kohacraft Lab
/
kc_tv_hack
tv hack http://kohacraft.com/archives/1037090651.html
main.cpp
- Committer:
- kohacraft
- Date:
- 2015-08-25
- Revision:
- 0:d341bd9e7da7
File content as of revision 0:d341bd9e7da7:
#include "mbed.h" #include "MCP4922.h" DigitalOut myled(LED1); MCP4922 ad(0, dp9, dp4); //spiチャンネル1 /CS /LAT // x,y = -1〜+1 をADのフルレンジへ変換し出力する void outAd( float x , float y ) { int xtemp , ytemp; xtemp = (int)(2048.0 * x + 2047.0); if( xtemp < 0 ) xtemp = 0; if( xtemp > 4095 ) xtemp = 4095; ytemp = (int)(2048.0 * y + 2047.0); if( ytemp < 0 ) ytemp = 0; if( ytemp > 4095 ) ytemp = 4095; ad.select(0); ad.write( xtemp ); ad.select(1); ad.write( ytemp ); ad.update(); } int main() { ad.autoUpdate = 0; //しない ad.VrefA = 3300; //Vrefの電圧 ad.VrefB = 3300; //Vrefの電圧 ad.select(0); ad.buffered = 1; //Vrefのアンプ有効化 ad.setGain(1); //出力ゲインx1 ad.select(1); ad.buffered = 1; //Vrefのアンプ有効化 ad.setGain(1); //出力ゲインx1 float pi = 3.141592653589793238462; while(1) { for( float y=-1.0 ; y<=1 ; y+=1.0/60 ) for( float x=-1.0 ; x<=1 ; x+=1.0/60 ) { outAd( x, y ); } } }