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added vertical chaining #51

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added vertical chaining #51

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23 changes: 19 additions & 4 deletions PxMatrix.h
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Original file line number Diff line number Diff line change
Expand Up @@ -136,6 +136,9 @@ class PxMATRIX : public Adafruit_GFX {
// Set the number of panels that make up the display area width
inline void setPanelsWidth(uint8_t panels);

// Set the number of panels that make up the display area height
inline void setPanelsHeight(uint8_t panels);

// Set the brightness of the panels
inline void setBrightness(uint8_t brightness);

Expand All @@ -160,6 +163,7 @@ class PxMATRIX : public Adafruit_GFX {
uint8_t _width;
uint8_t _height;
uint8_t _panels_width;
uint8_t _panels_height;
uint8_t _rows_per_buffer;
uint8_t _row_sets_per_buffer;
uint8_t _panel_width_bytes;
Expand Down Expand Up @@ -250,6 +254,7 @@ inline void PxMATRIX::init(uint8_t width, uint8_t height,uint8_t LATCH, uint8_t
_height = height;
_brightness=255;
_panels_width = 1;
_panels_height = 1;

_rows_per_buffer = _height/2;
_panel_width_bytes = (_width/_panels_width)/8;
Expand Down Expand Up @@ -296,6 +301,10 @@ inline void PxMATRIX::setPanelsWidth(uint8_t panels) {
_panel_width_bytes = (_width/_panels_width)/8;
}

inline void PxMATRIX::setPanelsHeight(uint8_t panels) {
_panels_height=panels;
}

inline void PxMATRIX::setRotate(bool rotate) {
_rotate=rotate;
}
Expand Down Expand Up @@ -467,11 +476,17 @@ inline void PxMATRIX::fillMatrixBuffer(int16_t x, int16_t y, uint8_t r, uint8_t
// can only ever be 0/1 since there are only ever 2 separate input sets present for this variety of panels (R1G1B1/R2G2B2)
uint8_t which_buffer = y/_rows_per_buffer;
uint8_t x_byte = x/8;
// assumes panels are only ever chained for more width
uint8_t which_panel = x_byte/_panel_width_bytes;
// height from one panel
uint8_t p_height = _height / _panels_height;
// decides on which panel the LED is placed
// considering horizonzal and vertical chaining
// counting starts with 1 on works line per line
uint8_t which_panel = x_byte/_panel_width_bytes + (y/p_height) * _panels_width;
// decides which section of the panel is used
// dependent on _row_pattern
uint8_t which_section_on_panel = (y%p_height) /_row_pattern;
uint8_t in_row_byte_offset = x_byte%_panel_width_bytes;
// this could be pretty easily extended to vertical stacking as well
total_offset_r = _row_offset[y] - in_row_byte_offset - _panel_width_bytes*(_row_sets_per_buffer*(_panels_width*which_buffer + which_panel) + vert_index_in_buffer);
total_offset_r = _row_offset[y] - in_row_byte_offset - _panel_width_bytes*(which_panel + which_section_on_panel * _panels_width * _panels_height);
#ifdef double_buffer
total_offset_r -= buffer_size*selected_buffer;
#endif
Expand Down