Arduino code<\/a>.<\/p>\n\n\n\n\/*\n Joystick Controlled Pong Game on Dot Matrix\n by VEGA Processors, www.vegaprocessors.in\n\n Library Required: 1) MD_MAX72xx [https:\/\/github.com\/MajicDesigns\/MD_MAX72XX]\n 2) Grove_4Digital_Display by Seeed-Studio [https:\/\/github.com\/Seeed-Studio\/Grove_4Digital_Display]\n*\/\n\n\n#include <MD_MAX72xx.h>\n#include <SPI.h>\n#include <TM1637.h>\n\nSPIClass SPI(0); \/\/ selecting SPI port-0\n\n#define SPEED_FROM_ANALOG 0 \/\/ optional to use analog input for speed control\n#define DEBUG 0 \/\/ Enable or disable (default) debugging output\n#define CLK 1 \/\/CLK of TM1637 is connected to GPIO-1 pin of Aries Board\n#define DIO 0 \/\/DI0 of TM1637 is connected to GPIO-0 pin of Aries Board\n\n#if DEBUG\n#define PRINT(s, v) { Serial.print(F(s)); Serial.print(v); } \/\/ Print a string followed by a value (decimal)\n#define PRINTX(s, v) { Serial.print(F(s)); Serial.print(v, HEX); } \/\/ Print a string followed by a value (hex)\n#define PRINTS(s) { Serial.print(F(s)); } \/\/ Print a string\n#else\n#define PRINT(s, v) \/\/ Print a string followed by a value (decimal)\n#define PRINTX(s, v) \/\/ Print a string followed by a value (hex)\n#define PRINTS(s) \/\/ Print a string\n#endif\n\nTM1637 tm(CLK,DIO);\n\n#define HARDWARE_TYPE MD_MAX72XX::FC16_HW\n#define MAX_DEVICES 1 \/\/ Define the number of devices we have in the chain and the hardware interface\n#define CS_PIN 10 \/\/ connect CS pin to GPIO-10\n\/* NOTE: You can use any GPIO pin *\/\n\nMD_MAX72XX mx = MD_MAX72XX(HARDWARE_TYPE, CS_PIN, MAX_DEVICES);\n\n#if SPEED_FROM_ANALOG\nconst uint8_t SPEED_POT = A1;\n#endif\n\n\/\/ --------------------\n\/\/ Constant parameters\n\/\/\nconst uint32_t TEXT_MOVE_DELAY = 100; \/\/ in milliseconds\nconst uint32_t BAT_MOVE_DELAY = 50; \/\/ in milliseconds\nconst uint32_t BALL_MOVE_DELAY = 100; \/\/ in milliseconds\nconst uint32_t END_GAME_DELAY = 2000; \/\/ in milliseconds\n\nconst uint8_t BAT_SIZE = 3; \/\/ in pixels, odd number looks best\n\nchar *welcome;\nbool messageComplete;\nstatic int score;\nint finalScore;\n\n\/\/ ========== General Variables ===========\n\/\/\nuint32_t prevTime = 0; \/\/ used for remembering the mills() value\nuint32_t prevBatTime = 0; \/\/ used for bat timing\n\n\/\/ ========== Control routines ===========\n\/\/\n\nuint8_t scrollDataSource(uint8_t dev, MD_MAX72XX::transformType_t t)\n\/\/ Callback function for data that is required for scrolling into the display\n{\n static char* p;\n static enum { INIT, LOAD_CHAR, SHOW_CHAR, BETWEEN_CHAR } state = INIT;\n static uint8_t curLen, showLen;\n static uint8_t cBuf[15];\n uint8_t colData = 0; \/\/ blank column is the default\n\n \/\/ finite state machine to control what we do on the callback\n switch(state)\n {\n case INIT: \/\/ Load the new message\n p = welcome;\n messageComplete = false;\n state = LOAD_CHAR;\n break;\n\n case LOAD_CHAR: \/\/ Load the next character from the font table\n showLen = mx.getChar(*p++, sizeof(cBuf)\/sizeof(cBuf[0]), cBuf);\n curLen = 0;\n state = SHOW_CHAR;\n\n \/\/ !! deliberately fall through to next state to start displaying\n\n case SHOW_CHAR: \/\/ display the next part of the character\n colData = cBuf[curLen++];\n if (curLen == showLen)\n {\n if (*p == '\\0') \/\/ end of message!\n {\n messageComplete = true;\n state = INIT;\n }\n else \/\/ more to come\n {\n showLen = 1;\n curLen = 0;\n state = BETWEEN_CHAR;\n }\n }\n break;\n\n case BETWEEN_CHAR: \/\/ display inter-character spacing (blank columns)\n colData = 0;\n curLen++;\n if (curLen == showLen)\n state = LOAD_CHAR;\n break;\n\n default:\n state = LOAD_CHAR;\n }\n\n return(colData);\n}\n\nvoid scrollText(void)\n{\n \/\/ Is it time to scroll the text?\n if (millis() - prevTime >= TEXT_MOVE_DELAY)\n {\n mx.transform(MD_MAX72XX::TSL); \/\/ scroll along - the callback will load all the data\n prevTime = millis(); \/\/ starting point for next time\n }\n}\n\nvoid resetDisplay(void)\n{\n mx.control(MD_MAX72XX::INTENSITY, MAX_INTENSITY\/2);\n mx.control(MD_MAX72XX::UPDATE, MD_MAX72XX::ON);\n mx.clear();\n}\n\ninline bool swL(void) { return(analogRead(0)>1000); }\ninline bool swR(void) { return(analogRead(0)<400); }\n#if SPEED_FROM_ANALOG\ninline uint32_t speed(void) { return(map(analogRead(SPEED_POT),0, 1640, 0, 300)); }\n#else\ninline uint32_t speed(void) { return(BALL_MOVE_DELAY); }\n#endif\n\nvoid drawBat(int8_t x, int8_t y, bool bOn = true)\n{\n for (uint8_t i=0; i<BAT_SIZE; i++)\n mx.setPoint(y, x + i, bOn);\n}\n\nvoid drawBall(int8_t x, int8_t y, bool bOn = true)\n{\n mx.setPoint(y, x, bOn);\n}\n\nvoid displayNumber(int num){ \n tm.display(3, num % 10); \n tm.display(2, num \/ 10 % 10); \n tm.display(1, num \/ 100 % 10); \n tm.display(0, num \/ 1000 % 10);\n}\n\nvoid setup(void)\n{\n mx.begin();\n tm.init();\n\n \/\/set brightness; 0-7\n tm.set(7);\n displayNumber(0000);\n \n#if SPEED_FROM_ANALOG\n pinMode(SPEED_POT, INPUT);\n#endif\n\n#if DEBUG\n Serial.begin(115200);\n#endif\n PRINTS(\"\\n[MD_MAX72XX Simple Pong]\");\n}\n\nvoid loop(void)\n{\n static enum:uint8_t { INIT, WELCOME, PLAY_INIT, WAIT_START, PLAY, END , FINAL_SCORE } state = INIT;\n \n static int8_t ballX, ballY;\n static int8_t batX;\n const int8_t batY = ROW_SIZE - 1;\n\n static int8_t deltaX, deltaY; \/\/ initialisesd in FSM\n\n switch (state)\n {\n case INIT:\n PRINTS(\"\\n>>INIT\");\n welcome = (char*)\"** PONG **\";\n resetDisplay();\n mx.setShiftDataInCallback(scrollDataSource);\n prevTime = 0;\n state = WELCOME;\n break;\n\n case WELCOME:\n PRINTS(\"\\n>>WELCOME\");\n scrollText();\n if (messageComplete) state = PLAY_INIT;\n break;\n\n case PLAY_INIT:\n PRINTS(\"\\n>>PLAY_INIT\");\n displayNumber(0000);\n digitalWrite(24, HIGH);\n digitalWrite(22, LOW);\n mx.setShiftDataInCallback(nullptr);\n state = WAIT_START;\n mx.clear();\n batX = (COL_SIZE - BAT_SIZE) \/ 2;\n ballX = batX + (BAT_SIZE \/ 2);\n ballY = batY - 1;\n deltaY = -1; \/\/ always heading up at the start\n deltaX = 0; \/\/ initialized in the direction of first bat movement\n drawBat(batX, batY);\n drawBall(ballX, ballY);\n break;\n\n case WAIT_START:\n \/\/PRINTS(\"\\n>>WAIT_START\");\n if (swL()) deltaX = 1;\n if (swR()) deltaX = -1;\n if (deltaX != 0)\n {\n prevTime = prevBatTime = millis();\n state = PLAY;\n }\n break;\n\n case PLAY:\n \/\/ === Move the bat if time has expired\n if (millis() - prevBatTime >= BAT_MOVE_DELAY)\n {\n if (swL()) \/\/ left switch move\n {\n PRINTS(\"\\n>>PLAY - move bat L\");\n drawBat(batX, batY, false);\n batX++;\n if (batX + BAT_SIZE >= COL_SIZE) batX = COL_SIZE - BAT_SIZE;\n drawBat(batX, batY);\n }\n\n if (swR()) \/\/ right switch move\n {\n PRINTS(\"\\n>>PLAY - move bat R\");\n drawBat(batX, batY, false);\n batX--;\n if (batX < 0) batX = 0;\n drawBat(batX, batY);\n }\n\n prevBatTime = millis(); \/\/ set up for next time;\n }\n\n \/\/ === Move the ball if its time to do so\n if (millis() - prevTime >= speed())\n {\n PRINTS(\"\\n>>PLAY - \");\n\n drawBall(ballX, ballY, false);\n\n \/\/ new ball positions\n ballX += deltaX;\n ballY += deltaY;\n\n \/\/ check for edge collisions\n if (ballX >= COL_SIZE - 1 || ballX <= 0) \/\/ side bounce\n {\n PRINTS(\"side bounce\");\n deltaX *= -1;\n }\n if (ballY <= 0)\n {\n PRINTS(\"top bounce\");\n deltaY *= -1; \/\/ top bounce\n }\n\n \/\/=== Check for side bounce\/bat collision\n if (ballY == batY - 1 && deltaY == 1) \/\/ just above the bat and travelling towards it\n {\n score += 1;\n displayNumber(score);\n PRINT(\"check bat x=\", batX); PRINTS(\" - \");\n if ((ballX >= batX) && (ballX <= batX + BAT_SIZE - 1)) \/\/ over the bat - just bounce vertically\n {\n deltaY = -1;\n PRINT(\"bounce off dy=\", deltaY);\n }\n else if ((ballX == batX - 1) || ballX == batX + BAT_SIZE) \/\/ hit corner of bat - also bounce horizontal\n {\n deltaY = -1;\n if (ballX != COL_SIZE-1 && ballX != 0) \/\/ edge effects elimination\n deltaX *= -1;\n PRINT(\"hit corner dx=\", deltaX);\n PRINT(\" dy=\", deltaY);\n }\n }\n\n drawBall(ballX, ballY);\n\n \/\/ check if end of game\n if (ballY == batY)\n {\n PRINTS(\"\\n>>PLAY - past bat! -> end of game\");\n state = END;\n finalScore = score;\n score = 0;\n }\n\n prevTime = millis();\n }\n break;\n\n case END:\n delay(20);\n PRINTS(\"\\n>>END\");\n sprintf(welcome, \"GAME OVER \");\n digitalWrite(22, HIGH);\n digitalWrite(24, LOW);\n mx.setShiftDataInCallback(scrollDataSource);\n prevTime = 0;\n scrollText();\n if (messageComplete) state = FINAL_SCORE;\n break;\n\n case FINAL_SCORE:\n delay(20);\n Serial.print(\"SCORE = \");\n Serial.println(finalScore);\n sprintf(welcome, \" SCORE : %d \", finalScore);\n mx.setShiftDataInCallback(scrollDataSource);\n prevTime = 0;\n scrollText();\n if (messageComplete) state = PLAY_INIT;\n break;\n \n default:\n PRINT(\"\\n>>UNHANDLED !!! \", state);\n state = INIT;\n break;\n }\n delay(50);\n}\n<\/code><\/pre>\n\n\n\nProcedure<\/h2>\n\n\n\n Let\u2019s power up the boards. Make sure the Laptop\/Desktop\/PC which we\u2019re using should be preinstalled with Arduino IDE and VEGA ARIES boards of latest version.<\/p>\n\n\n\n
\nNow, Open <\/strong>the Arduino IDE<\/li>\n\n\n\nCreate a new Sketch File -> New<\/strong><\/li>\n\n\n\nCopy-paste<\/strong> the above Arduino code to it.<\/li>\n\n\n\nMake sure you have selected ARIES v3 Board from Tools<\/strong> -> Board<\/strong> -> VEGA Processor: ARIES Boards<\/strong> -> ARIES v3<\/strong><\/li>\n\n\n\nSelect Programmer as VEGA XMODEM from Tools<\/strong> -> Programmer<\/strong> -> VEGA XMODEM<\/strong><\/li>\n\n\n\nAlso select appropriate port,\u00a0Tools<\/strong>\u00a0->\u00a0Port<\/strong>\u00a0->\u00a0COM* (ARIES Board)<\/strong><\/li>\n<\/ul>\n\n\n\n
\nNow, Upload <\/strong>the code in the ARIES v3 board.<\/li>\n<\/ul>\n\n\n\nOutput<\/h2>\n\n\n\n Once the code is uploaded, game name will display on 8X8 LED Matrix i.e., PONG. After that bat and ball will display on screen. To start the game, move the joystick to the left or right. <\/p>\n\n\n\n
Live score will display on 4-Digit display.<\/p>\n\n\n\n<\/video><\/figure>\n","protected":false},"excerpt":{"rendered":"In this tutorial we will be making PONG Game with ARIES v3 board. I am sure you played this game on your mobile phone, let try it on LED Matrix. Here we will be using 8×8 LED Matrix to display the game, 4-Digit display to display the score and Joystick to control the game. Prerequisites […]<\/p>\n","protected":false},"author":14,"featured_media":3233,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[75,95,76,31,24],"class_list":["post-3062","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-projects","tag-aries-v2-board","tag-aries-v3-board","tag-c-dac","tag-thejas32","tag-vegaprocessor"],"_links":{"self":[{"href":"https:\/\/vegaprocessors.in\/blog\/wp-json\/wp\/v2\/posts\/3062","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vegaprocessors.in\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vegaprocessors.in\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vegaprocessors.in\/blog\/wp-json\/wp\/v2\/users\/14"}],"replies":[{"embeddable":true,"href":"https:\/\/vegaprocessors.in\/blog\/wp-json\/wp\/v2\/comments?post=3062"}],"version-history":[{"count":17,"href":"https:\/\/vegaprocessors.in\/blog\/wp-json\/wp\/v2\/posts\/3062\/revisions"}],"predecessor-version":[{"id":4494,"href":"https:\/\/vegaprocessors.in\/blog\/wp-json\/wp\/v2\/posts\/3062\/revisions\/4494"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vegaprocessors.in\/blog\/wp-json\/wp\/v2\/media\/3233"}],"wp:attachment":[{"href":"https:\/\/vegaprocessors.in\/blog\/wp-json\/wp\/v2\/media?parent=3062"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vegaprocessors.in\/blog\/wp-json\/wp\/v2\/categories?post=3062"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vegaprocessors.in\/blog\/wp-json\/wp\/v2\/tags?post=3062"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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