Production Test Program (PTP) for the LPC4088 Experiment Base Board
Dependencies: EALib I2S LM75B SDFileSystem mbed
Diff: TestShiftreg.cpp
- Revision:
- 2:2f4b7535ceb3
diff -r 47680ec5d783 -r 2f4b7535ceb3 TestShiftreg.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/TestShiftreg.cpp Thu Aug 28 09:36:13 2014 +0000 @@ -0,0 +1,80 @@ +/* + * Copyright 2013 Embedded Artists AB + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +/****************************************************************************** + * Includes + *****************************************************************************/ + +#include "mbed.h" +#include "TestShiftreg.h" + +/****************************************************************************** + * Defines and typedefs + *****************************************************************************/ + + +/****************************************************************************** + * Public Functions + *****************************************************************************/ + +TestShiftreg::TestShiftreg(PinName mosi, PinName miso, PinName sclk, PinName cs) : + _spi(mosi, miso, sclk), _cs(cs) { + + _cs = 1; // to get it in a known state + output(0x00); +} + +bool TestShiftreg::runTest() { + output(0x1); + wait(0.1); + output(0x2); + wait(0.1); + output(0x4); + wait(0.1); + output(0x8); + wait(0.1); + output(0x10); + wait(0.1); + output(0x20); + wait(0.1); + output(0x40); + wait(0.1); + output(0x80); + wait(0.1); + output(0x40); + wait(0.1); + output(0x20); + wait(0.1); + output(0x10); + wait(0.1); + output(0x8); + wait(0.1); + output(0x4); + wait(0.1); + output(0x2); + wait(0.1); + output(0x1); + wait(0.1); + output(0x0); + return true; +} + +void TestShiftreg::output(uint8_t value) { + _cs = 0; + _spi.write(value); + _cs = 1; +} +