PIC24F16KL402开发板使用笔记六: SPI驱动2.2TFT LCD

使用内总RC振荡，4倍频，提供给SPI模块，速度还是不太理想。
SPI四分频

/*
* File: main_tftlcd.c
* Author: Administrator
*
* Created on 2015?4?4?, ??3:41
*/
#include "xc.h"
#include "lcd.h"
_FBS
(
BWRP_OFF & // Boot Segment Write Protect (Disabled)
BSS_OFF // Boot segment Protect (No boot flash segment)
)
//_FGS
//(
// GWRP_OFF & // General Segment Flash Write Protect (General segment may be written)
// GSS0_OFF // General Segment Code Protect (No Protection)
//)
_FOSCSEL
(
FNOSC_FRCPLL & // Oscillator Select (8MHz FRC with Postscaler (FRCDIV))
// SOSCSRC_ANA & // SOSC Source Type (Analog Mode for use with crystal)
// LPRCSEL_HP & // LPRC Power and Accuracy (High Power/High Accuracy)
IESO_ON // Internal External Switch Over bit (Internal External Switchover mode enabled (Two-speed Start-up enabled))
)
_FOSC
(
// POSCMD_HS & // Primary Oscillator Mode (Primary oscillator disabled)
OSCIOFNC_ON & // CLKO Enable Configuration bit (CLKO output signal enabled)
POSCFREQ_MS & // Primary Oscillator Frequency Range Configuration bits (Primary oscillator/external clock frequency between 100kHz to 8MHz)
SOSCSEL_SOSCHP &// SOSC Power Selection Configuration bits (Secondary Oscillator configured for high-power operation)
FCKSM_CSECME // Clock Switching and Monitor Selection (Clock Switching and Fail-safe Clock Monitor Enabled)
)
_FWDT
(
// WDTPS_PS32768 & // Watchdog Timer Postscale Select bits (1:32768)
FWPSA_PR128 & // WDT Prescaler bit (WDT prescaler ratio of 1:128)
FWDTEN_OFF & // Watchdog Timer Enable bits (WDT disabled in hardware; SWDTEN bit disabled)
WINDIS_OFF // Windowed Watchdog Timer Disable bit (Standard WDT selected (windowed WDT disabled))
)
// Warning:
// Always enable MCLRE_ON config bit setting so that the MCLR pin function will
// work for low-voltage In-Circuit Serial Programming (ICSP). The Microstick
// programming circuitry only supports low-voltage ICSP. If you disable MCLR pin
// functionality, a high-voltage ICSP tool will be required to re-program the
// part in the future.
_FPOR
(
BOREN_BOR3 & // Brown-out Reset Enable bits (Enabled in hardware; SBOREN bit disabled)
PWRTEN_ON & // Power-up Timer Enable (PWRT enabled)
I2C1SEL_PRI & // Alternate I2C1 Pin Mapping bit (Default SCL1/SDA1 Pins for I2C1)
BORV_V18 & // Brown-out Reset Voltage bits (Brown-out Reset at 1.8V)
MCLRE_ON // MCLR Pin Enable bit (RA5 input disabled; MCLR enabled)
)
_FICD
(
ICS_PGx3 // ICD Pin Placement Select (EMUC/EMUD share PGC3/PGD3)
)
unsigned char data_temp;
void init_channel()
{
//Init SPI pins.
//As master SDI1 is input, SDO1 is ouput, SCK1 is output, SS is output.
;
}
void init_SPI1_IO()
{
ANSAbits.ANSA0 =0;
ANSAbits.ANSA1 = 0;
ANSBbits.ANSB14 = 0;
ANSBbits.ANSB13 = 0;
TRISBbits.TRISB10 = 1; //Set SDI1 as an input.
TRISBbits.TRISB13 = 0; //Set SDO1 as an output.
TRISBbits.TRISB11 = 0; //Set SCK1 as an output.
TRISBbits.TRISB15 = 0; //Set SS1 as an output.
TRISAbits.TRISA0 = 0; //LCD DC pin.
TRISAbits.TRISA1 = 0; //LCD RST pin.
TRISBbits.TRISB14 = 0; //LCD CS pin.
TRISBbits.TRISB3 = 0;
PORTAbits.RA0 = PORTAbits.RA1=PORTBbits.RB14 = 1;
}
void init_SPI1(void)
{
// SPI1CON1 setting
SSP1STAT =0b0000000010000000; //0b 0000 0000 1000 0000 0x0000;
SSP1CON1 = 0b0000000010110000; //0x0021;//
//SSP1CON3bits.BOEN = 0;
SSP1ADD = 0x00fe;
PADCFG1 = 0x0c00; //0b0000 1100 0000 0000
// IFS1bits.SSP1IF = 0;
// IEC1bits.SSP1IE = 1;
// IPC4bits.SSP1IP = 4;
}
void tx_spi_data(unsigned char dat)
{
SSP1BUF = dat;
//while(!IFS1bits.SSP1IF);
while(SSP1STATbits.BF)
// IFS1bits.SSP1IF = 0;
data_temp = SSP1BUF;
}
void delay(unsigned int uiCnt)
{
int i,j;
for(i=0;i<uiCnt;i++)
for(j=0;j<10;j++);
}
int main(void)
{
init_SPI1_IO();
init_SPI1();
Lcd_Init(); //tft初始化
LCD_Clear(BLACK); //清屏
BACK_COLOR=BLACK;;POINT_COLOR=WHITE;
while(1)
{
// Lcd_Init(); //tft初始化
LCD_Clear(RED);
delayms(300);
LCD_Clear(GREEN);
delayms(300);
LCD_Clear(BLUE);
delayms(300);
}
return 0;
}
void __attribute__((interrupt,no_auto_psv)) _SPI1Interrupt(void)
{
//IFS1bits.SSP1IF = 0; //Clear Interrupt status of SPI1
// IEC1bits.SSP1IE = 1;
}

复制代码

#include "font.h"
#include "sys.h"
#include "lcd.h"
//unsigned char bitdata;
extern void tx_spi_data(unsigned char dat);
u16 BACK_COLOR, POINT_COLOR;
void LCD_Writ_Bus(char da)
{
tx_spi_data(da);
}
void LCD_WR_DATA8(char da) //·¢ËÍÊý¾Ý-8Î»²ÎÊý
{
LCD_DC=1;
LCD_Writ_Bus(da);
}
void LCD_WR_DATA(int da)
{
LCD_DC=1;
LCD_Writ_Bus(da>>8);
LCD_Writ_Bus(da);
}
void LCD_WR_REG(char da)
{
LCD_DC=0;
LCD_Writ_Bus(da);
}
void LCD_WR_REG_DATA(int reg,int da)
{
LCD_WR_REG(reg);
LCD_WR_DATA(da);
}
void Address_set(unsigned int x1,unsigned int y1,unsigned int x2,unsigned int y2)
{
LCD_WR_REG(0x2a);
LCD_WR_DATA8(x1>>8);
LCD_WR_DATA8(x1);
LCD_WR_DATA8(x2>>8);
LCD_WR_DATA8(x2);
LCD_WR_REG(0x2b);
LCD_WR_DATA8(y1>>8);
LCD_WR_DATA8(y1);
LCD_WR_DATA8(y2>>8);
LCD_WR_DATA8(y2);
LCD_WR_REG(0x2C);
}
void Lcd_Init(void)
{
LCD_CS =1;
LCD_REST=1;
delayms(5);
LCD_REST=0;
delayms(5);
LCD_REST=1;
LCD_CS=1;
delayms(5);
LCD_CS =0;
LCD_WR_REG(0xCB);
LCD_WR_DATA8(0x39);
LCD_WR_DATA8(0x2C);
LCD_WR_DATA8(0x00);
LCD_WR_DATA8(0x34);
LCD_WR_DATA8(0x02);
LCD_WR_REG(0xCF);
LCD_WR_DATA8(0x00);
LCD_WR_DATA8(0XC1);
LCD_WR_DATA8(0X30);
LCD_WR_REG(0xE8);
LCD_WR_DATA8(0x85);
LCD_WR_DATA8(0x00);
LCD_WR_DATA8(0x78);
LCD_WR_REG(0xEA);
LCD_WR_DATA8(0x00);
LCD_WR_DATA8(0x00);
LCD_WR_REG(0xED);
LCD_WR_DATA8(0x64);
LCD_WR_DATA8(0x03);
LCD_WR_DATA8(0X12);
LCD_WR_DATA8(0X81);
LCD_WR_REG(0xF7);
LCD_WR_DATA8(0x20);
LCD_WR_REG(0xC0); //Power control
LCD_WR_DATA8(0x23); //VRH[5:0]
LCD_WR_REG(0xC1); //Power control
LCD_WR_DATA8(0x10); //SAP[2:0];BT[3:0]
LCD_WR_REG(0xC5); //VCM control
LCD_WR_DATA8(0x3e); //¶Ô±È¶Èµ÷½Ú
LCD_WR_DATA8(0x28);
LCD_WR_REG(0xC7); //VCM control2
LCD_WR_DATA8(0x86); //--
LCD_WR_REG(0x36); // Memory Access Control
LCD_WR_DATA8(0x48); //C8 //48 68ÊúÆÁ//28 E8 ºáÆÁ
LCD_WR_REG(0x3A);
LCD_WR_DATA8(0x55);
LCD_WR_REG(0xB1);
LCD_WR_DATA8(0x00);
LCD_WR_DATA8(0x18);
LCD_WR_REG(0xB6); // Display Function Control
LCD_WR_DATA8(0x08);
LCD_WR_DATA8(0x82);
LCD_WR_DATA8(0x27);
LCD_WR_REG(0xF2); // 3Gamma Function Disable
LCD_WR_DATA8(0x00);
LCD_WR_REG(0x26); //Gamma curve selected
LCD_WR_DATA8(0x01);
LCD_WR_REG(0xE0); //Set Gamma
LCD_WR_DATA8(0x0F);
LCD_WR_DATA8(0x31);
LCD_WR_DATA8(0x2B);
LCD_WR_DATA8(0x0C);
LCD_WR_DATA8(0x0E);
LCD_WR_DATA8(0x08);
LCD_WR_DATA8(0x4E);
LCD_WR_DATA8(0xF1);
LCD_WR_DATA8(0x37);
LCD_WR_DATA8(0x07);
LCD_WR_DATA8(0x10);
LCD_WR_DATA8(0x03);
LCD_WR_DATA8(0x0E);
LCD_WR_DATA8(0x09);
LCD_WR_DATA8(0x00);
LCD_WR_REG(0XE1); //Set Gamma
LCD_WR_DATA8(0x00);
LCD_WR_DATA8(0x0E);
LCD_WR_DATA8(0x14);
LCD_WR_DATA8(0x03);
LCD_WR_DATA8(0x11);
LCD_WR_DATA8(0x07);
LCD_WR_DATA8(0x31);
LCD_WR_DATA8(0xC1);
LCD_WR_DATA8(0x48);
LCD_WR_DATA8(0x08);
LCD_WR_DATA8(0x0F);
LCD_WR_DATA8(0x0C);
LCD_WR_DATA8(0x31);
LCD_WR_DATA8(0x36);
LCD_WR_DATA8(0x0F);
LCD_WR_REG(0x11); //Exit Sleep
delayms(120);
LCD_WR_REG(0x29); //Display on
LCD_WR_REG(0x2c);
}
//ÇåÆÁº¯Êý
//Color:ÒªÇåÆÁµÄÌî³äÉ«
void LCD_Clear(u16 Color)
{
u8 VH,VL;
u16 i,j;
VH=Color>>8;
VL=Color;
Address_set(0,0,LCD_W-1,LCD_H-1);
for(i=0;i<LCD_W;i++)
{
for (j=0;j<LCD_H;j++)
{
LCD_WR_DATA8(VH);
LCD_WR_DATA8(VL);
}
}
}
//ÔÚÖ¸¶¨Î»ÖÃÏÔÊ¾Ò»¸öºº×Ö(32*33´óÐ¡)
//dcolorÎªÄÚÈÝÑÕÉ«£¬gbcolorÎª±³¾²ÑÕÉ«
void showhanzi(unsigned int x,unsigned int y,unsigned char index)
{
unsigned char i,j;
unsigned char *temp=hanzi;
Address_set(x,y,x+31,y+31); //ÉèÖÃÇøÓò
temp+=index*128;
for(j=0;j<128;j++)
{
for(i=0;i<8;i++)
{
if((*temp&(1<<i))!=0)
{
LCD_WR_DATA(POINT_COLOR);
}
else
{
LCD_WR_DATA(BACK_COLOR);
}
}
temp++;
}
}
//»µã
//POINT_COLOR:´ËµãµÄÑÕÉ«
void LCD_DrawPoint(u16 x,u16 y)
{
Address_set(x,y,x,y);//ÉèÖÃ¹â±êÎ»ÖÃ
LCD_WR_DATA(POINT_COLOR);
}
//»Ò»¸ö´óµã
//POINT_COLOR:´ËµãµÄÑÕÉ«
void LCD_DrawPoint_big(u16 x,u16 y)
{
LCD_Fill(x-1,y-1,x+1,y+1,POINT_COLOR);
}
//ÔÚÖ¸¶¨ÇøÓòÄÚÌî³äÖ¸¶¨ÑÕÉ«
//ÇøÓò´óÐ¡:
// (xend-xsta)*(yend-ysta)
void LCD_Fill(u16 xsta,u16 ysta,u16 xend,u16 yend,u16 color)
{
u16 i,j;
Address_set(xsta,ysta,xend,yend); //ÉèÖÃ¹â±êÎ»ÖÃ
for(i=ysta;i<=yend;i++)
{
for(j=xsta;j<=xend;j++)LCD_WR_DATA(color);//ÉèÖÃ¹â±êÎ»ÖÃ
}
}
//»Ïß
//x1,y1:Æðµã×ø±ê
//x2,y2:ÖÕµã×ø±ê
void LCD_DrawLine(u16 x1, u16 y1, u16 x2, u16 y2)
{
u16 t;
int xerr=0,yerr=0,delta_x,delta_y,distance;
int incx,incy,uRow,uCol;
delta_x=x2-x1; //¼ÆËã×ø±êÔöÁ¿
delta_y=y2-y1;
uRow=x1;
uCol=y1;
if(delta_x>0)incx=1; //ÉèÖÃµ¥²½·½Ïò
else if(delta_x==0)incx=0;//´¹Ö±Ïß
else {incx=-1;delta_x=-delta_x;}
if(delta_y>0)incy=1;
else if(delta_y==0)incy=0;//Ë®Æ½Ïß
else{incy=-1;delta_y=-delta_y;}
if( delta_x>delta_y)distance=delta_x; //Ñ¡È¡»ù±¾ÔöÁ¿×ø±êÖá
else distance=delta_y;
for(t=0;t<=distance+1;t++ )//»ÏßÊä³ö
{
LCD_DrawPoint(uRow,uCol);//»µã
xerr+=delta_x ;
yerr+=delta_y ;
if(xerr>distance)
{
xerr-=distance;
uRow+=incx;
}
if(yerr>distance)
{
yerr-=distance;
uCol+=incy;
}
}
}
//»¾ØÐÎ
void LCD_DrawRectangle(u16 x1, u16 y1, u16 x2, u16 y2)
{
LCD_DrawLine(x1,y1,x2,y1);
LCD_DrawLine(x1,y1,x1,y2);
LCD_DrawLine(x1,y2,x2,y2);
LCD_DrawLine(x2,y1,x2,y2);
}
//ÔÚÖ¸¶¨Î»ÖÃ»Ò»¸öÖ¸¶¨´óÐ¡µÄÔ²
//(x,y):ÖÐÐÄµã
//r :°ë¾¶
void Draw_Circle(u16 x0,u16 y0,u8 r)
{
int a,b;
int di;
a=0;b=r;
di=3-(r<<1); //ÅÐ¶ÏÏÂ¸öµãÎ»ÖÃµÄ±êÖ¾
while(a<=b)
{
LCD_DrawPoint(x0-b,y0-a); //3
LCD_DrawPoint(x0+b,y0-a); //0
LCD_DrawPoint(x0-a,y0+b); //1
LCD_DrawPoint(x0-b,y0-a); //7
LCD_DrawPoint(x0-a,y0-b); //2
LCD_DrawPoint(x0+b,y0+a); //4
LCD_DrawPoint(x0+a,y0-b); //5
LCD_DrawPoint(x0+a,y0+b); //6
LCD_DrawPoint(x0-b,y0+a);
a++;
//Ê¹ÓÃBresenhamËã·¨»Ô²
if(di<0)di +=4*a+6;
else
{
di+=10+4*(a-b);
b--;
}
LCD_DrawPoint(x0+a,y0+b);
}
}
//ÔÚÖ¸¶¨Î»ÖÃÏÔÊ¾Ò»¸ö×Ö·û
//num:ÒªÏÔÊ¾µÄ×Ö·û:" "--->"~"
//mode:µþ¼Ó·½Ê½(1)»¹ÊÇ·Çµþ¼Ó·½Ê½(0)
//ÔÚÖ¸¶¨Î»ÖÃÏÔÊ¾Ò»¸ö×Ö·û
//num:ÒªÏÔÊ¾µÄ×Ö·û:" "--->"~"
//mode:µþ¼Ó·½Ê½(1)»¹ÊÇ·Çµþ¼Ó·½Ê½(0)
void LCD_ShowChar(u16 x,u16 y,u8 num,u8 mode)
{
u8 temp;
u8 pos,t;
u16 x0=x;
u16 colortemp=POINT_COLOR;
if(x>LCD_W-16||y>LCD_H-16)return;
//ÉèÖÃ´°¿Ú
num=num-' ';//µÃµ½Æ«ÒÆºóµÄÖµ
Address_set(x,y,x+8-1,y+16-1); //ÉèÖÃ¹â±êÎ»ÖÃ
if(!mode) //·Çµþ¼Ó·½Ê½
{
for(pos=0;pos<16;pos++)
{
temp=asc2_1608[(u16)num*16+pos]; //µ÷ÓÃ1608×ÖÌå
for(t=0;t<8;t++)
{
if(temp&0x01)POINT_COLOR=colortemp;
else POINT_COLOR=BACK_COLOR;
LCD_WR_DATA(POINT_COLOR);
temp>>=1;
x++;
}
x=x0;
y++;
}
}else//µþ¼Ó·½Ê½
{
for(pos=0;pos<16;pos++)
{
temp=asc2_1608[(u16)num*16+pos]; //µ÷ÓÃ1608×ÖÌå
for(t=0;t<8;t++)
{
if(temp&0x01)LCD_DrawPoint(x+t,y+pos);//»Ò»¸öµã
temp>>=1;
}
}
}
POINT_COLOR=colortemp;
}
//m^nº¯Êý
u32 mypow(u8 m,u8 n)
{
u32 result=1;
while(n--)result*=m;
return result;
}
//ÏÔÊ¾2¸öÊý×Ö
//x,y :Æðµã×ø±ê
//len :Êý×ÖµÄÎ»Êý
//color:ÑÕÉ«
//num:ÊýÖµ(0~4294967295);
void LCD_ShowNum(u16 x,u16 y,u32 num,u8 len)
{
u8 t,temp;
u8 enshow=0;
num=(u16)num;
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+8*t,y,' ',0);
continue;
}else enshow=1;
}
LCD_ShowChar(x+8*t,y,temp+48,0);
}
}
//ÏÔÊ¾2¸öÊý×Ö
//x,y:Æðµã×ø±ê
//num:ÊýÖµ(0~99);
void LCD_Show2Num(u16 x,u16 y,u16 num,u8 len)
{
u8 t,temp;
for(t=0;t<len;t++)
{
temp=(num/mypow(10,len-t-1))%10;
LCD_ShowChar(x+8*t,y,temp+'0',0);
}
}
//ÏÔÊ¾×Ö·û´®
//x,y:Æðµã×ø±ê
//*p:×Ö·û´®ÆðÊ¼µØÖ·
//ÓÃ16×ÖÌå
void LCD_ShowString(u16 x,u16 y,const u8 *p)
{
while(*p!='\0')
{
if(x>LCD_W-16){x=0;y+=16;}
if(y>LCD_H-16){y=x=0;}
LCD_ShowChar(x,y,*p,0);
x+=8;
p++;
}
}