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ShiftOut.h@2:78dd1100a67b, 2021-09-10 (annotated)
- Committer:
- rogerzuber
- Date:
- Fri Sep 10 08:19:02 2021 +0000
- Revision:
- 2:78dd1100a67b
Board Beispiel Zuber
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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rogerzuber | 2:78dd1100a67b | 1 | /* |
rogerzuber | 2:78dd1100a67b | 2 | * Copyright 2015 Benjamin R. Moeklegaard |
rogerzuber | 2:78dd1100a67b | 3 | * |
rogerzuber | 2:78dd1100a67b | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
rogerzuber | 2:78dd1100a67b | 5 | * you may not use this file except in compliance with the License. |
rogerzuber | 2:78dd1100a67b | 6 | * You may obtain a copy of the License at |
rogerzuber | 2:78dd1100a67b | 7 | * |
rogerzuber | 2:78dd1100a67b | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
rogerzuber | 2:78dd1100a67b | 9 | * |
rogerzuber | 2:78dd1100a67b | 10 | * Unless required by applicable law or agreed to in writing, software |
rogerzuber | 2:78dd1100a67b | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
rogerzuber | 2:78dd1100a67b | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
rogerzuber | 2:78dd1100a67b | 13 | * See the License for the specific language governing permissions and |
rogerzuber | 2:78dd1100a67b | 14 | * limitations under the License. |
rogerzuber | 2:78dd1100a67b | 15 | */ |
rogerzuber | 2:78dd1100a67b | 16 | |
rogerzuber | 2:78dd1100a67b | 17 | #ifndef SHIFT_H |
rogerzuber | 2:78dd1100a67b | 18 | #define SHIFT_H |
rogerzuber | 2:78dd1100a67b | 19 | |
rogerzuber | 2:78dd1100a67b | 20 | //Constant for managing n-numbers of registers, Function supported (writeByte, writeBit, writeBitAtPos) |
rogerzuber | 2:78dd1100a67b | 21 | #define REGISTER_CNT 2 |
rogerzuber | 2:78dd1100a67b | 22 | /** |
rogerzuber | 2:78dd1100a67b | 23 | * This is a library for easy interfacing with the SN74HC595N 8-bit Shift Register. |
rogerzuber | 2:78dd1100a67b | 24 | * The library includes functions for writing bits, bytes and animation array to the register. |
rogerzuber | 2:78dd1100a67b | 25 | * The Functions are mainly based for writting 8-bits or one byte and can be moddified to work |
rogerzuber | 2:78dd1100a67b | 26 | * with multiple shift registers. |
rogerzuber | 2:78dd1100a67b | 27 | *@code |
rogerzuber | 2:78dd1100a67b | 28 | * #include "mbed.h" |
rogerzuber | 2:78dd1100a67b | 29 | * #include "ShiftOut.h" |
rogerzuber | 2:78dd1100a67b | 30 | * ShiftOut reg(PA_8, PA_9, PC_7, PB_6, D1); |
rogerzuber | 2:78dd1100a67b | 31 | * |
rogerzuber | 2:78dd1100a67b | 32 | * int main(){ |
rogerzuber | 2:78dd1100a67b | 33 | * while(1){ |
rogerzuber | 2:78dd1100a67b | 34 | * reg.writeBitAtPos(3, 1); |
rogerzuber | 2:78dd1100a67b | 35 | * wait(2); |
rogerzuber | 2:78dd1100a67b | 36 | * reg.writeByte(0x30); |
rogerzuber | 2:78dd1100a67b | 37 | * wait(2); |
rogerzuber | 2:78dd1100a67b | 38 | * } |
rogerzuber | 2:78dd1100a67b | 39 | * }@endcode |
rogerzuber | 2:78dd1100a67b | 40 | */ |
rogerzuber | 2:78dd1100a67b | 41 | |
rogerzuber | 2:78dd1100a67b | 42 | class ShiftOut |
rogerzuber | 2:78dd1100a67b | 43 | { |
rogerzuber | 2:78dd1100a67b | 44 | public: |
rogerzuber | 2:78dd1100a67b | 45 | |
rogerzuber | 2:78dd1100a67b | 46 | /** Create a ShiftOut interface |
rogerzuber | 2:78dd1100a67b | 47 | * |
rogerzuber | 2:78dd1100a67b | 48 | * @param ser Serial data line |
rogerzuber | 2:78dd1100a67b | 49 | * @param srclk Data register clock |
rogerzuber | 2:78dd1100a67b | 50 | * @param rclk Output register clock |
rogerzuber | 2:78dd1100a67b | 51 | * @param oe Output enable (Active Low) |
rogerzuber | 2:78dd1100a67b | 52 | * @param reset Reset line for data register (Active Low) |
rogerzuber | 2:78dd1100a67b | 53 | * Writing Byte Example: |
rogerzuber | 2:78dd1100a67b | 54 | * @code |
rogerzuber | 2:78dd1100a67b | 55 | * #include "mbed.h" |
rogerzuber | 2:78dd1100a67b | 56 | * #include "ShiftOut.h" |
rogerzuber | 2:78dd1100a67b | 57 | * |
rogerzuber | 2:78dd1100a67b | 58 | * ShiftOut reg(PA_8, PA_9, PC_7, PB_6, D1); |
rogerzuber | 2:78dd1100a67b | 59 | * int main() |
rogerzuber | 2:78dd1100a67b | 60 | * { |
rogerzuber | 2:78dd1100a67b | 61 | * reg.writeByte(0x00); //Writes each bit to the SN74HC595N |
rogerzuber | 2:78dd1100a67b | 62 | * while(1) { |
rogerzuber | 2:78dd1100a67b | 63 | * wait_ms(300); |
rogerzuber | 2:78dd1100a67b | 64 | * } |
rogerzuber | 2:78dd1100a67b | 65 | * } |
rogerzuber | 2:78dd1100a67b | 66 | * @endcode |
rogerzuber | 2:78dd1100a67b | 67 | */ |
rogerzuber | 2:78dd1100a67b | 68 | |
rogerzuber | 2:78dd1100a67b | 69 | |
rogerzuber | 2:78dd1100a67b | 70 | ShiftOut(PinName ser, PinName srclk, PinName rclk, |
rogerzuber | 2:78dd1100a67b | 71 | PinName oe, PinName reset); |
rogerzuber | 2:78dd1100a67b | 72 | |
rogerzuber | 2:78dd1100a67b | 73 | /** |
rogerzuber | 2:78dd1100a67b | 74 | * Writes a byte to the shift register |
rogerzuber | 2:78dd1100a67b | 75 | * @param byte 0xXX or numbers from 0-255 |
rogerzuber | 2:78dd1100a67b | 76 | */ |
rogerzuber | 2:78dd1100a67b | 77 | void writeByte(unsigned char); |
rogerzuber | 2:78dd1100a67b | 78 | |
rogerzuber | 2:78dd1100a67b | 79 | void write2Byte(unsigned int); |
rogerzuber | 2:78dd1100a67b | 80 | |
rogerzuber | 2:78dd1100a67b | 81 | |
rogerzuber | 2:78dd1100a67b | 82 | /** |
rogerzuber | 2:78dd1100a67b | 83 | * Writes a bit to the first output on the shift register |
rogerzuber | 2:78dd1100a67b | 84 | * @param bit 0 or 1 |
rogerzuber | 2:78dd1100a67b | 85 | */ |
rogerzuber | 2:78dd1100a67b | 86 | |
rogerzuber | 2:78dd1100a67b | 87 | void writeBit(unsigned char); |
rogerzuber | 2:78dd1100a67b | 88 | |
rogerzuber | 2:78dd1100a67b | 89 | /** |
rogerzuber | 2:78dd1100a67b | 90 | * Writes bits from an 2D array, with configurable delay |
rogerzuber | 2:78dd1100a67b | 91 | * @param int array, int lines, int delay_ms |
rogerzuber | 2:78dd1100a67b | 92 | * writes a 2D array with n-lines with a configurable delay in ms |
rogerzuber | 2:78dd1100a67b | 93 | * @code |
rogerzuber | 2:78dd1100a67b | 94 | * #include "mbed.h" |
rogerzuber | 2:78dd1100a67b | 95 | * #include "ShiftOut.h" |
rogerzuber | 2:78dd1100a67b | 96 | * ShiftOut reg(PA_8, PA_9, PC_7, PB_6, D1); |
rogerzuber | 2:78dd1100a67b | 97 | * |
rogerzuber | 2:78dd1100a67b | 98 | * int main(){ |
rogerzuber | 2:78dd1100a67b | 99 | * int strobe[][8]= {{1,0,0,0,0,0,0,0}, |
rogerzuber | 2:78dd1100a67b | 100 | * {0,1,0,0,0,0,0,0}, |
rogerzuber | 2:78dd1100a67b | 101 | * {0,0,1,0,0,0,0,0}, |
rogerzuber | 2:78dd1100a67b | 102 | * {0,0,0,1,0,0,0,0}, |
rogerzuber | 2:78dd1100a67b | 103 | * {0,0,0,0,1,0,0,0}, |
rogerzuber | 2:78dd1100a67b | 104 | * {0,0,0,0,0,1,0,0}, |
rogerzuber | 2:78dd1100a67b | 105 | * {0,0,0,0,0,0,1,0}, |
rogerzuber | 2:78dd1100a67b | 106 | * {0,0,0,0,0,0,0,1}}; |
rogerzuber | 2:78dd1100a67b | 107 | * while(1){ |
rogerzuber | 2:78dd1100a67b | 108 | * reg.animate(strobe, 8, 200); |
rogerzuber | 2:78dd1100a67b | 109 | * } |
rogerzuber | 2:78dd1100a67b | 110 | * } |
rogerzuber | 2:78dd1100a67b | 111 | * @endcode |
rogerzuber | 2:78dd1100a67b | 112 | */ |
rogerzuber | 2:78dd1100a67b | 113 | |
rogerzuber | 2:78dd1100a67b | 114 | void animate(int[][8], int, int); |
rogerzuber | 2:78dd1100a67b | 115 | |
rogerzuber | 2:78dd1100a67b | 116 | /** |
rogerzuber | 2:78dd1100a67b | 117 | * Demonstrates two animation examples by using the animate function |
rogerzuber | 2:78dd1100a67b | 118 | */ |
rogerzuber | 2:78dd1100a67b | 119 | |
rogerzuber | 2:78dd1100a67b | 120 | void animationExample(void); |
rogerzuber | 2:78dd1100a67b | 121 | |
rogerzuber | 2:78dd1100a67b | 122 | /** |
rogerzuber | 2:78dd1100a67b | 123 | * Writes the desired state to the output on the shift register |
rogerzuber | 2:78dd1100a67b | 124 | * @param char output, state |
rogerzuber | 2:78dd1100a67b | 125 | */ |
rogerzuber | 2:78dd1100a67b | 126 | |
rogerzuber | 2:78dd1100a67b | 127 | void writeBitAtPos(unsigned char, bool); |
rogerzuber | 2:78dd1100a67b | 128 | |
rogerzuber | 2:78dd1100a67b | 129 | /** |
rogerzuber | 2:78dd1100a67b | 130 | * Writes the corresponding array item to the output on the shift register |
rogerzuber | 2:78dd1100a67b | 131 | * @param char array writes to the output from a state array |
rogerzuber | 2:78dd1100a67b | 132 | */ |
rogerzuber | 2:78dd1100a67b | 133 | |
rogerzuber | 2:78dd1100a67b | 134 | void writeArray(char[8]); |
rogerzuber | 2:78dd1100a67b | 135 | |
rogerzuber | 2:78dd1100a67b | 136 | protected: |
rogerzuber | 2:78dd1100a67b | 137 | void updateRegister(void); |
rogerzuber | 2:78dd1100a67b | 138 | void updateOutput(void); |
rogerzuber | 2:78dd1100a67b | 139 | void clearStateArray(void); |
rogerzuber | 2:78dd1100a67b | 140 | DigitalOut DSERIAL, LATCH, RCLK, SRCLK, RESET; |
rogerzuber | 2:78dd1100a67b | 141 | |
rogerzuber | 2:78dd1100a67b | 142 | }; |
rogerzuber | 2:78dd1100a67b | 143 | |
rogerzuber | 2:78dd1100a67b | 144 | #endif |