testAPI.cpp

00001 /*
00002  * testAPI.cpp
00003  *
00004  *  Created on: Feb 3, 2017
00005  *      Author: mbriggs
00006  */
00007 #include "mbed.h"
00008 #include "greentea-client/test_env.h"
00009 #include "unity.h"
00010 #include "utest.h"
00011 #include "rtos.h"
00012 
00013 // API under test
00014 #include "DS2408.h"
00015 
00016 #define __TEST__ 1
00017 
00018 #define USE_RELIABLE 1
00019 
00020 using namespace utest::v1;
00021 
00022 DigitalOut switchedIO(I2C_SCL, 0); // Always enable Switched IO for test
00023 OneWire OWMaster(I2C_SDA);
00024 uint8_t ds2408Addr[8];
00025 
00026 /**
00027  * A test that the OneWire Device is on the bus.  If not all other tests will fail.
00028  */
00029 void test_search() {
00030     uint8_t result;
00031     for (int i=0; i<10; i++) {
00032         OWMaster.reset();
00033         OWMaster.reset_search(); // TODO Check if this is helpful
00034         wait(1.0);
00035         result = OWMaster.search(ds2408Addr);
00036         if (result == 1) {
00037             break;
00038         }
00039     }
00040     TEST_ASSERT(result == 1);
00041 }
00042 
00043 /**
00044  * Checks that in idle state all the IOs are pulled up.
00045  */
00046 void test_idle_state() {
00047     DS2408 ds2408(&OWMaster, ds2408Addr);
00048     CmdResult result;
00049 
00050     #ifdef USE_RELIABLE
00051     result = ds2408.pioLogicReliableWrite(0xFF); // Leave all IOs high Z e.g. should float high
00052     #else
00053     result = ds2408.pioLogicWrite(0xFF); // Leave all IOs high Z e.g. should float high
00054     #endif
00055     TEST_ASSERT_MESSAGE(result == cmdSuccess, "Error returned during write operation");
00056 
00057     uint8_t val = 0;
00058     #ifdef USE_RELIABLE
00059     result = ds2408.pioLogicReliableRead(val);
00060     #else
00061     result = ds2408.pioLogicRead(val);
00062     #endif
00063     TEST_ASSERT_MESSAGE(result == cmdSuccess, "Error returned during read operation");
00064     TEST_ASSERT_MESSAGE(val == 0xFF, "Bits not correct");
00065 }
00066 
00067 /**
00068  * This test walks a zero bit for ds2408.  Note this requires a ds2408 with all
00069  * IOs pulled up since each will pulled low in sequence.
00070  */
00071 void test_walk_the_zero() {
00072     DS2408 ds2408(&OWMaster, ds2408Addr);
00073 
00074     #ifdef USE_RELIABLE
00075     result = ds2408.pioLogicReliableWrite(0xFF); // Leave all IOs high Z e.g. should float high
00076     #else
00077     result = ds2408.pioLogicWrite(0xFF); // Leave all IOs high Z e.g. should float high
00078     #endif
00079     TEST_ASSERT_MESSAGE(result == cmdSuccess, "Error returned during write operation");
00080 
00081     uint8_t readVal = 0;
00082     #ifdef USE_RELIABLE
00083     result = ds2408.pioLogicReliableRead(readVal);
00084     #else
00085     result = ds2408.pioLogicRead(readVal);
00086     #endif
00087     TEST_ASSERT_MESSAGE(result == cmdSuccess, "Error returned during read operation");
00088     TEST_ASSERT_MESSAGE(readVal == 0xFF, "Bits not correct");
00089 
00090     uint8_t writeVal;
00091     for (int i=0; i<8; i++) {
00092         writeVal = ~(1 << i);
00093         #ifdef USE_RELIABLE
00094         result = ds2408.pioLogicReliableWrite(writeVal); // Leave all IOs high Z e.g. should float high
00095         #else
00096         result = ds2408.pioLogicWrite(writeVal); // Leave all IOs high Z e.g. should float high
00097         #endif
00098         TEST_ASSERT_MESSAGE(result == cmdSuccess, "Error returned during write operation");
00099 
00100         #ifdef USE_RELIABLE
00101         result = ds2408.pioLogicReliableRead(readVal);
00102         #else
00103         result = ds2408.pioLogicRead(readVal);
00104         #endif
00105         TEST_ASSERT_MESSAGE(result == cmdSuccess, "Error returned during read operation");
00106         TEST_ASSERT_MESSAGE(readVal == writeVal, "Bits not correct");
00107     }
00108 }
00109 
00110 
00111 utest::v1::status_t test_setup(const size_t number_of_cases) {
00112     // Setup Greentea using a reasonable timeout in seconds
00113     GREENTEA_SETUP(40, "default_auto");
00114     return verbose_test_setup_handler(number_of_cases);
00115 }
00116 
00117 // Test cases
00118 Case cases[] = {
00119     Case("Testing search", test_search),
00120 //    Case("Testing init", test_init),
00121     Case("Testing idle state", test_idle_state),
00122     Case("Test walking the zero", test_walk_the_zero)
00123 };
00124 
00125 Specification specification(test_setup, cases);
00126 
00127 // Entry point into the tests
00128 int main() {
00129     return !Harness::run(specification);
00130 }