-
Notifications
You must be signed in to change notification settings - Fork 29
/
mcp23016.h
122 lines (101 loc) · 4.58 KB
/
mcp23016.h
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
/*
___ _ _ _ __ ___ ___ | |_ ___ _ _
/ __|| | | || '_ ` _ \ / _ \ | __|/ _ \ | | | |
\__ \| |_| || | | | | || (_) || |_| (_) || |_| |
|___/ \__,_||_| |_| |_| \___/ \__|\___/ \__, |
|___/
gpio_expander - An attemp to create a fast and universal library for drive many GPIO chips
model: company: pins: protocol: Special Features:
---------------------------------------------------------------------------------------------------------------------
mcp23016 Microchip 16 I2C INT
---------------------------------------------------------------------------------------------------------------------
Version history:
0.5b1: first release, just coded and never tested
0.5b2: fixed 2wire version, added portPullup, tested output mode (ok)
0.5b3: added some drivers
0.5b4: ability to include library inside other libraries.
0.5b7: Changed functionalities of some function.
0.6b1: Changed gpioRegisterRead to gpioRegisterReadByte. Added gpioRegisterReadWord (for some GPIO)
0.8b3: Added 2 more commands and 2 gpio chip.
---------------------------------------------------------------------------------------------------------------------
Copyright (c) 2013-2014, s.u.m.o.t.o.y [sumotoy(at)gmail.com]
---------------------------------------------------------------------------------------------------------------------
gpio_expander Library is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
gpio_expander Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Foobar. If not, see <http://www.gnu.org/licenses/>.
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Version:0.8b3: Added 2 more commands and 2 gpio chip.
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
*/
/* ------------------------------ MCP23016 WIRING ------------------------------------
Basic Address: 00100 A2 A1 A0 (from 0x20 to 0x27)
A2,A1,A0 tied to ground = 0x20
__ __
GND [| U |] IOA-7
IOB-0 [| |] IOA-6
IOB-1 [| |] IOA-5
IOB-2 [| |] IOA-4
IOB-3 [| |] IOA-3
INT [| |] IOA-2
IOB-4 [| |] IOA-1
GND [| |] IOA-0
clk [| |] ++++
test pin [| |] GND
IOB-5 [| |] A2
IOB-6 [| |] A1
IOB-7 [| |] A0
scl [|_____|] sda
Note: test pin must be float!
*/
#ifndef _MCP23016_H_
#define _MCP23016_H_
#include <inttypes.h>
#include "gpio_expander.h"
class mcp23016 : public gpio_expander
{
public:
mcp23016(const uint8_t adrs);
mcp23016();
void postSetup(const uint8_t adrs);
virtual void begin(bool protocolInitOverride=false); //protocolInitOverride=true will not init the SPI
void gpioPinMode(uint16_t mode); //OUTPUT=all out,INPUT=all in,0xxxx=you choose
void gpioPinMode(uint8_t pin, bool mode); //set a unique pin as IN(1) or OUT (0)
void gpioPort(uint16_t value); //HIGH=all Hi, LOW=all Low,0xxxx=you choose witch low or hi
void gpioPort(byte lowByte, byte highByte); //same as abowe but uses 2 separate bytes
uint16_t readGpioPort(); //read the state of the pins (all)
uint16_t readGpioPortFast();
void gpioDigitalWrite(uint8_t pin, bool value); //write data to one pin
void gpioDigitalWriteFast(uint8_t pin, bool value);
int gpioDigitalRead(uint8_t pin); //read data from one pin
uint8_t gpioRegisterReadByte(byte reg); //read a byte from chip register
uint16_t gpioRegisterReadWord(byte reg); //read a word from chip register
int gpioDigitalReadFast(uint8_t pin);
void gpioRegisterWriteByte(byte reg,byte data); //write a byte in a chip register
void gpioRegisterWriteWord(byte reg,word data); //write a word in a chip register
//void portPullup(uint16_t data); // HIGH=all pullup, LOW=all pulldown,0xxxx=you choose witch
void gpioPortUpdate();
// direct access commands
uint16_t readAddress(byte addr);
//------------------------- REGISTERS
byte IOCON;
byte IODIR;
byte GPIO;
byte IPOL;
byte INTCAP;
byte OLAT;
private:
uint8_t _adrs;
uint16_t _gpioDirection;
uint16_t _gpioState;
bool _error;
void writeByte(byte addr, byte data);
void writeWord(byte addr, uint16_t data);
};
#endif