diff options
Diffstat (limited to 'peripheral/libupm/src/groveultrasonic/groveultrasonic.cxx')
-rw-r--r-- | peripheral/libupm/src/groveultrasonic/groveultrasonic.cxx | 104 |
1 files changed, 0 insertions, 104 deletions
diff --git a/peripheral/libupm/src/groveultrasonic/groveultrasonic.cxx b/peripheral/libupm/src/groveultrasonic/groveultrasonic.cxx deleted file mode 100644 index 2a695f7..0000000 --- a/peripheral/libupm/src/groveultrasonic/groveultrasonic.cxx +++ /dev/null @@ -1,104 +0,0 @@ -/* - * Author: Jun Kato <i@junkato.jp> - * Copyright (c) 2015 Jun Kato. - * - * Thanks to Seeed Studio for a working arduino sketch - * - * 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. - */ - -#include <iostream> -#include <unistd.h> -#include <stdlib.h> -#include <functional> - -#include "groveultrasonic.h" - -using namespace upm; - -GroveUltraSonic::GroveUltraSonic (uint8_t pin) { - mraa_result_t error = MRAA_SUCCESS; - m_name = "GroveUltraSonic"; - - mraa_init(); - - // setup pin - m_pinCtx = mraa_gpio_init(pin); - if (m_pinCtx == NULL) { - fprintf (stderr, "Are you sure that pin%d you requested is valid on your platform?", pin); - exit (1); - } - mraa_gpio_use_mmaped(m_pinCtx, 1); - mraa_gpio_isr (m_pinCtx, MRAA_GPIO_EDGE_BOTH, - &signalISR, this); -} - -GroveUltraSonic::~GroveUltraSonic () { - - // close pin - mraa_gpio_isr_exit(m_pinCtx); - mraa_gpio_close (m_pinCtx); -} - -int -GroveUltraSonic::getDistance () { - - // output trigger signal - mraa_gpio_dir(m_pinCtx, MRAA_GPIO_OUT); - mraa_gpio_write(m_pinCtx, LOW); - usleep(2); - mraa_gpio_write(m_pinCtx, HIGH); - usleep(5); - mraa_gpio_write(m_pinCtx, LOW); - - // wait for the pulse, - m_doWork = true; - m_InterruptCounter = 0; - mraa_gpio_dir(m_pinCtx, MRAA_GPIO_IN); - - // though do not wait over 25 [ms]. - int timer = 0; - while (m_doWork && timer++ < 5) { - // in 25 [ms], sound travels 25000 / 29 / 2 = 431 [cm], - // which is more than 400 [cm], the max distance measurable with this sensor. - usleep(5 * 1000); // 5 [ms] - } - - // calc diff - long diff = m_FallingTimeStamp.tv_usec - m_RisingTimeStamp.tv_usec; - diff += (m_FallingTimeStamp.tv_sec - m_RisingTimeStamp.tv_sec) * 1000000; - return timer >= 5 ? 0 : diff; -} - -void -GroveUltraSonic::signalISR(void *ctx) { - upm::GroveUltraSonic *This = (upm::GroveUltraSonic *)ctx; - This->ackEdgeDetected(); -} - -void -GroveUltraSonic::ackEdgeDetected () { - if (++m_InterruptCounter % 2 == 0) { - gettimeofday(&m_FallingTimeStamp, NULL); - m_doWork = false; - } else { - gettimeofday(&m_RisingTimeStamp, NULL); - } -} |