윤덕용 교수님의 한글 GLCD 라이브러리 - 하위 제어포트 살리기

윤교수님 한글 GLCD 라이브러리 수정중인데
지난 포스팅까지 일단 제어는 성공
그런데 포트에서 제어핀으로 사용하지 않은 잔여핀도 제어가 변하는 현상이
일단 핀이 아까운 경우가 발생하므로 다른 한글라이브러리 처럼
제어핀 콘트롤 독립화 -영향 제거

아직 어딘가 문제가 있는듯
..
GLCD 제어 기본원리는 =  http://blog.naver.com/freehuds?Redirect=Log&logNo=100074004932 

수정할 곳
다른 곳에서 얻어온 소스 주입

 

 

 

* LCD_DATABUS(0x2000) : D0-D7 = DB0-DB7 (7-14, data bus)        */
/* LCD_CONTROL(0x2100) :    D3 = R/-W    (5, read/write)        */
/*                          D4 = D/-I    (4, data/instruction)        */
/*                          D5 = E       (6, enable)        */
/*                          D6 = CS1     (15, chip select 1)        */
/*                          D7 = CS2     (16, chip select 2)        */
#define LCD_DATABUS PORTD  // LCD/GLCD data
#define LCD_DATA_PIN PIND        // Added to read data
#define LCD_DATA_DIR DDRD
#define LCD_CONTROL PORTF  // LCD/GLCD control signal
#define LCD_CTRL_DIR DDRF
#define LCD_CTRL_PIN PINF        // Added to read data
#define RW 3
#define RS 4
#define G_E 5
#define G_CS1 6
#define G_CS2 7
#define RS_DATA LCD_CONTROL|=_BV(RS)
#define RS_CMD LCD_CONTROL&=~_BV(RS)
#define RW_READ LCD_CONTROL|=_BV(RW)
#define RW_WRITE         LCD_CONTROL&=~_BV(RW)
#define E_ON LCD_CONTROL|=_BV(G_E)
#define E_OFF LCD_CONTROL&=~_BV(G_E)
#define CS1_ON LCD_CONTROL|=_BV(G_CS1)
#define CS1_OFF LCD_CONTROL&=~_BV(G_CS1)
#define CS2_ON LCD_CONTROL|=_BV(G_CS2)
#define CS2_OFF LCD_CONTROL&=~_BV(G_CS2) 
 
기본 GLCD 제어 루틴 수정 - 원래 포트 데이터 건드리지 않게 수정
// ----------------------------------------------------------------------------
void GLCD_command(uint8_t signal,uint8_t command)       /* write a command */
{ 

//LCD_CONTROL = (signal & 0xC0); // D/-I = 0
if(signal == 0x40){
CS1_ON; CS2_OFF;
}else if(signal == 0x80){
CS1_OFF; CS2_ON;
}else{
CS1_ON; CS2_ON;
}
RS_CMD;
RW_WRITE;
asm volatile(" PUSH  R0 ");                 // delay for 500 ns
asm volatile(" POP   R0 ");
asm volatile(" PUSH  R0 ");
asm volatile(" POP   R0 ");
LCD_DATABUS = command;                      // write command
//LCD_CONTROL |= (signal & 0xC0)|0x20; // E = 1
E_ON;
asm volatile(" PUSH  R0 ");                 // delay for 500 ns
asm volatile(" POP   R0 ");
asm volatile(" PUSH  R0 ");
asm volatile(" POP   R0 ");
//LCD_CONTROL = signal & 0xC0;              // E = 0
E_OFF;
asm volatile(" NOP      ");
//LCD_CONTROL = 0x00; // clear all control signals
Delay_us(10);                               // wait for GLCD busy
}
// ----------------------------------------------------------------------------
void GLCD_data(uint8_t signal,uint8_t character)        /* write a data */
{ 
//LCD_CONTROL = (signal & 0xC0)|0x10; // D/-I = 1
if(signal == 0x40){
CS1_ON; CS2_OFF;
}else{
CS1_OFF; CS2_ON;
}
RS_DATA;
RW_WRITE;
asm volatile(" PUSH  R0 ");                 // delay for 500 ns
asm volatile(" POP   R0 ");
asm volatile(" PUSH  R0 ");
asm volatile(" POP   R0 ");
LCD_DATABUS = character;                    // write data
//LCD_CONTROL = (signal & 0xC0)|0x30; // E = 1
E_ON;
asm volatile(" PUSH  R0 ");                 // delay for 500 ns
asm volatile(" POP   R0 ");
asm volatile(" PUSH  R0 ");
asm volatile(" POP   R0 ");
//LCD_CONTROL = (signal & 0xC0)|0x10;       // E = 0
E_OFF;
asm volatile(" NOP      ");
//LCD_CONTROL = 0x00; // clear all control signals
Delay_us(10);                               // wait GLCD busy
}
// ----------------------------------------------------------------------------
unsigned char GLCD_data_RD(uint8_t cols) // Read a data
{ 
unsigned char data=0, signal;
if(cols < 64) // if y <= 7, CS1
signal = 0x40;
else // if y >= 8, CS2
signal = 0x80;
//LCD_CONTROL = (signal & 0xC0)|0x10; // RS = 1 => PD4
if(signal == 0x40){
CS1_ON; CS2_OFF;
}else{
CS1_OFF; CS2_ON;
}
RS_DATA;
asm volatile(" PUSH  R0 ");                 // delay for 500 ns
asm volatile(" POP   R0 ");
asm volatile(" PUSH  R0 ");
asm volatile(" POP   R0 ");
//LCD_CONTROL |= 0x08; // Set Read; RW = PD3
RW_READ;
LCD_DATA_DIR = 0x00;
LCD_DATABUS = 0x00;
//LCD_CONTROL |= (signal & 0xC0)|0x30; // E = 1
E_ON;
asm volatile(" PUSH  R0 ");                 // delay for 500 ns
asm volatile(" POP   R0 ");
asm volatile(" PUSH  R0 ");
asm volatile(" POP   R0 ");
data = LCD_DATA_PIN;
//LCD_CONTROL = (signal & 0xC0)|0x10;       // E = 0
E_OFF;
asm volatile(" NOP      ");
//LCD_CONTROL &= ~0x08; // Set Write ; RW = PD3
RW_WRITE;
LCD_DATA_DIR = 0xFF;
LCD_DATABUS = 0x00;
//LCD_CONTROL = 0x00; // clear all control signals
Delay_us(10);                               // wait GLCD busy
return data;
}