TFT DMA in drawBMP() disabled; fix possible but complex, see comments

adafruit · Sep 18, 2019 · 197f096 · 197f096
1 parent 9cf25fe
commit 197f096
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Showing 2 changed files with 7 additions and 2 deletions.
diff --git a/Adafruit_ImageReader.cpp b/Adafruit_ImageReader.cpp
@@ -497,7 +497,12 @@ ImageReturnCode Adafruit_ImageReader::coreBMP(
                       file.read(sdbuf, sizeof sdbuf); // Load from SD
                       if(transact) tft->startWrite(); // Start TFT SPI transact
                       if(destidx) {                   // If buffered TFT data
-                        tft->writePixels(dest, destidx, false); // Write it
+                        // Non-blocking writes (DMA) have been temporarily
+                        // disabled until this can be rewritten with two
+                        // alternating 'dest' buffers (else the nonblocking
+                        // data out is overwritten in the dest[] write below).
+                        //tft->writePixels(dest, destidx, false); // Write it
+                        tft->writePixels(dest, destidx, true); // Write it
                         destidx = 0;                  // and reset dest index
                       }
                     } else {                          // Canvas is simpler,

diff --git a/library.properties b/library.properties
@@ -1,5 +1,5 @@
 name=Adafruit ImageReader Library
-version=2.0.1
+version=2.0.2
 author=Adafruit
 maintainer=Adafruit <[email protected]>
 sentence=Companion library for Adafruit_GFX to load images from SD card.