Sample Code
OSX Driver and Kext Samples/ Deva_Example/ Deva_Example/ deva.c/
/* File: deva.c Abstract: n/a Version: 1.0 Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Inc. ("Apple") in consideration of your agreement to the following terms, and your use, installation, modification or redistribution of this Apple software constitutes acceptance of these terms. If you do not agree with these terms, please do not use, install, modify or redistribute this Apple software. In consideration of your agreement to abide by the following terms, and subject to these terms, Apple grants you a personal, non-exclusive license, under Apple's copyrights in this original Apple software (the "Apple Software"), to use, reproduce, modify and redistribute the Apple Software, with or without modifications, in source and/or binary forms; provided that if you redistribute the Apple Software in its entirety and without modifications, you must retain this notice and the following text and disclaimers in all such redistributions of the Apple Software. Neither the name, trademarks, service marks or logos of Apple Inc. may be used to endorse or promote products derived from the Apple Software without specific prior written permission from Apple. Except as expressly stated in this notice, no other rights or licenses, express or implied, are granted by Apple herein, including but not limited to any patent rights that may be infringed by your derivative works or by other works in which the Apple Software may be incorporated. The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS. IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. Copyright (C) 2009 Apple Inc. All Rights Reserved. */ // Some functions to talk to the DevaSys <http://www.devasys.com> "USB I2C/IO,� Interface Board" // These come in 2 flavors DevaFuncName and DevaFuncNameD. The two sets are functionally identical // but take either a device (USBDeviceInterface) object (the "D" functions // or an Interface (USBInterfaceInterface) object to work on. // // Currently defined functions are: // // IOReturn DevaSetIoPortsConfig(IOUSBDeviceInterface245 **dev, UInt32 portBits); // IOReturn DevaReadIoPorts(IOUSBDeviceInterface245 **dev, UInt32 *portBits); // IOReturn DevaWriteIoPorts(IOUSBDeviceInterface245 **dev, UInt32 portBits, UInt32 mask); // // They operate on the 20 programmable IO bits which appear on the IO connector. // The port bits are mapped as 0x000CBBAA (with the 4 C bits shifted down 4 bits) // // DevaSetIoPortsConfig sets the 20 programmable IO ports to either Input or Output. // Bits which are 0 are configured as output, bits which are 1 are configured as // Input. (Mneumonic, 0 looks like 'O', 1 looks like "I".) // // DevaReadIoPorts reads the state of the IO pins. The state of both inputs and // outputs are read. Outputs should reflect the state they were last set to // (unless you have an horrendous load on them). // // DevaWriteIoPorts sets the state of any output bits. Only bits which have // their corresponding mask bit set are affected, and of course only bits // which had previously been configured as output can do anything. // // if you set the symbol NARRATEIO to non zero, a message will be printed for // every IO attempt. #include <IOKit/IOCFPlugIn.h> #include <IOKit/usb/IOUSBLib.h> #include "deva.h" #include "printInterpretedError.h" #include <stdio.h> #define NARRATEIO 1 IOReturn DevaSetIoPortsConfig(IOUSBInterfaceInterface245 **intf, UInt32 portBits) { IOUSBDevRequest req; IOReturn err; req.bmRequestType = USBmakebmRequestType(kUSBOut, kUSBVendor, kUSBDevice); req.bRequest = 0xF0; // SetIoPortsConfig req.wValue = 0; // unused req.wIndex = 0; // unused req.wLength = 4; // 32bit int req.pData = &portBits; portBits = HostToUSBLong(portBits); // 000CBBAA <-port mappings // 1 is Input (looks like I, 0 is output, looks like O) #if NARRATEIO printf("Doing SetIoPortsConfig with portbits %08x\n", USBToHostLong(portBits)); #endif err = (*intf)->ControlRequest(intf, 0, &req); if (kIOReturnSuccess == err) { if(req.wLenDone != 4) { err = kIOReturnUnderrun; } } return(err); } IOReturn DevaReadIoPorts(IOUSBInterfaceInterface245 **intf, UInt32 *portBits) { IOUSBDevRequest req; IOReturn err; req.bmRequestType = USBmakebmRequestType(kUSBIn, kUSBVendor, kUSBDevice); req.bRequest = 0xF1; // ReadIoPorts req.wValue = 0; // unused req.wIndex = 0; // unused req.wLength = 4; // 32bit int req.pData = portBits; *portBits = -1; // 000CBBAA <-port mappings // 1 is Input (looks like I, 0 is output, looks like O) #if NARRATEIO printf("Doing ReadIoPorts with portbits %08x\n", USBToHostLong(*portBits)); #endif err = (*intf)->ControlRequest(intf, 0, &req); if (kIOReturnSuccess == err) { if(req.wLenDone != 4) { err = kIOReturnUnderrun; } else { *portBits = USBToHostLong(*portBits); } } return(err); } IOReturn DevaWriteIoPorts(IOUSBInterfaceInterface245 **intf, UInt32 portBits, UInt32 mask) { struct { UInt32 portBits; UInt32 maskBits; }writeBits; IOUSBDevRequest req; IOReturn err; req.bmRequestType = USBmakebmRequestType(kUSBOut, kUSBVendor, kUSBDevice); req.bRequest = 0xF1; // WriteIoPorts req.wValue = 0; // unused req.wIndex = 0; // unused req.wLength = 8; // 32bit int req.pData = &writeBits; writeBits.portBits = HostToUSBLong(portBits); writeBits.maskBits = HostToUSBLong(mask); // 000CBBAA <-port mappings // 1 is Input (looks like I, 0 is output, looks like O) #if NARRATEIO printf("Doing WriteIoPorts with portbits %08x, %08x\n", USBToHostLong(writeBits.portBits), USBToHostLong(writeBits.maskBits)); #endif err = (*intf)->ControlRequest(intf, 0, &req); if (kIOReturnSuccess == err) { if(req.wLenDone != 8) { err = kIOReturnUnderrun; } } return(err); } IOReturn DevaSetIoPortsConfigD(IOUSBDeviceInterface245 **dev, UInt32 portBits) { IOUSBDevRequest req; IOReturn err; req.bmRequestType = USBmakebmRequestType(kUSBOut, kUSBVendor, kUSBDevice); req.bRequest = 0xF0; // SetIoPortsConfig req.wValue = 0; // unused req.wIndex = 0; // unused req.wLength = 4; // 32bit int req.pData = &portBits; portBits = HostToUSBLong(portBits); // 000CBBAA <-port mappings // 1 is Input (looks like I, 0 is output, looks like O) #if NARRATEIO printf("Doing SetIoPortsConfigD with portbits %08x\n", USBToHostLong(portBits)); #endif err = (*dev)->DeviceRequest(dev, &req); if (kIOReturnSuccess == err) { if(req.wLenDone != 4) { err = kIOReturnUnderrun; } } return(err); } IOReturn DevaReadIoPortsD(IOUSBDeviceInterface245 **dev, UInt32 *portBits) { IOUSBDevRequest req; IOReturn err; req.bmRequestType = USBmakebmRequestType(kUSBIn, kUSBVendor, kUSBDevice); req.bRequest = 0xF1; // ReadIoPorts req.wValue = 0; // unused req.wIndex = 0; // unused req.wLength = 4; // 32bit int req.pData = portBits; *portBits = -1; // 000CBBAA <-port mappings // 1 is Input (looks like I, 0 is output, looks like O) #if NARRATEIO printf("Doing ReadIoPortsD with portbits %08x\n", USBToHostLong(*portBits)); #endif err = (*dev)->DeviceRequest(dev, &req); if (kIOReturnSuccess == err) { if(req.wLenDone != 4) { err = kIOReturnUnderrun; } else { *portBits = USBToHostLong(*portBits); } } return(err); } IOReturn DevaWriteIoPortsD(IOUSBDeviceInterface245 **dev, UInt32 portBits, UInt32 mask) { struct { UInt32 portBits; UInt32 maskBits; }writeBits; IOUSBDevRequest req; IOReturn err; req.bmRequestType = USBmakebmRequestType(kUSBOut, kUSBVendor, kUSBDevice); req.bRequest = 0xF1; // WriteIoPorts req.wValue = 0; // unused req.wIndex = 0; // unused req.wLength = 8; // 32bit int req.pData = &writeBits; writeBits.portBits = HostToUSBLong(portBits); writeBits.maskBits = HostToUSBLong(mask); // 000CBBAA <-port mappings // 1 is Input (looks like I, 0 is output, looks like O) #if NARRATEIO printf("Doing WriteIoPortsD with portbits %08x, %08x\n", USBToHostLong(writeBits.portBits), USBToHostLong(writeBits.maskBits)); #endif err = (*dev)->DeviceRequest(dev, &req); if (kIOReturnSuccess == err) { if(req.wLenDone != 8) { err = kIOReturnUnderrun; } } return(err); }
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