单片机中不带字库LCD液晶屏如何显示少量汉字,一般显示汉字的方法有1.使用带字库的LCD屏,2.通过SD卡或者外挂spi flash存中文字库,3.直接将需要的汉字取模存入mcu的flash中。
第一种方式最方便,带字库的液晶屏价格稍贵,第二种方式电路复杂价格也不便宜,第三种方法可以存储少量必要的汉字,经济实用。将汉字字模数据存储到大数组中,通过偏移值来取出需要的汉字显示。
typedef struct _GB16 // 汉字字模数据结构
{
signed char Index[2]; // 汉字内码索引
char Msk[32]; // 点阵码数据
}GB16_Typedef;
const GB16_Typedef GB16x16[] = //创建字库,阴码,顺向,逐行式取模
{
{"天",0x00,0x00,0x3F,0xF8,0x01,0x00,0x01,0x00,
0x01,0x00,0x01,0x00,0xFF,0xFE,0x01,0x00,
0x02,0x80,0x02,0x80,0x04,0x40,0x04,0x40,
0x08,0x20,0x10,0x10,0x20,0x08,0xC0,0x06},
{"地",0x10,0x20,0x10,0x20,0x10,0x20,0x11,0x20,
0x11,0x2C,0xFD,0x34,0x11,0x64,0x13,0xA4,
0x11,0x24,0x11,0x34,0x11,0x28,0x1D,0x22,
0xE1,0x22,0x41,0x02,0x00,0xFE,0x00,0x00},
{"不",0x00,0x00,0x7F,0xFC,0x00,0x80,0x00,0x80,
0x01,0x00,0x01,0x00,0x03,0x40,0x05,0x20,
0x09,0x10,0x11,0x08,0x21,0x04,0x41,0x04,
0x81,0x00,0x01,0x00,0x01,0x00,0x01,0x00},
{"仁",0x08,0x00,0x08,0x00,0x08,0x00,0x13,0xFC,
0x10,0x00,0x30,0x00,0x30,0x00,0x50,0x00,
0x90,0x00,0x10,0x00,0x10,0x00,0x10,0x00,
0x17,0xFE,0x10,0x00,0x10,0x00,0x10,0x00},
}
/*
其中定义的汉字结构体元素中Index[2]存放汉字,而Msk用于存放点阵码。
具体程序如下:
*/
void show_chinese(uint16_t x, uint16_t y, uint8_t *pstr, uint16_t pointColor, uint16_t backColor)
{
uint8_t bit_cnt, byte_cnt, wordNum;
uint16_t color, word_index;
const GB16_Typedef* p_tab;
p_tab = GB16x16;
wordNum = sizeof(GB24x24) / sizeof(GB24_Typedef);//汉字的个数
while(*pstr != '\0')
{
for(word_index=0; word_index<wordNum; word_index++)
{
if(*pstr==p_tab[word_index].Index[0] && *(pstr+1)==p_tab[word_index].Index[1])
{
tft_set_window(x, y, x+15, y+15);//设置要操作的窗口范围
for(byte_cnt=0; byte_cnt<32; byte_cnt++)
{
uint8_t color = p_tab[word_index].Msk[byte_cnt];
for (bit_cnt=0; bit_cnt<8; bit_cnt++)
{
if((color&0x80) == 0x80)
{
tft_wrdat(pointColor);//LCD写数据
}
else
{
tft_wrdat(backColor);//LCD写数据
}
color = color<<1;
}
}
pstr+=2;
x += 16;
if(x > 225)
{
x = 0;
y += 16;
}
}
}
}
}
int main()
{
TFT_Init(); //TFT彩屏初始化
LED_Init(); //LED初始化
tft_clear_screen(BLACK); //清屏
show_chinese(6, 20, "天地不仁", MAGENTA, YELLOW);//YELLOW
while(1)
{
KeyTask();//按键扫描
}
}
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