diff options
author | Trystan Jones <crenn6977@gmail.com> | 2012-06-29 06:51:18 +0000 |
---|---|---|
committer | Marti Bolivar <mbolivar@leaflabs.com> | 2012-06-29 12:31:20 -0400 |
commit | ab43e6240c8e5ecbc805e19d056bca8b9ee3b6ca (patch) | |
tree | 86a2317a4ed323cdae13ff4a153716a09e2722a4 /libraries/Wire/HardWire.cpp | |
parent | 6a6af3980a827a02e371968ec56271774ceb26ac (diff) | |
download | librambutan-ab43e6240c8e5ecbc805e19d056bca8b9ee3b6ca.tar.gz librambutan-ab43e6240c8e5ecbc805e19d056bca8b9ee3b6ca.zip |
Add new hard/soft Wire I2C library.
Added a generic pure abstract class to provide the interface for all
Wire implementations. Modified the old Wire library using software
interface to use the new Base Wire abstract class. Added a new
library which allows the use of the Wire class to use the I2C
hardware. Changed default pin numbers for Software Wire library to
match pin numbers used for I2C/TWI shields created for the Arduino.
Signed-off-by: Trystan Jones <crenn6977@gmail.com>
Diffstat (limited to 'libraries/Wire/HardWire.cpp')
-rw-r--r-- | libraries/Wire/HardWire.cpp | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/libraries/Wire/HardWire.cpp b/libraries/Wire/HardWire.cpp new file mode 100644 index 0000000..9176a87 --- /dev/null +++ b/libraries/Wire/HardWire.cpp @@ -0,0 +1,66 @@ +/****************************************************************************** + * The MIT License + * + * Copyright (c) 2010 LeafLabs LLC. + * + * Permission is hereby granted, free of charge, to any person + * obtaining a copy of this software and associated documentation + * files (the "Software"), to deal in the Software without + * restriction, including without limitation the rights to use, copy, + * modify, merge, publish, distribute, sublicense, and/or sell copies + * of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + *****************************************************************************/ + +/** + * @file HardWire.cpp + * @author Trystan Jones <crenn6977@gmail.com> + * @brief Wire library, uses the hardware I2C available in the Maple to + * interact with I2C slave devices. + */ + +/* + * Library created by crenn to use the new WireBase system and allow Arduino + * users easy interaction with the I2C Hardware in a familiar method. + */ + +#include "HardWire.h" + +uint8 HardWire::process() { + int8 res = i2c_master_xfer(sel_hard, &itc_msg, 1, 0); + if (res != 0) { + i2c_disable(sel_hard); + i2c_master_enable(sel_hard, (I2C_BUS_RESET | dev_flags)); + } + return 0; +} + +// TODO: Add in Error Handling if devsel is out of range for other Maples +HardWire::HardWire(uint8 dev_sel, uint8 flags) { + if (dev_sel == 1) { + sel_hard = I2C1; + } else if (dev_sel == 2) { + sel_hard = I2C2; + } else { + ASSERT(1); + } + dev_flags=flags; + i2c_master_enable(sel_hard, flags); +} + +HardWire::~HardWire() { + i2c_disable(sel_hard); + sel_hard = 0; +}
\ No newline at end of file |