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Diffstat (limited to 'examples/imx7_colibri_m4/demo_apps/sensor_demo/common/mma8451q.c')
| -rw-r--r-- | examples/imx7_colibri_m4/demo_apps/sensor_demo/common/mma8451q.c | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/examples/imx7_colibri_m4/demo_apps/sensor_demo/common/mma8451q.c b/examples/imx7_colibri_m4/demo_apps/sensor_demo/common/mma8451q.c new file mode 100644 index 0000000..d44f63d --- /dev/null +++ b/examples/imx7_colibri_m4/demo_apps/sensor_demo/common/mma8451q.c @@ -0,0 +1,185 @@ +/* + * Copyright (c) 2015, Freescale Semiconductor, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * o Redistributions of source code must retain the above copyright notice, this list + * of conditions and the following disclaimer. + * + * o Redistributions in binary form must reproduce the above copyright notice, this + * list of conditions and the following disclaimer in the documentation and/or + * other materials provided with the distribution. + * + * o Neither the name of Freescale Semiconductor, Inc. nor the names of its + * contributors may be used to endorse or promote products derived from this + * software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR + * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <stdint.h> +#include <stdbool.h> +#include "board.h" +#include "debug_console_imx.h" +#include "i2c_xfer.h" +#include "mma8451q.h" + +static uint8_t mma8451qMode; + +/*FUNCTION**************************************************************** +* +* Function Name : MMA8451Q_Init +* Returned Value : true or false +* Comments : Initialize MMA8451Q 3-axis accelerometer sensor. +* +*END*********************************************************************/ +bool MMA8451Q_Init(void) +{ + uint8_t txBuffer; + uint8_t rxBuffer; + uint8_t cmdBuffer[3]; + + /* Place the MMA8451Q in Standby */ + PRINTF("Place the MMA8451Q in standby mode... "); + cmdBuffer[0] = BOARD_I2C_MMA8451Q_ADDR << 1; + cmdBuffer[1] = MMA8451Q_CTRL_REG1; + txBuffer = 0x00; + if (!I2C_XFER_SendDataBlocking(cmdBuffer, 2, &txBuffer, 1)) + { + PRINTF("ERROR\n\r"); + return false; + } + PRINTF("OK\n\r"); + + // write 0000 0000= 0x00 to MMA8451Q_XYZ_DATA_CFG register + // [7]: reserved + // [6]: reserved + // [5]: reserved + // [4]: hpf_out=0 + // [3]: reserved + // [2]: reserved + // [1-0]: fs=00 for 2g mode. + PRINTF("Set the mode: 2G ... "); + cmdBuffer[0] = BOARD_I2C_MMA8451Q_ADDR << 1; + cmdBuffer[1] = MMA8451Q_XYZ_DATA_CFG; + txBuffer = 0x00; + if (!I2C_XFER_SendDataBlocking(cmdBuffer, 2, &txBuffer, 1)) + { + PRINTF("ERROR\n\r"); + return false; + } + mma8451qMode = 0U; + PRINTF("OK\n\r"); + + // write 0000 0001 = 0x01 to MMA8451Q_CTRL_REG1 + // [7-6]: aslp_rate=00 + // [5-3]: dr=000 + // [2]: lnoise=0 + // [1]: f_read=0 for normal read mode + // [0]: active=1 to take the part out of standby and enable sampling + PRINTF("Fast read clear and active mode ... "); + cmdBuffer[0] = BOARD_I2C_MMA8451Q_ADDR << 1; + cmdBuffer[1] = MMA8451Q_CTRL_REG1; + txBuffer = 0x01; + if (!I2C_XFER_SendDataBlocking(cmdBuffer, 2, &txBuffer, 1)) + { + PRINTF("ERROR\n\r"); + return false; + } + PRINTF("OK\n\r"); + + // read WHO_AM_I device register, 0x1A + PRINTF("Test WHO_AM_I check... "); + cmdBuffer[0] = BOARD_I2C_MMA8451Q_ADDR << 1; + cmdBuffer[1] = MMA8451Q_WHO_AM_I; + cmdBuffer[2] = (BOARD_I2C_MMA8451Q_ADDR << 1) + 1; + if (!I2C_XFER_ReceiveDataBlocking(cmdBuffer, 3, &rxBuffer, 1)) + { + PRINTF("ERROR\n\r"); + return false; + } + if(rxBuffer == MMA8451Q_DEVICE_ID) + PRINTF("OK\n\r"); + else + { + PRINTF("ERROR\n\r"); + return false; + } + return true; +} + +/*FUNCTION**************************************************************** +* +* Function Name : MMA8451Q_ReadData +* Returned Value : true or false +* Comments : Get current acceleration from MMA8451Q. +* +*END*********************************************************************/ +bool MMA8451Q_ReadData(int16_t *x, int16_t *y, int16_t *z) +{ + uint8_t rxBuffer[7]; + uint8_t cmdBuffer[3]; + + cmdBuffer[0] = BOARD_I2C_MMA8451Q_ADDR << 1; + cmdBuffer[1] = MMA8451Q_OUT_X_MSB; + cmdBuffer[2] = (BOARD_I2C_MMA8451Q_ADDR << 1) + 1; + if (!I2C_XFER_ReceiveDataBlocking(cmdBuffer, 3, rxBuffer, 7)) + return false; + + *x = ((rxBuffer[0] << 8) & 0xff00) | rxBuffer[1]; + *y = ((rxBuffer[2] << 8) & 0xff00) | rxBuffer[3]; + *z = ((rxBuffer[4] << 8) & 0xff00) | rxBuffer[5]; + *x = (int16_t)(*x) >> 2; + *y = (int16_t)(*y) >> 2; + *z = (int16_t)(*z) >> 2; + + if(mma8451qMode == mma8451qMode_4G) + { + (*x) = (*x) << 1; + (*y) = (*y) << 1; + (*z) = (*z) << 1; + } + else if(mma8451qMode == mma8451qMode_8G) + { + (*x) = (*x) << 2; + (*y) = (*y) << 2; + (*z) = (*z) << 2; + } + + return true; +} + + /*FUNCTION**************************************************************** +* +* Function Name : MMA8451Q_ChangeMode +* Returned Value : true or false +* Comments : Change the current mode. +* +*END*********************************************************************/ +bool MMA8451Q_ChangeMode(uint8_t mode) +{ + uint8_t txBuffer; + uint8_t cmdBuffer[2]; + + cmdBuffer[0] = BOARD_I2C_MMA8451Q_ADDR << 1; + cmdBuffer[1] = MMA8451Q_XYZ_DATA_CFG; + txBuffer = mode; + if (!I2C_XFER_SendDataBlocking(cmdBuffer, 2, &txBuffer, 1)) + return false; + return true; +} + +/******************************************************************************* + * EOF + ******************************************************************************/ |