lbnshrivas
commented
6 years ago Further to my investigation on this issue, I am able to light up a single LED at a time by tweaking the parameters of my test program (without transformer). In the below program I have given rows = 8 and chain = 4 and by calling setPixel in a loop with x<128 and y<4, I am able to light up the entire 16x32 P10 single color module. Please see the below video.
Has anyone coded the transformer for this kind of panel. I would highly appreciate any help in this regard.
//--------------------Test Program--------------------------------------- `// testing 32 x 16 display pixels
include "led-matrix.h"
include "transformer.h"
include
include
include
//using rgb_matrix::GPIO; //using rgb_matrix::RGBMatrix; //using rgb_matrix::Canvas;
using namespace rgb_matrix;
static void DrawOnCanvas(Canvas canvas) { /
Really simple animation.. Plot pixels one by one. We wait between each step to have a slower animation. / for (int y = 0; y < 4; y++) { for (int x = 0; x < 128; x++) { // Show where we are on screen. Comment out if using fast animation printf("Pixel at (%d, %d)\n", x, y); // Draw a pixel at (x, y) canvas->SetPixel(x, y, 0, 0, 0); // Wait a bit... (increase the sleep time if mapping, decrease for testing). usleep(1 100 * 1000); // 1x100x1000 = 100,000 microseconds or 0.1 seconds.
} }
}
int main(int argc, char argv[]) { /
Set up GPIO pins. This fails when not running as root. / GPIO io; if (!io.Init()) return 1; /
Set up the RGBMatrix. It implements a 'Canvas' interface. / int rows = 8; // May need to change this to 4, 8, 16 or 32 int chain = 4; // Number of boards chained together, may need to double for some panels int parallel = 1; // Number of chains in parallel (1..3). > 1 for plus or Pi2 RGBMatrix matrix = new RGBMatrix(&io, rows, chain, parallel);
Canvas *canvas = matrix; canvas->Fill(255,255,255);
DrawOnCanvas(canvas); // Using the canvas.
// Animation finished. Shut down the RGB matrix. canvas->Clear(); delete canvas;
return 0; }`
KBNZOKO
hakao32
Hi Hzeller,
First of all thank you for writing such a wonderful library.
I am facing an issue while trying to use this library for a single color P10 module (HUB12). Would highly appreciate you can help me in this regard.
I have gone through the documentation which you have given and have wired my panel in the same fashion. When I ran a simple pixel test program (given below) on this module then with parameters as rows=8 and chain =1, LED at Column =1 and Row = 13, Column =9 and Row = 13, Column =17 and Row = 13 and Column =25 and Row = 13 gets lights up simultaneously. They traverse in the same fashion first horizontally i.e. after these 4 LEDs next sequence comes up with 2,18,14,26 (row 13) and so on. Once all the 32 LEDs of row 13 gets light up (in 8 steps) then the same happens for row9 and then for row 5 and then for row 1.
Please find below the video for the same. First one is with rows=8 and chain=1 https://youtu.be/4mqV_CxJLjk Second one is with rows =8 and chain =2 https://youtu.be/N3xEg1BNlAg I have also tried to tweak the different parameters like rows =16 and chain =2 but then only half of my board gets lights in the same fashion. In case if I put chain =4 then only 1/4th of the panel gets lights up.
I have gone through majority of issues which different users of this library has reported but couldn't figure out the exact mapping for my panel and because of that I am not able to come up with the transformer for this panel. Also, I have tried the new multiplexing and address type option as well but with no luck.
`// testing 32 x 16 display pixels
include "led-matrix.h"
include "transformer.h"
include
include
include
//using rgb_matrix::GPIO; //using rgb_matrix::RGBMatrix; //using rgb_matrix::Canvas;
using namespace rgb_matrix;
static void DrawOnCanvas(Canvas canvas) { /
Plot pixels one by one. We wait between each step to have a slower animation. */
for (int y = 0; y < 8; y++) { for (int x = 0; x < 32; x++) { // Show where we are on screen. Comment out if using fast animation printf("Pixel at (%d, %d)\n", x, y); // Draw a pixel at (x, y) canvas->SetPixel(x, y, 0, 0, 0); // Wait a bit... (increase the sleep time if mapping, decrease for testing). usleep(1 100 1000); // 1x100x1000 = 100,000 microseconds or 0.1 seconds.
} }
}
int main(int argc, char argv[]) { /
Set up GPIO pins. This fails when not running as root. */ GPIO io; if (!io.Init()) return 1;
/*
Set up the RGBMatrix. It implements a 'Canvas' interface. */ int rows = 8; // May need to change this to 4, 8, 16 or 32 int chain = 1; // Number of boards chained together, may need to double for some panels int parallel = 1; // Number of chains in parallel (1..3). > 1 for plus or Pi2
RGBMatrix *matrix = new RGBMatrix(&io, rows, chain, parallel);
Canvas *canvas = matrix; canvas->Fill(255,255,255);
DrawOnCanvas(canvas); // Using the canvas.
// Animation finished. Shut down the RGB matrix. canvas->Clear(); delete canvas;
return 0; }
`