diff options
Diffstat (limited to 'peripheral/libupm/src/mma7660/mma7660.cxx.orig')
-rw-r--r-- | peripheral/libupm/src/mma7660/mma7660.cxx.orig | 275 |
1 files changed, 275 insertions, 0 deletions
diff --git a/peripheral/libupm/src/mma7660/mma7660.cxx.orig b/peripheral/libupm/src/mma7660/mma7660.cxx.orig new file mode 100644 index 0000000..a563dd4 --- /dev/null +++ b/peripheral/libupm/src/mma7660/mma7660.cxx.orig @@ -0,0 +1,275 @@ +/* + * Author: Jon Trulson <jtrulson@ics.com> + * Copyright (c) 2015 Intel Corporation. + * + * 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 <stdexcept> +#include <string> + +#include "mma7660.h" + +using namespace upm; +using namespace std; + + +MMA7660::MMA7660(int bus, uint8_t address) +{ + m_addr = address; + m_isrInstalled = false; + + // setup our i2c link + if ( !(m_i2c = mraa_i2c_init(bus)) ) + { + throw std::invalid_argument(std::string(__FUNCTION__) + + ": mraa_i2c_init() failed"); + return; + } + + mraa_result_t rv; + + if ( (rv = mraa_i2c_address(m_i2c, m_addr)) != MRAA_SUCCESS) + { + throw std::invalid_argument(std::string(__FUNCTION__) + + ": mraa_i2c_address() failed"); + return; + } +} + +MMA7660::~MMA7660() +{ + if (m_isrInstalled) + uninstallISR(); + + setModeStandby(); + mraa_i2c_stop(m_i2c); +} + +bool MMA7660::writeByte(uint8_t reg, uint8_t byte) +{ + mraa_result_t rv = mraa_i2c_write_byte_data(m_i2c, byte, reg); + + if (rv != MRAA_SUCCESS) + { + return false; + } + + return true; +} + +uint8_t MMA7660::readByte(uint8_t reg) +{ + return mraa_i2c_read_byte_data(m_i2c, reg); +} + +void MMA7660::getRawValues(int *x, int *y, int *z) +{ + *x = getVerifiedAxis(REG_XOUT); + *y = getVerifiedAxis(REG_YOUT); + *z = getVerifiedAxis(REG_ZOUT); +} + +#ifdef JAVACALLBACK +int *MMA7660::getRawValues() +{ + int *values = new int[3]; + getRawValues(&values[0], &values[1], &values[2]); + return values; +} +#endif + +void MMA7660::setModeActive() +{ + uint8_t modeReg = readByte(REG_MODE); + + // The D2 (TON bit) should be cleared, and the MODE bit set + + modeReg &= ~MODE_TON; + modeReg |= MODE_MODE; + + writeByte(REG_MODE, modeReg); +} + +void MMA7660::setModeStandby() +{ + uint8_t modeReg = readByte(REG_MODE); + + // the D0 (mode bit) and D2 (TON bit) should be cleared. + + modeReg &= ~MODE_TON; + modeReg &= ~MODE_MODE; + + writeByte(REG_MODE, modeReg); +} + +// read an axis value, verifying it's validity +int MMA7660::getVerifiedAxis(MMA7660_REG_T axis) +{ + // We only want one of the 3 axes + + if (axis > 2) + { + throw std::out_of_range(std::string(__FUNCTION__) + + ": axis must be 0, 1, or 2."); + return 0; + } + + // we need to check the alert bit and sign bits if the alert bit is + // set, this means that the register was being updated when the + // register was read, so re-read until it's clear. + + uint8_t val; + do { + val = readByte(axis); + + // check alert bit + } while (val & 0x40); + + // shift the sign bit over, and compensate + return (char(val << 2) / 4); +} + +// read the tilt register, verifying it's validity +uint8_t MMA7660::getVerifiedTilt() +{ + // we need to check the alert bit and sign bits if the alert bit is + // set, this means that the register was being updated when the + // register was read, so re-read until it's clear. + + uint8_t val; + do { + val = readByte(REG_TILT); + + // check alert bit + } while (val & 0x40); + + return val; +} + +uint8_t MMA7660::tiltBackFront() +{ + uint8_t val = getVerifiedTilt(); + + // mask off the bits we don't care about + val &= 0x03; + return val; +} + +uint8_t MMA7660::tiltLandscapePortrait() +{ + uint8_t val = getVerifiedTilt(); + + // mask off the bits we don't care about + val >>= 2; + val &= 0x07; + return val; +} + +bool MMA7660::tiltTap() +{ + uint8_t val = getVerifiedTilt(); + + if (val & 0x20) + return true; + else + return false; +} + +bool MMA7660::tiltShake() +{ + uint8_t val = getVerifiedTilt(); + + if (val & 0x80) + return true; + else + return false; +} + +#ifdef JAVACALLBACK +void MMA7660::installISR(int pin, IsrCallback *cb) +{ + installISR(pin, generic_callback_isr, cb); +} +#endif + +void MMA7660::installISR(int pin, void (*isr)(void *), void *arg) +{ + if (m_isrInstalled) + uninstallISR(); + + if ( !(m_gpio = mraa_gpio_init(pin)) ) + { + throw std::invalid_argument(std::string(__FUNCTION__) + + ": mraa_gpio_init() failed, invalid pin?"); + return; + } + + mraa_gpio_dir(m_gpio, MRAA_GPIO_IN); + + // install our interrupt handler + mraa_gpio_isr(m_gpio, MRAA_GPIO_EDGE_RISING, + isr, arg); + m_isrInstalled = true; +} + +void MMA7660::uninstallISR() +{ + if (!m_isrInstalled) + return; + + mraa_gpio_isr_exit(m_gpio); + m_isrInstalled = false; + mraa_gpio_close(m_gpio); +} + +bool MMA7660::setInterruptBits(uint8_t ibits) +{ + return writeByte(REG_INTSU, ibits); +} + +bool MMA7660::setSampleRate(MMA7660_AUTOSLEEP_T sr) +{ + return writeByte(REG_SR, sr); +} + +void MMA7660::getAcceleration(float *ax, float *ay, float *az) +{ + int x, y, z; + + getRawValues(&x, &y, &z); + + // 21.33, typical counts/g + + *ax = x/21.33; + *ay = y/21.33; + *az = z/21.33; +} + +#ifdef JAVACALLBACK +float *MMA7660::getAcceleration() +{ + float *values = new float[3]; + getAcceleration(&values[0], &values[1], &values[2]); + return values; +} +#endif + |