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Merge pull request #1105 from 0xc0170/dev_asynch_unit_tests
Asynch Unit tests (Serial, SPI, I2C, low power ticker)
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‎libraries/tests/utest/i2c_eeprom_asynch/i2c_eeprom_asynch.cpp

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/* mbed Microcontroller Library
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* Copyright (c) 2015 ARM Limited
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdio.h>
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#include "TestHarness.h"
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#include "mbed.h"
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/* EEPROM 24LC256 Test Unit, to test I2C asynchronous communication.
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*/
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#if !DEVICE_I2C || !DEVICE_I2C_ASYNCH
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#error i2c_master_eeprom_asynch requires asynch I2C
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#endif
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#if defined(TARGET_K64F)
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#define TEST_SDA_PIN PTE25
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#define TEST_SCL_PIN PTE24
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#else
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#error Target not supported
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#endif
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#define PATTERN_MASK 0x66, ~0x66, 0x00, 0xFF, 0xA5, 0x5A, 0xF0, 0x0F
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volatile int why;
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volatile bool complete;
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void cbdone(int event) {
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complete = true;
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why = event;
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}
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const unsigned char pattern[] = { PATTERN_MASK };
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TEST_GROUP(I2C_Master_EEPROM_Asynchronous)
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{
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I2C *obj;
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const int eeprom_address = 0xA0;
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event_callback_t callback;
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void setup() {
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obj = new I2C(TEST_SDA_PIN, TEST_SCL_PIN);
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obj->frequency(400000);
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complete = false;
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why = 0;
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callback.attach(cbdone);
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}
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void teardown() {
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delete obj;
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obj = NULL;
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}
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};
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TEST(I2C_Master_EEPROM_Asynchronous, tx_rx_one_byte_separate_transactions)
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{
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int rc;
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char data[] = { 0, 0, 0x66};
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rc = obj->transfer(eeprom_address, data, sizeof(data), NULL, 0, callback, I2C_EVENT_ALL, false);
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CHECK_EQUAL(0, rc);
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while (!complete) {
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sleep();
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}
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CHECK_EQUAL(why, I2C_EVENT_TRANSFER_COMPLETE);
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// wait until slave is ready
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do {
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complete = 0;
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why = 0;
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obj->transfer(eeprom_address, NULL, 0, NULL, 0, callback, I2C_EVENT_ALL, false);
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while (!complete) {
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sleep();
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}
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} while (why != I2C_EVENT_TRANSFER_COMPLETE);
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// write the address for reading (0,0) then start reading data
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data[0] = 0;
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data[1] = 0;
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data[2] = 0;
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why = 0;
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complete = 0;
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obj->transfer(eeprom_address, data, 2, NULL, 0, callback, I2C_EVENT_ALL, true);
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while (!complete) {
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sleep();
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}
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CHECK_EQUAL(why, I2C_EVENT_TRANSFER_COMPLETE);
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data[0] = 0;
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data[1] = 0;
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data[2] = 0;
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why = 0;
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complete = 0;
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rc = obj->transfer(eeprom_address, NULL, 0, data, 1, callback, I2C_EVENT_ALL, false);
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CHECK_EQUAL(0, rc);
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while (!complete) {
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sleep();
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}
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CHECK_EQUAL(why, I2C_EVENT_TRANSFER_COMPLETE);
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CHECK_EQUAL(data[0], 0x66);
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}
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TEST(I2C_Master_EEPROM_Asynchronous, tx_rx_one_byte_one_transactions)
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{
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int rc;
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char send_data[] = { 0, 0, 0x66};
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rc = obj->transfer(eeprom_address, send_data, sizeof(send_data), NULL, 0, callback, I2C_EVENT_ALL, false);
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CHECK_EQUAL(0, rc)
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while (!complete) {
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sleep();
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}
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CHECK_EQUAL(why, I2C_EVENT_TRANSFER_COMPLETE);
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// wait until slave is ready
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do {
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complete = 0;
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why = 0;
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obj->transfer(eeprom_address, NULL, 0, NULL, 0, callback, I2C_EVENT_ALL, false);
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while (!complete) {
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sleep();
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}
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} while (why != I2C_EVENT_TRANSFER_COMPLETE);
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send_data[0] = 0;
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send_data[1] = 0;
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send_data[2] = 0;
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char receive_data[1] = {0};
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why = 0;
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complete = 0;
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rc = obj->transfer(eeprom_address, send_data, 2, receive_data, 1, callback, I2C_EVENT_ALL, false);
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CHECK_EQUAL(0, rc);
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while (!complete) {
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sleep();
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}
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CHECK_EQUAL(why, I2C_EVENT_TRANSFER_COMPLETE);
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CHECK_EQUAL(receive_data[0], 0x66);
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}
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TEST(I2C_Master_EEPROM_Asynchronous, tx_rx_pattern)
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{
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int rc;
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char data[] = { 0, 0, PATTERN_MASK};
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// write 8 bytes to 0x0, then read them
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rc = obj->transfer(eeprom_address, data, sizeof(data), NULL, 0, callback, I2C_EVENT_ALL, false);
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CHECK_EQUAL(0, rc);
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while (!complete) {
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sleep();
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}
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CHECK_EQUAL(why, I2C_EVENT_TRANSFER_COMPLETE);
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// wait until slave is ready
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do {
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complete = 0;
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why = 0;
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obj->transfer(eeprom_address, NULL, 0, NULL, 0, callback, I2C_EVENT_ALL, false);
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while (!complete) {
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sleep();
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}
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} while (why != I2C_EVENT_TRANSFER_COMPLETE);
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complete = 0;
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why = 0;
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char rec_data[8] = {0};
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rc = obj->transfer(eeprom_address, rec_data, 2, NULL, 0, callback, I2C_EVENT_ALL, true);
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CHECK_EQUAL(0, rc);
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while (!complete) {
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sleep();
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}
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CHECK_EQUAL(why, I2C_EVENT_TRANSFER_COMPLETE);
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complete = 0;
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why = 0;
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rc = obj->transfer(eeprom_address, NULL, 0, rec_data, 8, callback, I2C_EVENT_ALL, false);
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CHECK_EQUAL(0, rc);
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while (!complete) {
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sleep();
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}
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CHECK_EQUAL(why, I2C_EVENT_TRANSFER_COMPLETE);
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// received buffer match with pattern
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rc = memcmp(pattern, rec_data, sizeof(rec_data));
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CHECK_EQUAL(0, rc);
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}

‎libraries/tests/utest/lp_ticker/lp_ticker.cpp

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/* mbed Microcontroller Library
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* Copyright (c) 2015 ARM Limited
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdio.h>
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#include "TestHarness.h"
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#include "mbed.h"
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#include "us_ticker_api.h"
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/* Low power timer test.
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*/
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#if !DEVICE_LOWPOWERTIMER
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#error This test unit requires low power to be defined for a target
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#endif
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volatile bool complete;
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void cbdone() {
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complete = true;
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}
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TEST_GROUP(LowPowerTimerTest)
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{
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LowPowerTimeout *obj;
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void setup() {
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obj = new LowPowerTimeout;
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complete = false;
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}
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void teardown() {
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delete obj;
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obj = NULL;
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}
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};
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// 2 second timeout using lp ticker, time is measured using us ticker
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TEST(LowPowerTimerTest, lp_ticker_callback_2sec_timeout)
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{
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timestamp_t start = us_ticker_read();
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obj->attach(&cbdone, 2.0f);
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while (!complete);
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timestamp_t end = us_ticker_read();
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// Not accurate for longer delays, thus +/-
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if ((end - start) > 2100000) {
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printf("Error! Start: %u, end: %u. It took longer than 2.1 sec.", start, end);
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CHECK_EQUAL(0, 1);
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}
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CHECK_EQUAL(complete, 1);
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}
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// 50 microsecond timeout
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TEST(LowPowerTimerTest, lp_ticker_callback_50us_timeout)
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{
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timestamp_t start = us_ticker_read();
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obj->attach_us(&cbdone, 50);
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while(!complete);
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timestamp_t end = us_ticker_read();
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// roughly should be around 50us +/- 500us, for example with 32kHz, it can be 32us the lowest
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CHECK_EQUAL(((end - start) > 1) && ((end - start) < 500) ,1);
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CHECK_EQUAL(complete, 1);
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}
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// 1 milisecond timeout
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TEST(LowPowerTimerTest, lp_ticker_callback_1ms_timeout)
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{
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timestamp_t start = us_ticker_read();
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obj->attach_us(&cbdone, 1000);
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while(!complete);
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timestamp_t end = us_ticker_read();
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CHECK_EQUAL(((end - start) > 800) && ((end - start) < 1600) ,1);
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CHECK_EQUAL(complete, 1);
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}
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// 5 second wake up from deep sleep
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TEST(LowPowerTimerTest, lp_ticker_deepsleep_wakeup_5sec_timeout)
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{
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timestamp_t start = lp_ticker_read();
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obj->attach(&cbdone, 5.0f);
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deepsleep();
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while (!complete);
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timestamp_t end = lp_ticker_read();
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// roughly should be around 5seconds +/- 100ms
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CHECK_EQUAL(((end - start) > 4900000) && ((end - start) < 5100000) ,1);
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CHECK_EQUAL(complete, 1);
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}
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// 1ms wake up from deep sleep
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TEST(LowPowerTimerTest, lp_ticker_deepsleep_wakeup_1ms_timeout)
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{
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timestamp_t start = lp_ticker_read();
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obj->attach(&cbdone, 0.001f);
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deepsleep();
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while (!complete);
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timestamp_t end = lp_ticker_read();
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// 1ms timeout +/- 600us
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CHECK_EQUAL(((end - start) > 400) && ((end - start) < 1600) ,1);
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CHECK_EQUAL(complete, 1);
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}

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