SQL Performance Tuning is a handbook of practical solutions for busy database professionals charged with managing an organization s critically importa...
计算机要想访问HD61 202。必须 首先读取状态字寄存器的内容。主要是 要判别状态宇中的 Busy”标志；在 “Busy”标志表示为O时。计算机方可 访问HD61202。...
S6B0724液晶显示驱动程序 void LCD_BUSY(void) void write_LCD_data(uchar lcd_data) void write_LCD_command(uchar command) void clear_lcd(void) void LCDCl...
//液晶显示初始化ini_OCMJ(void)和驱动程序sub_lcd(uchar in)。 //占用I/O口为 #define LCD_OUT P4 //sbit LCD_BUSY=P3^6 //sbit LCD_REQ=P3^7...
51与GPS的通信 CS0接CS8255 CS1接CS50 8255PA0-PA7接DB0-DB7 8255PC0接REQ 8255PC7接BUSY...
