【Avnet | NXP FRDM-MCXN947试用活动】硬件SPI驱动LCD显示屏
测试SPI驱动LCD显示屏。一、硬件部分
1.1、硬件SPI接口部分
使用FC1接口的SPI，对应的电路图部分
1.2、测试的LCD显示模块
接口定义
二、程序部分
2.1、LCD接口硬件配置
2.1.1、SPI引脚配置
2.1.2、控制引脚配置
2.2、SPI初始化部分
spi.c
#include "main.h"
void init_spi(void)
{
uint32_t srcClock_Hz;
lpspi_master_config_t masterConfig;
edma_config_t userConfig = {0};
/* attach FRO 12M to FLEXCOMM1 */
CLOCK_SetClkDiv(kCLOCK_DivFlexcom1Clk, 1u);
CLOCK_AttachClk(kFRO12M_to_FLEXCOMM1);
init_spi1_pins();
/*Master config*/
LPSPI_MasterGetDefaultConfig(&masterConfig);
masterConfig.baudRate = TRANSFER_BAUDRATE;
masterConfig.whichPcs = EXAMPLE_LPSPI_MASTER_PCS_FOR_INIT;
masterConfig.pcsToSckDelayInNanoSec = 1000000000U / (masterConfig.baudRate * 2U);
masterConfig.lastSckToPcsDelayInNanoSec = 1000000000U / (masterConfig.baudRate * 2U);
masterConfig.betweenTransferDelayInNanoSec = 1000000000U / (masterConfig.baudRate * 2U);
srcClock_Hz = LPSPI_MASTER_CLK_FREQ;
LPSPI_MasterInit(EXAMPLE_LPSPI_MASTER_BASEADDR, &masterConfig, srcClock_Hz);
}
uint8_t spi1_writedat(uint8_t dat)
{
uint8_t srcBuff;
uint8_t destBuff;
srcBuff=dat;
lpspi_transfer_t masterXfer;
// /*Start master transfer*/
masterXfer.txData = srcBuff;//masterTxData;
masterXfer.rxData = destBuff;
masterXfer.dataSize = 1;
masterXfer.configFlags =
EXAMPLE_LPSPI_MASTER_PCS_FOR_TRANSFER | kLPSPI_MasterPcsContinuous | kLPSPI_MasterByteSwap;
LPSPI_MasterTransferBlocking(EXAMPLE_LPSPI_MASTER_BASEADDR, &masterXfer);
return destBuff;
}
spi.h
#ifndef __SPI_H
#define __SPI_H
#define LPSPI_MASTER_CLK_FREQ CLOCK_GetLPFlexCommClkFreq(1u)
#define EXAMPLE_LPSPI_MASTER_BASEADDR (LPSPI1)
#define EXAMPLE_LPSPI_MASTER_PCS_FOR_INIT (kLPSPI_Pcs0)
#define EXAMPLE_LPSPI_MASTER_PCS_FOR_TRANSFER (kLPSPI_MasterPcs0)
#define EXAMPLE_LPSPI_MASTER_DMA_BASE DMA0
#define EXAMPLE_LPSPI_MASTER_DMA_RX_CHANNEL 0U
#define EXAMPLE_LPSPI_MASTER_DMA_TX_CHANNEL 1U
#define DEMO_LPSPI_TRANSMIT_EDMA_CHANNEL kDmaRequestMuxLpFlexcomm1Tx
#define DEMO_LPSPI_RECEIVE_EDMA_CHANNEL kDmaRequestMuxLpFlexcomm1Rx
#define TRANSFER_SIZE 64U
#define TRANSFER_BAUDRATE 50000000U
void init_spi(void);
uint8_t spi1_writedat(uint8_t dat);
#endif
2.2、lcd驱动程序
lcd_init.c
#include "main.h"
void LCD_GPIO_Init(void)
{
gpio_pin_config_t spilcd_config = {
kGPIO_DigitalOutput,
0,
};
CLOCK_EnableClock(kCLOCK_Gpio1);
init_spi_lcd_pins();
GPIO_PinInit(LCD_RES_GPIO, LCD_RES_GPIO_PIN, &spilcd_config);
GPIO_PinInit(LCD_DC_GPIO, LCD_DC_GPIO_PIN, &spilcd_config);
GPIO_PinInit(LCD_CS_GPIO, LCD_CS_GPIO_PIN, &spilcd_config);
}
void LCD_Writ_Bus(uint8_t dat)
{
uint8_t i;
LCD_CS_Clr();
spi1_writedat(dat);
LCD_CS_Set();
}
void LCD_WR_DATA8(uint8_t dat)
{
LCD_Writ_Bus(dat);
}
void LCD_WR_DATA(uint16_t dat)
{
LCD_Writ_Bus(dat>>8);
LCD_Writ_Bus(dat);
}
void LCD_WR_REG(uint8_t dat)
{
LCD_DC_Clr();//写命令
LCD_Writ_Bus(dat);
LCD_DC_Set();//写数据
}
void LCD_Address_Set(uint16_t x1,uint16_t y1,uint16_t x2,uint16_t 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_GPIO_Init();//初始化GPIO
LCD_RES_Clr();//复位
SysTick_Delay_ms(100);
LCD_RES_Set();
SysTick_Delay_ms(100);
//LCD_BLK_Set();//打开背光
SysTick_Delay_ms(100);
//************* Start Initial Sequence **********//
LCD_WR_REG(0x11); //Sleep out
SysTick_Delay_ms(120); //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
}
lcd.c
#include "main.h"
#include "spilcd/lcdfont.h"
void LCD_Fill(uint16_t xsta,uint16_t ysta,uint16_t xend,uint16_t yend,uint16_t color)
{
uint16_t i,j;
LCD_Address_Set(xsta,ysta,xend-1,yend-1);
for(i=ysta;i<yend;i++)
{
for(j=xsta;j<xend;j++)
{
LCD_WR_DATA(color);
}
}
}
void LCD_DrawPoint(uint16_t x,uint16_t y,uint16_t color)
{
LCD_Address_Set(x,y,x,y);
LCD_WR_DATA(color);
}
void LCD_DrawLine(uint16_t x1,uint16_t y1,uint16_t x2,uint16_t y2,uint16_t color)
{
uint16_t t;
int xerr=0,yerr=0,delta_x,delta_y,distance;
int incx,incy,uRow,uCol;
delta_x=x2-x1;
delta_y=y2-y1;
uRow=x1;
uCol=y1;
if(delta_x>0)incx=1;
else if (delta_x==0)incx=0;
else {incx=-1;delta_x=-delta_x;}
if(delta_y>0)incy=1;
else if (delta_y==0)incy=0;
else {incy=-1;delta_y=-delta_y;}
if(delta_x>delta_y)distance=delta_x;
else distance=delta_y;
for(t=0;t<distance+1;t++)
{
LCD_DrawPoint(uRow,uCol,color);
xerr+=delta_x;
yerr+=delta_y;
if(xerr>distance)
{
xerr-=distance;
uRow+=incx;
}
if(yerr>distance)
{
yerr-=distance;
uCol+=incy;
}
}
}
void LCD_DrawRectangle(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2,uint16_t color)
{
LCD_DrawLine(x1,y1,x2,y1,color);
LCD_DrawLine(x1,y1,x1,y2,color);
LCD_DrawLine(x1,y2,x2,y2,color);
LCD_DrawLine(x2,y1,x2,y2,color);
}
void Draw_Circle(uint16_t x0,uint16_t y0,uint8_t r,uint16_t color)
{
int a,b;
a=0;b=r;
while(a<=b)
{
LCD_DrawPoint(x0-b,y0-a,color); //3
LCD_DrawPoint(x0+b,y0-a,color); //0
LCD_DrawPoint(x0-a,y0+b,color); //1
LCD_DrawPoint(x0-a,y0-b,color); //2
LCD_DrawPoint(x0+b,y0+a,color); //4
LCD_DrawPoint(x0+a,y0-b,color); //5
LCD_DrawPoint(x0+a,y0+b,color); //6
LCD_DrawPoint(x0-b,y0+a,color); //7
a++;
if((a*a+b*b)>(r*r))//判断要画的点是否过远
{
b--;
}
}
}
void LCD_ShowChinese(uint16_t x,uint16_t y,uint8_t *s,uint16_t fc,uint16_t bc,uint8_t sizey,uint8_t 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+=2;
x+=sizey;
}
}
void LCD_ShowChinese12x12(uint16_t x,uint16_t y,uint8_t *s,uint16_t fc,uint16_t bc,uint8_t sizey,uint8_t mode)
{
uint8_t i,j,m=0;
uint16_t k;
uint16_t HZnum;//汉字数目
uint16_t TypefaceNum;//一个字符所占字节大小
uint16_t 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.Index==*(s))&&(tfont12.Index==*(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.Msk&(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.Msk&(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
}
}
void LCD_ShowChinese16x16(uint16_t x,uint16_t y,uint8_t *s,uint16_t fc,uint16_t bc,uint8_t sizey,uint8_t mode)
{
uint8_t i,j,m=0;
uint16_t k;
uint16_t HZnum;//汉字数目
uint16_t TypefaceNum;//一个字符所占字节大小
uint16_t 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.Index==*(s))&&(tfont16.Index==*(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.Msk&(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.Msk&(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
}
}
void LCD_ShowChinese24x24(uint16_t x,uint16_t y,uint8_t *s,uint16_t fc,uint16_t bc,uint8_t sizey,uint8_t mode)
{
uint8_t i,j,m=0;
uint16_t k;
uint16_t HZnum;//汉字数目
uint16_t TypefaceNum;//一个字符所占字节大小
uint16_t 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.Index==*(s))&&(tfont24.Index==*(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.Msk&(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.Msk&(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
}
}
void LCD_ShowChinese32x32(uint16_t x,uint16_t y,uint8_t *s,uint16_t fc,uint16_t bc,uint8_t sizey,uint8_t mode)
{
uint8_t i,j,m=0;
uint16_t k;
uint16_t HZnum;//汉字数目
uint16_t TypefaceNum;//一个字符所占字节大小
uint16_t 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.Index==*(s))&&(tfont32.Index==*(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.Msk&(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.Msk&(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
}
}
void LCD_ShowChar(uint16_t x,uint16_t y,uint8_t num,uint16_t fc,uint16_t bc,uint8_t sizey,uint8_t mode)
{
uint8_t temp,sizex,t,m=0;
uint16_t i,TypefaceNum;//一个字符所占字节大小
uint16_t 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; //调用6x12字体
else if(sizey==16)temp=ascii_1608; //调用8x16字体
else if(sizey==24)temp=ascii_2412; //调用12x24字体
else if(sizey==32)temp=ascii_3216; //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;
}
}
}
}
}
void LCD_ShowString(uint16_t x,uint16_t y,const uint8_t *p,uint16_t fc,uint16_t bc,uint8_t sizey,uint8_t mode)
{
while(*p!='\0')
{
LCD_ShowChar(x,y,*p,fc,bc,sizey,mode);
x+=sizey/2;
p++;
}
}
uint32_t mypow(uint8_t m,uint8_t n)
{
uint32_t result=1;
while(n--)result*=m;
return result;
}
void LCD_ShowIntNum(uint16_t x,uint16_t y,uint16_t num,uint8_t len,uint16_t fc,uint16_t bc,uint8_t sizey)
{
uint8_t t,temp;
uint8_t enshow=0;
uint8_t sizex=sizey/2;
for(t=0;t<len;t++)
{
temp=(num/mypow(10,len-t-1))%10;
if(enshow==0&&t<(len-1))
{
if(temp==0)
{
LCD_ShowChar(x+t*sizex,y,' ',fc,bc,sizey,0);
continue;
}else enshow=1;
}
LCD_ShowChar(x+t*sizex,y,temp+48,fc,bc,sizey,0);
}
}
void LCD_ShowFloatNum1(uint16_t x,uint16_t y,float num,uint8_t len,uint16_t fc,uint16_t bc,uint8_t sizey)
{
uint8_t t,temp,sizex;
uint16_t num1;
sizex=sizey/2;
num1=num*100;
for(t=0;t<len;t++)
{
temp=(num1/mypow(10,len-t-1))%10;
if(t==(len-2))
{
LCD_ShowChar(x+(len-2)*sizex,y,'.',fc,bc,sizey,0);
t++;
len+=1;
}
LCD_ShowChar(x+t*sizex,y,temp+48,fc,bc,sizey,0);
}
}
void LCD_ShowPicture(uint16_t x,uint16_t y,uint16_t length,uint16_t width,const uint8_t pic[])
{
uint16_t i,j;
uint32_t k=0;
LCD_Address_Set(x,y,x+length-1,y+width-1);
for(i=0;i<length;i++)
{
for(j=0;j<width;j++)
{
LCD_WR_DATA8(pic);
LCD_WR_DATA8(pic);
k++;
}
}
}
2.3、main.c
#include "main.h"
int main(void)
{
uint8_t i;
CLOCK_EnableClock(kCLOCK_Gpio0);
BOARD_InitDEBUG_UARTPins();
BOARD_PowerMode_OD();
BOARD_InitBootClocks();
BOARD_InitDebugConsole();
SysTick_Init();
init_led();
init_spi();
LCD_Init();//LCD初始化
LCD_Fill(0,0,LCD_W,LCD_H,WHITE);
LCD_ShowChinese(16,1,"与非网论坛",RED,WHITE,16,0);
LCD_DrawLine(0,18,128,18,BLUE);
LCD_ShowString(0,19,"IC:MCXN947",RED,WHITE,16,0);
LCD_ShowString(0,36,"LCD:ST7735",GREEN,WHITE,16,0);
LCD_ShowString(0,52,"MODE:SPI",BLUE,WHITE,16,0);
while (1)
{
i++;
SysTick_Delay_ms(100);
LCD_ShowIntNum(0,78,i,3,BLUE,WHITE,16);
led_green_tog();
}
}
三、程序运行
程序运行结果
支持一下大佬~~
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