mirror of
https://github.com/2martens/uni.git
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Jim Martens
1862a1f4e8
* ob es funktioniert, werden wir noch sehen Signed-óff-by: Jim Martens <github@2martens.de>
265 lines
8.0 KiB
C++
265 lines
8.0 KiB
C++
#include <SPI.h>
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// pins
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int slaveSelectPin = 10;
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int rstPin = 6;
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int dcPin = 5;
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// constants
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int divider = 84;
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int maxBufferIndex = 504;
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// buffer
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char screenBuffer[504];
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// ASCII data
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unsigned char font[95][6] =
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{
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{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, // space
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{ 0x00, 0x00, 0x5F, 0x00, 0x00, 0x00 }, // !
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{ 0x00, 0x07, 0x00, 0x07, 0x00, 0x00 }, // "
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{ 0x14, 0x7F, 0x14, 0x7F, 0x14, 0x00 }, // #
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{ 0x24, 0x2A, 0x7F, 0x2A, 0x12, 0x00 }, // $
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{ 0x23, 0x13, 0x08, 0x64, 0x62, 0x00 }, // %
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{ 0x36, 0x49, 0x55, 0x22, 0x50, 0x00 }, // &
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{ 0x00, 0x00, 0x07, 0x00, 0x00, 0x00 }, // '
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{ 0x00, 0x1C, 0x22, 0x41, 0x00, 0x00 }, // (
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{ 0x00, 0x41, 0x22, 0x1C, 0x00, 0x00 }, // )
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{ 0x0A, 0x04, 0x1F, 0x04, 0x0A, 0x00 }, // *
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{ 0x08, 0x08, 0x3E, 0x08, 0x08, 0x00 }, // +
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{ 0x00, 0x50, 0x30, 0x00, 0x00, 0x00 }, // ,
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{ 0x08, 0x08, 0x08, 0x08, 0x08, 0x00 }, // -
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{ 0x00, 0x60, 0x60, 0x00, 0x00, 0x00 }, // .
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{ 0x20, 0x10, 0x08, 0x04, 0x02, 0x00 }, // slash
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{ 0x3E, 0x51, 0x49, 0x45, 0x3E, 0x00 }, // 0
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{ 0x00, 0x42, 0x7F, 0x40, 0x00, 0x00 }, // 1
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{ 0x42, 0x61, 0x51, 0x49, 0x46, 0x00 }, // 2
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{ 0x21, 0x41, 0x45, 0x4B, 0x31, 0x00 }, // 3
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{ 0x18, 0x14, 0x12, 0x7F, 0x10, 0x00 }, // 4
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{ 0x27, 0x45, 0x45, 0x45, 0x39, 0x00 }, // 5
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{ 0x3C, 0x4A, 0x49, 0x49, 0x30, 0x00 }, // 6
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{ 0x03, 0x71, 0x09, 0x05, 0x03, 0x00 }, // 7
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{ 0x36, 0x49, 0x49, 0x49, 0x36, 0x00 }, // 8
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{ 0x06, 0x49, 0x49, 0x29, 0x1E, 0x00 }, // 9
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{ 0x00, 0x36, 0x36, 0x00, 0x00, 0x00 }, // :
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{ 0x00, 0x56, 0x36, 0x00, 0x00, 0x00 }, // ;
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{ 0x08, 0x14, 0x22, 0x41, 0x00, 0x00 }, // <
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{ 0x14, 0x14, 0x14, 0x14, 0x14, 0x00 }, // =
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{ 0x00, 0x41, 0x22, 0x14, 0x08, 0x00 }, // >
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{ 0x02, 0x01, 0x51, 0x09, 0x06, 0x00 }, // ?
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{ 0x32, 0x49, 0x79, 0x41, 0x3E, 0x00 }, // @
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{ 0x7E, 0x11, 0x11, 0x11, 0x7E, 0x00 }, // A
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{ 0x7F, 0x49, 0x49, 0x49, 0x36, 0x00 }, // B
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{ 0x3E, 0x41, 0x41, 0x41, 0x22, 0x00 }, // C
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{ 0x7F, 0x41, 0x41, 0x41, 0x3E, 0x00 }, // D
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{ 0x7F, 0x49, 0x49, 0x49, 0x41, 0x00 }, // E
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{ 0x7F, 0x09, 0x09, 0x09, 0x01, 0x00 }, // F
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{ 0x3E, 0x41, 0x41, 0x49, 0x7A, 0x00 }, // G
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{ 0x7F, 0x08, 0x08, 0x08, 0x7F, 0x00 }, // H
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{ 0x00, 0x41, 0x7F, 0x41, 0x00, 0x00 }, // I
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{ 0x20, 0x40, 0x41, 0x3F, 0x01, 0x00 }, // J
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{ 0x7F, 0x08, 0x14, 0x22, 0x41, 0x00 }, // K
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{ 0x7F, 0x40, 0x40, 0x40, 0x40, 0x00 }, // L
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{ 0x7F, 0x02, 0x0C, 0x02, 0x7F, 0x00 }, // M
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{ 0x7F, 0x04, 0x08, 0x10, 0x7F, 0x00 }, // N
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{ 0x3E, 0x41, 0x41, 0x41, 0x3E, 0x00 }, // O
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{ 0x7F, 0x09, 0x09, 0x09, 0x06, 0x00 }, // P
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{ 0x3E, 0x41, 0x51, 0x21, 0x5E, 0x00 }, // Q
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{ 0x7F, 0x09, 0x19, 0x29, 0x46, 0x00 }, // R
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{ 0x26, 0x49, 0x49, 0x49, 0x32, 0x00 }, // S
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{ 0x01, 0x01, 0x7F, 0x01, 0x01, 0x00 }, // T
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{ 0x3F, 0x40, 0x40, 0x40, 0x3F, 0x00 }, // U
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{ 0x1F, 0x20, 0x40, 0x20, 0x1F, 0x00 }, // V
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{ 0x3F, 0x40, 0x38, 0x40, 0x3F, 0x00 }, // W
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{ 0x63, 0x14, 0x08, 0x14, 0x63, 0x00 }, // X
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{ 0x07, 0x08, 0x70, 0x08, 0x07, 0x00 }, // Y
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{ 0x61, 0x51, 0x49, 0x45, 0x43, 0x00 }, // Z
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{ 0x00, 0x7F, 0x41, 0x41, 0x00, 0x00 }, // [
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{ 0x02, 0x04, 0x08, 0x10, 0x20, 0x00 }, // backslash
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{ 0x00, 0x41, 0x41, 0x7F, 0x00, 0x00 }, // ]
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{ 0x04, 0x02, 0x01, 0x02, 0x04, 0x00 }, // ^
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{ 0x40, 0x40, 0x40, 0x40, 0x40, 0x00 }, // _
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{ 0x00, 0x01, 0x02, 0x04, 0x00, 0x00 }, // `
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{ 0x20, 0x54, 0x54, 0x54, 0x78, 0x00 }, // a
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{ 0x7F, 0x48, 0x44, 0x44, 0x38, 0x00 }, // b
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{ 0x38, 0x44, 0x44, 0x44, 0x20, 0x00 }, // c
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{ 0x38, 0x44, 0x44, 0x48, 0x7F, 0x00 }, // d
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{ 0x38, 0x54, 0x54, 0x54, 0x18, 0x00 }, // e
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{ 0x08, 0x7E, 0x09, 0x01, 0x02, 0x00 }, // f
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{ 0x08, 0x54, 0x54, 0x54, 0x3C, 0x00 }, // g
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{ 0x7F, 0x08, 0x04, 0x04, 0x78, 0x00 }, // h
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{ 0x00, 0x48, 0x7D, 0x40, 0x00, 0x00 }, // i
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{ 0x20, 0x40, 0x44, 0x3D, 0x00, 0x00 }, // j
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{ 0x7F, 0x10, 0x28, 0x44, 0x00, 0x00 }, // k
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{ 0x00, 0x41, 0x7F, 0x40, 0x00, 0x00 }, // l
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{ 0x7C, 0x04, 0x78, 0x04, 0x78, 0x00 }, // m
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{ 0x7C, 0x08, 0x04, 0x04, 0x78, 0x00 }, // n
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{ 0x38, 0x44, 0x44, 0x44, 0x38, 0x00 }, // o
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{ 0x7C, 0x14, 0x14, 0x14, 0x08, 0x00 }, // p
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{ 0x08, 0x14, 0x14, 0x18, 0x7C, 0x00 }, // q
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{ 0x7C, 0x08, 0x04, 0x04, 0x08, 0x00 }, // r
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{ 0x48, 0x54, 0x54, 0x54, 0x20, 0x00 }, // s
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{ 0x04, 0x3F, 0x44, 0x40, 0x20, 0x00 }, // t
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{ 0x3C, 0x40, 0x40, 0x20, 0x7C, 0x00 }, // u
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{ 0x1C, 0x20, 0x40, 0x20, 0x1C, 0x00 }, // v
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{ 0x3C, 0x40, 0x30, 0x40, 0x3C, 0x00 }, // w
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{ 0x44, 0x28, 0x10, 0x28, 0x44, 0x00 }, // x
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{ 0x0C, 0x50, 0x50, 0x50, 0x3C, 0x00 }, // y
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{ 0x44, 0x64, 0x54, 0x4C, 0x44, 0x00 }, // z
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{ 0x00, 0x08, 0x36, 0x41, 0x00, 0x00 }, // {
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{ 0x00, 0x00, 0x7F, 0x00, 0x00, 0x00 }, // |
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{ 0x00, 0x41, 0x36, 0x08, 0x00, 0x00 }, // }
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{ 0x10, 0x08, 0x08, 0x10, 0x08, 0x00 } // ~
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};
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void setup()
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{
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Serial.begin(9600);
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// intialize SPI
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SPI.begin(slaveSelectPin);
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SPI.setClockDivider(slaveSelectPin, divider);
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// initialize pins
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pinMode(dcPin, OUTPUT);
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pinMode(rstPin, OUTPUT);
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// initial reset of display
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resetDisplay();
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// initialization of display
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digitalWrite(dcPin, LOW);
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SPI.transfer(slaveSelectPin, 0x21);
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SPI.transfer(slaveSelectPin, 0x14);
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SPI.transfer(slaveSelectPin, 0xb0);
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SPI.transfer(slaveSelectPin, 0x20);
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SPI.transfer(slaveSelectPin, 0x0c);
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digitalWrite(dcPin, HIGH);
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// initialize screen buffer
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resetBuffer();
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}
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/**
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* Loop function for main code
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*/
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void loop()
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{
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// write my data
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printChar(9, 33, 'J');
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printChar(9, 39, 'i');
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printChar(9, 45, 'm');
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printChar(19, 21, 'M');
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printChar(19, 27, 'a');
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printChar(19, 33, 'r');
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printChar(19, 39, 't');
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printChar(19, 45, 'e');
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printChar(19, 51, 'n');
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printChar(19, 57, 's');
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printChar(29, 21, '6');
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printChar(29, 27, '4');
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printChar(29, 33, '2');
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printChar(29, 39, '0');
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printChar(29, 45, '3');
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printChar(29, 51, '2');
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printChar(29, 57, '3');
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flushBuffer();
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delay(5000);
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}
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/**
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* Resets display.
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*/
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void resetDisplay()
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{
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digitalWrite(rstPin, LOW);
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delay(500);
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digitalWrite(rstPin, HIGH);
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}
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/**
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* Writes the screen buffer into the display.
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*
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* It does NOT reset the buffer.
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*/
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void flushBuffer()
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{
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for (int i = 0; i < maxBufferIndex; i++) {
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SPI.transfer(slaveSelectPin, screenBuffer[i]);
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}
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}
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/**
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* Resets the buffer.
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*
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* Writes 0 in all fields.
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*/
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void resetBuffer()
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{
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for (int i = 0; i < maxBufferIndex; i++) {
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screenBuffer[i] = 0x0;
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}
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}
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/**
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* Sets the pixel at the given location.
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* @param x
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* @param y
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* @param value
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*/
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void setPixel(int x, int y, int value)
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{
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int bank = x / 8;
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int relativeRow = x - bank * 8;
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int bankStartIndex = bank * 84;
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int index = bankStartIndex + y;
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char bitValue = 0x0;
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if (value == 1) {
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bitValue = 0xff;
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}
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char existingValue = screenBuffer[index];
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char pixelMask = 1 << relativeRow;
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pixelMask = 0x0 | pixelMask;
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char invMask = ~ pixelMask;
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char newValue = pixelMask & bitValue;
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char finalExistingValue = existingValue & invMask;
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char finalValue = finalExistingValue | newValue;
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screenBuffer[index] = finalValue;
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}
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/**
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* Prints given char at given location.
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*
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* @param x
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* @param y
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* @param value
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*
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* @return 0 on success, -1 otherwise
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*/
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int printChar(int x, int y, char value)
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{
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// guardians
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if (x > 40 || y > 78) {
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// absolute guardian
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return -1;
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}
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// TODO relative guardian to existing buffer
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char space = ' ';
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int arrayIndex = value - space;
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for (int i = 0; i < 6; i++) {
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char data = font[arrayIndex][i];
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for (int _x = 0; _x < 8; _x++) {
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char bitmask = 1 << _x;
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int pixel = bitmask & data;
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setPixel(x + _x, y + i, pixel);
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}
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}
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return 0;
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}
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