ScStw/ESP32-HUB75-MatrixPanel-DMA
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#338

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Randomise rows.
This commit is contained in:
mrfaptastic 2023-03-18 20:50:36 +00:00
parent 9d36abeeaf
commit 3333f0b11d
1 changed files with 14 additions and 1 deletions
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15
src/ESP32-HUB75-MatrixPanel-I2S-DMA.cpp
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@ -188,8 +188,21 @@ void MatrixPanel_I2S_DMA::configureDMA(const HUB75_I2S_CFG &_cfg)
num_dma_payload_colour_depths = 1; num_dma_payload_colour_depths = 1;
} }
// Create row vector for a row shuffle.
std::vector<int> v;
for (int i = 0; i < ROWS_PER_FRAME; i++) { v.push_back(i); }
for (int i = 1; i < ROWS_PER_FRAME-5; i++)
{
std::iter_swap(v.begin()+i,v.begin()+i+5);
}
for (int &row: v)
{
// Serial.println (row, DEC);
}
// Fill DMA linked lists for both frames (as in, halves of the HUB75 panel) and if double buffering is enabled, link it up for both buffers. // Fill DMA linked lists for both frames (as in, halves of the HUB75 panel) and if double buffering is enabled, link it up for both buffers.
for (int row = 0; row < ROWS_PER_FRAME; row++) //for (int row = 0; row < ROWS_PER_FRAME; row++)
for (int &row: v)
{ {
// first set of data is LSB through MSB, single pass (IF TOTAL SIZE < DMA_MAX) - all colour bits are displayed once, which takes care of everything below and including LSBMSB_TRANSITION_BIT // first set of data is LSB through MSB, single pass (IF TOTAL SIZE < DMA_MAX) - all colour bits are displayed once, which takes care of everything below and including LSBMSB_TRANSITION_BIT
// NOTE: size must be less than DMA_MAX - worst case for library: 16-bpp with 256 pixels per row would exceed this, need to break into two // NOTE: size must be less than DMA_MAX - worst case for library: 16-bpp with 256 pixels per row would exceed this, need to break into two