCLK_Clr() GPIO_PinWrite(BOARD_LCD_SCLK_GPIO,BOARD_LCD_GPIO_SCLK_PIN,0)//SCL SCLK
#define LCD_SCLK_Set() GPIO_PinWrite(BOARD_LCD_SCLK_GPIO,BOARD_LCD_GPIO_SCLK_PIN,1)
#define LCD_CS_Clr() GPIO_PinWrite(BOARD_LCD_CS_GPIO,BOARD_LCD_GPIO_CS_PIN,0)//CS
#define LCD_CS_Set() GPIO_PinWrite(BOARD_LCD_CS_GPIO,BOARD_LCD_GPIO_CS_PIN,1)
#define LCD_MOSI_Clr() GPIO_PinWrite(BOARD_LCD_MOSI_GPIO,BOARD_LCD_GPIO_MOSI_PIN,0)//SDA MOSI
#define LCD_MOSI_Set() GPIO_PinWrite(BOARD_LCD_MOSI_GPIO,BOARD_LCD_GPIO_MOSI_PIN,1)
#define LCD_DC_Clr() GPIO_PinWrite(BOARD_LCD_DC_GPIO,BOARD_LCD_GPIO_DC_PIN,0)//DC
#define LCD_DC_Set() GPIO_PinWrite(BOARD_LCD_DC_GPIO,BOARD_LCD_GPIO_DC_PIN,1)
#define LCD_RES_Clr() GPIO_PinWrite(BOARD_LCD_RES_GPIO,BOARD_LCD_GPIO_RES_PIN,0)//RES
#define LCD_RES_Set() GPIO_PinWrite(BOARD_LCD_RES_GPIO,BOARD_LCD_GPIO_RES_PIN,1)
#define LCD_BLK_Clr() GPIO_PinWrite(BOARD_LCD_BLK_GPIO,BOARD_LCD_GPIO_BLK_PIN,0)//BLK
#define LCD_BLK_Set() GPIO_PinWrite(BOARD_LCD_BLK_GPIO,BOARD_LCD_GPIO_BLK_PIN,1)
void LCD_GPIO_Init(void);//初始化GPIO
void LCD_Writ_Bus(u8 dat);//模拟SPI时序
void LCD_WR_DATA8(u8 dat);//写入一个字节
void LCD_WR_DATA(u16 dat);//写入两个字节
void LCD_WR_REG(u8 dat);//写入一个指令
void LCD_Address_Set(u16 x1,u16 y1,u16 x2,u16 y2);//设置坐标函数
void LCD_Init(void);//LCD初始化
#endif

复制代码

其它显示字符的接口函数如下：

/******************************************************************************
函数说明：显示汉字串
入口数据：x,y显示坐标
*s 要显示的汉字串
fc 字的颜色
bc 字的背景色
sizey 字号可选 16 24 32
mode: 0非叠加模式 1叠加模式
返回值：无
******************************************************************************/
void LCD_ShowChinese(u16 x,u16 y,u8 *s,u16 fc,u16 bc,u8 sizey,u8 mode)
{
while(*s!=0)
{
if(sizey==12) LCD_ShowChinese12x12(x,y,s,fc,bc,sizey,mode);
else if(sizey==16) LCD_ShowChinese16x16(x,y,s,fc,bc,sizey,mode);
else if(sizey==24) LCD_ShowChinese24x24(x,y,s,fc,bc,sizey,mode);
else if(sizey==32) LCD_ShowChinese32x32(x,y,s,fc,bc,sizey,mode);
else return;
s+=1;
x+=((128/sizey)+(128%sizey));
}
}
/******************************************************************************
函数说明：显示单个12x12汉字
入口数据：x,y显示坐标
*s 要显示的汉字
fc 字的颜色
bc 字的背景色
sizey 字号
mode: 0非叠加模式 1叠加模式
返回值：无
******************************************************************************/
void LCD_ShowChinese12x12(u16 x,u16 y,u8 *s,u16 fc,u16 bc,u8 sizey,u8 mode)
{
u8 i,j,m=0;
u16 k;
u16 HZnum;//汉字数目
u16 TypefaceNum;//一个字符所占字节大小
u16 x0=x;
TypefaceNum=(sizey/8+((sizey%8)?1:0))*sizey;
HZnum=sizeof(tfont12)/sizeof(typFNT_GB12); //统计汉字数目
for(k=0;k<HZnum;k++)
{
if((tfont12[k].Index[0]==*(s))&&(tfont12[k].Index[1]==*(s+1)))
{
LCD_Address_Set(x,y,x+sizey-1,y+sizey-1);
for(i=0;i<TypefaceNum;i++)
{
for(j=0;j<8;j++)
{
if(!mode)//非叠加方式
{
if(tfont12[k].Msk[i]&(0x01<<j))LCD_WR_DATA(fc);
else LCD_WR_DATA(bc);
m++;
if(m%sizey==0)
{
m=0;
break;
}
}
else//叠加方式
{
if(tfont12[k].Msk[i]&(0x01<<j)) LCD_DrawPoint(x,y,fc);//画一个点
x++;
if((x-x0)==sizey)
{
x=x0;
y++;
break;
}
}
}
}
}
continue; //查找到对应点阵字库立即退出，防止多个汉字重复取模带来影响
}
}
/******************************************************************************
函数说明：显示单个16x16汉字
入口数据：x,y显示坐标
*s 要显示的汉字
fc 字的颜色
bc 字的背景色
sizey 字号
mode: 0非叠加模式 1叠加模式
返回值：无
******************************************************************************/
void LCD_ShowChinese16x16(u16 x,u16 y,u8 *s,u16 fc,u16 bc,u8 sizey,u8 mode)
{
u8 i,j,m=0;
u16 k;
u16 HZnum;//汉字数目
u16 TypefaceNum;//一个字符所占字节大小
u16 x0=x;
TypefaceNum=(sizey/8+((sizey%8)?1:0))*sizey;
HZnum=sizeof(tfont16)/sizeof(typFNT_GB16); //统计汉字数目
for(k=0;k<HZnum;k++)
{
if ((tfont16[k].Index[0]==*(s))&&(tfont16[k].Index[1]==*(s+1)))
{
LCD_Address_Set(x,y,x+sizey-1,y+sizey-1);
for(i=0;i<TypefaceNum;i++)
{
for(j=0;j<8;j++)
{
if(!mode)//非叠加方式
{
if(tfont16[k].Msk[i]&(0x01<<j))LCD_WR_DATA(fc);
else LCD_WR_DATA(bc);
m++;
if(m%sizey==0)
{
m=0;
break;
}
}
else//叠加方式
{
if(tfont16[k].Msk[i]&(0x01<<j)) LCD_DrawPoint(x,y,fc);//画一个点
x++;
if((x-x0)==sizey)
{
x=x0;
y++;
break;
}
}
}
}
}
continue; //查找到对应点阵字库立即退出，防止多个汉字重复取模带来影响
}
}
/******************************************************************************
函数说明：显示单个24x24汉字
入口数据：x,y显示坐标
*s 要显示的汉字
fc 字的颜色
bc 字的背景色
sizey 字号
mode: 0非叠加模式 1叠加模式
返回值：无
******************************************************************************/
void LCD_ShowChinese24x24(u16 x,u16 y,u8 *s,u16 fc,u16 bc,u8 sizey,u8 mode)
{
u8 i,j,m=0;
u16 k;
u16 HZnum;//汉字数目
u16 TypefaceNum;//一个字符所占字节大小
u16 x0=x;
TypefaceNum=(sizey/8+((sizey%8)?1:0))*sizey;
HZnum=sizeof(tfont24)/sizeof(typFNT_GB24); //统计汉字数目
for(k=0;k<HZnum;k++)
{
if ((tfont24[k].Index[0]==*(s))&&(tfont24[k].Index[1]==*(s+1)))
{
LCD_Address_Set(x,y,x+sizey-1,y+sizey-1);
for(i=0;i<TypefaceNum;i++)
{
for(j=0;j<8;j++)
{
if(!mode)//非叠加方式
{
if(tfont24[k].Msk[i]&(0x01<<j))LCD_WR_DATA(fc);
else LCD_WR_DATA(bc);
m++;
if(m%sizey==0)
{
m=0;
break;
}
}
else//叠加方式
{
if(tfont24[k].Msk[i]&(0x01<<j)) LCD_DrawPoint(x,y,fc);//画一个点
x++;
if((x-x0)==sizey)
{
x=x0;
y++;
break;
}
}
}
}
}
continue; //查找到对应点阵字库立即退出，防止多个汉字重复取模带来影响
}
}
/******************************************************************************
函数说明：显示单个32x32汉字
入口数据：x,y显示坐标
*s 要显示的汉字
fc 字的颜色
bc 字的背景色
sizey 字号
mode: 0非叠加模式 1叠加模式
返回值：无
******************************************************************************/
void LCD_ShowChinese32x32(u16 x,u16 y,u8 *s,u16 fc,u16 bc,u8 sizey,u8 mode)
{
u8 i,j,m=0;
u16 k;
u16 HZnum;//汉字数目
u16 TypefaceNum;//一个字符所占字节大小
u16 x0=x;
TypefaceNum=(sizey/8+((sizey%8)?1:0))*sizey;
HZnum=sizeof(tfont32)/sizeof(typFNT_GB32); //统计汉字数目
for(k=0;k<HZnum;k++)
{
if ((tfont32[k].Index[0]==*(s))&&(tfont32[k].Index[1]==*(s+1)))
{
LCD_Address_Set(x,y,x+sizey-1,y+sizey-1);
for(i=0;i<TypefaceNum;i++)
{
for(j=0;j<8;j++)
{
if(!mode)//非叠加方式
{
if(tfont32[k].Msk[i]&(0x01<<j))LCD_WR_DATA(fc);
else LCD_WR_DATA(bc);
m++;
if(m%sizey==0)
{
m=0;
break;
}
}
else//叠加方式
{
if(tfont32[k].Msk[i]&(0x01<<j)) LCD_DrawPoint(x,y,fc);//画一个点
x++;
if((x-x0)==sizey)
{
x=x0;
y++;
break;
}
}
}
}
}
continue; //查找到对应点阵字库立即退出，防止多个汉字重复取模带来影响
}
}
/******************************************************************************
函数说明：显示单个字符
入口数据：x,y显示坐标
num 要显示的字符
fc 字的颜色
bc 字的背景色
sizey 字号
mode: 0非叠加模式 1叠加模式
返回值：无
******************************************************************************/
void LCD_ShowChar(u16 x,u16 y,u8 num,u16 fc,u16 bc,u8 sizey,u8 mode)
{
u8 temp,sizex,t,m=0;
u16 i,TypefaceNum;//一个字符所占字节大小
u16 x0=x;
sizex=sizey/2;
TypefaceNum=(sizex/8+((sizex%8)?1:0))*sizey;
num=num-' '; //得到偏移后的值
LCD_Address_Set(x,y,x+sizex-1,y+sizey-1); //设置光标位置
for(i=0;i<TypefaceNum;i++)
{
if(sizey==12)temp=ascii_1206[num][i]; //调用6x12字体
else if(sizey==16)temp=ascii_1608[num][i]; //调用8x16字体
else if(sizey==24)temp=ascii_2412[num][i]; //调用12x24字体
else if(sizey==32)temp=ascii_3216[num][i]; //调用16x32字体
else return;
for(t=0;t<8;t++)
{
if(!mode)//非叠加模式
{
if(temp&(0x01<<t))LCD_WR_DATA(fc);
else LCD_WR_DATA(bc);
m++;
if(m%sizex==0)
{
m=0;
break;
}
}
else//叠加模式
{
if(temp&(0x01<<t))LCD_DrawPoint(x,y,fc);//画一个点
x++;
if((x-x0)==sizex)
{
x=x0;
y++;
break;
}
}
}
}
}
/******************************************************************************
函数说明：显示字符串
入口数据：x,y显示坐标
*p 要显示的字符串
fc 字的颜色
bc 字的背景色
sizey 字号
mode: 0非叠加模式 1叠加模式
返回值：无
******************************************************************************/
void LCD_ShowString(u16 x,u16 y,const u8 *p,u16 fc,u16 bc,u8 sizey,u8 mode)
{
while(*p!='\0')
{
LCD_ShowChar(x,y,*p,fc,bc,sizey,mode);
x+=sizey/2;
p++;
}
}

复制代码

main.c

#include "pin_mux.h"
#include "peripherals.h"
#include "board.h"
#include "pic.h"
#include "lcd_init.h"
/*******************************************************************************
* Definitions
******************************************************************************/
typedef struct
{
unsigned char Index[2];
unsigned char Msk[32];
}typFNT_GB16;
/*******************************************************************************
* Prototypes
******************************************************************************/
extern const typFNT_GB16 tfont16[];
/*******************************************************************************
* Variables
******************************************************************************/
volatile uint32_t g_systickCounter;
/*******************************************************************************
* Code
******************************************************************************/
void SysTick_Handler(void)
{
if (g_systickCounter != 0U)
{
g_systickCounter--;
}
}
void SysTick_DelayTicks(uint32_t n)
{
g_systickCounter = n;
while (g_systickCounter != 0U)
{
}
}
void Display_title(void)
{
LCD_Fill(0,0,LCD_W,LCD_H,WHITE);
LCD_ShowIntNum(8,10,2024,4,RED,BLACK,16);
LCD_ShowChinese(40,10,&tfont16[0],RED,BLACK,16,0);
LCD_ShowChinese(56,10,&tfont16[1],RED,BLACK,16,0);
LCD_ShowChinese(72,10,&tfont16[2],RED,BLACK,16,0);
LCD_ShowChinese(88,10,&tfont16[3],RED,BLACK,16,0);
LCD_ShowChinese(104,10,&tfont16[4],RED,BLACK,16,0);
LCD_ShowChinese(8,30,&tfont16[5],RED,BLACK,16,0);
LCD_ShowChinese(24,30,&tfont16[6],RED,BLACK,16,0);
LCD_ShowString(40,30,"MCX",RED,BLACK,16,0);
LCD_ShowString(64,30," ",BLACK,BLACK,16,0);
LCD_ShowString(72,30,"N",RED,BLACK,16,0);
LCD_ShowString(80,30," ",BLACK,BLACK,16,0);
LCD_ShowChinese(88,30,&tfont16[7],RED,BLACK,16,0);
LCD_ShowChinese(104,30,&tfont16[8],RED,BLACK,16,0);
LCD_ShowChinese(8,50,&tfont16[9],RED,BLACK,16,0);
LCD_ShowChinese(24,50,&tfont16[10],RED,BLACK,16,0);
LCD_ShowChinese(40,50,&tfont16[11],RED,BLACK,16,0);
LCD_ShowChinese(56,50,&tfont16[12],RED,BLACK,16,0);
LCD_ShowChinese(72,50,&tfont16[13],RED,BLACK,16,0);
LCD_ShowChinese(88,50,&tfont16[5],RED,BLACK,16,0);
LCD_ShowChinese(104,50,&tfont16[14],RED,BLACK,16,0);
LCD_ShowChinese(8,70,&tfont16[15],RED,BLACK,16,0);
LCD_ShowChinese(24,70,&tfont16[16],RED,BLACK,16,0);
LCD_ShowString(56,70,"2024-12-02",BLUE,BROWN,12,0);
for(uint8_t num=0; num<3; num++)
{
LCD_ShowPicture(0,87,128,160,gImage_21);
LCD_ShowPicture(0,87,128,160,gImage_22);
LCD_ShowPicture(0,87,128,160,gImage_23);
LCD_ShowPicture(0,87,128,160,gImage_24);
LCD_ShowPicture(0,87,128,160,gImage_25);
}
}
int main(void)
{
/* Board pin init */
CLOCK_EnableClock(kCLOCK_Gpio0);
CLOCK_EnableClock(kCLOCK_Gpio1);
CLOCK_EnableClock(kCLOCK_Gpio4);
BOARD_InitPins();
LED_RED_INIT(LOGIC_LED_OFF);
LED_BLUE_INIT(LOGIC_LED_OFF);
LED_GREEN_INIT(LOGIC_LED_OFF);
/* Set systick reload value to generate 1us interrupt */
if (SysTick_Config(SystemCoreClock / 1000000U))
{
while (1)
{
}
}
LCD_Init();
SysTick_DelayTicks(200U);
LCD_Fill(0,0,LCD_W,LCD_H,YELLOW);
SysTick_DelayTicks(200);
LCD_Fill(0,0,LCD_W,LCD_H,WHITE);
while (1)
{
LCD_ShowPicture(4,0,128,160,gImage_1);
Display_title();
}
}

复制代码

四、下载运行
编译通过后，将程序下载到FRDM-MCXN947开发板中，显示效果如下：

NXP FRDM-MCXN947驱动TFT-LCD屏
https://www.bilibili.com/video/BV1bTzSYfEyh/
[media=x,500,375][/media]
http://【NXP FRDM-MCXN947驱动TFT-LCD屏】 https://www.bilibili.com/video/BV1bTzSYfEyh/?share_source=copy_web&vd_source=e6778606bed9c8e5e7d4db72f6889b7f

【Avnet | NXP FRDM-MCXN947试用活动】驱动TFT彩屏

yinwuqing LV8

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