Zoltan Hudak
Example of using the HSCDTD008A Geomagnetic Sensor.
Revision 0:5090d2766d5e, committed 2021-06-20
- Comitter:
- hudakz
- Date:
- Sun Jun 20 13:56:50 2021 +0000
- Child:
- 1:2d4aa9e794a5
- Commit message:
- Example of using the HSCDTD008A Geomagnetic Sensor.
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/.gitignore Sun Jun 20 13:56:50 2021 +0000 @@ -0,0 +1,4 @@ +.build +.mbed +projectfiles +*.py*
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/CONTRIBUTING.md Sun Jun 20 13:56:50 2021 +0000 @@ -0,0 +1,5 @@ +# Contributing to Mbed OS + +Mbed OS is an open-source, device software platform for the Internet of Things. Contributions are an important part of the platform, and our goal is to make it as simple as possible to become a contributor. + +To encourage productive collaboration, as well as robust, consistent and maintainable code, we have a set of guidelines for [contributing to Mbed OS](https://os.mbed.com/docs/mbed-os/latest/contributing/index.html).
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/HSCDTD008A.lib Sun Jun 20 13:56:50 2021 +0000 @@ -0,0 +1,1 @@ +https://os.mbed.com/users/hudakz/code/HSCDTD008A/#ccf912737de7
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/README.md Sun Jun 20 13:56:50 2021 +0000 @@ -0,0 +1,64 @@ + +# Blinky Mbed OS example + +The example project is part of the [Arm Mbed OS Official Examples](https://os.mbed.com/code/) and is the [getting started example for Mbed OS](https://os.mbed.com/docs/mbed-os/v5.14/quick-start/index.html). It contains an application that repeatedly blinks an LED on supported [Mbed boards](https://os.mbed.com/platforms/). + +You can build the project with all supported [Mbed OS build tools](https://os.mbed.com/docs/mbed-os/latest/tools/index.html). However, this example project specifically refers to the command-line interface tool [Arm Mbed CLI](https://github.com/ARMmbed/mbed-cli#installing-mbed-cli). +(Note: To see a rendered example you can import into the Arm Online Compiler, please see our [import quick start](https://os.mbed.com/docs/mbed-os/latest/quick-start/online-with-the-online-compiler.html#importing-the-code).) + +1. [Install Mbed CLI](https://os.mbed.com/docs/mbed-os/latest/quick-start/offline-with-mbed-cli.html). + +1. Clone this repository on your system, and change the current directory to where the project was cloned: + + ```bash + $ git clone git@github.com:armmbed/mbed-os-example-blinky && cd mbed-os-example-blinky + ``` + + Alternatively, you can download the example project with Arm Mbed CLI using the `import` subcommand: + + ```bash + $ mbed import mbed-os-example-blinky && cd mbed-os-example-blinky + ``` + + +## Application functionality + +The `main()` function is the single thread in the application. It toggles the state of a digital output connected to an LED on the board. + +## Building and running + +1. Connect a USB cable between the USB port on the board and the host computer. +2. <a name="build_cmd"></a> Run the following command to build the example project and program the microcontroller flash memory: + ```bash + $ mbed compile -m <TARGET> -t <TOOLCHAIN> --flash + ``` +The binary is located at `./BUILD/<TARGET>/<TOOLCHAIN>/mbed-os-example-blinky.bin`. + +Alternatively, you can manually copy the binary to the board, which you mount on the host computer over USB. + +Depending on the target, you can build the example project with the `GCC_ARM`, `ARM` or `IAR` toolchain. After installing Arm Mbed CLI, run the command below to determine which toolchain supports your target: + +```bash +$ mbed compile -S +``` + +## Expected output +The LED on your target turns on and off every 500 milliseconds. + + +## Troubleshooting +If you have problems, you can review the [documentation](https://os.mbed.com/docs/latest/tutorials/debugging.html) for suggestions on what could be wrong and how to fix it. + +## Related Links + +* [Mbed OS Stats API](https://os.mbed.com/docs/latest/apis/mbed-statistics.html). +* [Mbed OS Configuration](https://os.mbed.com/docs/latest/reference/configuration.html). +* [Mbed OS Serial Communication](https://os.mbed.com/docs/latest/tutorials/serial-communication.html). +* [Mbed OS bare metal](https://os.mbed.com/docs/mbed-os/latest/reference/mbed-os-bare-metal.html). +* [Mbed boards](https://os.mbed.com/platforms/). + +### License and contributions + +The software is provided under Apache-2.0 license. Contributions to this project are accepted under the same license. Please see contributing.md for more info. + +This project contains code from other projects. The original license text is included in those source files. They must comply with our license guide.
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Sun Jun 20 13:56:50 2021 +0000
@@ -0,0 +1,92 @@
+#include "mbed.h"
+#include "HSCDTD008A.h"
+
+#define M_PI 3.14159265358979323846
+
+HSCDTD008A compass(PB_7, PB_6, PA_8);
+Watchdog& watchdog = Watchdog::get_instance();
+
+int main()
+{
+ float x_sum;
+ float y_sum;
+ float z_sum;
+ float x_avg;
+ float y_avg;
+ float z_avg;
+ float bearing;
+
+ printf("Starting selftest.. ");
+ if (compass.selftest() == OK) {
+ printf("passed\r\n");
+ }
+ else {
+ printf("failed\r\n");
+ }
+
+ printf("Calibrating offsets.. ");
+ compass.calibrateOffsets();
+
+ printf("done\r\n");
+
+ printf("Compensating temperature.. ");
+ compass.compensateTemp();
+ printf("done\r\n");
+
+ ThisThread::sleep_for(1000ms);
+
+ compass.setResolution(true); // set 15bit resolution
+ printf("res = %d\r\n", compass.getResolution());
+
+ compass.enableFifo();
+ compass.normalMode(0b10);
+
+ watchdog.start(3000); // clears WDTOF
+
+ while (true) {
+ printf("-----------------\r\n");
+ printf("Measuring.. \r\n");
+
+ if (compass.isFifoFull()) {
+ watchdog.kick();
+
+ //printf("FIFO pointer = %d\r\n", compass.fifoPointer());
+ //printf("FIFO full = %d\r\n", compass.isFifoFull());
+
+ // get data and calculate sums
+ x_sum = 0;
+ y_sum = 0;
+ z_sum = 0;
+
+ for (uint8_t i = 0; i < 8; i++) {
+ compass.readData();
+ x_sum += compass.x();
+ y_sum += compass.y();
+ z_sum += compass.z();
+ }
+
+ // calculate averages
+ x_avg = x_sum / 8;
+ y_avg = y_sum / 8;
+ z_avg = z_sum / 8;
+
+ //printf("FIFO pointer = %d\r\n", compass.fifoPointer());
+ //printf("FIFO full = %d\r\n", compass.isFifoFull());
+ //printf("\r\n");
+
+ printf("x_avg = %f\r\n", x_avg);
+ printf("y_avg = %f\r\n", y_avg);
+ printf("z_avg = %f\r\n", z_avg);
+ printf("\r\n");
+
+ bearing = atan2(y_avg, x_avg) * 180 / M_PI;
+ if (bearing < 0) {
+ bearing = 360 + bearing;
+ };
+
+ printf("bearing = %f\r\n", bearing);
+ }
+
+ ThisThread::sleep_for(1s);
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-os.lib Sun Jun 20 13:56:50 2021 +0000 @@ -0,0 +1,1 @@ +https://github.com/ARMmbed/mbed-os/#14e5d307bb6cdccb554b591ab2602d8d47e0b2d0
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed_app.json Sun Jun 20 13:56:50 2021 +0000
@@ -0,0 +1,11 @@
+{
+ "target_overrides": {
+ "*": {
+ "platform.callback-nontrivial": true,
+ "platform.stdio-baud-rate": 115200,
+ "target.macros_remove": ["MBED_TICKLESS"],
+ "target.c_lib": "std",
+ "target.printf_lib": "std"
+ }
+ }
+}
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