ScStw/ESP32-HUB75-MatrixPanel-DMA
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mrfaptastic 2021-06-24 16:37:46 +01:00
parent c049fc8b7e
commit 087e96d0d7
1 changed files with 3 additions and 2 deletions
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ESP32-HUB75-MatrixPanel-I2S-DMA.cpp
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@ -637,6 +637,7 @@ void MatrixPanel_I2S_DMA::clearFrameBuffer(bool _buff_id){
// drive latch while shifting out last bit of RGB data // drive latch while shifting out last bit of RGB data
row[dma_buff.rowBits[row_idx]->width - 2] |= BIT_LAT; // -1 pixel to compensate array index starting at 0 row[dma_buff.rowBits[row_idx]->width - 2] |= BIT_LAT; // -1 pixel to compensate array index starting at 0
row[dma_buff.rowBits[row_idx]->width - 1] |= BIT_LAT; // -1 pixel to compensate array index starting at 0
// need to disable OE before/after latch to hide row transition // need to disable OE before/after latch to hide row transition
// Should be one clock or more before latch, otherwise can get ghosting // Should be one clock or more before latch, otherwise can get ghosting
@ -661,8 +662,8 @@ void MatrixPanel_I2S_DMA::brtCtrlOE(int brt, const bool _buff_id){
if (!initialized) if (!initialized)
return; return;
if (brt > PIXELS_PER_ROW - m_cfg.latch_blanking) // can't control values larger than (row_width - latch_blanking) to avoid ongoing issues being raised about brightness and ghosting. if (brt > PIXELS_PER_ROW - (MAX_LAT_BLANKING + 2)) // can't control values larger than (row_width - latch_blanking) to avoid ongoing issues being raised about brightness and ghosting.
brt = PIXELS_PER_ROW - m_cfg.latch_blanking; brt = PIXELS_PER_ROW - (MAX_LAT_BLANKING + 2); // +2 for a bit of buffer...
if (brt < 0) if (brt < 0)
brt = 0; brt = 0;