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5楼
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发表于 2011-4-22 09:27:57
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我卸下32K晶振用内部振荡器还是没有输出,所有的驱动端口都为高电平,请白沙以及高手指导呀,驱动程序如下所示:
#define BIAS 0x52 //4COM,1/2bias 1000 0101 0010
#define RCosc 0x30 //内部RC振荡器(上电默认)1000 0011 0000
#define SYSEN 0x02 //系统振荡器开 1000 0000 0010
#define WDTen 0x02 //看门狗输出有效 1000 0000 1110
#define TMRen 0x0C //时基输出有效 1000 0000 1100
#define TMRclr 0x18 //时基输出清零 1000 0001 1000
#define LCDOFF 0x04 //关闭LCD显示
#define LCDON 0x06 //打开LCD 偏压发生器1000 0000 0 11 0
#define XTAL 0x28 //外部32768振荡器 1000 0010 1000
#define IRQen 0x10 //外部时基打开 1001 0001 0000
#define WDT1hz 0x40 //外部时基打开 1001 0100 0000
#define CS_LOW GPIOPinWrite(GPIO_PORTC_BASE,GPIO_PIN_4,0x00)
#define CS_HIGH GPIOPinWrite(GPIO_PORTC_BASE,GPIO_PIN_4,0xFF)
#define RD_LOW GPIOPinWrite(GPIO_PORTC_BASE,GPIO_PIN_5,0x00)
#define RD_HIGH GPIOPinWrite(GPIO_PORTC_BASE,GPIO_PIN_5,0xFF)
#define WR_LOW GPIOPinWrite(GPIO_PORTC_BASE,GPIO_PIN_6,0x00)
#define WR_HIGH GPIOPinWrite(GPIO_PORTC_BASE,GPIO_PIN_6,0xFF)
#define DATA_LOW GPIOPinWrite(GPIO_PORTC_BASE,GPIO_PIN_7,0x00)
#define DATA_HIGH GPIOPinWrite(GPIO_PORTC_BASE,GPIO_PIN_7,0xFF)
void init_LCD_IO()
{
GPIOPinTypeGPIOOutput(GPIO_PORTC_BASE,GPIO_PIN_4|GPIO_PIN_5|GPIO_PIN_6|GPIO_PIN_7);
GPIOPadConfigSet(GPIO_PORTC_BASE, GPIO_PIN_4, GPIO_STRENGTH_8MA, GPIO_PIN_TYPE_STD_WPU);
GPIOPadConfigSet(GPIO_PORTC_BASE, GPIO_PIN_5, GPIO_STRENGTH_8MA, GPIO_PIN_TYPE_STD_WPU);
GPIOPadConfigSet(GPIO_PORTC_BASE, GPIO_PIN_6, GPIO_STRENGTH_8MA, GPIO_PIN_TYPE_STD_WPU);
GPIOPadConfigSet(GPIO_PORTC_BASE, GPIO_PIN_7, GPIO_STRENGTH_8MA, GPIO_PIN_TYPE_STD_WPU);
}
void lcd_init(void)
{
SendCmd(BIAS); //1/2bias,4comm
SendCmd(RCosc);
SendCmd(TMRclr);
SendCmd(TMRen);
SendCmd(TMRclr);
SendCmd1(WDT1hz);
SendCmd1(IRQen);
SendCmd(SYSEN); //启动内部振荡器
SendCmd(LCDON); //打开显示
}
void SendBit_1621(unsigned char data,unsigned char cnt) //data 的高cnt 位写入HT1621,高位在前
{
unsigned char i;
for(i =0; i <cnt; i ++)
{
if((data&0x80)==0) DATA_LOW;
else DATA_HIGH;
WR_LOW;
for(unsigned long i=0;i<500;i++)
{
asm("nop");
}
WR_HIGH;
for(unsigned long i=0;i<500;i++)
{
asm("nop");
}
data<<=1;
}
}
void SendDataBit_1621(unsigned char data,unsigned char cnt) //data 的低cnt 位写入HT1621,低位在前
{
unsigned char i;
for(i =0; i <cnt; i ++)
{
if((data&0x01)==0) DATA_LOW;
else WR_HIGH;
WR_LOW;
for(unsigned long i=0;i<500;i++)
{
asm("nop");
}
WR_HIGH;
for(unsigned long i=0;i<500;i++)
{
asm("nop");
}
data>>=1;
}
}
void SendCmd(unsigned char command)
{
CS_LOW;
SendBit_1621(0x80,4); //写入标志码"100"
SendBit_1621(command,8); //写入8 位数据,其中前8 位为command 命令
CS_HIGH;
}
void SendCmd1(unsigned char command)
{
CS_LOW;
SendBit_1621(0x90,4); //写入标志码"100"
SendBit_1621(command,8); //写入8 位数据,其中前8 位为command 命令
CS_HIGH;
}
void Write_1621(unsigned char addr,unsigned char data)
{
CS_LOW;
SendBit_1621(0xa0,3); //写入标志码"101"
SendBit_1621(addr<<2,6); //写入6 位addr
SendDataBit_1621(data,4); //写入data 的低4 位
CS_HIGH;
}
void WriteAll_1621(unsigned char addr,unsigned char *p,unsigned char cnt)
{
unsigned char i;
CS_LOW;
SendBit_1621(0xa0,3); //写入标志码"101"
SendBit_1621(addr<<2,6); //写入6 位addr
for(i =0; i <cnt; i ++,p++) //连续写入数据
{
SendDataBit_1621(*p,8);
}
CS_HIGH;
} |
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