Charles Tritt / Mbed OS 21_7segmentTest_v5

This is the initial version of my 7-segment hardware test and software demo project. This project will also be the starting point for the EE- 2905 Week 10 lab practical.

Files at this revision

API Documentation at this revision

Revision 109:86a37f0a397f, committed 2021-10-05

Comitter:
CSTritt
Date:
Tue Oct 05 05:00:06 2021 +0000
Parent:
108:eee3167b25b4
Child:
110:e80444a6fe3a
Commit message:
Correct error in pow function use.

Changed in this revision

CONTRIBUTING.md Show diff for this revision Revisions of this file
README.md Show diff for this revision Revisions of this file
main.cpp Show annotated file Show diff for this revision Revisions of this file 
--- a/CONTRIBUTING.md	Tue Sep 21 02:00:55 2021 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,5 +0,0 @@
-# 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).

--- a/README.md	Tue Sep 21 02:00:55 2021 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,64 +0,0 @@
-![](./resources/official_armmbed_example_badge.png)
-# 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.

--- a/main.cpp	Tue Sep 21 02:00:55 2021 +0000
+++ b/main.cpp	Tue Oct 05 05:00:06 2021 +0000
@@ -1,31 +1,45 @@
 /*
-    Project: BinaryCount
+    Project: Binary Counter Improved (while loop) Version
     File: main.cpp
     
-    Displays 8 bit binary count on bar graph display.
+    Displays 8-bit binary count on bar graph display. This version uses a while 
+    loop which provides a much better starting point for an Up/Down counter.
+    
+    Error in pow function use corrected in v. 1.0.
     
+    Note: I tried to use count for the loop counter but this resulted in an 
+    ambiguous name error.
+        
     Written by: Dr. C. S. Tritt
-    Created: 9/20/21 (v. 1.2)
+    Created: 9/27/21 (v. 1.0)
 */
 #include "mbed.h"
 
-BusOut barGraph(D2, D3, D4, D5, D6, D7, D8, D9);  // Create BusOut object.
+DigitalIn uB(USER_BUTTON); // Button is active low (up = 1, down = 0).
+const int bits = 4; // Number of bits to use.
+const int c_max = pow(2, bits) - 1; // Maximum count. pow is type double.
+const int sleepTime = 100; // Sleep time in milliseconds.
+int myCount = 0; // Count to be displayed. Loop counter.
+BusOut barGraph(D2, D3, D4, D5, D6, D7, D8, D9);  // The display.
 
 int main() {
     // Test the wiring.
-    barGraph = 0;  // All bars off (base 10).
     ThisThread::sleep_for(400); // For 0.4 seconds.
     barGraph = 0b01010101;  // Odd bars on (binary).
     ThisThread::sleep_for(400); // Test even bars for 0.4 seconds. 
     barGraph = 0b10101010;  // Even bars on (binary).   
     ThisThread::sleep_for(400); // Test even bars for 0.4 seconds.
     barGraph = 0xFF;  // All bars on. Hex.
-    ThisThread::sleep_for(400); // For 0.4 seconds.
-    // Enter main loop.   
+    ThisThread::sleep_for(400); // For 0.4 seconds.  
+
+    barGraph = myCount; // Initialize the display to myCount.
+    // Enter main loop. 
     while(true) {
-        for (int i = 0; i < 256; i++) { // Add one to count.
-            barGraph = i;  // Copy the count to the bargraph.
-            ThisThread::sleep_for(100);  // Display the value for 0.1 seconds.
+        while (myCount >= 0 && myCount <= c_max) {
+            barGraph = myCount; // Set display to myCount.
+            ThisThread::sleep_for(sleepTime);  // Display value for 0.1 seconds.
+            myCount++;
         }
+        myCount = 0;
     }
 }
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