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0001-Add-I2C-and-Sensor-Drivers.patch
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From c840f360282f707737c4072d0de322f8522101db Mon Sep 17 00:00:00 2001
From: "Chee Weng, TAN" <[email protected]>
Date: Wed, 27 May 2020 04:47:03 +0800
Subject: [PATCH 1/2] Add I2C and Sensor Drivers
Add I2C Driver, MEMS Sensor (LSM6DSO), Pressure Sensor (LPS22HH) Device Driver
---
Samples/AzureIoT/i2cDevice.c | 669 +++
Samples/AzureIoT/i2cDevice.h | 10 +
Samples/AzureIoT/lps22hh_reg.c | 1832 +++++++
Samples/AzureIoT/lps22hh_reg.h | 525 ++
Samples/AzureIoT/lsm6dso_reg.c | 8950 ++++++++++++++++++++++++++++++++
Samples/AzureIoT/lsm6dso_reg.h | 2770 ++++++++++
6 files changed, 14756 insertions(+)
create mode 100755 Samples/AzureIoT/i2cDevice.c
create mode 100755 Samples/AzureIoT/i2cDevice.h
create mode 100755 Samples/AzureIoT/lps22hh_reg.c
create mode 100755 Samples/AzureIoT/lps22hh_reg.h
create mode 100755 Samples/AzureIoT/lsm6dso_reg.c
create mode 100755 Samples/AzureIoT/lsm6dso_reg.h
diff --git a/Samples/AzureIoT/i2cDevice.c b/Samples/AzureIoT/i2cDevice.c
new file mode 100755
index 0000000..27d0cb9
--- /dev/null
+++ b/Samples/AzureIoT/i2cDevice.c
@@ -0,0 +1,669 @@
+/*
+ * Some of the code in this file was copied from ST Micro. Below is their required information.
+ *
+ * @attention
+ *
+ * <h2><center>© COPYRIGHT(c) 2018 STMicroelectronics</center></h2>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. 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.
+ * 3. Neither the name of STMicroelectronics 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
+ * 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 <errno.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <math.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <stdarg.h>
+
+#include <applibs/log.h>
+#include <applibs/i2c.h>
+
+#include <hw/sample_hardware.h>
+#include "i2cDevice.h"
+
+#include "lsm6dso_reg.h"
+#include "lps22hh_reg.h"
+
+// Azure IoT SDK
+#include <iothub_client_core_common.h>
+#include <iothub_device_client_ll.h>
+#include <iothub_client_options.h>
+#include <iothubtransportmqtt.h>
+#include <iothub.h>
+#include <azure_sphere_provisioning.h>
+
+#define IOT_CENTRAL_APPLICATION
+#define JSON_BUFFER_SIZE 256
+
+/* Private variables ---------------------------------------------------------*/
+static axis3bit16_t data_raw_acceleration;
+static axis3bit16_t data_raw_angular_rate;
+static axis3bit16_t raw_angular_rate_calibration;
+static axis1bit32_t data_raw_pressure;
+static axis1bit16_t data_raw_temperature;
+static float acceleration_mg[3];
+static float angular_rate_dps[3];
+static float lsm6dsoTemperature_degC;
+static float pressure_hPa;
+static float lps22hhTemperature_degC;
+
+static uint8_t whoamI, rst;
+int accelTimerFd;
+const uint8_t lsm6dsOAddress = LSM6DSO_ADDRESS; // Addr = 0x6A
+lsm6dso_ctx_t dev_ctx;
+lps22hh_ctx_t pressure_ctx;
+bool lps22hhDetected;
+
+int i2cFd = -1;
+
+//Extern variables
+extern IOTHUB_DEVICE_CLIENT_LL_HANDLE iothubClientHandle;
+
+// Publilc functions
+void SensorHub_SendData(void);
+
+//Private functions
+
+// Routines to read/write to the LSM6DSO device
+static int32_t platform_write(int *fD, uint8_t reg, uint8_t *bufp, uint16_t len);
+static int32_t platform_read(int *fD, uint8_t reg, uint8_t *bufp, uint16_t len);
+
+// Routines to read/write to the LPS22HH device connected to the LSM6DSO sensor hub
+static int32_t lsm6dso_write_lps22hh_cx(void* ctx, uint8_t reg, uint8_t* data, uint16_t len);
+static int32_t lsm6dso_read_lps22hh_cx(void* ctx, uint8_t reg, uint8_t* data, uint16_t len);
+
+extern void CloseFdAndPrintError(int fd, const char* fdName);
+
+/// <summary>
+/// Sleep for delayTime ms
+/// </summary>
+void HAL_Delay(int delayTime) {
+ struct timespec ts;
+ ts.tv_sec = 0;
+ ts.tv_nsec = delayTime * 10000;
+ nanosleep(&ts, NULL);
+}
+
+static void sendMessageCallback(IOTHUB_CLIENT_CONFIRMATION_RESULT result, void* context)
+{
+ Log_Debug("INFO: Message received by IoT Hub. Result is: %d\n", result);
+}
+
+static void sendMessage(const char* messagePayload)
+{
+ if (iothubClientHandle == NULL) {
+ Log_Debug("WARNING: IoT Hub client not initialized\n");
+ return;
+ }
+
+ IOTHUB_MESSAGE_HANDLE messageHandle = IoTHubMessage_CreateFromString(messagePayload);
+
+ if (messageHandle == 0) {
+ Log_Debug("WARNING: unable to create a new IoTHubMessage\n");
+ return;
+ }
+
+ if (IoTHubDeviceClient_LL_SendEventAsync(iothubClientHandle, messageHandle, sendMessageCallback,
+ /*&callback_param*/ 0) != IOTHUB_CLIENT_OK) {
+ Log_Debug("WARNING: failed to hand over the message to IoTHubClient\n");
+ }
+ else {
+ Log_Debug("INFO: IoTHubClient accepted the message for delivery\n");
+ }
+
+ IoTHubMessage_Destroy(messageHandle);
+}
+
+/// <summary>
+/// Print latest data from on-board sensors.
+/// </summary>
+void SensorHub_SendData(void)
+{
+ uint8_t reg;
+ lps22hh_reg_t lps22hhReg;
+
+#if (defined(IOT_CENTRAL_APPLICATION) || defined(IOT_HUB_APPLICATION))
+ static bool firstPass = true;
+#endif
+
+ // Read the sensors on the lsm6dso device
+
+ //Read output only if new xl value is available
+ lsm6dso_xl_flag_data_ready_get(&dev_ctx, ®);
+ if (reg)
+ {
+ // Read acceleration field data
+ memset(data_raw_acceleration.u8bit, 0x00, 3 * sizeof(int16_t));
+ lsm6dso_acceleration_raw_get(&dev_ctx, data_raw_acceleration.u8bit);
+
+ acceleration_mg[0] = lsm6dso_from_fs4_to_mg(data_raw_acceleration.i16bit[0]);
+ acceleration_mg[1] = lsm6dso_from_fs4_to_mg(data_raw_acceleration.i16bit[1]);
+ acceleration_mg[2] = lsm6dso_from_fs4_to_mg(data_raw_acceleration.i16bit[2]);
+
+ Log_Debug("\nLSM6DSO: Acceleration [mg] : %.4lf, %.4lf, %.4lf\n",
+ acceleration_mg[0], acceleration_mg[1], acceleration_mg[2]);
+ }
+
+ lsm6dso_gy_flag_data_ready_get(&dev_ctx, ®);
+ if (reg)
+ {
+ // Read angular rate field data
+ memset(data_raw_angular_rate.u8bit, 0x00, 3 * sizeof(int16_t));
+ lsm6dso_angular_rate_raw_get(&dev_ctx, data_raw_angular_rate.u8bit);
+
+ // Before we store the mdps values subtract the calibration data we captured at startup.
+ angular_rate_dps[0] = (lsm6dso_from_fs2000_to_mdps(data_raw_angular_rate.i16bit[0] - raw_angular_rate_calibration.i16bit[0])) / 1000.0;
+ angular_rate_dps[1] = (lsm6dso_from_fs2000_to_mdps(data_raw_angular_rate.i16bit[1] - raw_angular_rate_calibration.i16bit[1])) / 1000.0;
+ angular_rate_dps[2] = (lsm6dso_from_fs2000_to_mdps(data_raw_angular_rate.i16bit[2] - raw_angular_rate_calibration.i16bit[2])) / 1000.0;
+
+ Log_Debug("LSM6DSO: Angular rate [dps] : %4.2f, %4.2f, %4.2f\r\n",
+ angular_rate_dps[0], angular_rate_dps[1], angular_rate_dps[2]);
+
+ }
+
+ lsm6dso_temp_flag_data_ready_get(&dev_ctx, ®);
+ if (reg)
+ {
+ // Read temperature data
+ memset(data_raw_temperature.u8bit, 0x00, sizeof(int16_t));
+ lsm6dso_temperature_raw_get(&dev_ctx, data_raw_temperature.u8bit);
+ lsm6dsoTemperature_degC = lsm6dso_from_lsb_to_celsius(data_raw_temperature.i16bit);
+
+ Log_Debug("LSM6DSO: Temperature [degC]: %.2f\r\n", lsm6dsoTemperature_degC);
+ }
+
+ // Read the lps22hh sensor on the lsm6dso device
+
+ // Initialize the data structures to 0s.
+ memset(data_raw_pressure.u8bit, 0x00, sizeof(int32_t));
+ memset(data_raw_temperature.u8bit, 0x00, sizeof(int16_t));
+
+ if (lps22hhDetected) {
+ lps22hh_read_reg(&pressure_ctx, LPS22HH_STATUS, (uint8_t *)&lps22hhReg, 1);
+
+ //Read output only if new value is available
+
+ if ((lps22hhReg.status.p_da == 1) && (lps22hhReg.status.t_da == 1))
+ {
+ lps22hh_pressure_raw_get(&pressure_ctx, data_raw_pressure.u8bit);
+
+ pressure_hPa = lps22hh_from_lsb_to_hpa(data_raw_pressure.i32bit);
+
+ lps22hh_temperature_raw_get(&pressure_ctx, data_raw_temperature.u8bit);
+ lps22hhTemperature_degC = lps22hh_from_lsb_to_celsius(data_raw_temperature.i16bit);
+
+ Log_Debug("LPS22HH: Pressure [hPa] : %.2f\r\n", pressure_hPa);
+ Log_Debug("LPS22HH: Temperature [degC]: %.2f\r\n", lps22hhTemperature_degC);
+ }
+ }
+ // LPS22HH was not detected
+ else {
+
+ Log_Debug("LPS22HH: Pressure [hPa] : Not read!\r\n");
+ Log_Debug("LPS22HH: Temperature [degC]: Not read!\r\n");
+ }
+
+
+#if (defined(IOT_CENTRAL_APPLICATION) || defined(IOT_HUB_APPLICATION))
+
+ // We've seen that the first read of the Accelerometer data is garbage. If this is the first pass
+ // reading data, don't report it to Azure. Since we're graphing data in Azure, this data point
+ // will skew the data.
+ if (!firstPass)
+ {
+ // Allocate memory for a telemetry message to Azure
+ char *pjsonBuffer = (char *)malloc(JSON_BUFFER_SIZE);
+ if (pjsonBuffer == NULL) {
+ Log_Debug("ERROR: not enough memory to send telemetry");
+ }
+
+ // construct the telemetry message
+ snprintf(pjsonBuffer, JSON_BUFFER_SIZE, "{\"aX\":\"%.4lf\", \"aY\":\"%.4lf\", \"aZ\":\"%.4lf\", \"pressure\": \"%.2f\", \"gX\": \"%4.2f\", \"gY\": \"%4.2f\", \"gZ\": \"%4.2f\", \"Temperature\": \"%.2f\"}",
+ acceleration_mg[0], acceleration_mg[1], acceleration_mg[2], pressure_hPa, angular_rate_dps[0], angular_rate_dps[1], angular_rate_dps[2], lps22hhTemperature_degC);
+
+ Log_Debug("\n[Info] Sending telemetry: %s\n", pjsonBuffer);
+ sendMessage(pjsonBuffer);
+ free(pjsonBuffer);
+
+ }
+
+ firstPass = false;
+
+#endif
+
+}
+
+int initI2cDevice(void) {
+
+ i2cFd = I2CMaster_Open(AVNET_MT3620_SK_ISU2_I2C);
+ if (i2cFd < 0) {
+ Log_Debug("ERROR: I2CMaster_Open: errno=%d (%s)\n", errno, strerror(errno));
+ return -1;
+ }
+
+ int result = I2CMaster_SetBusSpeed(i2cFd, I2C_BUS_SPEED_STANDARD);
+ if (result != 0) {
+ Log_Debug("ERROR: I2CMaster_SetBusSpeed: errno=%d (%s)\n", errno, strerror(errno));
+ return -1;
+ }
+
+ result = I2CMaster_SetTimeout(i2cFd, 100);
+ if (result != 0) {
+ Log_Debug("ERROR: I2CMaster_SetTimeout: errno=%d (%s)\n", errno, strerror(errno));
+ return -1;
+ }
+
+ // Start lsm6dso specific init
+
+ // Initialize lsm6dso mems driver interface
+ dev_ctx.write_reg = platform_write;
+ dev_ctx.read_reg = platform_read;
+ dev_ctx.handle = &i2cFd;
+
+ // Check device ID
+ lsm6dso_device_id_get(&dev_ctx, &whoamI);
+ if (whoamI != LSM6DSO_ID) {
+ Log_Debug("LSM6DSO not found!\n");
+ return -1;
+ }
+ else {
+ Log_Debug("LSM6DSO Found!\n");
+ }
+
+ // Restore default configuration
+ lsm6dso_reset_set(&dev_ctx, PROPERTY_ENABLE);
+ do {
+ lsm6dso_reset_get(&dev_ctx, &rst);
+ } while (rst);
+
+ // Disable I3C interface
+ lsm6dso_i3c_disable_set(&dev_ctx, LSM6DSO_I3C_DISABLE);
+
+ // Enable Block Data Update
+ lsm6dso_block_data_update_set(&dev_ctx, PROPERTY_ENABLE);
+
+ // Set Output Data Rate
+ lsm6dso_xl_data_rate_set(&dev_ctx, LSM6DSO_XL_ODR_12Hz5);
+ lsm6dso_gy_data_rate_set(&dev_ctx, LSM6DSO_GY_ODR_12Hz5);
+
+ // Set full scale
+ lsm6dso_xl_full_scale_set(&dev_ctx, LSM6DSO_4g);
+ lsm6dso_gy_full_scale_set(&dev_ctx, LSM6DSO_2000dps);
+
+ // Configure filtering chain(No aux interface)
+ // Accelerometer - LPF1 + LPF2 path
+ lsm6dso_xl_hp_path_on_out_set(&dev_ctx, LSM6DSO_LP_ODR_DIV_100);
+ lsm6dso_xl_filter_lp2_set(&dev_ctx, PROPERTY_ENABLE);
+
+ // lps22hh specific init
+
+ // Default the flag to false. If we fail to communicate with the LPS22HH device, this flag
+ // will cause application execution to skip over LPS22HH specific code.
+ lps22hhDetected = false;
+
+ // Initialize lps22hh mems driver interface
+ pressure_ctx.read_reg = lsm6dso_read_lps22hh_cx;
+ pressure_ctx.write_reg = lsm6dso_write_lps22hh_cx;
+ pressure_ctx.handle = &i2cFd;
+
+ int failCount = 10;
+
+ while (!lps22hhDetected) {
+
+ // Enable pull up on master I2C interface.
+ lsm6dso_sh_pin_mode_set(&dev_ctx, LSM6DSO_INTERNAL_PULL_UP);
+
+ // Check if LPS22HH is connected to Sensor Hub
+ lps22hh_device_id_get(&pressure_ctx, &whoamI);
+ if (whoamI != LPS22HH_ID) {
+ Log_Debug("LPS22HH not found!\n");
+ }
+ else {
+ lps22hhDetected = true;
+ Log_Debug("LPS22HH Found!\n");
+ }
+
+ // Restore the default configuration
+ lps22hh_reset_set(&pressure_ctx, PROPERTY_ENABLE);
+ do {
+ lps22hh_reset_get(&pressure_ctx, &rst);
+ } while (rst);
+
+ // Enable Block Data Update
+ lps22hh_block_data_update_set(&pressure_ctx, PROPERTY_ENABLE);
+
+ //Set Output Data Rate
+ lps22hh_data_rate_set(&pressure_ctx, LPS22HH_10_Hz_LOW_NOISE);
+
+ // If we failed to detect the lps22hh device, then pause before trying again.
+ if (!lps22hhDetected) {
+ HAL_Delay(100);
+ }
+
+ if (failCount-- == 0) {
+ bool lps22hhDetected = false;
+ Log_Debug("Failed to read LPS22HH device ID, disabling all access to LPS22HH device!\n");
+ Log_Debug("Usually a power cycle will correct this issue\n");
+ break;
+ }
+ }
+
+ // Read the raw angular rate data from the device to use as offsets. We're making the assumption that the device
+ // is stationary.
+
+ uint8_t reg;
+
+ Log_Debug("LSM6DSO: Calibrating angular rate . . .\n");
+ Log_Debug("LSM6DSO: Please make sure the device is stationary.\n");
+
+ do {
+
+ // Delay and read the device until we have data!
+ do {
+ // Read the calibration values
+ HAL_Delay(5000);
+ lsm6dso_gy_flag_data_ready_get(&dev_ctx, ®);
+ } while (!reg);
+
+ if (reg)
+ {
+ // Read angular rate field data to use for calibration offsets
+ memset(data_raw_angular_rate.u8bit, 0x00, 3 * sizeof(int16_t));
+ lsm6dso_angular_rate_raw_get(&dev_ctx, raw_angular_rate_calibration.u8bit);
+ }
+
+ // Delay and read the device until we have data!
+ do {
+ // Read the calibration values
+ HAL_Delay(5000);
+ lsm6dso_gy_flag_data_ready_get(&dev_ctx, ®);
+ } while (!reg);
+
+ // Read the angular data rate again and verify that after applying the calibration, we have 0 angular rate in all directions
+ if (reg)
+ {
+
+ // Read angular rate field data
+ memset(data_raw_angular_rate.u8bit, 0x00, 3 * sizeof(int16_t));
+ lsm6dso_angular_rate_raw_get(&dev_ctx, data_raw_angular_rate.u8bit);
+
+ // Before we store the mdps values subtract the calibration data we captured at startup.
+ angular_rate_dps[0] = lsm6dso_from_fs2000_to_mdps(data_raw_angular_rate.i16bit[0] - raw_angular_rate_calibration.i16bit[0]);
+ angular_rate_dps[1] = lsm6dso_from_fs2000_to_mdps(data_raw_angular_rate.i16bit[1] - raw_angular_rate_calibration.i16bit[1]);
+ angular_rate_dps[2] = lsm6dso_from_fs2000_to_mdps(data_raw_angular_rate.i16bit[2] - raw_angular_rate_calibration.i16bit[2]);
+
+ }
+
+ // If the angular values after applying the offset are not all 0.0s, then do it again!
+ } while ((angular_rate_dps[0] != 0.0) || (angular_rate_dps[1] != 0.0) || (angular_rate_dps[2] != 0.0));
+
+ Log_Debug("LSM6DSO: Calibrating angular rate complete!\n");
+
+ return 0;
+}
+
+/// <summary>
+/// Closes the I2C interface File Descriptors.
+/// </summary>
+void closeI2cDevice(void) {
+
+ CloseFdAndPrintError(i2cFd, "i2c");
+}
+
+/// <summary>
+/// Writes data to the lsm6dso i2c device
+/// </summary>
+/// <returns>0</returns>
+
+static int32_t platform_write(int *fD, uint8_t reg, uint8_t *bufp,
+ uint16_t len)
+{
+
+#ifdef ENABLE_READ_WRITE_DEBUG
+ Log_Debug("platform_write()\n");
+ Log_Debug("reg: %0x\n", reg);
+ Log_Debug("len: %0x\n", len);
+ Log_Debug("bufp contents: ");
+ for (int i = 0; i < len; i++) {
+
+ Log_Debug("%0x: ", bufp[i]);
+ }
+ Log_Debug("\n");
+#endif
+
+ // Construct a new command buffer that contains the register to write to, then the data to write
+ uint8_t cmdBuffer[len + 1];
+ cmdBuffer[0] = reg;
+ for (int i = 0; i < len; i++) {
+ cmdBuffer[i + 1] = bufp[i];
+ }
+
+#ifdef ENABLE_READ_WRITE_DEBUG
+ Log_Debug("cmdBuffer contents: ");
+ for (int i = 0; i < len + 1; i++) {
+
+ Log_Debug("%0x: ", cmdBuffer[i]);
+ }
+ Log_Debug("\n");
+#endif
+
+ // Write the data to the device
+ int32_t retVal = I2CMaster_Write(*fD, lsm6dsOAddress, cmdBuffer, (size_t)len + 1);
+ if (retVal < 0) {
+ Log_Debug("ERROR: platform_write: errno=%d (%s)\n", errno, strerror(errno));
+ return -1;
+ }
+#ifdef ENABLE_READ_WRITE_DEBUG
+ Log_Debug("Wrote %d bytes to device.\n\n", retVal);
+#endif
+ return 0;
+}
+
+/// <summary>
+/// Reads generic device register from the i2c interface
+/// </summary>
+/// <returns>0</returns>
+
+/*
+ * @brief Read generic device register (platform dependent)
+ *
+ * @param handle customizable argument. In this examples is used in
+ * order to select the correct sensor bus handler.
+ * @param reg register to read
+ * @param bufp pointer to buffer that store the data read
+ * @param len number of consecutive register to read
+ *
+ */
+static int32_t platform_read(int *fD, uint8_t reg, uint8_t *bufp,
+ uint16_t len)
+{
+
+#ifdef ENABLE_READ_WRITE_DEBUG
+ Log_Debug("platform_read()\n");
+ Log_Debug("reg: %0x\n", reg);
+ Log_Debug("len: %d\n", len);
+;
+#endif
+
+ // Set the register address to read
+ int32_t retVal = I2CMaster_Write(i2cFd, lsm6dsOAddress, ®, 1);
+ if (retVal < 0) {
+ Log_Debug("ERROR: platform_read(write step): errno=%d (%s)\n", errno, strerror(errno));
+ return -1;
+ }
+
+ // Read the data into the provided buffer
+ retVal = I2CMaster_Read(i2cFd, lsm6dsOAddress, bufp, len);
+ if (retVal < 0) {
+ Log_Debug("ERROR: platform_read(read step): errno=%d (%s)\n", errno, strerror(errno));
+ return -1;
+ }
+
+#ifdef ENABLE_READ_WRITE_DEBUG
+ Log_Debug("Read returned: ");
+ for (int i = 0; i < len; i++) {
+ Log_Debug("%0x: ", bufp[i]);
+ }
+ Log_Debug("\n\n");
+#endif
+
+ return 0;
+}
+/*
+ * @brief Write lsm2mdl device register (used by configuration functions)
+ *
+ * @param handle customizable argument. In this examples is used in
+ * order to select the correct sensor bus handler.
+ * @param reg register to write
+ * @param bufp pointer to data to write in register reg
+ * @param len number of consecutive register to write
+ *
+ */
+static int32_t lsm6dso_write_lps22hh_cx(void* ctx, uint8_t reg, uint8_t* data,
+ uint16_t len)
+{
+ axis3bit16_t data_raw_acceleration;
+ int32_t ret;
+ uint8_t drdy;
+ lsm6dso_status_master_t master_status;
+ lsm6dso_sh_cfg_write_t sh_cfg_write;
+
+ // Configure Sensor Hub to write to the LPS22HH, and send the write data
+ sh_cfg_write.slv0_add = (LPS22HH_I2C_ADD_L & 0xFEU) >> 1; // 7bit I2C address
+ sh_cfg_write.slv0_subadd = reg,
+ sh_cfg_write.slv0_data = *data,
+ ret = lsm6dso_sh_cfg_write(&dev_ctx, &sh_cfg_write);
+
+ /* Disable accelerometer. */
+ lsm6dso_xl_data_rate_set(&dev_ctx, LSM6DSO_XL_ODR_OFF);
+
+ /* Enable I2C Master. */
+ lsm6dso_sh_master_set(&dev_ctx, PROPERTY_ENABLE);
+
+ /* Enable accelerometer to trigger Sensor Hub operation. */
+ lsm6dso_xl_data_rate_set(&dev_ctx, LSM6DSO_XL_ODR_104Hz);
+
+ /* Wait Sensor Hub operation flag set. */
+ lsm6dso_acceleration_raw_get(&dev_ctx, data_raw_acceleration.u8bit);
+ do
+ {
+ HAL_Delay(20);
+ lsm6dso_xl_flag_data_ready_get(&dev_ctx, &drdy);
+ } while (!drdy);
+
+ do
+ {
+ HAL_Delay(20);
+ lsm6dso_sh_status_get(&dev_ctx, &master_status);
+ } while (!master_status.sens_hub_endop);
+
+ /* Disable I2C master and XL (trigger). */
+ lsm6dso_sh_master_set(&dev_ctx, PROPERTY_DISABLE);
+ lsm6dso_xl_data_rate_set(&dev_ctx, LSM6DSO_XL_ODR_OFF);
+
+ return ret;
+}
+
+/*
+ * @brief Read lsm2mdl device register (used by configuration functions)
+ *
+ * @param handle customizable argument. In this examples is used in
+ * order to select the correct sensor bus handler.
+ * @param reg register to read
+ * @param bufp pointer to buffer that store the data read
+ * @param len number of consecutive register to read
+ *
+ */
+static int32_t lsm6dso_read_lps22hh_cx(void* ctx, uint8_t reg, uint8_t* data, uint16_t len)
+{
+ lsm6dso_sh_cfg_read_t sh_cfg_read;
+ axis3bit16_t data_raw_acceleration;
+ int32_t ret;
+ uint8_t drdy;
+ lsm6dso_status_master_t master_status;
+
+ /* Disable accelerometer. */
+ lsm6dso_xl_data_rate_set(&dev_ctx, LSM6DSO_XL_ODR_OFF);
+
+ // For each byte we need to read from the lps22hh
+ for (int i = 0; i < len; i++) {
+
+ /* Configure Sensor Hub to read LPS22HH. */
+ sh_cfg_read.slv_add = (LPS22HH_I2C_ADD_L &0xFEU) >> 1; /* 7bit I2C address */
+ sh_cfg_read.slv_subadd = reg+i;
+ sh_cfg_read.slv_len = 1;
+
+ // Call the command to read the data from the sensor hub.
+ // This data will be read from the device connected to the
+ // sensor hub, and saved into a register for us to read.
+ ret = lsm6dso_sh_slv0_cfg_read(&dev_ctx, &sh_cfg_read);
+ lsm6dso_sh_slave_connected_set(&dev_ctx, LSM6DSO_SLV_0);
+
+ /* Enable I2C Master and I2C master. */
+ lsm6dso_sh_master_set(&dev_ctx, PROPERTY_ENABLE);
+
+ /* Enable accelerometer to trigger Sensor Hub operation. */
+ lsm6dso_xl_data_rate_set(&dev_ctx, LSM6DSO_XL_ODR_104Hz);
+
+ /* Wait Sensor Hub operation flag set. */
+ lsm6dso_acceleration_raw_get(&dev_ctx, data_raw_acceleration.u8bit);
+ do {
+ HAL_Delay(20);
+ lsm6dso_xl_flag_data_ready_get(&dev_ctx, &drdy);
+ } while (!drdy);
+
+ do {
+ HAL_Delay(20);
+ lsm6dso_sh_status_get(&dev_ctx, &master_status);
+ } while (!master_status.sens_hub_endop);
+
+ /* Disable I2C master and XL(trigger). */
+ lsm6dso_sh_master_set(&dev_ctx, PROPERTY_DISABLE);
+ lsm6dso_xl_data_rate_set(&dev_ctx, LSM6DSO_XL_ODR_OFF);
+
+ // Read the data from the device. The call below reads
+ // all 18 sensor hub data. We just need the data from
+ // sensor hub 1, so copy that into our data array.
+ uint8_t buffer[18];
+ lsm6dso_sh_read_data_raw_get(&dev_ctx, buffer);
+ data[i] = buffer[0];
+
+#ifdef ENABLE_READ_WRITE_DEBUG
+ Log_Debug("Read %d bytes: ", len);
+ for (int i = 0; i < len; i++) {
+ Log_Debug("[%0x] ", data[i]);
+ }
+ Log_Debug("\n", len);
+#endif
+ }
+
+ /* Re-enable accelerometer */
+ lsm6dso_xl_data_rate_set(&dev_ctx, LSM6DSO_XL_ODR_104Hz);
+
+ return ret;
+}
diff --git a/Samples/AzureIoT/i2cDevice.h b/Samples/AzureIoT/i2cDevice.h
new file mode 100755
index 0000000..0456f6c
--- /dev/null
+++ b/Samples/AzureIoT/i2cDevice.h
@@ -0,0 +1,10 @@
+#pragma once
+
+#include <stdbool.h>
+//#include "epoll_timerfd_utilities.h"
+
+#define LSM6DSO_ID 0x6C // register value
+#define LSM6DSO_ADDRESS 0x6A // I2C Address
+
+int initI2cDevice(void);
+void closeI2cDevice(void);
\ No newline at end of file
diff --git a/Samples/AzureIoT/lps22hh_reg.c b/Samples/AzureIoT/lps22hh_reg.c
new file mode 100755
index 0000000..33f52c8
--- /dev/null
+++ b/Samples/AzureIoT/lps22hh_reg.c
@@ -0,0 +1,1832 @@
+/*
+ ******************************************************************************
+ * @file lps22hh_reg.c
+ * @author Sensors Software Solution Team
+ * @brief LPS22HH driver file
+ ******************************************************************************
+ * @attention
+ *
+ * <h2><center>© COPYRIGHT(c) 2018 STMicroelectronics</center></h2>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. 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.
+ * 3. Neither the name of STMicroelectronics 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 "lps22hh_reg.h"
+
+/**
+ * @defgroup LPS22HH
+ * @brief This file provides a set of functions needed to drive the
+ * lps22hh enhanced inertial module.
+ * @{
+ *
+ */
+
+/**
+ * @defgroup LPS22HH_Interfaces_Functions
+ * @brief This section provide a set of functions used to read and
+ * write a generic register of the device.
+ * MANDATORY: return 0 -> no Error.
+ * @{
+ *
+ */
+
+/**
+ * @brief Read generic device register
+ *
+ * @param ctx read / write interface definitions(ptr)
+ * @param reg register to read
+ * @param data pointer to buffer that store the data read(ptr)
+ * @param len number of consecutive register to read
+ * @retval interface status (MANDATORY: return 0 -> no Error)
+ *
+ */
+int32_t lps22hh_read_reg(lps22hh_ctx_t* ctx, uint8_t reg, uint8_t* data,
+ uint16_t len)
+{
+ int32_t ret;
+ ret = ctx->read_reg(ctx->handle, reg, data, len);
+ return ret;
+}
+
+/**
+ * @brief Write generic device register
+ *
+ * @param ctx read / write interface definitions(ptr)
+ * @param reg register to write
+ * @param data pointer to data to write in register reg(ptr)
+ * @param len number of consecutive register to write
+ * @retval interface status (MANDATORY: return 0 -> no Error)
+ *
+ */
+int32_t lps22hh_write_reg(lps22hh_ctx_t* ctx, uint8_t reg, uint8_t* data,
+ uint16_t len)
+{
+ int32_t ret;
+ ret = ctx->write_reg(ctx->handle, reg, data, len);
+ return ret;
+}
+
+/**
+ * @}
+ *
+ */
+
+/**
+ * @defgroup LPS22HH_Sensitivity
+ * @brief These functions convert raw-data into engineering units.
+ * @{
+ *
+ */
+float_t lps22hh_from_lsb_to_hpa(uint32_t lsb)
+{
+ return ( (float_t) lsb / 4096.0f );
+}
+
+float_t lps22hh_from_lsb_to_celsius(int16_t lsb)
+{
+ return ( (float_t) lsb / 100.0f );
+}
+
+/**
+ * @}
+ *
+ */
+
+/**
+ * @defgroup LPS22HH_Data_Generation
+ * @brief This section groups all the functions concerning
+ * data generation.
+ * @{
+ *
+ */
+
+/**
+ * @brief Reset Autozero function.[set]
+ *
+ * @param ctx read / write interface definitions
+ * @param val change the values of reset_az in reg INTERRUPT_CFG
+ * @retval interface status (MANDATORY: return 0 -> no Error)
+ *
+ */
+int32_t lps22hh_autozero_rst_set(lps22hh_ctx_t *ctx, uint8_t val)
+{
+ lps22hh_interrupt_cfg_t reg;
+ int32_t ret;
+
+ ret = lps22hh_read_reg(ctx, LPS22HH_INTERRUPT_CFG, (uint8_t*) ®, 1);
+ if (ret == 0) {
+ reg.reset_az = val;
+ ret = lps22hh_write_reg(ctx, LPS22HH_INTERRUPT_CFG, (uint8_t*) ®, 1);
+ }
+ return ret;
+}
+
+/**
+ * @brief Reset Autozero function.[get]
+ *
+ * @param ctx read / write interface definitions
+ * @param val change the values of reset_az in reg INTERRUPT_CFG
+ * @retval interface status (MANDATORY: return 0 -> no Error)
+ *
+ */
+int32_t lps22hh_autozero_rst_get(lps22hh_ctx_t *ctx, uint8_t *val)
+{
+ lps22hh_interrupt_cfg_t reg;
+ int32_t ret;
+
+ ret = lps22hh_read_reg(ctx, LPS22HH_INTERRUPT_CFG, (uint8_t*) ®, 1);
+ *val = reg.reset_az;
+
+ return ret;
+}
+
+/**
+ * @brief Enable Autozero function.[set]
+ *
+ * @param ctx read / write interface definitions
+ * @param val change the values of autozero in reg INTERRUPT_CFG
+ * @retval interface status (MANDATORY: return 0 -> no Error)
+ *
+ */
+int32_t lps22hh_autozero_set(lps22hh_ctx_t *ctx, uint8_t val)
+{
+ lps22hh_interrupt_cfg_t reg;
+ int32_t ret;
+
+ ret = lps22hh_read_reg(ctx, LPS22HH_INTERRUPT_CFG, (uint8_t*) ®, 1);
+ if (ret == 0) {
+ reg.autozero = val;
+ ret = lps22hh_write_reg(ctx, LPS22HH_INTERRUPT_CFG, (uint8_t*) ®, 1);
+ }
+ return ret;
+}
+
+/**
+ * @brief Enable Autozero function.[get]
+ *
+ * @param ctx read / write interface definitions
+ * @param val change the values of autozero in reg INTERRUPT_CFG
+ * @retval interface status (MANDATORY: return 0 -> no Error)
+ *
+ */
+int32_t lps22hh_autozero_get(lps22hh_ctx_t *ctx, uint8_t *val)
+{
+ lps22hh_interrupt_cfg_t reg;
+ int32_t ret;
+
+ ret = lps22hh_read_reg(ctx, LPS22HH_INTERRUPT_CFG, (uint8_t*) ®, 1);
+ *val = reg.autozero;
+
+ return ret;
+}
+
+/**
+ * @brief Reset AutoRifP function.[set]
+ *
+ * @param ctx read / write interface definitions
+ * @param val change the values of reset_arp in reg INTERRUPT_CFG
+ * @retval interface status (MANDATORY: return 0 -> no Error)
+ *
+ */
+int32_t lps22hh_pressure_snap_rst_set(lps22hh_ctx_t *ctx, uint8_t val)
+{
+ lps22hh_interrupt_cfg_t reg;
+ int32_t ret;
+
+ ret = lps22hh_read_reg(ctx, LPS22HH_INTERRUPT_CFG, (uint8_t*) ®, 1);
+ if (ret == 0) {
+ reg.reset_arp = val;
+ ret = lps22hh_write_reg(ctx, LPS22HH_INTERRUPT_CFG, (uint8_t*) ®, 1);
+ }
+ return ret;
+}
+
+/**
+ * @brief Reset AutoRifP function.[get]
+ *
+ * @param ctx read / write interface definitions
+ * @param val change the values of reset_arp in reg INTERRUPT_CFG
+ * @retval interface status (MANDATORY: return 0 -> no Error)
+ *
+ */
+int32_t lps22hh_pressure_snap_rst_get(lps22hh_ctx_t *ctx, uint8_t *val)
+{
+ lps22hh_interrupt_cfg_t reg;
+ int32_t ret;
+
+ ret = lps22hh_read_reg(ctx, LPS22HH_INTERRUPT_CFG, (uint8_t*) ®, 1);
+ *val = reg.reset_arp;
+
+ return ret;
+}
+
+/**
+ * @brief Enable AutoRefP function.[set]
+ *
+ * @param ctx read / write interface definitions
+ * @param val change the values of autorefp in reg INTERRUPT_CFG
+ * @retval interface status (MANDATORY: return 0 -> no Error)
+ *
+ */
+int32_t lps22hh_pressure_snap_set(lps22hh_ctx_t *ctx, uint8_t val)
+{
+ lps22hh_interrupt_cfg_t reg;
+ int32_t ret;
+
+ ret = lps22hh_read_reg(ctx, LPS22HH_INTERRUPT_CFG, (uint8_t*) ®, 1);
+ if (ret == 0) {
+ reg.autorefp = val;
+ ret = lps22hh_write_reg(ctx, LPS22HH_INTERRUPT_CFG, (uint8_t*) ®, 1);
+ }
+ return ret;
+}
+
+/**
+ * @brief Enable AutoRefP function.[get]
+ *
+ * @param ctx read / write interface definitions
+ * @param val change the values of autorefp in reg INTERRUPT_CFG
+ * @retval interface status (MANDATORY: return 0 -> no Error)
+ *
+ */
+int32_t lps22hh_pressure_snap_get(lps22hh_ctx_t *ctx, uint8_t *val)
+{
+ lps22hh_interrupt_cfg_t reg;
+ int32_t ret;
+
+ ret = lps22hh_read_reg(ctx, LPS22HH_INTERRUPT_CFG, (uint8_t*) ®, 1);
+ *val = reg.autorefp;