78 lines
2.2 KiB
C++
78 lines
2.2 KiB
C++
/*!
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* \file test_i2c_impl.cpp
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*
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* Copyright (C) 2018 Christos Choutouridis
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation, either version 3
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <gtest/gtest.h>
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#include <utl/com/i2c_bb.h>
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/*!
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* \warning
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* This is not right way of testing communication interfaces. We have to
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* implement a Mock object to simulate the slave's behavior. Until then
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* we have the following.
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*/
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namespace test_i2c {
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using namespace utl;
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// implementer class stub
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class I2C : public i2c_bb_i<I2C> {
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friend i2c_bb_i<I2C>;
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void SCL (bool x) { (void)x; } // imaginary SCL pin functionality
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bool SDA (SDAMode mode, bool x) {
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(void)mode;
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(void)x;
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// always read 0 back (which means always ACK)
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return 0;
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}
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void delay (uint32_t u) {
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(void)u;
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// Pseudo-delay
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for (int i =0 ; i<10 ; ++i)
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;
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}
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public:
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I2C (uint32_t clk =100000) noexcept
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: i2c_bb_i<I2C>(clk) {
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start();
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}
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};
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TEST(Test_i2c_impl, TestConcept) {
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I2C i2c {};
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// EXPECT_EQ(I2c_i<I2C>, true);
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}
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TEST(Test_i2c_impl, TestConstruction) {
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I2C i2c {};
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EXPECT_EQ(i2c.clock(), 100000UL);
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}
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TEST(Test_i2c_impl, TestFunctionality) {
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I2C i2c {};
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uint8_t b = 42;
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i2c.clock(200000UL);
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//EXPECT_EQ(i2c.clock(), 200000UL);
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EXPECT_EQ(i2c.tx_data(b), true);
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EXPECT_EQ(i2c.rx_data(true), 0x00);
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EXPECT_EQ(i2c.rx_data(false), 0x00);
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}
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}
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