Hexiwear
Barometric pressure and temperature sensing program example for Hexiwear
Dependencies: MPL3115A2
Fork of
Hexi_barom_alt_temp_app
by 
Mac Lobdell
This project demonstrates the use of the MPL3115A2 pressure and temperature sensor embedded in hexiwear
Open a Hyperterminal tool on your computer and connect it to the "mbed Serial port (COMxx)" with Baud rate "9600bps"
Compile the project and copy the binary "Hexi_Pressure_Baro_Temp_Example_HEXIWEAR.bin" in the DAP-LINK drive from your computer file explorer Press the K64F-RESET button on the docking station to start the program on your board
Message "Begin Data Acquisition from MPL3115A2 sensor..." will appear in the Hyperterminal window
Then every 500ms the value of the pressure and the temperature will be displayed in the Hyperterminal window and the LED will blink Green
Revision 0:97dd02e37c94, committed 2016-08-13
- Comitter:
- maclobdell
- Date:
- Sat Aug 13 16:02:39 2016 +0000
- Child:
- 1:4cd4a1bd710b
- Commit message:
- initial simple example that prints to terminal
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/.gitignore Sat Aug 13 16:02:39 2016 +0000 @@ -0,0 +1,4 @@ +.build +.mbed +projectfiles +*.py*
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/MPL3115A2.lib Sat Aug 13 16:02:39 2016 +0000 @@ -0,0 +1,1 @@ +https://developer.mbed.org/users/clemente/code/MPL3115A2/#82ac06669316
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/README.md Sat Aug 13 16:02:39 2016 +0000 @@ -0,0 +1,96 @@ +# Getting started with Blinky on mbed OS + +This is a very simple guide, reviewing the steps required to get Blinky working on an mbed OS platform. + +Please install [mbed CLI](https://github.com/ARMmbed/mbed-cli#installing-mbed-cli). + +## Get the example application! + +From the command line, import the example: + +``` +mbed import mbed-os-example-blinky +cd mbed-os-example-blinky +``` + +### Now compile + +Invoke `mbed compile` specifying the name of your platform and your favorite toolchain (`GCC_ARM`, `ARM`, `IAR`). For example, for the ARM Compiler 5: + +``` +mbed compile -m K64F -t ARM +``` + +Your PC may take a few minutes to compile your code. At the end you should get the following result: + +``` +[snip] ++----------------------------+-------+-------+------+ +| Module | .text | .data | .bss | ++----------------------------+-------+-------+------+ +| Misc | 13939 | 24 | 1372 | +| core/hal | 16993 | 96 | 296 | +| core/rtos | 7384 | 92 | 4204 | +| features/FEATURE_IPV4 | 80 | 0 | 176 | +| frameworks/greentea-client | 1830 | 60 | 44 | +| frameworks/utest | 2392 | 512 | 292 | +| Subtotals | 42618 | 784 | 6384 | ++----------------------------+-------+-------+------+ +Allocated Heap: unknown +Allocated Stack: unknown +Total Static RAM memory (data + bss): 7168 bytes +Total RAM memory (data + bss + heap + stack): 7168 bytes +Total Flash memory (text + data + misc): 43402 bytes +Image: .\.build\K64F\ARM\mbed-os-example-blinky.bin +``` + +### Program your board + +1. Connect your mbed device to the computer over USB. +1. Copy the binary file to the mbed device . +1. Press the reset button to start the program. + +You should see the LED of your platform turning on and off. + +Congratulations if you managed to complete this test! + +## Export the project to Keil MDK and debug your application + +From the command line, run the following command: + +``` +mbed export -m K64F -i uvision +``` + +You should see the following output: + +``` +Successful exports: + * K64F::uvision .\projectfiles\uvision_K64F\Unnamed_Project +``` + +To debug the application: + +1. Start uVision. +1. Import the uVision project generated earlier. +1. Compile your application and generate an `.axf` file. +1. Make sure uVision is configured to debug over CMSIS-DAP (From the Project menu > Options for Target '...' > Debug tab > Use CMSIS-DAP Debugger). +1. Set breakpoints and start a debug session. + + + +## Troubleshooting + +1. Make sure `mbed-cli` is working correctly and its version is greater than `0.8.9` + + ``` + mbed --version + ``` + + If not, you can update it easily: + + ``` + pip install mbed-cli --upgrade + ``` + +2. If using Keil MDK, make sure you have a license installed. [MDK-Lite](http://www.keil.com/arm/mdk.asp) has a 32KB restriction on code size.
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Sat Aug 13 16:02:39 2016 +0000
@@ -0,0 +1,37 @@
+#include "mbed.h"
+#include "MPL3115A2.h"
+
+/* Check out the full featured example application for interfacing to the
+ * Barometer/Altimeter/Thermometer device at the following URL
+ * https://developer.mbed.org/users/clemente/code/WIGO_MPL3115A2/
+*/
+
+#define MPL3115A2_I2C_ADDRESS (0x60<<1)
+
+DigitalOut led1(LED1);
+
+// Pin connections for Hexiwear
+MPL3115A2 MPL3115A2( PTC11, PTC10, MPL3115A2_I2C_ADDRESS);
+/* pos [0] = altimeter or pressure value */
+/* pos [1] = temperature value */
+float sensor_data[2];
+
+// main() runs in its own thread in the OS
+// (note the calls to Thread::wait below for delays)
+int main() {
+
+
+ // Set over sampling value (see MPL3115A2.h for details)
+ MPL3115A2.Oversample_Ratio( OVERSAMPLE_RATIO_64);
+ // Configure the sensor as Barometer.
+ MPL3115A2.Barometric_Mode();
+
+ while (true) {
+
+ MPL3115A2.getAllData( &sensor_data[0]);
+ printf("\tPressure: %f\tTemperature: %f\r\n", sensor_data[0], sensor_data[1]);
+ led1 = !led1;
+ Thread::wait(500);
+ }
+}
+
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-os.lib Sat Aug 13 16:02:39 2016 +0000 @@ -0,0 +1,1 @@ +https://github.com/ARMmbed/mbed-os/#0712b8adf6bbc7eb796d5dac26f95d79d40745ef