LedPanel.cpp

00001 /**
00002  *  Matrix16x16 LEDPanel library
00003  *
00004  *  @author  Junichi Katsu
00005  *  @version 1.0
00006  *  @date    02-April-2015
00007  *
00008  */
00009  
00010 #include "mbed.h"
00011 #include "LedPanel.h"
00012 #include "LedPanel_GFX.h"
00013 
00014 LedPanel::LedPanel(I2C *i2c): _i2c(i2c), LedPanel_GFX(16, 16)
00015 {
00016     
00017 }
00018 
00019 void LedPanel::setBrightness(uint8_t b)
00020 {
00021     if (b > 15) b = 15;
00022     
00023     uint8_t c = 0xE0 | b;
00024     char foo[1];
00025     
00026     foo[0] = c;
00027     
00028     _i2c->write(i2c_addr[0], foo, 1); 
00029     _i2c->write(i2c_addr[1], foo, 1); 
00030 }
00031 
00032 void LedPanel::blinkRate(uint8_t b)
00033 {
00034     if (b > 3) b = 0;
00035 
00036     uint8_t c = HT16K33_BLINK_CMD | HT16K33_BLINK_DISPLAYON | (b << 1);
00037 
00038     char foo[1];
00039     foo[0] = c;
00040 
00041     _i2c->write(i2c_addr[0], foo, 1);
00042     _i2c->write(i2c_addr[1], foo, 1);
00043 }
00044 
00045 void LedPanel::begin(uint8_t _addr0,uint8_t _addr1)
00046 {
00047     i2c_addr[0] = _addr0 << 1;
00048     i2c_addr[1] = _addr1 << 1;
00049 
00050     char foo[1];
00051     foo[0] = 0x21;
00052 
00053     _i2c->write(i2c_addr[0], foo, 1);
00054     _i2c->write(i2c_addr[1], foo, 1);
00055 
00056     blinkRate(HT16K33_BLINK_OFF);
00057 
00058     setBrightness(15);
00059 }
00060 
00061 void LedPanel::writeDisplay(void)
00062 {
00063     char foo[2][17];
00064     foo[0][0] = 0x00;
00065     foo[1][0] = 0x00;
00066 
00067     int j = 0;
00068     for (uint8_t i=1; i<=16; i+=2)
00069     {
00070         for(uint8_t k=0; k < 2 ; k++)
00071         {
00072             int x = displaybuffer[j + k*8] & 0xFF;
00073             foo[k][i] = x;
00074             x = displaybuffer[j + k*8] >> 8;
00075             foo[k][i+1] = x;
00076         }
00077         j++;
00078     }
00079     _i2c->write(i2c_addr[0], foo[0], 17);
00080     _i2c->write(i2c_addr[1], foo[1], 17);
00081 }
00082 
00083 void LedPanel::clear(void)
00084 {
00085     for (uint8_t i=0; i<16; i++)
00086     {
00087         displaybuffer[i] = 0;
00088     }
00089 }
00090 
00091 void LedPanel::drawPixel(int16_t x, int16_t y, uint16_t color)
00092 {
00093     if ((y < 0) || (y >= 16)) return;
00094     if ((x < 0) || (x >= 16)) return;
00095 
00096     if (color)
00097     {
00098         displaybuffer[y] |= 1 << x;
00099     }
00100     else
00101     {
00102         displaybuffer[y] &= ~(1 << x);
00103     }
00104 }
00105 
00106 void LedPanel::Scroll(int16_t x, int16_t y)
00107 {
00108     bool bit[16];
00109     for (uint8_t i=0; i<16; i++)
00110     {
00111         bit[i] = false;
00112         
00113         if( (displaybuffer[i] & 0x8000) != 0 )
00114         {
00115             bit[i] = true;
00116         }
00117         displaybuffer[i] <<= 1;
00118         
00119         if( bit[i] == true )
00120         {
00121             displaybuffer[i] |= 1;
00122         }
00123     }
00124 }