diff --git a/devLib/piFaceOld.c b/devLib/piFaceOld.c deleted file mode 100644 index 1b1c0dd..0000000 --- a/devLib/piFaceOld.c +++ /dev/null @@ -1,178 +0,0 @@ -/* - * piFace.: - * Arduino compatable (ish) Wiring library for the Raspberry Pi - * Copyright (c) 2012-2013 Gordon Henderson - * - * This file to interface with the PiFace peripheral device which - * has an MCP23S17 GPIO device connected via the SPI bus. - *********************************************************************** - * 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 . - *********************************************************************** - */ - - -#include -#include - -#include -#include - -#include "../wiringPi/mcp23x0817.h" - -#include "piFace.h" - -#define PIFACE_SPEED 4000000 -#define PIFACE_DEVNO 0 - - - -/* - * writeByte: - * Write a byte to a register on the MCP23S17 on the SPI bus. - ********************************************************************************* - */ - -static void writeByte (uint8_t reg, uint8_t data) -{ - uint8_t spiData [4] ; - - spiData [0] = CMD_WRITE ; - spiData [1] = reg ; - spiData [2] = data ; - - wiringPiSPIDataRW (PIFACE_DEVNO, spiData, 3) ; -} - -/* - * readByte: - * Read a byte from a register on the MCP23S17 on the SPI bus. - ********************************************************************************* - */ - -static uint8_t readByte (uint8_t reg) -{ - uint8_t spiData [4] ; - - spiData [0] = CMD_READ ; - spiData [1] = reg ; - - wiringPiSPIDataRW (PIFACE_DEVNO, spiData, 3) ; - - return spiData [2] ; -} - - -/* - * myDigitalWrite: - * Perform the digitalWrite function on the PiFace board - ********************************************************************************* - */ - -void myDigitalWrite (struct wiringPiNodeStruct *node, int pin, int value) -{ - uint8_t mask, old ; - - pin -= node->pinBase ; - mask = 1 << pin ; - old = readByte (MCP23x17_GPIOA) ; - - if (value == 0) - old &= (~mask) ; - else - old |= mask ; - - writeByte (MCP23x17_GPIOA, old) ; -} - - -/* - * myDigitalRead: - * Perform the digitalRead function on the PiFace board - ********************************************************************************* - */ - -int myDigitalRead (struct wiringPiNodeStruct *node, int pin) -{ - uint8_t mask, reg ; - - mask = 1 << ((pin - node->pinBase) & 7) ; - - if (pin < 8) - reg = MCP23x17_GPIOB ; // Input regsiter - else - reg = MCP23x17_OLATA ; // Output latch regsiter - - if ((readByte (reg) & mask) != 0) - return HIGH ; - else - return LOW ; -} - - -/* - * myPullUpDnControl: - * Perform the pullUpDnControl function on the PiFace board - ********************************************************************************* - */ - -void myPullUpDnControl (struct wiringPiNodeStruct *node, int pin, int pud) -{ - uint8_t mask, old ; - - mask = 1 << (pin - node->pinBase) ; - old = readByte (MCP23x17_GPPUB) ; - - if (pud == 0) - old &= (~mask) ; - else - old |= mask ; - - writeByte (MCP23x17_GPPUB, old) ; -} - - -/* - * piFaceSetup - * Setup the SPI interface and initialise the MCP23S17 chip - * We create one node with 16 pins - each if the first 8 pins being read - * and write - although the operations actually go to different - * hardware ports. The top 8 let you read the state of the output register. - ********************************************************************************* - */ - -int piFaceSetup (const int pinBase) -{ - int x ; - struct wiringPiNodeStruct *node ; - - if ((x = wiringPiSPISetup (PIFACE_DEVNO, PIFACE_SPEED)) < 0) - return x ; - -// Setup the MCP23S17 - - writeByte (MCP23x17_IOCON, IOCON_INIT) ; - writeByte (MCP23x17_IODIRA, 0x00) ; // Port A -> Outputs - writeByte (MCP23x17_IODIRB, 0xFF) ; // Port B -> Inputs - - node = wiringPiNewNode (pinBase, 16) ; - node->digitalRead = myDigitalRead ; - node->digitalWrite = myDigitalWrite ; - node->pullUpDnControl = myPullUpDnControl ; - - return 0 ; -}