I am trying to modify on the menu code to be able to use a keypad shield and arduino for scrolling between lines. after uploading and trying the code the following has happened: 1- I can not scroll more than 2 lines. 2- If I press D, I can scroll to another 2 lines. What is the problem in this code?
include "String.h"
include"AccelStepper.h"
include "Keypad.h"
include "U8glib.h"
U8GLIB_ST7920_128X64_1X u8g(12, 11, 10, 13);
//Keypad setup
const byte ROWS = 4;
const byte COLS = 4;
char hexaKeys [ROWS][COLS] = {
{'1', '2', '3', 'A'}, {'4', '5', '6', 'B'}, {'7', '8', '9', 'C'}, {'*', '0', '#', 'D'} };
byte rowPins [ROWS] = {5, 4, 3, 2};
byte colPins [COLS] = {9, 8, 7, 6};
Keypad customKeypad = Keypad (makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS);
define KEY_NONE 0
define KEY_PREV 1
define KEY_NEXT 2
define KEY_SELECT 3
define KEY_BACK 4
uint8_t keycode1 = KEY_NONE;
uint8_t keycode2 = KEY_NONE;
uint8_t keycode = KEY_NONE;
void keymode(void){
keycode2 = keycode1;
char keypressed = customKeypad.getKey();
if (keypressed != NO_KEY){
switch (keypressed){
case 'A':
keycode1 = KEY_PREV;
Serial.println("A");
break;
case'B':
keycode1 = KEY_NEXT;
Serial.println("B");
break;
case 'C':
keycode1 = KEY_SELECT;
Serial.println("C");
break;
case 'D':
keycode1 = KEY_BACK;
Serial.println("D");
break;
}
if (keypressed != 'A' && keypressed != 'B' && keypressed !='C' && keypressed != 'D')
keycode1 = KEY_NONE;
}
if (keycode2 == keycode1)
keycode = keycode1;
else
keycode = KEY_NONE;
}
define MENU_ITEMS 4
const char *menu_strings[MENU_ITEMS] = {"Start", "Hello", "Let's Go", "End"};
uint8_t menu_current = 0;
uint8_t menu_redraw = 0;
uint8_t Last_key_code = KEY_NONE;
void drawmenu(void){
uint8_t i, h;
u8g_uint_t w, d;
u8g.setFont(u8g_font_6x13);
u8g.setFontRefHeightText();
u8g.setFontPosTop();
h = u8g.getFontAscent()-u8g.getFontDescent();
w = u8g.getWidth();
for( i = 0; i < MENU_ITEMS; i++ ) {
d = (w-u8g.getStrWidth(menu_strings[i]))/2;
u8g.setDefaultForegroundColor();
if ( i == menu_current ) {
u8g.drawBox(0, ih+1, w, h);
u8g.setDefaultBackgroundColor();
} u8g.drawStr(d, ih, menu_strings[i]);
} }
void updatemenu(void){
if (keycode != KEY_NONE && Last_key_code == keycode) {
return; } Last_key_code = keycode;
switch(keycode){
case KEY_NEXT:
menu_current ++;
if (menu_current >= MENU_ITEMS)
menu_current =0;
menu_redraw = 1;
break;
case KEY_PREV:
if (menu_current ==0)
menu_current = MENU_ITEMS;
menu_current --;
menu_redraw = 1;
break;
} }
void setup (){
Serial.begin(9600);
menu_redraw = 1;
}
void loop (){
keymode();
if (menu_redraw !=0) {
u8g.firstPage();
do{
drawmenu();
}while(u8g.nextPage());
menu_redraw = 0;
} updatemenu();
}
