// 2015.2.18 Voltage Monitor
// ===> LCD ACM1602N1-FLW-FBW M01 Akizuki
// Receive from V_Moni by UART of TWE-Lite  M.T
#include<16F1827.h>
#include<math.h>
#fuses INTRC_IO,NOWDT,NOPROTECT,NOMCLR,BROWNOUT	//
#use delay(clock= 16000000)
//#use delay  (clock=10000000)
#use i2c(MASTER,SDA=PIN_B1,SCL=PIN_B4,FAST,NOFORCE_SW)
#use RS232(PARITY=N, BAUD=38400,XMIT=PIN_B5, RCV=PIN_B2)

// ACM1602
#define LCD_ADD             0xA0    // ACM1602 Slave Address

void LCD_cmd(unsigned char cmd);
void LCD_Clear();
void LCD_Setline(unsigned char line);
void LCD_init();
void LCD_data(unsigned char data);
void LCD_space(int8 n);
void LCD_Clear_line2();

#define line_1              0x80
#define line_2              0xC0
#define data_out            0x80
#define cmd_code            0x00

static int8  cnt, tglsw;
// Ring Buffer
#define MAX 300
static int16 tail, head;
static char  buff[MAX];

#int_rda
void isr_rcv()
{
    char C;    // enqueue
    //disable_interrupts(INT_RDA);
    C = (0x7f & getc());
    buff[tail++] = C;
    if(tail>=MAX){
        tail = 0;
    }
    //enable_interrupts(INT_RDA);
}

//  ==========================================
void main(){
    char C;
    char title1[17]="Rec. V Monitor";
    char title2[17]="Real_V Minimam_V";
    int8 counter;

    LCD_init();
    LCD_Setline(line_1);
    cnt = 0;
    while(cnt < 16){
        LCD_data(0x30 + cnt++);
    }
    delay_ms(300);
    LCD_Setline(line_2);
    cnt = 0;
    while(cnt < 16){
        LCD_data(0x40 + cnt++);
    }
    delay_ms(300);
    LCD_Clear();
    LCD_Setline(line_1);
// title1
    for(counter=0;counter<=16;counter++){
        LCD_data(title1[counter]);
    }
    delay_ms(500);
// title2
    LCD_Setline(line_1);
    for(counter=0;counter<=16;counter++){
        LCD_data(title2[counter]);
    }
    delay_ms(300);
    LCD_Clear_line2();
    LCD_Setline(line_2);
    tail = head  = 0;
    cnt  = tglsw = 0;
    
    enable_interrupts(INT_RDA);
    enable_interrupts(GLOBAL);
    while(1) {
        if(tglsw & 0x01){
            output_high(PIN_B3);
        }
        else{
            output_low(PIN_B3);
        }
    // dequeue
         if(tail != head){
            C = buff[head++];
            if(head >= MAX){
                head = 0;
            }
    // 0x3b==>';'  End of Line
            if( (cnt>=16)||(C==0x3b)||(C==0x0d)||(C==0x0a) ){
                LCD_data(' ');LCD_data(' ');LCD_data(' ');
                LCD_Setline(line_2);
                tglsw++ ;
                cnt = 2;
            }
            else{
                if( (0x20<=C)&&(C<=0x7a)){
                    LCD_data(C);
                    cnt++;
                }
            }
        }
    }
}

// ACM1602NI-FLW-FBW-M01
void LCD_Clear_line2(){
    int8 n;
    n = 0;
    LCD_Setline(line_2);
    while(n++ < 16){
        LCD_data(0x20);
    }
}

void LCD_cmd(unsigned char cmd){
    int16 u_t=10;
    i2c_start();        delay_ms(1);
    i2c_write(LCD_ADD); delay_us(u_t);     // Slave Address
    i2c_write(cmd_code);delay_us(u_t);     // Command Mode
    i2c_write(cmd);     delay_us(u_t);     // Send Command
    i2c_stop();         delay_ms(1);
}
void LCD_Clear(){
    LCD_cmd(0x01);
    delay_ms(3);
}
void LCD_Setline(unsigned char line) {
    LCD_cmd(line);
}
void LCD_init(){
    delay_ms(40);
    LCD_cmd(0x01);     //
    delay_ms(1);
    LCD_cmd(0x38);     //
    delay_ms(1);
    LCD_cmd(0x0C);     //
    delay_ms(1);
}
void LCD_data(unsigned char data){
    int16 u_t=10;

    i2c_start();        delay_ms(1);
    i2c_write(LCD_ADD); delay_us(u_t);     // Slave Address
    i2c_write(data_out);delay_us(u_t);     // Data Out Code
    i2c_write(data);    delay_us(u_t);     // Send Command
    i2c_stop();         delay_ms(1);
}
void LCD_space(int8 n){
    int8 cnt;
    cnt = 0;
    while(cnt++ < n){
        LCD_data(' ');
    }
}