SPKDisplay - A mbed display class and processing imaging tools for 128x64 OLEDs using the SSD1305 driver, connected via SPI.
Dependents: SPK-DVIMXR SPK-DMXer
Diff: spk_oled_ssd1305.cpp
- Revision:
- 4:a675a19c16f0
- Parent:
- 3:ade83210ecf6
--- a/spk_oled_ssd1305.cpp Thu Aug 02 13:26:18 2012 +0000 +++ b/spk_oled_ssd1305.cpp Sun Oct 28 19:53:49 2012 +0000 @@ -157,6 +157,44 @@ bufferHasChanged = true; } +void SPKDisplay::characterToBuffer(char character, int x, int row) +{ + // Font check + if (NULL == fontCharacters) return; + if (NULL == fontStartCharacter || NULL == fontEndCharacter) return; + + // Range check + if (row >= 8) row = 7; + int bStart = row*bufferWidth; + int bEnd = bStart + pixelWidth; + + int bPos = bStart + x; + + // Is it outside the range we have glyphs for? + if ((character < *fontStartCharacter) || (character > *fontEndCharacter)) + { + if (debug) + { + if (character != ' ') debug->printf("No glyph for character %c", character); + } + } + // If not, typeset it! + else + { + // Shift into our array's indexing + character -= *fontStartCharacter; + + // Write each byte's vertical column of 8bits into the buffer. + for (int j = 0; j < fontCharacters[character][0]; j++) + { + if (bPos >= bEnd) break; + buffer[bPos++] = fontCharacters[character][j+1]; + } + } + + bufferHasChanged = true; +} + void SPKDisplay::sendBuffer() { if (bufferHasChanged)