Christian Dupaty / Arduino_MKRRGB

This example demonstrates how to draw on the MKR RGB shield. The circuit: - Arduino MKR board - Arduino MKR RGB shield attached This example code is in the public domain. Orginal code for Arduino - Adaption for ARM MBED compiler (tested on NUCLEO L073RZ and NUCLEO F411RE) - Christian Dupaty

This example demonstrates how to draw on the arduino MKR RGB shield

Orginal code for Arduino : https://docs.arduino.cc/hardware/mkr-rgb-shield

Adaption for ARM MBED compiler (tested on NUCLEO L073RZ and NUCLEO F411RE)

Christian Dupaty oct 2021 see http://genelaix.free.fr

MKRRGBMatrix.cpp@0:10ce458ab6fa, 2021-10-05 (annotated)

Committer:
cdupaty
Date:
Tue Oct 05 16:07:13 2021 +0000
Revision:
0:10ce458ab6fa
This example demonstrates how to draw on the;   MKR RGB shield  ; https://store.arduino.cc/products/arduino-mkr-rgb-shield?selectedStore=eu;   Orginal code for Arduino;    - Adaption for ARM MBED compiler (tested on NUCLEO L073RZ and NUCLEO F411RE);    - ...

Who changed what in which revision?

UserRevisionLine numberNew contents of line
cdupaty 0:10ce458ab6fa 1 /*
cdupaty 0:10ce458ab6fa 2 This file is part of the Arduino_MKRRGB library.
cdupaty 0:10ce458ab6fa 3 Copyright (c) 2019 Arduino SA. All rights reserved.
cdupaty 0:10ce458ab6fa 4
cdupaty 0:10ce458ab6fa 5 This library is free software; you can redistribute it and/or
cdupaty 0:10ce458ab6fa 6 modify it under the terms of the GNU Lesser General Public
cdupaty 0:10ce458ab6fa 7 License as published by the Free Software Foundation; either
cdupaty 0:10ce458ab6fa 8 version 2.1 of the License, or (at your option) any later version.
cdupaty 0:10ce458ab6fa 9
cdupaty 0:10ce458ab6fa 10 This library is distributed in the hope that it will be useful,
cdupaty 0:10ce458ab6fa 11 but WITHOUT ANY WARRANTY; without even the implied warranty of
cdupaty 0:10ce458ab6fa 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
cdupaty 0:10ce458ab6fa 13 Lesser General Public License for more details.
cdupaty 0:10ce458ab6fa 14
cdupaty 0:10ce458ab6fa 15 You should have received a copy of the GNU Lesser General Public
cdupaty 0:10ce458ab6fa 16 License along with this library; if not, write to the Free Software
cdupaty 0:10ce458ab6fa 17 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
cdupaty 0:10ce458ab6fa 18 */
cdupaty 0:10ce458ab6fa 19 #include "mbed.h"
cdupaty 0:10ce458ab6fa 20 //#include <spi.h>
cdupaty 0:10ce458ab6fa 21 //#include <wiring_private.h>
cdupaty 0:10ce458ab6fa 22
cdupaty 0:10ce458ab6fa 23 #include "MKRRGBMatrix.h"
cdupaty 0:10ce458ab6fa 24
cdupaty 0:10ce458ab6fa 25 //static SPIClass SPI_MATRIX(&sercom0, A3, A4, A3, SPI_PAD_0_SCK_1, SERCOM_RX_PAD_0);
cdupaty 0:10ce458ab6fa 26
cdupaty 0:10ce458ab6fa 27 SPI SPI_MATRIX(D11, D12, D13); // MOSI, MISO, CLK,SS
cdupaty 0:10ce458ab6fa 28
cdupaty 0:10ce458ab6fa 29 // This table is based on the formula: gamma = (int)(pow(i / 255.0, gamma) * 255 + offset)
cdupaty 0:10ce458ab6fa 30 // where gamma = 2.5 and offset is 0.5
cdupaty 0:10ce458ab6fa 31 // based on:
cdupaty 0:10ce458ab6fa 32 // https://github.com/ManiacalLabs/BiblioPixel/blob/master/bibliopixel/colors/gamma.py
cdupaty 0:10ce458ab6fa 33 static const uint8_t GAMMA_TABLE[] = {
cdupaty 0:10ce458ab6fa 34 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
cdupaty 0:10ce458ab6fa 35 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
cdupaty 0:10ce458ab6fa 36 1, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 4, 4,
cdupaty 0:10ce458ab6fa 37 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 8,
cdupaty 0:10ce458ab6fa 38 8, 8, 9, 9, 9, 10, 10, 10, 11, 11, 12, 12, 12, 13, 13, 14,
cdupaty 0:10ce458ab6fa 39 14, 15, 15, 15, 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 22,
cdupaty 0:10ce458ab6fa 40 22, 23, 23, 24, 25, 25, 26, 26, 27, 28, 28, 29, 30, 30, 31, 32,
cdupaty 0:10ce458ab6fa 41 33, 33, 34, 35, 36, 36, 37, 38, 39, 40, 40, 41, 42, 43, 44, 45,
cdupaty 0:10ce458ab6fa 42 46, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60,
cdupaty 0:10ce458ab6fa 43 61, 62, 63, 64, 65, 67, 68, 69, 70, 71, 72, 73, 75, 76, 77, 78,
cdupaty 0:10ce458ab6fa 44 80, 81, 82, 83, 85, 86, 87, 89, 90, 91, 93, 94, 95, 97, 98, 99,
cdupaty 0:10ce458ab6fa 45 101, 102, 104, 105, 107, 108, 110, 111, 113, 114, 116, 117, 119, 121, 122, 124,
cdupaty 0:10ce458ab6fa 46 125, 127, 129, 130, 132, 134, 135, 137, 139, 141, 142, 144, 146, 148, 150, 151,
cdupaty 0:10ce458ab6fa 47 153, 155, 157, 159, 161, 163, 165, 166, 168, 170, 172, 174, 176, 178, 180, 182,
cdupaty 0:10ce458ab6fa 48 184, 186, 189, 191, 193, 195, 197, 199, 201, 204, 206, 208, 210, 212, 215, 217,
cdupaty 0:10ce458ab6fa 49 219, 221, 224, 226, 228, 231, 233, 235, 238, 240, 243, 245, 248, 250, 253, 255
cdupaty 0:10ce458ab6fa 50 };
cdupaty 0:10ce458ab6fa 51
cdupaty 0:10ce458ab6fa 52 RGBMatrixClass::RGBMatrixClass() :
cdupaty 0:10ce458ab6fa 53 ArduinoGraphics(RGB_MATRIX_WIDTH, RGB_MATRIX_HEIGHT)
cdupaty 0:10ce458ab6fa 54 {
cdupaty 0:10ce458ab6fa 55 SPI_MATRIX.frequency(4000000);
cdupaty 0:10ce458ab6fa 56 }
cdupaty 0:10ce458ab6fa 57
cdupaty 0:10ce458ab6fa 58 RGBMatrixClass::~RGBMatrixClass()
cdupaty 0:10ce458ab6fa 59 {
cdupaty 0:10ce458ab6fa 60 }
cdupaty 0:10ce458ab6fa 61
cdupaty 0:10ce458ab6fa 62 int RGBMatrixClass::begin()
cdupaty 0:10ce458ab6fa 63 {
cdupaty 0:10ce458ab6fa 64 if (!ArduinoGraphics::begin()) {
cdupaty 0:10ce458ab6fa 65 return 0;
cdupaty 0:10ce458ab6fa 66 }
cdupaty 0:10ce458ab6fa 67
cdupaty 0:10ce458ab6fa 68 textFont(Font_5x7);
cdupaty 0:10ce458ab6fa 69
cdupaty 0:10ce458ab6fa 70 // zero the matrix up to the end frame, and fill the end frame
cdupaty 0:10ce458ab6fa 71 memset(_buffer, 0x00, 4 + 4 * RGB_MATRIX_WIDTH * RGB_MATRIX_HEIGHT);
cdupaty 0:10ce458ab6fa 72 memset(_buffer + 4 + 4 * RGB_MATRIX_WIDTH * RGB_MATRIX_HEIGHT, 0xff, sizeof(_buffer) - (4 + 4 * RGB_MATRIX_WIDTH * RGB_MATRIX_HEIGHT));
cdupaty 0:10ce458ab6fa 73
cdupaty 0:10ce458ab6fa 74 //SPI_MATRIX.begin();
cdupaty 0:10ce458ab6fa 75 // SPI_MATRIX.beginTransaction(SPISettings(12e6, MSBFIRST, SPI_MODE0));
cdupaty 0:10ce458ab6fa 76
cdupaty 0:10ce458ab6fa 77 //pinPeripheral(A3, PIO_SERCOM_ALT);
cdupaty 0:10ce458ab6fa 78 //pinPeripheral(A4, PIO_SERCOM_ALT);
cdupaty 0:10ce458ab6fa 79
cdupaty 0:10ce458ab6fa 80 brightness(127);
cdupaty 0:10ce458ab6fa 81
cdupaty 0:10ce458ab6fa 82 return 1;
cdupaty 0:10ce458ab6fa 83 }
cdupaty 0:10ce458ab6fa 84
cdupaty 0:10ce458ab6fa 85 void RGBMatrixClass::end()
cdupaty 0:10ce458ab6fa 86 {
cdupaty 0:10ce458ab6fa 87 //pinMode(A3, INPUT);
cdupaty 0:10ce458ab6fa 88 //pinMode(A4, INPUT);
cdupaty 0:10ce458ab6fa 89
cdupaty 0:10ce458ab6fa 90 //SPI_MATRIX.end();
cdupaty 0:10ce458ab6fa 91
cdupaty 0:10ce458ab6fa 92 ArduinoGraphics::end();
cdupaty 0:10ce458ab6fa 93 }
cdupaty 0:10ce458ab6fa 94
cdupaty 0:10ce458ab6fa 95
cdupaty 0:10ce458ab6fa 96 void RGBMatrixClass::brightness(uint8_t brightness)
cdupaty 0:10ce458ab6fa 97 {
cdupaty 0:10ce458ab6fa 98 if (brightness != 0 && brightness < 8) {
cdupaty 0:10ce458ab6fa 99 brightness = 8;
cdupaty 0:10ce458ab6fa 100 }
cdupaty 0:10ce458ab6fa 101
cdupaty 0:10ce458ab6fa 102 // scale the brightness from: 0 - 255 to 0 - 31
cdupaty 0:10ce458ab6fa 103 brightness = 0xe0 | (brightness >> 3);
cdupaty 0:10ce458ab6fa 104
cdupaty 0:10ce458ab6fa 105 for (int i = 0; i < (RGB_MATRIX_WIDTH * RGB_MATRIX_HEIGHT); i++) {
cdupaty 0:10ce458ab6fa 106 _buffer[4 + i * 4] = brightness;
cdupaty 0:10ce458ab6fa 107 }
cdupaty 0:10ce458ab6fa 108
cdupaty 0:10ce458ab6fa 109 //SPI_MATRIX.transfer(_buffer, sizeof(_buffer));
cdupaty 0:10ce458ab6fa 110 for(int i=0;i<sizeof(_buffer);i++)
cdupaty 0:10ce458ab6fa 111 {
cdupaty 0:10ce458ab6fa 112 SPI_MATRIX.write(_buffer[i]);
cdupaty 0:10ce458ab6fa 113 }
cdupaty 0:10ce458ab6fa 114 }
cdupaty 0:10ce458ab6fa 115
cdupaty 0:10ce458ab6fa 116 void RGBMatrixClass::beginDraw()
cdupaty 0:10ce458ab6fa 117 {
cdupaty 0:10ce458ab6fa 118 ArduinoGraphics::beginDraw();
cdupaty 0:10ce458ab6fa 119 }
cdupaty 0:10ce458ab6fa 120
cdupaty 0:10ce458ab6fa 121 void RGBMatrixClass::endDraw()
cdupaty 0:10ce458ab6fa 122 {
cdupaty 0:10ce458ab6fa 123 ArduinoGraphics::endDraw();
cdupaty 0:10ce458ab6fa 124
cdupaty 0:10ce458ab6fa 125 //SPI_MATRIX.transfer(_buffer, sizeof(_buffer));
cdupaty 0:10ce458ab6fa 126 for(int i=0;i<sizeof(_buffer);i++)
cdupaty 0:10ce458ab6fa 127 {
cdupaty 0:10ce458ab6fa 128 SPI_MATRIX.write(_buffer[i]);
cdupaty 0:10ce458ab6fa 129 }
cdupaty 0:10ce458ab6fa 130 }
cdupaty 0:10ce458ab6fa 131
cdupaty 0:10ce458ab6fa 132 void RGBMatrixClass::set(int x, int y, uint8_t r, uint8_t g, uint8_t b)
cdupaty 0:10ce458ab6fa 133 {
cdupaty 0:10ce458ab6fa 134 if (x < 0 || x >= RGB_MATRIX_WIDTH || y < 0 || y >= RGB_MATRIX_HEIGHT) {
cdupaty 0:10ce458ab6fa 135 return;
cdupaty 0:10ce458ab6fa 136 }
cdupaty 0:10ce458ab6fa 137
cdupaty 0:10ce458ab6fa 138 int n = y * RGB_MATRIX_WIDTH + x;
cdupaty 0:10ce458ab6fa 139
cdupaty 0:10ce458ab6fa 140 _buffer[5 + n * 4] = GAMMA_TABLE[b];
cdupaty 0:10ce458ab6fa 141 _buffer[6 + n * 4] = GAMMA_TABLE[g];
cdupaty 0:10ce458ab6fa 142 _buffer[7 + n * 4] = GAMMA_TABLE[r];
cdupaty 0:10ce458ab6fa 143 }
cdupaty 0:10ce458ab6fa 144
cdupaty 0:10ce458ab6fa 145 RGBMatrixClass MATRIX;