atmega128实现oled画点功能程序编译错误the expression must be a modifiable lvalue

ID:371250 · 发表于 2019-7-10 15:52

Error: C:\Users\zxc60\Desktop\avr资料\demo2.0\oled.c(116): the expression must be a modifiable lvalue
Error: C:\Users\zxc60\Desktop\avr资料\demo2.0\oled.c(118): no matching if

这可咋整啊
！！！！
救救孩子！！！！！！
本来想吧我们在128内部定义了一个块GRAM：u8 OLED_GRAM[128][8];此部分GRAM对应OLED模块上的GRAM。在操作的时候，我们只要修改STM32内部的GRAM就可以了，然后通过OLED_Refresh_Gram函数把GRAM一次刷新到OLED 的GRAM上。可是128RAM太小了，老师提醒可以放在FLASH里，。。。可是FLASH要初始化u8 OLED_GRAM[128][8];得怎么写呜呜呜

单片机源程序如下:

#include "oled.h"
//#include "stdlib.h"
#include "oledfont.h"
#include "delay.h"
//OLED的显存
//存放格式如下.
//[0]0 1 2 3 ... 127
//[1]0 1 2 3 ... 127
//[2]0 1 2 3 ... 127
//[3]0 1 2 3 ... 127
//[4]0 1 2 3 ... 127
//[5]0 1 2 3 ... 127
//[6]0 1 2 3 ... 127
//[7]0 1 2 3 ... 127
//void delay_ms(unsigned int ms)
//{
// unsigned int a;
// while(ms)
// {
// a=1800;
// while(a--);
// ms--;
// }
// return;
//}
#if OLED_MODE==1
//向SSD1106写入一个字节。
//dat:要写入的数据/命令
//cmd:数据/命令标志 0,表示命令;1,表示数据;
void OLED_WR_Byte(u8 dat,u8 cmd)
{
DATAOUT(dat);
if(cmd)
OLED_DC_Set();
else
OLED_DC_Clr();
OLED_CS_Clr();
OLED_WR_Clr();
OLED_WR_Set();
OLED_CS_Set();
OLED_DC_Set();
}
#else
//向SSD1306写入一个字节。
//dat:要写入的数据/命令
//cmd:数据/命令标志 0,表示命令;1,表示数据;
void OLED_WR_Byte(u8 dat,u8 cmd)
{
u8 i;
if(cmd)
{
PORTG&=0xf7;PORTG|=0x08;//OLED_DC_Set();
}
else
PORTG&=0xf7;//OLED_DC_Clr();
PORTG&=0xef;//OLED_CS_Clr();
for(i=0;i<8;i++)
{
PORTG&=0xfe;//OLED_SCLK_Clr();
if(dat&0x80)
{
PORTG&=0xfd;PORTG|=0x02;//OLED_SDIN_Set();
}
else
PORTG&=0xfd;//OLED_SDIN_Clr();
PORTG&=0xfe;PORTG|=0x01;//OLED_SCLK_Set();
dat<<=1;
}
PORTG&=0xef;PORTG|=0x10;//OLED_CS_Set();
PORTG&=0xf7;PORTG|=0x08;//OLED_DC_Set();
}
#endif
flash u8 OLED_GRAM[128][8]={0x00};
void OLED_Refresh_Gram(void)
{
u8 i,n;
for(i=0;i<8;i++)
{
OLED_WR_Byte (0xb0+i,OLED_CMD); //设置页地址（0~7）
OLED_WR_Byte (0x00,OLED_CMD); //设置显示位置—列低地址
OLED_WR_Byte (0x10,OLED_CMD); //设置显示位置—列高地址
for(n=0;n<128;n++)OLED_WR_Byte(OLED_GRAM[n][i],OLED_DATA);
}
}
void OLED_DrawPoint(u8 x,u8 y,u8 t)
{
u8 pos,bx,temp=0;
if(x>127||y>63)return;//超出范围了.
pos=7-y/8;
bx=y%8;
temp=1<<(7-bx);
if(t)OLED_GRAM[x][pos]|=temp;
else OLED_GRAM[x][pos]&=~temp;
}
//确定点亮显示屏的起始位置
void OLED_Set_Pos(unsigned char x, unsigned char y)
{
OLED_WR_Byte(0xb0+y,OLED_CMD); //设置页地址（0~7）
OLED_WR_Byte(((x&0xf0)>>4)|0x10,OLED_CMD);
OLED_WR_Byte((x&0x0f)|0x01,OLED_CMD);
}
//开启OLED显示
//void OLED_Display_On(void)
//{
// OLED_WR_Byte(0X8D,OLED_CMD); //SET DCDC命令
// OLED_WR_Byte(0X14,OLED_CMD); //DCDC ON
// OLED_WR_Byte(0XAF,OLED_CMD); //DISPLAY ON
//}
////关闭OLED显示
//void OLED_Display_Off(void)
//{
// OLED_WR_Byte(0X8D,OLED_CMD); //SET DCDC命令
// OLED_WR_Byte(0X10,OLED_CMD); //DCDC OFF
// OLED_WR_Byte(0XAE,OLED_CMD); //DISPLAY OFF
//}
//清屏函数,清完屏,整个屏幕是黑色的!和没点亮一样!!!
void OLED_Clear(void)
{
u8 i,n;
for(i=0;i<8;i++)
{
OLED_WR_Byte (0xb0+i,OLED_CMD); //设置页地址（0~7）
OLED_WR_Byte (0x00,OLED_CMD); //设置显示位置—列低地址
OLED_WR_Byte (0x10,OLED_CMD); //设置显示位置—列高地址
for(n=0;n<128;n++)OLED_WR_Byte(0,OLED_DATA);
} //更新显示
}
//void OLED_DrawPoint(u8 x,u8 y,u8 t)
//
//{
//
// u8 pos,bx,temp=0;
//
// if(x>63||y>63)return;//超出范围了.
//
// pos=7-y/8;
//
// bx=y%8;
//
// temp=1<<(7-bx);
//
// if(t)OLED_GRAM[x][pos]|=temp;
//
// else OLED_GRAM[x][pos]&=~temp;
//
//}
//在指定位置显示一个字符,包括部分字符
//x:0~127
//y:0~63
//mode:0,反白显示;1,正常显示
//size:选择字体 16/12
void OLED_ShowChar(u8 x,u8 y,u8 chr)
{
unsigned char c=0,i=0;
c=chr-' ';//得到偏移后的值
if(x>Max_Column-1){x=0;y=y+2;}
if(SIZE ==16)
{
OLED_Set_Pos(x,y);
for(i=0;i<8;i++)
OLED_WR_Byte(F8X16[c*16+i],OLED_DATA);
OLED_Set_Pos(x,y+1);
for(i=0;i<8;i++)
OLED_WR_Byte(F8X16[c*16+i+8],OLED_DATA);
}
else {
OLED_Set_Pos(x,y+1);
for(i=0;i<6;i++)
OLED_WR_Byte(F6x8[c][i],OLED_DATA);
}
}
//m^n函数
//u32 oled_pow(u8 m,u8 n)
//{
// u32 result=1;
// while(n--)result*=m;
// return result;
//}
//显示2个数字
//x,y :起点坐标
//len :数字的位数
//size:字体大小
//mode:模式 0,填充模式;1,叠加模式
//num:数值(0~4294967295);
//void OLED_ShowNum(u8 x,u8 y,u32 num,u8 len,u8 size2)
//{
// u8 t,temp;
// u8 enshow=0;
// for(t=0;t<len;t++)
// {
// temp=(num/oled_pow(10,len-t-1))%10;
// if(enshow==0&&t<(len-1))
// {
// if(temp==0)
// {
// OLED_ShowChar(x+(size2/2)*t,y,' ');
// continue;
// }else enshow=1;
//
// }
// OLED_ShowChar(x+(size2/2)*t,y,temp+'0');
// }
//}
//显示一个字符号串
void OLED_ShowString(u8 x,u8 y,u8 *chr)
{
unsigned char j=0;
OLED_Set_Pos(x,y);
while (chr[j]!='\0')
{ OLED_ShowChar(x,y,chr[j]);
x+=8;
if(x>120){x=0;y+=2;}
j++;
}
}
//显示汉字
void OLED_ShowCHinese(u8 x,u8 y,u8 no)
{
u8 t,adder=0;
OLED_Set_Pos(x,y);
for(t=0;t<16;t++)
{
OLED_WR_Byte(Hzk[2*no][t],OLED_DATA);
adder+=1;
}
OLED_Set_Pos(x,y+1);
for(t=0;t<16;t++)
{
OLED_WR_Byte(Hzk[2*no+1][t],OLED_DATA);
adder+=1;
}
}
/***********功能描述：显示显示BMP图片128×64起始点坐标(x,y),x的范围0～127，y为页的范围0～7*****************/
//void OLED_DrawBMP(unsigned char x0, unsigned char y0,unsigned char x1, unsigned char y1,unsigned char BMP[])
//{
// unsigned int j=0;
// unsigned char x,y;
//
// if(y1%8==0) y=y1/8;
// else y=y1/8+1;
// for(y=y0;y<y1;y++)
// {
// OLED_Set_Pos(x0,y);
// for(x=x0;x<x1;x++)
// {
// OLED_WR_Byte(BMP[j++],OLED_DATA);
// }
// }
//}
//初始化SSD1306
void OLED_Init(void)
{
PORTG&=0xfb;PORTG|=0x04;//OLED_RST_Set();
delay_ms(100);
PORTG&=0xfb;//OLED_RST_Clr();
delay_ms(100);
PORTG&=0xfb;PORTG|=0x04;//OLED_RST_Set();
/*
OLED_WR_Byte(0xAE,OLED_CMD);//--turn off oled panel
OLED_WR_Byte(0x00,OLED_CMD);//---set low column address
OLED_WR_Byte(0x10,OLED_CMD);//---set high column address
OLED_WR_Byte(0x40,OLED_CMD);//--set start line address Set Mapping RAM Display Start Line (0x00~0x3F)
OLED_WR_Byte(0x81,OLED_CMD);//--set contrast control register
OLED_WR_Byte(0xCF,OLED_CMD); // Set SEG Output Current Brightness
OLED_WR_Byte(0xA1,OLED_CMD);//--Set SEG/Column Mapping 0xa0左右反置 0xa1正常
OLED_WR_Byte(0xC8,OLED_CMD);//Set COM/Row Scan Direction 0xc0上下反置 0xc8正常
OLED_WR_Byte(0xA6,OLED_CMD);//--set normal display
OLED_WR_Byte(0xA8,OLED_CMD);//--set multiplex ratio(1 to 64)
OLED_WR_Byte(0x3f,OLED_CMD);//--1/64 duty
OLED_WR_Byte(0xD3,OLED_CMD);//-set display offset Shift Mapping RAM Counter (0x00~0x3F)
OLED_WR_Byte(0x00,OLED_CMD);//-not offset
OLED_WR_Byte(0xd5,OLED_CMD);//--set display clock divide ratio/oscillator frequency
OLED_WR_Byte(0x80,OLED_CMD);//--set divide ratio, Set Clock as 100 Frames/Sec
OLED_WR_Byte(0xD9,OLED_CMD);//--set pre-charge period
OLED_WR_Byte(0xF1,OLED_CMD);//Set Pre-Charge as 15 Clocks & Discharge as 1 Clock
OLED_WR_Byte(0xDA,OLED_CMD);//--set com pins hardware configuration
OLED_WR_Byte(0x12,OLED_CMD);
OLED_WR_Byte(0xDB,OLED_CMD);//--set vcomh
OLED_WR_Byte(0x40,OLED_CMD);//Set VCOM Deselect Level
OLED_WR_Byte(0x20,OLED_CMD);//-Set Page Addressing Mode (0x00/0x01/0x02)
OLED_WR_Byte(0x02,OLED_CMD);//
OLED_WR_Byte(0x8D,OLED_CMD);//--set Charge Pump enable/disable
OLED_WR_Byte(0x14,OLED_CMD);//--set(0x10) disable
OLED_WR_Byte(0xA4,OLED_CMD);// Disable Entire Display On (0xa4/0xa5)
OLED_WR_Byte(0xA6,OLED_CMD);// Disable Inverse Display On (0xa6/a7)
OLED_WR_Byte(0xAF,OLED_CMD);//--turn on oled panel
*/
OLED_WR_Byte(0xAE,OLED_CMD);//--turn off oled panel
OLED_WR_Byte(0x00,OLED_CMD);//---set low column address
OLED_WR_Byte(0x10,OLED_CMD);//---set high column address
OLED_WR_Byte(0x40,OLED_CMD);//--set start line address Set Mapping RAM Display Start Line (0x00~0x3F)
OLED_WR_Byte(0x81,OLED_CMD);//--set contrast control register
OLED_WR_Byte(0xCF,OLED_CMD); // Set SEG Output Current Brightness
OLED_WR_Byte(0xA1,OLED_CMD);//--Set SEG/Column Mapping 0xa0左右反置 0xa1正常
OLED_WR_Byte(0xC8,OLED_CMD);//Set COM/Row Scan Direction 0xc0上下反置 0xc8正常
OLED_WR_Byte(0xA6,OLED_CMD);//--set normal display
OLED_WR_Byte(0xA8,OLED_CMD);//--set multiplex ratio(1 to 64)
OLED_WR_Byte(0x3f,OLED_CMD);//--1/64 duty
OLED_WR_Byte(0xD3,OLED_CMD);//-set display offset Shift Mapping RAM Counter (0x00~0x3F)
OLED_WR_Byte(0x00,OLED_CMD);//-not offset
OLED_WR_Byte(0xd5,OLED_CMD);//--set display clock divide ratio/oscillator frequency
OLED_WR_Byte(0x80,OLED_CMD);//--set divide ratio, Set Clock as 100 Frames/Sec
OLED_WR_Byte(0xD9,OLED_CMD);//--set pre-charge period
OLED_WR_Byte(0xF1,OLED_CMD);//Set Pre-Charge as 15 Clocks & Discharge as 1 Clock
OLED_WR_Byte(0xDA,OLED_CMD);//--set com pins hardware configuration
OLED_WR_Byte(0x12,OLED_CMD);
OLED_WR_Byte(0xDB,OLED_CMD);//--set vcomh
OLED_WR_Byte(0x40,OLED_CMD);//Set VCOM Deselect Level
OLED_WR_Byte(0x20,OLED_CMD);//-Set Page Addressing Mode (0x00/0x01/0x02)
OLED_WR_Byte(0x02,OLED_CMD);//
OLED_WR_Byte(0x8D,OLED_CMD);//--set Charge Pump enable/disable
OLED_WR_Byte(0x14,OLED_CMD);//--set(0x10) disable
OLED_WR_Byte(0xA4,OLED_CMD);// Disable Entire Display On (0xa4/0xa5)
OLED_WR_Byte(0xA6,OLED_CMD);// Disable Inverse Display On (0xa6/a7)
OLED_WR_Byte(0xAF,OLED_CMD);//--turn on oled panel
OLED_WR_Byte(0xAF,OLED_CMD); /*display ON*/
OLED_Clear();
OLED_Set_Pos(0,0);
}

复制代码

ID:307782 · 发表于 2019-9-3 07:54

楼主解决了吗？？？？我的oled始终不亮小白求教

ID:307782 · 发表于 2019-9-3 08:27

楼主解决了吗？？？现在遇到同样的问题，解决了的话，还望更新一下帖子，救救我，，，，，，

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atmega128实现oled画点功能 程序编译错误the expression must be a modifiable lvalue

atmega128实现oled画点功能程序编译错误the expression must be a modifiable lvalue