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SmartResponseXE.cpp
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SmartResponseXE.cpp
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//
// SMART Response XE library
//
// LCD and keyboard routines for the SRXE handheld classroom communicator
//
// Copyright (c) 2018 BitBank Software, Inc.
// written by Larry Bank
// email: [email protected]
// Project started 8/4/2018
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
#include <Arduino.h>
#include <avr/pgmspace.h>
#include <avr/sleep.h>
#include "SmartResponseXE.h"
//#include <SPI.h>
// The power button is connected to PD2 (RX1) and signals INT2
#define POWER_BUTTON 0xd2
// Mapping of keyboard to GPIO pins
//static byte rowPins[ROWS] = {6,35,34,8,9,0};
//static byte colPins[COLS] = {4,A1,A3,2,1,25,16,19,23,22};
const uint8_t rowPins[ROWS] = {0xe6, 0xb7, 0xb6, 0xb5, 0xb4, 0xe0};
const uint8_t colPins[COLS] = {0xe4, 0xf1, 0xf3, 0xe2, 0xe1, 0xd7, 0xa0, 0xa5, 0xd5, 0xd4};
static byte bKeyMap[COLS]; // bits indicating pressed keys
static byte bOldKeyMap[COLS]; // previous map to look for pressed/released keys
/* fdufnews 01/2020
Corrected second position of the array
was previously :
static byte bColorToByte[4] = {0, 0x4a, 0x92, 0xff};
*/
static byte bColorToByte[4] = {0, 0x49, 0x92, 0xff};
static byte iCSPin, iDCPin, iResetPin;
static int iScrollOffset;
void SRXEFill(byte ucData);
static void SRXEWriteCommand(unsigned char c);
typedef enum
{
MODE_DATA = 0,
MODE_COMMAND
} DC_MODE;
#ifndef HIGH
#define HIGH 1
#define LOW 0
#define INPUT 0
#define INPUT_PULLUP 1
#define OUTPUT 2
#endif
// Chip select for the external 1Mb flash module
#define CS_FLASH 0xd3
//Keyboard
//Logical Layout (SK# are screen keys: top to bottom 1-5 on left, 6-10 on right):
// ROW1|ROW2|ROW3|ROW4|ROW5|ROW6|ROW7|ROW8|ROW9|ROW10
// COL1 1| 2| 3| 4| 5| 6| 7| 8| 9| 0
// COL2 Q| W| E| R| T| Y| U| I| O| P
// COL3 A| S| D| F| G| H| J| K| L| Bksp
// COL4 Shft| Z| X| C| V| B| N| M|Entr| Up
// COL5 Sym|Frac|Root| Exp| Spc| ,| .|Down|Left|Right
// COL6 SK1| SK2| SK3| SK4| SK5| SK6| SK7| SK8| SK9| SK10
byte OriginalKeys[] = {'1','2','3','4','5','6','7','8','9','0',
'q','w','e','r','t','y','u','i','o','p',
'a','s','d','f','g','h','j','k','l',8,
0 ,'z','x','c','v','b','n',0x5,0,0x4, // 5 = down, 4 = up
0 ,0xd, 0, 0,' ',',','.','m', 2, 3, // 2 = left, 3 = right
0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9};
byte ShiftedKeys[] = {'1','2','3','4','5','6','7','8','9','0',
'Q','W','E','R','T','Y','U','I','O','P',
'A','S','D','F','G','H','J','K','L',8,
0 ,'Z','X','C','V','B','N',0x5,0,0x4, // 5 = down
0 ,0xd, 0, 0,'_',',','.','M', 2, 3,
0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9};
byte SymKeys[] = {'!','2','3','$','%','6','\'','\"','(',')',
'q','w','e','r','t','y','u','i','[',']',
'=','+','-','f','g','h','j',':','?',8,
0 ,'z','x','c','v','b','n',0x5,0,0x4,
0 ,0xd, 0 , 0 ,0x1,'<','>','m', 2, 3, // 1 = menu
0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9};
//
// Power on the LCD
//
const char powerup[] PROGMEM = {
1, 0x01, // soft reset
99, 120, // 120ms delay
1, 0x11, // sleep out
1, 0x28, // display off
99, 50, // 50ms delay
3, 0xc0, 0xf8, 0x00, // Vop = 0xF0
2, 0xc3, 0x04, // BIAS = 1/14
2, 0xc4, 0x05, // Booster = x8
2, 0xd0, 0x1d, // Enable analog circuit
2, 0xb3, 0x00, // Set FOSC divider
2, 0xb5, 0x8b, // N-Line = 0
1, 0x38, // Set grayscale mode (0x39 = monochrome mode)
2, 0x3a, 0x02, // Enable DDRAM interface
2, 0x36, 0x00, // Scan direction setting
2, 0xB0, 0x9f, // Duty setting (0x87?)
5, 0xf0, 0x12,0x12,0x12,0x12, // 77Hz frame rate in all temperatures
1, 0x20, // Display inversion off
1, 0x29, // Display ON
0};
// small font
const byte ucFont[]PROGMEM = {
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x06,0x5f,0x5f,0x06,0x00,0x00,
0x00,0x07,0x07,0x00,0x07,0x07,0x00,0x00,0x14,0x7f,0x7f,0x14,0x7f,0x7f,0x14,0x00,
0x24,0x2e,0x2a,0x6b,0x6b,0x3a,0x12,0x00,0x46,0x66,0x30,0x18,0x0c,0x66,0x62,0x00,
0x30,0x7a,0x4f,0x5d,0x37,0x7a,0x48,0x00,0x00,0x04,0x07,0x03,0x00,0x00,0x00,0x00,
0x00,0x1c,0x3e,0x63,0x41,0x00,0x00,0x00,0x00,0x41,0x63,0x3e,0x1c,0x00,0x00,0x00,
0x08,0x2a,0x3e,0x1c,0x1c,0x3e,0x2a,0x08,0x00,0x08,0x08,0x3e,0x3e,0x08,0x08,0x00,
0x00,0x00,0x80,0xe0,0x60,0x00,0x00,0x00,0x00,0x08,0x08,0x08,0x08,0x08,0x08,0x00,
0x00,0x00,0x00,0x60,0x60,0x00,0x00,0x00,0x60,0x30,0x18,0x0c,0x06,0x03,0x01,0x00,
0x3e,0x7f,0x59,0x4d,0x47,0x7f,0x3e,0x00,0x40,0x42,0x7f,0x7f,0x40,0x40,0x00,0x00,
0x62,0x73,0x59,0x49,0x6f,0x66,0x00,0x00,0x22,0x63,0x49,0x49,0x7f,0x36,0x00,0x00,
0x18,0x1c,0x16,0x53,0x7f,0x7f,0x50,0x00,0x27,0x67,0x45,0x45,0x7d,0x39,0x00,0x00,
0x3c,0x7e,0x4b,0x49,0x79,0x30,0x00,0x00,0x03,0x03,0x71,0x79,0x0f,0x07,0x00,0x00,
0x36,0x7f,0x49,0x49,0x7f,0x36,0x00,0x00,0x06,0x4f,0x49,0x69,0x3f,0x1e,0x00,0x00,
0x00,0x00,0x00,0x66,0x66,0x00,0x00,0x00,0x00,0x00,0x80,0xe6,0x66,0x00,0x00,0x00,
0x08,0x1c,0x36,0x63,0x41,0x00,0x00,0x00,0x00,0x14,0x14,0x14,0x14,0x14,0x14,0x00,
0x00,0x41,0x63,0x36,0x1c,0x08,0x00,0x00,0x00,0x02,0x03,0x59,0x5d,0x07,0x02,0x00,
0x3e,0x7f,0x41,0x5d,0x5d,0x5f,0x0e,0x00,0x7c,0x7e,0x13,0x13,0x7e,0x7c,0x00,0x00,
0x41,0x7f,0x7f,0x49,0x49,0x7f,0x36,0x00,0x1c,0x3e,0x63,0x41,0x41,0x63,0x22,0x00,
0x41,0x7f,0x7f,0x41,0x63,0x3e,0x1c,0x00,0x41,0x7f,0x7f,0x49,0x5d,0x41,0x63,0x00,
0x41,0x7f,0x7f,0x49,0x1d,0x01,0x03,0x00,0x1c,0x3e,0x63,0x41,0x51,0x33,0x72,0x00,
0x7f,0x7f,0x08,0x08,0x7f,0x7f,0x00,0x00,0x00,0x41,0x7f,0x7f,0x41,0x00,0x00,0x00,
0x30,0x70,0x40,0x41,0x7f,0x3f,0x01,0x00,0x41,0x7f,0x7f,0x08,0x1c,0x77,0x63,0x00,
0x41,0x7f,0x7f,0x41,0x40,0x60,0x70,0x00,0x7f,0x7f,0x0e,0x1c,0x0e,0x7f,0x7f,0x00,
0x7f,0x7f,0x06,0x0c,0x18,0x7f,0x7f,0x00,0x1c,0x3e,0x63,0x41,0x63,0x3e,0x1c,0x00,
0x41,0x7f,0x7f,0x49,0x09,0x0f,0x06,0x00,0x1e,0x3f,0x21,0x31,0x61,0x7f,0x5e,0x00,
0x41,0x7f,0x7f,0x09,0x19,0x7f,0x66,0x00,0x26,0x6f,0x4d,0x49,0x59,0x73,0x32,0x00,
0x03,0x41,0x7f,0x7f,0x41,0x03,0x00,0x00,0x7f,0x7f,0x40,0x40,0x7f,0x7f,0x00,0x00,
0x1f,0x3f,0x60,0x60,0x3f,0x1f,0x00,0x00,0x3f,0x7f,0x60,0x30,0x60,0x7f,0x3f,0x00,
0x63,0x77,0x1c,0x08,0x1c,0x77,0x63,0x00,0x07,0x4f,0x78,0x78,0x4f,0x07,0x00,0x00,
0x47,0x63,0x71,0x59,0x4d,0x67,0x73,0x00,0x00,0x7f,0x7f,0x41,0x41,0x00,0x00,0x00,
0x01,0x03,0x06,0x0c,0x18,0x30,0x60,0x00,0x00,0x41,0x41,0x7f,0x7f,0x00,0x00,0x00,
0x08,0x0c,0x06,0x03,0x06,0x0c,0x08,0x00,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,
0x00,0x00,0x03,0x07,0x04,0x00,0x00,0x00,0x20,0x74,0x54,0x54,0x3c,0x78,0x40,0x00,
0x41,0x7f,0x3f,0x48,0x48,0x78,0x30,0x00,0x38,0x7c,0x44,0x44,0x6c,0x28,0x00,0x00,
0x30,0x78,0x48,0x49,0x3f,0x7f,0x40,0x00,0x38,0x7c,0x54,0x54,0x5c,0x18,0x00,0x00,
0x48,0x7e,0x7f,0x49,0x03,0x06,0x00,0x00,0x98,0xbc,0xa4,0xa4,0xf8,0x7c,0x04,0x00,
0x41,0x7f,0x7f,0x08,0x04,0x7c,0x78,0x00,0x00,0x44,0x7d,0x7d,0x40,0x00,0x00,0x00,
0x60,0xe0,0x80,0x84,0xfd,0x7d,0x00,0x00,0x41,0x7f,0x7f,0x10,0x38,0x6c,0x44,0x00,
0x00,0x41,0x7f,0x7f,0x40,0x00,0x00,0x00,0x7c,0x7c,0x18,0x78,0x1c,0x7c,0x78,0x00,
0x7c,0x78,0x04,0x04,0x7c,0x78,0x00,0x00,0x38,0x7c,0x44,0x44,0x7c,0x38,0x00,0x00,
0x84,0xfc,0xf8,0xa4,0x24,0x3c,0x18,0x00,0x18,0x3c,0x24,0xa4,0xf8,0xfc,0x84,0x00,
0x44,0x7c,0x78,0x4c,0x04,0x0c,0x18,0x00,0x48,0x5c,0x54,0x74,0x64,0x24,0x00,0x00,
0x04,0x04,0x3e,0x7f,0x44,0x24,0x00,0x00,0x3c,0x7c,0x40,0x40,0x3c,0x7c,0x40,0x00,
0x1c,0x3c,0x60,0x60,0x3c,0x1c,0x00,0x00,0x3c,0x7c,0x60,0x30,0x60,0x7c,0x3c,0x00,
0x44,0x6c,0x38,0x10,0x38,0x6c,0x44,0x00,0x9c,0xbc,0xa0,0xa0,0xfc,0x7c,0x00,0x00,
0x4c,0x64,0x74,0x5c,0x4c,0x64,0x00,0x00,0x08,0x08,0x3e,0x77,0x41,0x41,0x00,0x00,
0x00,0x00,0x00,0x77,0x77,0x00,0x00,0x00,0x41,0x41,0x77,0x3e,0x08,0x08,0x00,0x00,
0x02,0x03,0x01,0x03,0x02,0x03,0x01,0x00,0x70,0x78,0x4c,0x46,0x4c,0x78,0x70,0x00};
// 5x7 font (in 6x8 cell)
const unsigned char ucSmallFont[]PROGMEM = {
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x06,0x5f,0x06,0x00,0x00,0x07,0x03,0x00,
0x07,0x03,0x00,0x24,0x7e,0x24,0x7e,0x24,0x00,0x24,0x2b,0x6a,0x12,0x00,0x00,0x63,
0x13,0x08,0x64,0x63,0x00,0x36,0x49,0x56,0x20,0x50,0x00,0x00,0x07,0x03,0x00,0x00,
0x00,0x00,0x3e,0x41,0x00,0x00,0x00,0x00,0x41,0x3e,0x00,0x00,0x00,0x08,0x3e,0x1c,
0x3e,0x08,0x00,0x08,0x08,0x3e,0x08,0x08,0x00,0x00,0xe0,0x60,0x00,0x00,0x00,0x08,
0x08,0x08,0x08,0x08,0x00,0x00,0x60,0x60,0x00,0x00,0x00,0x20,0x10,0x08,0x04,0x02,
0x00,0x3e,0x51,0x49,0x45,0x3e,0x00,0x00,0x42,0x7f,0x40,0x00,0x00,0x62,0x51,0x49,
0x49,0x46,0x00,0x22,0x49,0x49,0x49,0x36,0x00,0x18,0x14,0x12,0x7f,0x10,0x00,0x2f,
0x49,0x49,0x49,0x31,0x00,0x3c,0x4a,0x49,0x49,0x30,0x00,0x01,0x71,0x09,0x05,0x03,
0x00,0x36,0x49,0x49,0x49,0x36,0x00,0x06,0x49,0x49,0x29,0x1e,0x00,0x00,0x6c,0x6c,
0x00,0x00,0x00,0x00,0xec,0x6c,0x00,0x00,0x00,0x08,0x14,0x22,0x41,0x00,0x00,0x24,
0x24,0x24,0x24,0x24,0x00,0x00,0x41,0x22,0x14,0x08,0x00,0x02,0x01,0x59,0x09,0x06,
0x00,0x3e,0x41,0x5d,0x55,0x1e,0x00,0x7e,0x11,0x11,0x11,0x7e,0x00,0x7f,0x49,0x49,
0x49,0x36,0x00,0x3e,0x41,0x41,0x41,0x22,0x00,0x7f,0x41,0x41,0x41,0x3e,0x00,0x7f,
0x49,0x49,0x49,0x41,0x00,0x7f,0x09,0x09,0x09,0x01,0x00,0x3e,0x41,0x49,0x49,0x7a,
0x00,0x7f,0x08,0x08,0x08,0x7f,0x00,0x00,0x41,0x7f,0x41,0x00,0x00,0x30,0x40,0x40,
0x40,0x3f,0x00,0x7f,0x08,0x14,0x22,0x41,0x00,0x7f,0x40,0x40,0x40,0x40,0x00,0x7f,
0x02,0x04,0x02,0x7f,0x00,0x7f,0x02,0x04,0x08,0x7f,0x00,0x3e,0x41,0x41,0x41,0x3e,
0x00,0x7f,0x09,0x09,0x09,0x06,0x00,0x3e,0x41,0x51,0x21,0x5e,0x00,0x7f,0x09,0x09,
0x19,0x66,0x00,0x26,0x49,0x49,0x49,0x32,0x00,0x01,0x01,0x7f,0x01,0x01,0x00,0x3f,
0x40,0x40,0x40,0x3f,0x00,0x1f,0x20,0x40,0x20,0x1f,0x00,0x3f,0x40,0x3c,0x40,0x3f,
0x00,0x63,0x14,0x08,0x14,0x63,0x00,0x07,0x08,0x70,0x08,0x07,0x00,0x71,0x49,0x45,
0x43,0x00,0x00,0x00,0x7f,0x41,0x41,0x00,0x00,0x02,0x04,0x08,0x10,0x20,0x00,0x00,
0x41,0x41,0x7f,0x00,0x00,0x04,0x02,0x01,0x02,0x04,0x00,0x80,0x80,0x80,0x80,0x80,
0x00,0x00,0x03,0x07,0x00,0x00,0x00,0x20,0x54,0x54,0x54,0x78,0x00,0x7f,0x44,0x44,
0x44,0x38,0x00,0x38,0x44,0x44,0x44,0x28,0x00,0x38,0x44,0x44,0x44,0x7f,0x00,0x38,
0x54,0x54,0x54,0x08,0x00,0x08,0x7e,0x09,0x09,0x00,0x00,0x18,0xa4,0xa4,0xa4,0x7c,
0x00,0x7f,0x04,0x04,0x78,0x00,0x00,0x00,0x00,0x7d,0x40,0x00,0x00,0x40,0x80,0x84,
0x7d,0x00,0x00,0x7f,0x10,0x28,0x44,0x00,0x00,0x00,0x00,0x7f,0x40,0x00,0x00,0x7c,
0x04,0x18,0x04,0x78,0x00,0x7c,0x04,0x04,0x78,0x00,0x00,0x38,0x44,0x44,0x44,0x38,
0x00,0xfc,0x44,0x44,0x44,0x38,0x00,0x38,0x44,0x44,0x44,0xfc,0x00,0x44,0x78,0x44,
0x04,0x08,0x00,0x08,0x54,0x54,0x54,0x20,0x00,0x04,0x3e,0x44,0x24,0x00,0x00,0x3c,
0x40,0x20,0x7c,0x00,0x00,0x1c,0x20,0x40,0x20,0x1c,0x00,0x3c,0x60,0x30,0x60,0x3c,
0x00,0x6c,0x10,0x10,0x6c,0x00,0x00,0x9c,0xa0,0x60,0x3c,0x00,0x00,0x64,0x54,0x54,
0x4c,0x00,0x00,0x08,0x3e,0x41,0x41,0x00,0x00,0x00,0x00,0x77,0x00,0x00,0x00,0x00,
0x41,0x41,0x3e,0x08,0x00,0x02,0x01,0x02,0x01,0x00,0x00,0x3c,0x26,0x23,0x26,0x3c};
uint8_t getPinInfo(uint8_t pin, volatile uint8_t **iDDR, volatile uint8_t **iPort, int bInput)
{
uint8_t port, bit;
port = (pin & 0xf0); // hex port (A,B,D,E,F)
bit = pin & 0x7;
switch (port)
{
case 0xA0: // really port G
*iPort = (bInput) ? &PING : &PORTG;
*iDDR = &DDRG;
break;
case 0xB0:
*iPort = (bInput) ? &PINB : &PORTB;
*iDDR = &DDRB;
break;
case 0xD0:
*iPort = (bInput) ? &PIND : &PORTD;
*iDDR = &DDRD;
break;
case 0xE0:
*iPort = (bInput) ? &PINE : &PORTE;
*iDDR = &DDRE;
break;
case 0xF0:
*iPort = (bInput) ? &PINF : &PORTF;
*iDDR = &DDRF;
break;
}
return bit;
} /* getPinInfo() */
//
// Simplified pin numbering scheme uses a hex number to specify the port number
// and bit. Top 4 bits = port (B/D/E/F/G), bottom 3 bits specify the bit of the port
// e.g. 0xB4 = PORTB, bit 4, 0Ax is for port G
//
void mypinMode(uint8_t pin, uint8_t mode)
{
uint8_t bit;
volatile uint8_t *iPort, *iDDR;
bit = getPinInfo(pin, &iDDR, &iPort, 0);
switch (mode)
{
case INPUT:
*iDDR &= ~(1<<bit);
break;
case INPUT_PULLUP:
*iDDR |= (1<<bit);
*iPort |= (1<<bit); // set the output high, then set it as an input
*iDDR &= ~(1<<bit);
break;
case OUTPUT:
*iDDR |= (1<<bit);
break;
}
} /* mypinMode() */
void mydigitalWrite(uint8_t pin, uint8_t value)
{
uint8_t bit;
volatile uint8_t *iPort, *iDDR;
bit = getPinInfo(pin, &iDDR, &iPort, 0);
if (value == LOW)
{
*iPort &= ~(1<<bit);
}
else
{
*iPort |= (1<<bit);
}
} /* mydigitalWrite() */
uint8_t mydigitalRead(uint8_t pin)
{
uint8_t bit;
volatile uint8_t *iPort, *iDDR;
bit = getPinInfo(pin, &iDDR, &iPort, 1);
if (*iPort & (1<<bit))
return HIGH;
else
return LOW;
} /* mydigitalRead() */
//
// Called when the power button is pressed to wake up the system
// Power up the display
//
ISR (INT2_vect)
{
// cancel sleep as a precaution
sleep_disable();
}
//
// Put the device in a deep sleep to save power
// Wakes up when pressing the "power" button
//
void SRXESleep(void)
{
// Turn off the LCD
SRXEPowerDown();
TRXPR = 1 << SLPTR; // send transceiver to sleep
// disable ADC
ADCSRA = 0;
DDRD &= ~(1 << PORTD2); //PIN INT2 as input
PORTD |= (1 << PORTD2); // pull-up resistor, the pin is forced to 1 if nothing is connected
EIMSK &= ~(1 << INT2); //disabling interrupt on INT2
EICRA &= ~((1<<ISC21) | (1<<ISC20)); // low level triggers interrupt
EIFR |= (1 << INTF2); //clear interrupt flag
EIMSK |= (1 << INT2); //enabling interrupt flag on INT2
set_sleep_mode (SLEEP_MODE_PWR_DOWN);
sleep_enable();
// turn off brown-out enable in software
// BODS must be set to one and BODSE must be set to zero within four clock cycles
// MCUCR = bit (BODS) | bit (BODSE);
// The BODS bit is automatically cleared after three clock cycles
// MCUCR = bit (BODS);
// We are guaranteed that the sleep_cpu call will be done
// as the processor executes the next instruction after
// interrupts are turned on.
sleep_cpu (); // one cycle
SRXEPowerUp();
} /* SRXESleep() */
//
// Initialize SPI using direct register access
//
void SPI_Init(void)
{
uint8_t temp;
// Initialize SPI
// Set SS to high so a connected chip will be "deselected" by default
// digitalWrite(SS, HIGH);
mydigitalWrite(0xb0, HIGH);
// When the SS pin is set as OUTPUT, it can be used as
// a general purpose output port (it doesn't influence
// SPI operations).
// pinMode(SS, OUTPUT);
mypinMode(0xb0, OUTPUT);
// SPCR = 01010000
//interrupt disabled,spi enabled,msb 1st,master,clk low when idle,
//sample on leading edge of clk,system clock/16 rate
SPCR = (1<<SPE)|(1<<MSTR) | 1;
temp=SPSR; // clear old data
temp=SPDR;
if (temp != 0) {}; // suppress compiler warning
// Set SCK as output
//pinMode(13, OUTPUT);
mypinMode(0xb1, OUTPUT);
// set MOSI as output
//pinMode(11, OUTPUT);
mypinMode(0xb2, OUTPUT);
} /* SPI_Init() */
uint8_t SPI_transfer(volatile char data)
{
SPDR = data; // Start the transmission
while (!(SPSR & (1<<SPIF))) // Wait for the end of the transmission
{
};
return SPDR; // return the received byte
} /* SPI_transfer() */
// Sets the D/C pin to data or command mode
static void SRXESetMode(int iMode)
{
mydigitalWrite(iDCPin, (iMode == MODE_DATA));
} /* SRXESetMode() */
// Write a block of pixel data to the LCD
// Length can be anything from 1 to 504 (whole display)
void SRXEWriteDataBlock(unsigned char *ucBuf, int iLen)
{
int i;
mydigitalWrite(iCSPin, LOW);
for (i=0; i<iLen; i++)
SPI_transfer(ucBuf[i]);
mydigitalWrite(iCSPin, HIGH);
}
//
// Command sequence to power ip the LCD controller
//
void SRXEPowerUp(void)
{
uint8_t ucTemp[4];
const char *pList = powerup;
uint8_t val, count, len = 1;
while (len != 0)
{
len = pgm_read_byte(pList++);
if (len == 99) // delay
{
val = pgm_read_byte(pList++);
delay(val);
}
else if (len != 0) // send command with optional data
{
val = pgm_read_byte(pList++); // command
SRXEWriteCommand(val);
count = len-1;
if (count != 0)
{
memcpy_P(ucTemp, pList, count);
pList += count;
SRXEWriteDataBlock(ucTemp, count);
}
}
}
} /* SRXEPowerUp() */
//
// Initializes the LCD controller
// Parameters: GPIO pin numbers used for the CS/DC/RST control lines
//
int SRXEInit(int iCS, int iDC, int iReset)
{
byte uc, ucTemp[8];
iCSPin = iCS;
iDCPin = iDC;
iResetPin = iReset;
SPI_Init();
mypinMode(iCSPin,OUTPUT);
mypinMode(CS_FLASH, OUTPUT); // in case we want to use the SPI flash
mydigitalWrite(iCSPin, HIGH);
mypinMode(iDCPin, OUTPUT);
mypinMode(iResetPin, OUTPUT);
// Start by reseting the LCD controller
mydigitalWrite(iResetPin, HIGH);
delay(50);
mydigitalWrite(iResetPin, LOW);
delay(5);
mydigitalWrite(iResetPin, HIGH); // take it out of reset
delay(150); // datasheet says it must be at least 120ms
// mydigitalWrite(iCSPin, LOW); // leave CS low forever
SRXEPowerUp(); // turn on and initialize the display
SRXEFill(0); // erase memory (it's already cleared by resetting it)
return 0;
} /* SRXEInit() */
//
// Turn off the LCD display (lowest power mode)
//
void SRXEPowerDown()
{
SRXEFill(0); // fill memory with zeros to go to lowest power mode
SRXEWriteCommand(0x28); // Display OFF
SRXEWriteCommand(0x10); // Sleep in
} /* SRXEPowerDown() */
//
// Write a 1 byte command to the LCD controller
//
static void SRXEWriteCommand(unsigned char c)
{
mydigitalWrite(iCSPin, LOW);
SRXESetMode(MODE_COMMAND);
SPI_transfer(c);
SRXESetMode(MODE_DATA);
mydigitalWrite(iCSPin, HIGH);
} /* SRXEWriteCommand() */
//
// Send commands to position the "cursor" to the given
// row and column
//
void SRXESetPosition(int x, int y, int cx, int cy)
{
byte ucTemp[4];
if (x > 383 || y > 159 || cx > 384 || cy > 160)
return; // invalid
SRXEWriteCommand(0x2a); // set column address
ucTemp[0] = 0; // start column high byte
ucTemp[1] = x/3; // start column low byte
ucTemp[2] = 0; // end col high byte
ucTemp[3] = (x+cx-1)/3; // end col low byte
SRXEWriteDataBlock(ucTemp, 4);
SRXEWriteCommand(0x2b); // set row address
ucTemp[0] = 0; // start row high byte
ucTemp[1] = y; // start row low byte
ucTemp[2] = 0; // end row high byte
ucTemp[3] = y+cy-1; // end row low byte
SRXEWriteDataBlock(ucTemp, 4);
SRXEWriteCommand(0x2c); // write RAM
} /* SRXESetPosition() */
//
// Scroll the screen N lines vertically (positive or negative)
// The value given represents a delta which affects the current scroll offset
//
void SRXEScroll(int iLines)
{
byte b;
iScrollOffset = (iScrollOffset + iLines) % LCD_HEIGHT;
SRXEWriteCommand(0x37); // set scroll start line
b = (byte)iScrollOffset;
SRXEWriteDataBlock(&b, 1);
} /* SRXEScroll() */
//
// Reset the scroll position to 0
//
void SRXEScrollReset(void)
{
byte b;
iScrollOffset = 0;
SRXEWriteCommand(0x37); // scroll start address
b = 0;
SRXEWriteDataBlock(&b, 1);
} /* SRXEcdScrollReset() */
void SRXEHorizontalLine(int x, int y, int length,byte color,int thickness){
byte bTemp[128];
SRXESetPosition(x*3,y,length*3,thickness);
memset(bTemp, bColorToByte[color], length);
for(int i = 0; i< thickness ; i++){
SRXEWriteDataBlock(bTemp, length);
}
}
void SRXEVerticalLine(int x, int y, int height,byte color){
byte bTemp[128];
SRXESetPosition(x*3,y,1, height );
memset(bTemp, bColorToByte[color], height);
SRXEWriteDataBlock(bTemp, height);
}
//
// Draw an outline or filled rectangle
// Only draws on byte boundaries (3 pixels wide)
// (display is treated as 128x136)
//
void SRXERectangle(int x, int y, int cx, int cy, byte color, byte bFilled)
{
byte bTemp[128];
if (x < 0 || x > 127 || y < 0 || y > 135) return;
if (x+cx > 127 || y+cy > 135) return;
if (bFilled)
{
SRXESetPosition(x*3, y, cx*3, cy);
for (y=0; y<cy; y++)
{
memset(bTemp, bColorToByte[color], cx);
SRXEWriteDataBlock(bTemp, cx);
}
} // filled
else // outline
{
// Draw top part
SRXESetPosition(x*3, y, cx*3, 1);
memset(bTemp, bColorToByte[color], cx);
SRXEWriteDataBlock(bTemp, cx);
// Bottom
SRXESetPosition(x*3, y+cy-1, cx*3, 1);
memset(bTemp, bColorToByte[color], cx);
SRXEWriteDataBlock(bTemp, cx);
// Left
SRXESetPosition(x*3, y, 3, cy);
memset(bTemp, bColorToByte[color], cy);
SRXEWriteDataBlock(bTemp, cy);
// Right
SRXESetPosition((x+cx-1)*3, y, 3, cy);
memset(bTemp, bColorToByte[color], cy);
SRXEWriteDataBlock(bTemp, cy);
}
} /* SRXERectangle() */
//
// Draw a string of normal (8x8), small (6x8) or large (16x24) characters
// At the given col+row
//
int SRXEWriteString(int x, int y, char *szMsg, int iSize, int iFGColor, int iBGColor)
{
int i, j, iLen;
unsigned char ucTemp[8], *s;
byte fgColor0, fgColor1, fgColor2, bgColor;
if (iFGColor > 3) iFGColor = 3;
if (iBGColor > 3) iBGColor = 3;
if (iFGColor == 3)
{
fgColor0 = 0xe0; fgColor1 = 0x1c; fgColor2 = 0x3;
}
else
{
fgColor0 = (byte)iFGColor << 6; // first pixel 3-bit version of the color
fgColor1 = (byte)iFGColor << 3; // second pixel
fgColor2 = (byte)iFGColor; // 3rd pixel
}
bgColor = bColorToByte[iBGColor];
iLen = strlen(szMsg);
if (iSize == FONT_LARGE || iSize == FONT_MEDIUM) // draw 12x16 or 15x16 font
{
int iWidth, iDelta;
iWidth = (iSize == FONT_LARGE) ? 15 : 12;
iDelta = (iSize == FONT_LARGE) ? 5 : 4;
if ((iWidth*iLen) + x > 384) iLen = (384 - x)/iWidth; // can't display it all
if (iLen < 0)return -1;
for (i=0; i<iLen; i++)
{
int tx, ty;
byte bTemp[84], bMask, bOut, bOut2, *d;
if (iSize == FONT_LARGE)
{
s = (unsigned char *)&ucFont[((unsigned char)szMsg[i]-32) * 8];
memcpy_P(ucTemp, s, 8); // copy from FLASH memory
}
else
{
s = (unsigned char *)&ucSmallFont[((unsigned char)szMsg[i]-32) * 6];
memcpy_P(ucTemp, s, 6);
}
// convert from 1-bpp to 2/3-bpp
d = bTemp;
s = ucTemp;
bMask = 1;
for (ty=0; ty<8; ty++)
{
for (tx=0; tx<iWidth-6; tx+=3) // 3 sets of 3 pixels
{
bOut = bOut2 = bgColor;
if (s[tx] & bMask)
{
bOut &= 0x3; // clear top 6 bits
bOut |= fgColor0 | fgColor1; // first 2 pixels (6 bits)
}
if (s[tx+1] & bMask)
{
bOut &= 0xfc; // clear bottom 2 bits
bOut2 &= 0x1f; // clear top 3 bits
bOut |= fgColor2; // third pixel (2 bits)
bOut2 |= fgColor0;
}
if (s[tx+2] & bMask)
{
bOut2 &= 0xe0; // clear lower 5 bits
bOut2 |= fgColor1 | fgColor2; // 2nd & 3rd pixel2 of second byte
}
d[0] = d[iDelta] = bOut;
if (tx != 6)
d[1] = d[iDelta+1] = bOut2;
d += 2;
} // for tx
d += 4; // skip extra line (add 4 since we incremented by 6 already)
bMask <<= 1;
} // for ty
SRXESetPosition(x, y, iWidth, 16);
SRXEWriteDataBlock(bTemp, 16*iDelta); // write character pattern
x += iWidth;
} // for each character
} // large+medium
else if (iSize == FONT_NORMAL)// draw 8x8 font
{
if ((9*iLen) + x > 384) iLen = (384 - x)/9; // can't display it all
if (iLen < 0)return -1;
for (i=0; i<iLen; i++)
{
int tx, ty;
byte bTemp[24], bMask, bOut, *d;
s = (unsigned char *)&ucFont[((unsigned char)szMsg[i]-32) * 8];
memcpy_P(ucTemp, s, 8); // copy from FLASH memory
// convert from 1-bpp to 2/3-bpp
d = bTemp;
for (ty=0; ty<8; ty++)
{
bMask = 1<<ty;
for (tx=0; tx<9; tx+=3) // 3 sets of 3 pixels
{
bOut = bgColor;
if (ucTemp[tx] & bMask)
{
bOut &= 0x1f; // clear top 3 bits
bOut |= fgColor0; // first pixel (3 bits)
}
if (ucTemp[tx+1] & bMask)
{
bOut &= 0xe3; // clear middle 3 bits
bOut |= fgColor1; // second pixel (3 bits)
}
if (tx != 6 &&
ucTemp[tx+2] & bMask)
{
bOut &= 0xfc; // clear lower 2 bits
bOut |= fgColor2; // third pixel (2 bits)
}
*d++ = bOut;
} // for tx
} // for ty
SRXESetPosition(x, y, 9, 8);
x += 9;
SRXEWriteDataBlock(bTemp, 24); // write character pattern
}
} // normal
else // 6x8
{
if ((6*iLen) + x > 384) iLen = (384 - x)/6; // can't display it all
if (iLen < 0)return -1;
for (i=0; i<iLen; i++)
{
int tx, ty;
byte bTemp[16], bMask, bOut, *d;
s = (unsigned char *)&ucSmallFont[((unsigned char)szMsg[i]-32) * 6];
memcpy_P(ucTemp, s, 6); // copy from FLASH memory
// convert from 1-bpp to 2/3-bpp
d = bTemp;
for (ty=0; ty<8; ty++)
{
bMask = 1<<ty;
for (tx=0; tx<6; tx+=3) // 2 sets of 3 pixels
{
bOut = bgColor;
if (ucTemp[tx] & bMask)
{
bOut &= 0x1f; // clear top 3 bits
bOut |= fgColor0; // first pixel (3 bits)
}
if (ucTemp[tx+1] & bMask)
{
bOut &= 0xe3; // clear middle 3 bits
bOut |= fgColor1; // second pixel (3 bits)
}
if (ucTemp[tx+2] & bMask)
{
bOut &= 0xfc; // clear lower 2 bits
bOut |= fgColor2; // third pixel (2 bits)
}
*d++ = bOut;
} // for tx
} // for ty
SRXESetPosition(x, y, 6, 8);
x += 6;
SRXEWriteDataBlock(bTemp, 16); // write character pattern
}
} // small
return 0;
} /* SRXEWriteString() */
// Fill the frame buffer with a byte pattern
// e.g. all off (0x00) or all on (0xff)
void SRXEFill(byte ucData)
{
int y;
byte temp[128];
SRXESetPosition(0, 0, 384, 136);
for (y=0; y<136; y++)
{
memset(temp, ucData, 128); // have to do this because the bytes get overwritten
SRXEWriteDataBlock(temp, 128); // fill with data byte
}
} /* SRXEFill() */
//
// External SPI flash functions (MX25L1005C - Macronix 1Mb/128KB serial flash memory)
// Data sheet here: http://www1.futureelectronics.com/doc/MACRONIX/MX25L1005CZUI-12GTR.pdf
// The CS line must be set low before each command and then set high after
// If you try to send 2 commands with the CS line left low, they won't execute
//
// ------------------
//
// Erase a 4k sector
// This is the smallest area that can be erased
// It can take around 60ms
// This function optionally waits until it completes
// returns 1 for success, 0 for failure
//
int SRXEFlashEraseSector(uint32_t ulAddr, int bWait)
{
uint8_t rc;
int timeout;
if (ulAddr & 4095L) // invalid address
return 0;
mydigitalWrite(CS_FLASH, LOW);
SPI_transfer(0x05); // read status register
rc = SPI_transfer(0);
mydigitalWrite(CS_FLASH, HIGH);
if (rc & 1) // indicates the chip is busy in a write operation
{
return 0; // fail
}
mydigitalWrite(CS_FLASH, LOW);
SPI_transfer(0x06); // WREN - Write enable
mydigitalWrite(CS_FLASH, HIGH);
mydigitalWrite(CS_FLASH, LOW);
SPI_transfer(0x20); // Sector Erase
// send 3-byte address (big-endian order)
SPI_transfer((uint8_t)(ulAddr >> 16)); // AD1
SPI_transfer((uint8_t)(ulAddr >> 8)); // AD2
SPI_transfer((uint8_t)ulAddr); // AD3
mydigitalWrite(CS_FLASH, HIGH);
// wait for the erase to complete
if (bWait)
{
rc = 1;
timeout = 0;
while (rc & 1)
{
mydigitalWrite(CS_FLASH, LOW);
SPI_transfer(0x05); // read status register
rc = SPI_transfer(0);
mydigitalWrite(CS_FLASH, HIGH);
delay(1);
timeout++;
if (timeout >= 120) // took too long, bail out
{
return 0;
}
}
} // if asked to wait
return 1;
} /* SRXEFlashEraseSector() */
//
// Write a 256-byte flash page
// Address must be on a page boundary
// returns 1 for success, 0 for failure
//
int SRXEFlashWritePage(uint32_t ulAddr, uint8_t *pSrc)
{
int i, timeout;
uint8_t rc;
if (ulAddr & 255L) // invalid address
return 0;
mydigitalWrite(CS_FLASH, LOW);
SPI_transfer(0x05); // read status register
rc = SPI_transfer(0);
mydigitalWrite(CS_FLASH, HIGH);
if (rc & 1) // indicates the chip is busy in a write operation
{
return 0; // fail
}
// Disable write protect by clearing the status bits
mydigitalWrite(CS_FLASH, LOW);
SPI_transfer(0x01); // WRSR - write status register
SPI_transfer(0x00); // set all bits to 0
mydigitalWrite(CS_FLASH, HIGH);
mydigitalWrite(CS_FLASH, LOW);
SPI_transfer(0x06); // WREN - Write enable
mydigitalWrite(CS_FLASH, HIGH);
mydigitalWrite(CS_FLASH, LOW);
SPI_transfer(0x02); // PP - page program
// send 3-byte address (big-endian order)
SPI_transfer((uint8_t)(ulAddr >> 16)); // AD1
SPI_transfer((uint8_t)(ulAddr >> 8)); // AD2
SPI_transfer((uint8_t)ulAddr); // AD3
for (i=0; i<256; i++)
{
SPI_transfer(pSrc[i]); // write the 256 data bytes
}
mydigitalWrite(CS_FLASH, HIGH); // this executes the command internally
// wait for the write to complete
rc = 1;
timeout = 0;
while (rc & 1)
{
mydigitalWrite(CS_FLASH, LOW);
SPI_transfer(0x05); // read status register
rc = SPI_transfer(0);
mydigitalWrite(CS_FLASH, HIGH);
delay(1);
timeout++;
if (timeout >= 20) // took too long, bail out
{
return 0;
}
}
return 1;
} /* SRXEFlashWritePage() */
//
// Read N bytes from SPI flash
//
int SRXEFlashRead(uint32_t ulAddr, uint8_t *pDest, int iLen)
{
int i;
mydigitalWrite(CS_FLASH, LOW);
SPI_transfer(0x03); // issue read instruction
// send 3-byte address (big-endian order)
SPI_transfer((uint8_t)(ulAddr >> 16)); // AD1
SPI_transfer((uint8_t)(ulAddr >> 8)); // AD2
SPI_transfer((uint8_t)ulAddr); // AD3
for (i=0; i<iLen; i++) // read the bytes out
{
*pDest++ = SPI_transfer(0); // need to write something to read from SPI
}
mydigitalWrite(CS_FLASH, HIGH); // de-activate
return 1;
} /* SRXEFlashRead() */
//
// Scan the rows and columns and store the results in the key map
//
void SRXEScanKeyboard(void)
{
byte r, c;
for (r=0; r<ROWS; r++)
{
mypinMode(rowPins[r], INPUT_PULLUP);
}
// save current keymap to compare for pressed/released keys
memcpy(bOldKeyMap, bKeyMap, sizeof(bKeyMap));
for (c=0; c<COLS; c++)
{
bKeyMap[c] = 0;
mypinMode(colPins[c], OUTPUT);
mydigitalWrite(colPins[c], LOW); // test this column
for (r=0; r<ROWS; r++)
{
if (mydigitalRead(rowPins[r]) == LOW)
bKeyMap[c] |= (1 << r); // set a bit for each pressed key
} // for r
mydigitalWrite(colPins[c], HIGH); // leave pin in high impedance state
mypinMode(colPins[c], INPUT);
} // for c
} /* SRXEScanKeyboard() */
//
// Return a pointer to the internal key map
// (10 bytes with 6 bits each)
//
byte *SRXEGetKeyMap(void)
{
return bKeyMap;
}
//
// Return the current key pressed
// includes code to provide shift + sym adjusted output
//
byte SRXEGetKey(void)
{
byte bShift, bSym, *pKeys;
byte iCol, iRow;
byte bMask;
byte bKey = 0;
SRXEScanKeyboard();
bShift = bKeyMap[0] & 0x08;
bSym = bKeyMap[0] & 0x10;
for (iCol = 0; iCol < COLS; iCol++)
{
bMask = 1;
for (iRow=0; iRow < ROWS; iRow++, bMask <<= 1)
{
if ((bKeyMap[iCol] & bMask) == bMask && (bOldKeyMap[iCol] & bMask) == 0)
{
// make sure it's not shift/sym
if (iCol == 0 && (iRow == 3 || iRow == 4)) // shift/sym, ignore
continue;
// valid key, adjust it and return
pKeys = OriginalKeys;
if (bShift) pKeys = ShiftedKeys;
else if (bSym) pKeys = SymKeys;
bKey = pKeys[(iRow*COLS)+iCol];
}
} // for iRow
} // for iCol