diff options
Diffstat (limited to 'src/c/hardware/rasberrypi/libraries/wiringPi/mcp23x0817.h')
| -rw-r--r-- | src/c/hardware/rasberrypi/libraries/wiringPi/mcp23x0817.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/src/c/hardware/rasberrypi/libraries/wiringPi/mcp23x0817.h b/src/c/hardware/rasberrypi/libraries/wiringPi/mcp23x0817.h new file mode 100644 index 00000000..58bc0382 --- /dev/null +++ b/src/c/hardware/rasberrypi/libraries/wiringPi/mcp23x0817.h @@ -0,0 +1,87 @@ +/* + * mcp23xxx: + * Copyright (c) 2012-2013 Gordon Henderson + * + * Header file for code using the MCP23x08 and 17 GPIO expander + * chips. + * This comes in 2 flavours: MCP230xx (08/17) which has an I2C + * interface, and the MXP23Sxx (08/17) which has an SPI interface. + *********************************************************************** + * This file is part of wiringPi: + * https://projects.drogon.net/raspberry-pi/wiringpi/ + * + * wiringPi is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as + * published by the Free Software Foundation, either version 3 of the + * License, or (at your option) any later version. + * + * wiringPi 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 Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with wiringPi. + * If not, see <http://www.gnu.org/licenses/>. + *********************************************************************** + */ + +// MCP23x08 Registers + +#define MCP23x08_IODIR 0x00 +#define MCP23x08_IPOL 0x01 +#define MCP23x08_GPINTEN 0x02 +#define MCP23x08_DEFVAL 0x03 +#define MCP23x08_INTCON 0x04 +#define MCP23x08_IOCON 0x05 +#define MCP23x08_GPPU 0x06 +#define MCP23x08_INTF 0x07 +#define MCP23x08_INTCAP 0x08 +#define MCP23x08_GPIO 0x09 +#define MCP23x08_OLAT 0x0A + +// MCP23x17 Registers + +#define MCP23x17_IODIRA 0x00 +#define MCP23x17_IPOLA 0x02 +#define MCP23x17_GPINTENA 0x04 +#define MCP23x17_DEFVALA 0x06 +#define MCP23x17_INTCONA 0x08 +#define MCP23x17_IOCON 0x0A +#define MCP23x17_GPPUA 0x0C +#define MCP23x17_INTFA 0x0E +#define MCP23x17_INTCAPA 0x10 +#define MCP23x17_GPIOA 0x12 +#define MCP23x17_OLATA 0x14 + +#define MCP23x17_IODIRB 0x01 +#define MCP23x17_IPOLB 0x03 +#define MCP23x17_GPINTENB 0x05 +#define MCP23x17_DEFVALB 0x07 +#define MCP23x17_INTCONB 0x09 +#define MCP23x17_IOCONB 0x0B +#define MCP23x17_GPPUB 0x0D +#define MCP23x17_INTFB 0x0F +#define MCP23x17_INTCAPB 0x11 +#define MCP23x17_GPIOB 0x13 +#define MCP23x17_OLATB 0x15 + +// Bits in the IOCON register + +#define IOCON_UNUSED 0x01 +#define IOCON_INTPOL 0x02 +#define IOCON_ODR 0x04 +#define IOCON_HAEN 0x08 +#define IOCON_DISSLW 0x10 +#define IOCON_SEQOP 0x20 +#define IOCON_MIRROR 0x40 +#define IOCON_BANK_MODE 0x80 + +// Default initialisation mode + +#define IOCON_INIT (IOCON_SEQOP) + +// SPI Command codes + +#define CMD_WRITE 0x40 +#define CMD_READ 0x41 |