好玩的Memory LCD - 数码之家

void JDI_MIP_Display::drawPixel(int16_t x, int16_t y, uint16_t color)
{
if(x < 0 || x >= width() || y < 0 || y >= height()){
return;
}
int pixelIdx = ((width() / 2) * y) + (x / 2);
if(x % 2 == 0){
_backBuffer[pixelIdx] &= 0x0F;
_backBuffer[pixelIdx] |= (color & 0x0F) << 4;
}
else{
_backBuffer[pixelIdx] &= 0xF0;
_backBuffer[pixelIdx] |= color & 0x0F;
}
}

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void JDI_MIP_Display::drawPixel(int16_t x, int16_t y, uint16_t color)
{
if (x < 0 || x >= width() || y < 0 || y >= height())
{
return;
}
int16_t t;
switch (rotation)
{
case 1:
t = x;
x = WIDTH - 1 - y;
y = t;
break;
case 2:
x = WIDTH - 1 - x;
y = HEIGHT - 1 - y;
break;
case 3:
t = x;
x = y;
y = HEIGHT - 1 - t;
break;
default:
break;
}
int pixelIdx = ((WIDTH / 2) * y) + (x / 2);
// 一char8位,前4位后4位存两个像素点,判断x奇偶,确定x是前4位还是后4位
if (x % 2 == 0)
{
_backBuffer[pixelIdx] &= 0x0F;
_backBuffer[pixelIdx] |= (color & 0x0F) << 4;
}
else
{
_backBuffer[pixelIdx] &= 0xF0;
_backBuffer[pixelIdx] |= color & 0x0F;
}
}

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// MIT License
//
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files(the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions :
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
#include <JDI_MIP_Display.h>
JDI_MIP_Display::JDI_MIP_Display() : Adafruit_GFX(DISPLAY_WIDTH, DISPLAY_HEIGHT)
{
_scs = PIN_SCS;
_disp = PIN_DISP;
_frontlight = PIN_FRONTLIGHT;
}
void JDI_MIP_Display::begin()
{
_background = COLOR_BLACK;
digitalWrite(_scs, LOW);
pinMode(_scs, OUTPUT);
pinMode(_disp, OUTPUT);
pinMode(_frontlight, OUTPUT);
memset(&_backBuffer[0], (char)((_background & 0x0F) | ((_background & 0x0F) << 4)), sizeof(_backBuffer));
#ifdef DIFF_LINE_UPDATE
memset(&_dispBuffer[0], (char)((_background & 0x0F) | ((_background & 0x0F) << 4)), sizeof(_dispBuffer));
#endif
SPI.begin();
}
void JDI_MIP_Display::refresh()
{
for (int i = 0; i < HEIGHT; i++)
{
int lineIdx = HALF_WIDTH * i;
char *line_cmd;
#ifdef DIFF_LINE_UPDATE
if (compareBuffersLine(lineIdx) == true)
continue;
memcpy(&_dispBuffer[lineIdx], &_backBuffer[lineIdx], HALF_WIDTH);
line_cmd = &_dispBuffer[lineIdx];
#else
line_cmd = &_backBuffer[lineIdx];
#endif
sendLineCommand(line_cmd, i);
}
}
bool JDI_MIP_Display::compareBuffersLine(int lineIndex)
{
#ifdef DIFF_LINE_UPDATE
for (int i = 0; i < HALF_WIDTH; i++)
{
int pixelIdx = lineIndex + i;
if (_backBuffer[pixelIdx] != _dispBuffer[pixelIdx])
return false;
}
#endif
return true;
}
void JDI_MIP_Display::clearScreen()
{
digitalWrite(_scs, HIGH);
SPI.transfer(CMD_ALL_CLEAR);
SPI.transfer(0x00);
digitalWrite(_scs, LOW);
}
void JDI_MIP_Display::sendLineCommand(char *line_cmd, int line)
{
if ((line < 0) || (line >= HEIGHT))
{
return;
}
digitalWrite(_scs, HIGH);
SPI.transfer(CMD_UPDATE);
SPI.transfer(line + 1);
for (int i = 0; i < HALF_WIDTH; i++)
{
SPI.transfer(line_cmd[i]);
}
SPI.transfer(0x00);
SPI.transfer(0x00);
digitalWrite(_scs, LOW);
}
void JDI_MIP_Display::drawPixel(int16_t x, int16_t y, uint16_t color)
{
if (x < 0 || x >= width() || y < 0 || y >= height())
{
return;
}
int16_t t;
switch (rotation)
{
case 1:
t = x;
x = WIDTH - 1 - y;
y = t;
break;
case 2:
x = WIDTH - 1 - x;
y = HEIGHT - 1 - y;
break;
case 3:
t = x;
x = y;
y = HEIGHT - 1 - t;
break;
default:
break;
}
int pixelIdx = ((WIDTH / 2) * y) + (x / 2);
// 一char8位,前4位后4位存两个像素点,判断x奇偶,确定x是前4位还是后4位
if (x % 2 == 0)
{
_backBuffer[pixelIdx] &= 0x0F;
_backBuffer[pixelIdx] |= (color & 0x0F) << 4;
}
else
{
_backBuffer[pixelIdx] &= 0xF0;
_backBuffer[pixelIdx] |= color & 0x0F;
}
}
void JDI_MIP_Display::setBackgroundColor(uint16_t color)
{
_background = color;
}
void JDI_MIP_Display::displayOn()
{
digitalWrite(_disp, HIGH);
}
void JDI_MIP_Display::displayOff()
{
digitalWrite(_disp, LOW);
}
void JDI_MIP_Display::frontlightOn()
{
digitalWrite(_frontlight, HIGH);
}
void JDI_MIP_Display::frontlightOff()
{
digitalWrite(_frontlight, LOW);
}

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