为了配3寸的TFT屏，用了OPPO Luna的LPC 2103+ SSD1928，里面用FGPIO跟1928通讯，但它的程序不用那些FIOMASK。 其实那些东西有什麽用途呢？
#ifdef LPC210X_FAST_GPIO
/* Fast General Purpose Input/Output (GPIO) */
#define FIODIR (*((volatile unsigned long *) 0x3FFFC000))
#define FIOMASK (*((volatile unsigned long *) 0x3FFFC010))
#define FIOPIN (*((volatile unsigned long *) 0x3FFFC014))
#define FIOSET (*((volatile unsigned long *) 0x3FFFC018))
#define FIOCLR (*((volatile unsigned long *) 0x3FFFC01C))
#define SCS (*((volatile unsigned long *) 0xE01FC1A0))
#define FIO0PIN (*((volatile unsigned char *) 0x3FFFC014))
#define FIO1PIN (*((volatile unsigned char *) 0x3FFFC015))
#define FIO0SET (*((volatile unsigned long *) 0x3FFFC018))
#define FIO1SET (*((volatile unsigned long *) 0x3FFFC019))
#endif
void PortInit()
{
SCS = 1;//设置快速FGPIO模式 (0:GPIO; 1:fast GPIO)
FIOPIN = 0x00000000;
FIODIR|= 0xFFFFFFFF;
PINSEL0 = 0x00000000;
}
#define indirect_cs_up() (FIOSET)=(1<<PORTD_CS);
#define indirect_cs_down() (FIOCLR)=(1<<PORTD_CS);
void indirect_IO_WriteData(UINT16 data)//write to GPIO
{
FIODIR=0xFFFFFFFF;//Bit15-0 for write
(FIOCLR)=(0x0000FFFF);
(FIOSET)=(data<<PORTD_DATA);
}
UINT16 indirect_IO_ReadData()//read from GPIO
{
FIODIR=0xFFFF0000;//Bit15-0 for read
return (FIOPIN)&0xFFFF;
} |
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