Developing Library for the MAX7314 I2C 16-bit I/O Expander w/ PWM
Dependencies: mbed PCA9538_Expander
MAX7314.cpp@0:7e32b01354d3, 2011-04-13 (annotated)
- Committer:
- uasenden
- Date:
- Wed Apr 13 23:17:22 2011 +0000
- Revision:
- 0:7e32b01354d3
Rev 0
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
uasenden | 0:7e32b01354d3 | 1 | /* |
uasenden | 0:7e32b01354d3 | 2 | |
uasenden | 0:7e32b01354d3 | 3 | MAX7314.cpp |
uasenden | 0:7e32b01354d3 | 4 | |
uasenden | 0:7e32b01354d3 | 5 | Library implementation file for the MAX7314 16-bit I/O Expander with PWM |
uasenden | 0:7e32b01354d3 | 6 | |
uasenden | 0:7e32b01354d3 | 7 | Tom Gambone |
uasenden | 0:7e32b01354d3 | 8 | Chad Joppeck |
uasenden | 0:7e32b01354d3 | 9 | |
uasenden | 0:7e32b01354d3 | 10 | Based on code by mBed user: "Ale C.-" / Suky (PCA9538_Expander Library) |
uasenden | 0:7e32b01354d3 | 11 | |
uasenden | 0:7e32b01354d3 | 12 | 4/13/2011 - Initial porting |
uasenden | 0:7e32b01354d3 | 13 | |
uasenden | 0:7e32b01354d3 | 14 | */ |
uasenden | 0:7e32b01354d3 | 15 | |
uasenden | 0:7e32b01354d3 | 16 | #include "mbed.h" |
uasenden | 0:7e32b01354d3 | 17 | |
uasenden | 0:7e32b01354d3 | 18 | |
uasenden | 0:7e32b01354d3 | 19 | |
uasenden | 0:7e32b01354d3 | 20 | |
uasenden | 0:7e32b01354d3 | 21 | //***************************************************************************** |
uasenden | 0:7e32b01354d3 | 22 | |
uasenden | 0:7e32b01354d3 | 23 | |
uasenden | 0:7e32b01354d3 | 24 | |
uasenden | 0:7e32b01354d3 | 25 | MAX7314_OutputPin::MAX7314_OutputPin(ExpPinName Pin,PinName PIN_SDA,PinName PIN_SCL,unsigned char Address) |
uasenden | 0:7e32b01354d3 | 26 | :Bus(PIN_SDA,PIN_SCL),_Pin(Pin),_Address(Address<<1) { |
uasenden | 0:7e32b01354d3 | 27 | |
uasenden | 0:7e32b01354d3 | 28 | unsigned char Temp; |
uasenden | 0:7e32b01354d3 | 29 | |
uasenden | 0:7e32b01354d3 | 30 | Bus.start(); |
uasenden | 0:7e32b01354d3 | 31 | Bus.write(_Address & 0xFE); |
uasenden | 0:7e32b01354d3 | 32 | Bus.write(0x03); |
uasenden | 0:7e32b01354d3 | 33 | Bus.start(); |
uasenden | 0:7e32b01354d3 | 34 | Bus.write(_Address | 0x01); |
uasenden | 0:7e32b01354d3 | 35 | Temp=Bus.read(0); |
uasenden | 0:7e32b01354d3 | 36 | Bus.stop(); |
uasenden | 0:7e32b01354d3 | 37 | |
uasenden | 0:7e32b01354d3 | 38 | Bus.start(); |
uasenden | 0:7e32b01354d3 | 39 | Bus.write(_Address & 0xFE); |
uasenden | 0:7e32b01354d3 | 40 | Bus.write(0x03); |
uasenden | 0:7e32b01354d3 | 41 | Bus.write((~(0x01<<_Pin))&Temp); |
uasenden | 0:7e32b01354d3 | 42 | Bus.stop(); |
uasenden | 0:7e32b01354d3 | 43 | } |
uasenden | 0:7e32b01354d3 | 44 | |
uasenden | 0:7e32b01354d3 | 45 | void MAX7314_OutputPin::vWrite(int value) { |
uasenden | 0:7e32b01354d3 | 46 | unsigned char Temp; |
uasenden | 0:7e32b01354d3 | 47 | |
uasenden | 0:7e32b01354d3 | 48 | Bus.start(); |
uasenden | 0:7e32b01354d3 | 49 | Bus.write(_Address & 0xFE); |
uasenden | 0:7e32b01354d3 | 50 | Bus.write(0x01); |
uasenden | 0:7e32b01354d3 | 51 | Bus.start(); |
uasenden | 0:7e32b01354d3 | 52 | Bus.write(_Address | 0x01); |
uasenden | 0:7e32b01354d3 | 53 | Temp=Bus.read(0); |
uasenden | 0:7e32b01354d3 | 54 | Bus.stop(); |
uasenden | 0:7e32b01354d3 | 55 | |
uasenden | 0:7e32b01354d3 | 56 | Bus.start(); |
uasenden | 0:7e32b01354d3 | 57 | Bus.write(_Address & 0xFE); |
uasenden | 0:7e32b01354d3 | 58 | Bus.write(0x01); |
uasenden | 0:7e32b01354d3 | 59 | if (value==0) { |
uasenden | 0:7e32b01354d3 | 60 | Bus.write((~(0x01<<_Pin))&Temp); |
uasenden | 0:7e32b01354d3 | 61 | } else { |
uasenden | 0:7e32b01354d3 | 62 | Bus.write((0x01<<_Pin)|Temp); |
uasenden | 0:7e32b01354d3 | 63 | } |
uasenden | 0:7e32b01354d3 | 64 | Bus.stop(); |
uasenden | 0:7e32b01354d3 | 65 | } |
uasenden | 0:7e32b01354d3 | 66 | |
uasenden | 0:7e32b01354d3 | 67 | int MAX7314_OutputPin::read() { |
uasenden | 0:7e32b01354d3 | 68 | unsigned char Temp; |
uasenden | 0:7e32b01354d3 | 69 | |
uasenden | 0:7e32b01354d3 | 70 | Bus.start(); |
uasenden | 0:7e32b01354d3 | 71 | Bus.write(_Address & 0xFE); |
uasenden | 0:7e32b01354d3 | 72 | Bus.write(0x01); |
uasenden | 0:7e32b01354d3 | 73 | Bus.start(); |
uasenden | 0:7e32b01354d3 | 74 | Bus.write(_Address | 0x01); |
uasenden | 0:7e32b01354d3 | 75 | Temp=Bus.read(0); |
uasenden | 0:7e32b01354d3 | 76 | Bus.stop(); |
uasenden | 0:7e32b01354d3 | 77 | |
uasenden | 0:7e32b01354d3 | 78 | return((Temp>>_Pin)&0x01); |
uasenden | 0:7e32b01354d3 | 79 | } |
uasenden | 0:7e32b01354d3 | 80 | |
uasenden | 0:7e32b01354d3 | 81 | MAX7314_OutputPin& MAX7314_OutputPin::operator= (int value) { |
uasenden | 0:7e32b01354d3 | 82 | vWrite(value); |
uasenden | 0:7e32b01354d3 | 83 | } |
uasenden | 0:7e32b01354d3 | 84 | |
uasenden | 0:7e32b01354d3 | 85 | MAX7314_OutputPin::operator int() { |
uasenden | 0:7e32b01354d3 | 86 | |
uasenden | 0:7e32b01354d3 | 87 | return(read()); |
uasenden | 0:7e32b01354d3 | 88 | } |
uasenden | 0:7e32b01354d3 | 89 | |
uasenden | 0:7e32b01354d3 | 90 | |
uasenden | 0:7e32b01354d3 | 91 | |
uasenden | 0:7e32b01354d3 | 92 | //***************************************************************************** |
uasenden | 0:7e32b01354d3 | 93 | |
uasenden | 0:7e32b01354d3 | 94 | |
uasenden | 0:7e32b01354d3 | 95 | |
uasenden | 0:7e32b01354d3 | 96 | MAX7314_InputPin::MAX7314_InputPin(ExpPinName Pin,PinName PIN_SDA,PinName PIN_SCL,unsigned char Address) |
uasenden | 0:7e32b01354d3 | 97 | :Bus(PIN_SDA,PIN_SCL),_Pin(Pin),_Address(Address<<1) { |
uasenden | 0:7e32b01354d3 | 98 | unsigned char Temp; |
uasenden | 0:7e32b01354d3 | 99 | |
uasenden | 0:7e32b01354d3 | 100 | Bus.start(); |
uasenden | 0:7e32b01354d3 | 101 | Bus.write(_Address & 0xFE); |
uasenden | 0:7e32b01354d3 | 102 | Bus.write(0x03); |
uasenden | 0:7e32b01354d3 | 103 | Bus.start(); |
uasenden | 0:7e32b01354d3 | 104 | Bus.write(_Address | 0x01); |
uasenden | 0:7e32b01354d3 | 105 | Temp=Bus.read(0); |
uasenden | 0:7e32b01354d3 | 106 | Bus.stop(); |
uasenden | 0:7e32b01354d3 | 107 | |
uasenden | 0:7e32b01354d3 | 108 | Bus.start(); |
uasenden | 0:7e32b01354d3 | 109 | Bus.write(_Address & 0xFE); |
uasenden | 0:7e32b01354d3 | 110 | Bus.write(0x03); |
uasenden | 0:7e32b01354d3 | 111 | Bus.write((0x01<<_Pin)|Temp); |
uasenden | 0:7e32b01354d3 | 112 | Bus.stop(); |
uasenden | 0:7e32b01354d3 | 113 | } |
uasenden | 0:7e32b01354d3 | 114 | |
uasenden | 0:7e32b01354d3 | 115 | int MAX7314_InputPin::read() { |
uasenden | 0:7e32b01354d3 | 116 | unsigned char Temp; |
uasenden | 0:7e32b01354d3 | 117 | |
uasenden | 0:7e32b01354d3 | 118 | Bus.start(); |
uasenden | 0:7e32b01354d3 | 119 | Bus.write(_Address & 0xFE); |
uasenden | 0:7e32b01354d3 | 120 | Bus.write(0x00); |
uasenden | 0:7e32b01354d3 | 121 | Bus.start(); |
uasenden | 0:7e32b01354d3 | 122 | Bus.write(_Address | 0x01); |
uasenden | 0:7e32b01354d3 | 123 | Temp=Bus.read(0); |
uasenden | 0:7e32b01354d3 | 124 | Bus.stop(); |
uasenden | 0:7e32b01354d3 | 125 | |
uasenden | 0:7e32b01354d3 | 126 | return((Temp>>_Pin)&0x01); |
uasenden | 0:7e32b01354d3 | 127 | } |
uasenden | 0:7e32b01354d3 | 128 | |
uasenden | 0:7e32b01354d3 | 129 | MAX7314_InputPin::operator int() { |
uasenden | 0:7e32b01354d3 | 130 | |
uasenden | 0:7e32b01354d3 | 131 | return(read()); |
uasenden | 0:7e32b01354d3 | 132 | } |
uasenden | 0:7e32b01354d3 | 133 | |
uasenden | 0:7e32b01354d3 | 134 | |
uasenden | 0:7e32b01354d3 | 135 | |
uasenden | 0:7e32b01354d3 | 136 | //***************************************************************************** |
uasenden | 0:7e32b01354d3 | 137 | |
uasenden | 0:7e32b01354d3 | 138 | |
uasenden | 0:7e32b01354d3 | 139 | |
uasenden | 0:7e32b01354d3 | 140 | MAX7314::MAX7314(PinName PIN_SDA,PinName PIN_SCL,unsigned char Address,PinName PIN_INT) |
uasenden | 0:7e32b01354d3 | 141 | : Bus(PIN_SDA,PIN_SCL),_PIN_INT(PIN_INT),MAX7314_Event(PIN_INT) { |
uasenden | 0:7e32b01354d3 | 142 | _Address=Address<<1; |
uasenden | 0:7e32b01354d3 | 143 | } |
uasenden | 0:7e32b01354d3 | 144 | |
uasenden | 0:7e32b01354d3 | 145 | void MAX7314::vInit(unsigned char Dir,void (*fptr)(void)) { |
uasenden | 0:7e32b01354d3 | 146 | |
uasenden | 0:7e32b01354d3 | 147 | //Bus.frequency(400000); |
uasenden | 0:7e32b01354d3 | 148 | |
uasenden | 0:7e32b01354d3 | 149 | Bus.start(); |
uasenden | 0:7e32b01354d3 | 150 | Bus.write(_Address & 0xFE); |
uasenden | 0:7e32b01354d3 | 151 | Bus.write(0x03); |
uasenden | 0:7e32b01354d3 | 152 | Bus.write(Dir); |
uasenden | 0:7e32b01354d3 | 153 | Bus.stop(); |
uasenden | 0:7e32b01354d3 | 154 | |
uasenden | 0:7e32b01354d3 | 155 | if (fptr!=NULL) { |
uasenden | 0:7e32b01354d3 | 156 | MAX7314_Event.fall(fptr); |
uasenden | 0:7e32b01354d3 | 157 | } |
uasenden | 0:7e32b01354d3 | 158 | } |
uasenden | 0:7e32b01354d3 | 159 | |
uasenden | 0:7e32b01354d3 | 160 | void MAX7314::vSetConfiguration(unsigned char Dir) { |
uasenden | 0:7e32b01354d3 | 161 | |
uasenden | 0:7e32b01354d3 | 162 | Bus.start(); |
uasenden | 0:7e32b01354d3 | 163 | Bus.write(_Address & 0xFE); |
uasenden | 0:7e32b01354d3 | 164 | Bus.write(0x03); |
uasenden | 0:7e32b01354d3 | 165 | Bus.write(Dir); |
uasenden | 0:7e32b01354d3 | 166 | Bus.stop(); |
uasenden | 0:7e32b01354d3 | 167 | } |
uasenden | 0:7e32b01354d3 | 168 | |
uasenden | 0:7e32b01354d3 | 169 | void MAX7314::vSetPolarity(unsigned char Pol) { |
uasenden | 0:7e32b01354d3 | 170 | |
uasenden | 0:7e32b01354d3 | 171 | Bus.start(); |
uasenden | 0:7e32b01354d3 | 172 | Bus.write(_Address & 0xFE); |
uasenden | 0:7e32b01354d3 | 173 | Bus.write(0x02); |
uasenden | 0:7e32b01354d3 | 174 | Bus.write(Pol); |
uasenden | 0:7e32b01354d3 | 175 | Bus.stop(); |
uasenden | 0:7e32b01354d3 | 176 | } |
uasenden | 0:7e32b01354d3 | 177 | |
uasenden | 0:7e32b01354d3 | 178 | unsigned char MAX7314::cRead(void) { |
uasenden | 0:7e32b01354d3 | 179 | unsigned char Temp; |
uasenden | 0:7e32b01354d3 | 180 | |
uasenden | 0:7e32b01354d3 | 181 | Bus.start(); |
uasenden | 0:7e32b01354d3 | 182 | Bus.write(_Address & 0xFE); |
uasenden | 0:7e32b01354d3 | 183 | Bus.write(0x00); |
uasenden | 0:7e32b01354d3 | 184 | Bus.start(); |
uasenden | 0:7e32b01354d3 | 185 | Bus.write(_Address | 0x01); |
uasenden | 0:7e32b01354d3 | 186 | Temp=Bus.read(0); |
uasenden | 0:7e32b01354d3 | 187 | Bus.stop(); |
uasenden | 0:7e32b01354d3 | 188 | |
uasenden | 0:7e32b01354d3 | 189 | return(Temp); |
uasenden | 0:7e32b01354d3 | 190 | } |
uasenden | 0:7e32b01354d3 | 191 | |
uasenden | 0:7e32b01354d3 | 192 | void MAX7314::vWrite(unsigned char Data) { |
uasenden | 0:7e32b01354d3 | 193 | |
uasenden | 0:7e32b01354d3 | 194 | Bus.start(); |
uasenden | 0:7e32b01354d3 | 195 | Bus.write(_Address & 0xFE); |
uasenden | 0:7e32b01354d3 | 196 | Bus.write(0x01); |
uasenden | 0:7e32b01354d3 | 197 | Bus.write(Data); |
uasenden | 0:7e32b01354d3 | 198 | Bus.stop(); |
uasenden | 0:7e32b01354d3 | 199 | } |
uasenden | 0:7e32b01354d3 | 200 | |
uasenden | 0:7e32b01354d3 | 201 | void MAX7314::vEnableSetInterrupt(void (*fptr)(void)) { |
uasenden | 0:7e32b01354d3 | 202 | MAX7314_Event.fall(fptr); |
uasenden | 0:7e32b01354d3 | 203 | } |
uasenden | 0:7e32b01354d3 | 204 | |
uasenden | 0:7e32b01354d3 | 205 | void MAX7314::vDisableInterrupt(void) { |
uasenden | 0:7e32b01354d3 | 206 | MAX7314_Event.fall(NULL); |
uasenden | 0:7e32b01354d3 | 207 | } |
uasenden | 0:7e32b01354d3 | 208 | |
uasenden | 0:7e32b01354d3 | 209 | bool MAX7314::bReadPinINT(void) { |
uasenden | 0:7e32b01354d3 | 210 | return(_PIN_INT); |
uasenden | 0:7e32b01354d3 | 211 | } |