twinotter
commented
6 years ago The problem appears to be an issue with how memory is allocated in compilation. Either commenting out some of the code in the setup() OR commenting out test2 will make this work. The code below demonstrates the problem. Issue #900 seems to have this same problem, but is unsolved.
I tried to simplify the code as much as possible and still capture the issue. I found at some point that things just suddenly worked. The code below causes the boot loop. But you can make the code work by either removing the "test2" String or commenting out the code in the setup() routine. (You can leave the Serial port initialization and sample write and still see it work successfully.)
The SmartMatrix library I'm using is here. The FastLED library is here. Otherwise, it's just the libraries included with esp32.
/*
* This example shows how to display bitmaps that are exported from GIMP and
* compiled into the sketch and stored in the Teensy's Flash memory
* See more details here:
* http://docs.pixelmatix.com/SmartMatrix/library.html#smartmatrix-library-how-to-use-the-library-drawing-raw-bitmaps
*
* This example uses only the SmartMatrix Background layer
*/
//#include <SmartLEDShieldV4.h> // uncomment this line for SmartLED Shield V4 (needs to be before #include <SmartMatrix3.h>)
#include <SmartMatrix3.h>
#include <FastLED.h>
#define COLOR_DEPTH 24 // known working: 24, 48 - If the sketch uses type `rgb24` directly, COLOR_DEPTH must be 24
const uint8_t kMatrixWidth = 64; // known working: 16, 32, 48, 64
const uint8_t kMatrixHeight = 64; // known working: 32, 64, 96, 128
const uint8_t kRefreshDepth = 24; // known working: 24, 36, 48
const uint8_t kDmaBufferRows = 2; // known working: 2-4, use 2 to save memory, more to keep from dropping frames and automatically lowering refresh rate
const uint8_t kPanelType = SMARTMATRIX_HUB75_64ROW_MOD32SCAN; // use SMARTMATRIX_HUB75_16ROW_MOD8SCAN for common 16x32 panels
const uint8_t kMatrixOptions = (SMARTMATRIX_OPTIONS_NONE); // see http://docs.pixelmatix.com/SmartMatrix for options
const uint8_t kBackgroundLayerOptions = (SM_BACKGROUND_OPTIONS_NONE);
SMARTMATRIX_ALLOCATE_BUFFERS(matrix, kMatrixWidth, kMatrixHeight, kRefreshDepth, kDmaBufferRows, kPanelType, kMatrixOptions);
SMARTMATRIX_ALLOCATE_BACKGROUND_LAYER(backgroundLayer, kMatrixWidth, kMatrixHeight, COLOR_DEPTH, kBackgroundLayerOptions);
String test1 = "test1";
String test2 = "test2";
void setup() {
Serial.begin(115200);
Serial.println("Hi!");
matrix.addLayer(&backgroundLayer);
matrix.begin();
matrix.setBrightness(128);
backgroundLayer.drawString(1,2,{255,255,255},"init...");
backgroundLayer.swapBuffers(true);
delay(2000);
}
void loop() {
}
embedded-creations
stale[bot]
Hardware:
Board: ESP32 Dev Module C Core Installation/update date: 10/apr/2018 IDE name: Arduino IDE Flash Frequency: 80Mhz Upload Speed: 921600
I'm not sure where to begin debugging this problem. I'm trying to get SmartMatrix and FastLED working on an ESP32. Separately the components work, but when I combine together, I'm getting an assert that causes a rolling reboot before anything gets started. I'm guessing a memory problem, but I'm uncertain where.
Stack results: