From f3302c9f876fa6e9e0dae671311478e2a55324d6 Mon Sep 17 00:00:00 2001
From: mrfaptastic <12006953+mrfaptastic@users.noreply.github.com>
Date: Sat, 9 Jan 2021 20:13:42 +0000
Subject: [PATCH] Update ESP32-HUB75-MatrixPanel-I2S-DMA.cpp

---
 ESP32-HUB75-MatrixPanel-I2S-DMA.cpp | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/ESP32-HUB75-MatrixPanel-I2S-DMA.cpp b/ESP32-HUB75-MatrixPanel-I2S-DMA.cpp
index 129996c..b84d6f7 100644
--- a/ESP32-HUB75-MatrixPanel-I2S-DMA.cpp
+++ b/ESP32-HUB75-MatrixPanel-I2S-DMA.cpp
@@ -519,7 +519,12 @@ void MatrixPanel_I2S_DMA::updateMatrixDMABuffer(int16_t x_coord, int16_t y_coord
         // update address/control bits
         v &= BITMASK_CTRL_CLEAR;      // reset ABCDE,EO,LAT address bits
 		
-        uint16_t _y = color_depth_idx ? y_coord : y_coord -1;
+        // normally output current rows ADDX, special case for LSB, output previous row's ADDX (as previous row is being displayed for one latch cycle)
+        // uint16_t _y = (color_depth_idx == 0) ? 
+        //  gpioRowAddress = y_coord-1;
+		
+        //uint16_t _y = color_depth_idx ? y_coord : y_coord -1;
+		uint16_t _y = y_coord;
         v|=_y << BITS_ADDR_OFFSET;         // shift row coord to match ABCDE bits from bit positions 8 to 12 and set bitvector
 
         // drive latch while shifting out last bit of RGB data
@@ -606,7 +611,8 @@ void MatrixPanel_I2S_DMA::updateMatrixDMABuffer(uint8_t red, uint8_t green, uint
       } else {
 
         // Set ABCDE address bits vector
-        uint16_t _y = color_depth_idx ? matrix_frame_parallel_row : matrix_frame_parallel_row -1;
+        //uint16_t _y = color_depth_idx ? matrix_frame_parallel_row : matrix_frame_parallel_row -1;
+		uint16_t _y = matrix_frame_parallel_row;
         _y <<= BITS_ADDR_OFFSET;    // shift row y-coord to match ABCDE bits in vector from 8 to 12
 
         for(uint16_t x_coord=0; x_coord < MATRIX_WIDTH; x_coord++) {