Library to drive a pair of Adafruit 16x8 led matrices (powered by Adafruit LED Backpack) rotated end to end and stuck together to make a larger matrix.
Dependencies: Adafruit_LEDBackpack
Dependents: Adafruit_LEDBackpack_32x8_App RubeGoldberg
Adafruit_32x8matrix.cpp@2:cdcd2d7d83c3, 2017-12-11 (annotated)
- Committer:
- maclobdell
- Date:
- Mon Dec 11 19:22:54 2017 +0000
- Revision:
- 2:cdcd2d7d83c3
- Parent:
- 1:ed6764fbda54
added playText function which parses a sentence and either shows the individual words (for short words under 5 chars), or scrolls them for words equal to or greater than 5 chars. also updated mbed-os library.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
maclobdell | 0:acc3c726ffe3 | 1 | #include "mbed.h" |
maclobdell | 0:acc3c726ffe3 | 2 | |
maclobdell | 0:acc3c726ffe3 | 3 | #include "Adafruit_32x8matrix.h" |
maclobdell | 0:acc3c726ffe3 | 4 | |
maclobdell | 0:acc3c726ffe3 | 5 | Adafruit_32x8matrix::Adafruit_32x8matrix(I2C *i2c, uint8_t i2c_addr, uint8_t i2c_addr2, uint8_t rotation, uint8_t rotation2, uint8_t brightness) |
maclobdell | 0:acc3c726ffe3 | 6 | |
maclobdell | 1:ed6764fbda54 | 7 | : _i2c(i2c), _matrix(_i2c), _matrix2(_i2c), _i2c_addr(i2c_addr), _i2c_addr2(i2c_addr2), _rotation(rotation), _rotation2(rotation2), _brightness(brightness) |
maclobdell | 0:acc3c726ffe3 | 8 | |
maclobdell | 0:acc3c726ffe3 | 9 | { |
maclobdell | 0:acc3c726ffe3 | 10 | |
maclobdell | 0:acc3c726ffe3 | 11 | _matrix2.begin(_i2c_addr2); |
maclobdell | 0:acc3c726ffe3 | 12 | _matrix2.setBrightness(_brightness); |
maclobdell | 0:acc3c726ffe3 | 13 | _matrix2.setRotation(_rotation2); |
maclobdell | 0:acc3c726ffe3 | 14 | _matrix2.clear(); |
maclobdell | 0:acc3c726ffe3 | 15 | _matrix2.writeDisplay(); |
maclobdell | 0:acc3c726ffe3 | 16 | |
maclobdell | 0:acc3c726ffe3 | 17 | _matrix.begin(_i2c_addr); |
maclobdell | 0:acc3c726ffe3 | 18 | _matrix.setBrightness(_brightness); |
maclobdell | 0:acc3c726ffe3 | 19 | _matrix.setRotation(_rotation); |
maclobdell | 0:acc3c726ffe3 | 20 | _matrix.clear(); |
maclobdell | 0:acc3c726ffe3 | 21 | _matrix.writeDisplay(); |
maclobdell | 0:acc3c726ffe3 | 22 | |
maclobdell | 0:acc3c726ffe3 | 23 | |
maclobdell | 0:acc3c726ffe3 | 24 | } |
maclobdell | 0:acc3c726ffe3 | 25 | |
maclobdell | 0:acc3c726ffe3 | 26 | void Adafruit_32x8matrix::scrollText(char * buffer, uint8_t buf_len, uint8_t speed) |
maclobdell | 0:acc3c726ffe3 | 27 | { |
maclobdell | 0:acc3c726ffe3 | 28 | |
maclobdell | 0:acc3c726ffe3 | 29 | // code inspired by LOLShield library |
maclobdell | 0:acc3c726ffe3 | 30 | int xoff=31;// set offset to the right end of the screen - must be signed |
maclobdell | 0:acc3c726ffe3 | 31 | for(int i=0; i< (31 + buf_len*6 +10); i++){ //scrolling loop |
maclobdell | 0:acc3c726ffe3 | 32 | for(int j=0; j<buf_len; j++){ //loop over all of the chars in the text |
maclobdell | 0:acc3c726ffe3 | 33 | if(xoff > 15){ |
maclobdell | 0:acc3c726ffe3 | 34 | _matrix2.drawChar(xoff + j*6 - 16, 0, buffer[j], 1, 0, 1); |
maclobdell | 0:acc3c726ffe3 | 35 | }else |
maclobdell | 0:acc3c726ffe3 | 36 | { |
maclobdell | 0:acc3c726ffe3 | 37 | _matrix.drawChar(xoff + j*6, 0, buffer[j], 1, 0, 1); |
maclobdell | 0:acc3c726ffe3 | 38 | _matrix2.drawChar(xoff + j*6 - 16, 0, buffer[j], 1, 0, 1); |
maclobdell | 0:acc3c726ffe3 | 39 | } |
maclobdell | 0:acc3c726ffe3 | 40 | } |
maclobdell | 0:acc3c726ffe3 | 41 | xoff--; // decrement x offset |
maclobdell | 0:acc3c726ffe3 | 42 | |
maclobdell | 0:acc3c726ffe3 | 43 | _matrix.writeDisplay(); |
maclobdell | 0:acc3c726ffe3 | 44 | _matrix2.writeDisplay(); |
maclobdell | 0:acc3c726ffe3 | 45 | Thread::wait(1000/speed); |
maclobdell | 0:acc3c726ffe3 | 46 | _matrix.clear(); |
maclobdell | 0:acc3c726ffe3 | 47 | _matrix2.clear(); |
maclobdell | 0:acc3c726ffe3 | 48 | } |
maclobdell | 0:acc3c726ffe3 | 49 | } |
maclobdell | 0:acc3c726ffe3 | 50 | |
maclobdell | 0:acc3c726ffe3 | 51 | |
maclobdell | 0:acc3c726ffe3 | 52 | void Adafruit_32x8matrix::showText(char * buffer, uint8_t buf_len, uint8_t speed) |
maclobdell | 0:acc3c726ffe3 | 53 | { |
maclobdell | 0:acc3c726ffe3 | 54 | for(int j=0; j<buf_len; j++){ //loop over all of the chars in the text |
maclobdell | 0:acc3c726ffe3 | 55 | _matrix.drawChar(j*6, 0, buffer[j], 1, 0, 1); |
maclobdell | 0:acc3c726ffe3 | 56 | _matrix2.drawChar(j*6 - 16, 0, buffer[j], 1, 0, 1); |
maclobdell | 0:acc3c726ffe3 | 57 | } |
maclobdell | 0:acc3c726ffe3 | 58 | _matrix.writeDisplay(); |
maclobdell | 0:acc3c726ffe3 | 59 | _matrix2.writeDisplay(); |
maclobdell | 0:acc3c726ffe3 | 60 | Thread::wait(1000/speed); |
maclobdell | 0:acc3c726ffe3 | 61 | _matrix.clear(); |
maclobdell | 0:acc3c726ffe3 | 62 | _matrix2.clear(); |
maclobdell | 0:acc3c726ffe3 | 63 | |
maclobdell | 0:acc3c726ffe3 | 64 | } |
maclobdell | 2:cdcd2d7d83c3 | 65 | |
maclobdell | 2:cdcd2d7d83c3 | 66 | void Adafruit_32x8matrix::playText(char * buffer, uint8_t buf_len, uint8_t speed) |
maclobdell | 2:cdcd2d7d83c3 | 67 | { |
maclobdell | 2:cdcd2d7d83c3 | 68 | char words[16][16]; //16 words max, 16 char max in each word |
maclobdell | 2:cdcd2d7d83c3 | 69 | int word_count = 0; |
maclobdell | 2:cdcd2d7d83c3 | 70 | |
maclobdell | 2:cdcd2d7d83c3 | 71 | for(int k=0; k<16; k++){ //for each word, up to 16 |
maclobdell | 2:cdcd2d7d83c3 | 72 | for(int j=0; j<16; j++){ |
maclobdell | 2:cdcd2d7d83c3 | 73 | words[k][j] = '\0'; //clear all chars |
maclobdell | 2:cdcd2d7d83c3 | 74 | } |
maclobdell | 2:cdcd2d7d83c3 | 75 | } |
maclobdell | 2:cdcd2d7d83c3 | 76 | |
maclobdell | 2:cdcd2d7d83c3 | 77 | int k = 0; //word index |
maclobdell | 2:cdcd2d7d83c3 | 78 | int m = 0; //char index in each word |
maclobdell | 2:cdcd2d7d83c3 | 79 | for(int j=0; j<buf_len; j++){//loop over all of the chars in the text |
maclobdell | 2:cdcd2d7d83c3 | 80 | if (buffer[j] == ' '){//if space, stop building the word up |
maclobdell | 2:cdcd2d7d83c3 | 81 | //not required - words[k][m+1] = '\0'; //terminate the string |
maclobdell | 2:cdcd2d7d83c3 | 82 | //printf("found word: %s\r\n",words[k]); |
maclobdell | 2:cdcd2d7d83c3 | 83 | k++; //go to next word |
maclobdell | 2:cdcd2d7d83c3 | 84 | m = 0; |
maclobdell | 2:cdcd2d7d83c3 | 85 | } |
maclobdell | 2:cdcd2d7d83c3 | 86 | else{ |
maclobdell | 2:cdcd2d7d83c3 | 87 | if(m < 16) { //limit chars to 16 |
maclobdell | 2:cdcd2d7d83c3 | 88 | words[k][m] = buffer[j]; //build up the string of chars to form words |
maclobdell | 2:cdcd2d7d83c3 | 89 | m++; //got to next char |
maclobdell | 2:cdcd2d7d83c3 | 90 | } |
maclobdell | 2:cdcd2d7d83c3 | 91 | } |
maclobdell | 2:cdcd2d7d83c3 | 92 | if(k >= 16){ //reached max words |
maclobdell | 2:cdcd2d7d83c3 | 93 | break; |
maclobdell | 2:cdcd2d7d83c3 | 94 | } |
maclobdell | 2:cdcd2d7d83c3 | 95 | |
maclobdell | 2:cdcd2d7d83c3 | 96 | } |
maclobdell | 2:cdcd2d7d83c3 | 97 | //last word may not have a space at the end that identifies it, so add one to the count |
maclobdell | 2:cdcd2d7d83c3 | 98 | if(k < 16) |
maclobdell | 2:cdcd2d7d83c3 | 99 | { |
maclobdell | 2:cdcd2d7d83c3 | 100 | k++; |
maclobdell | 2:cdcd2d7d83c3 | 101 | } |
maclobdell | 2:cdcd2d7d83c3 | 102 | |
maclobdell | 2:cdcd2d7d83c3 | 103 | //k is the word count now |
maclobdell | 2:cdcd2d7d83c3 | 104 | word_count = k; |
maclobdell | 2:cdcd2d7d83c3 | 105 | // printf("words found = %d\r\n",word_count); |
maclobdell | 2:cdcd2d7d83c3 | 106 | /* for(int n=0; n<k; n++){ |
maclobdell | 2:cdcd2d7d83c3 | 107 | printf("%s\r\n",words[n]); |
maclobdell | 2:cdcd2d7d83c3 | 108 | } |
maclobdell | 2:cdcd2d7d83c3 | 109 | */ |
maclobdell | 2:cdcd2d7d83c3 | 110 | |
maclobdell | 2:cdcd2d7d83c3 | 111 | //for each word in the string, show it |
maclobdell | 2:cdcd2d7d83c3 | 112 | for(int p=0; p<word_count; p++){ |
maclobdell | 2:cdcd2d7d83c3 | 113 | if (strlen(words[p]) > 5) //can fit about 5 chars on the screen at once, if greater use scroll. |
maclobdell | 2:cdcd2d7d83c3 | 114 | { |
maclobdell | 2:cdcd2d7d83c3 | 115 | this->scrollText(words[p],strlen(words[p]), 100); |
maclobdell | 2:cdcd2d7d83c3 | 116 | } |
maclobdell | 2:cdcd2d7d83c3 | 117 | else{ |
maclobdell | 2:cdcd2d7d83c3 | 118 | this->showText(words[p],strlen(words[p]), 1); |
maclobdell | 2:cdcd2d7d83c3 | 119 | } |
maclobdell | 2:cdcd2d7d83c3 | 120 | } |
maclobdell | 2:cdcd2d7d83c3 | 121 | |
maclobdell | 2:cdcd2d7d83c3 | 122 | |
maclobdell | 2:cdcd2d7d83c3 | 123 | } |