Jaydeep Shah / Mbed OS 9) PRINTF_USE_WITH_ISR

DEBUGG ISR LOOP : MUTEX GUARD PROTECTION LOCK USE SEMAPHORE FOR CALLING PROTECTED FUNCTIONS FROM ISR() BASIC OF SEMAPHORE FUNCTIONS /CREATION /& USE JAYDEEP SHAH - radhey04ec@gmail.com

Files at this revision

API Documentation at this revision

Revision 0:090c812cb33b, committed 2020-07-12

Comitter:
radhey04ec
Date:
Sun Jul 12 06:35:41 2020 +0000
Commit message:
PRINTF() WITH ISR ; SEMAPHORE BASIC USAGE; HOW HANDLE MUTEX GUARD FUNCTION WHEN call from ISR ??; ; JAYDEEP SHAH; radhey04ec@gmail.com;

Changed in this revision

.gitignore Show annotated file Show diff for this revision Revisions of this file
CONTRIBUTING.md Show annotated file Show diff for this revision Revisions of this file
README.md Show annotated file Show diff for this revision Revisions of this file
main.cpp Show annotated file Show diff for this revision Revisions of this file
mbed-os.lib Show annotated file Show diff for this revision Revisions of this file
resources/official_armmbed_example_badge.png Show annotated file Show diff for this revision Revisions of this file 
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/.gitignore	Sun Jul 12 06:35:41 2020 +0000
@@ -0,0 +1,4 @@
+.build
+.mbed
+projectfiles
+*.py*

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/CONTRIBUTING.md	Sun Jul 12 06:35:41 2020 +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/README.md	Sun Jul 12 06:35:41 2020 +0000
@@ -0,0 +1,64 @@
+![](./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.

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sun Jul 12 06:35:41 2020 +0000
@@ -0,0 +1,46 @@
+//USE OF PRINTF() STATEMENT IN MBED  WITH ISR
+
+//method : semaphore 
+
+/* NOTE : PRINTF() IS PART OF STDIO.H LIBRARY
+AND THIS LIBRARY PROTECTED BY MUTEX GUARD, SO YOU CAN NOT CALL PRINTF() FROM
+ISR FUNCTION.
+SIMPLE WAY IS USE SOMETYPE OF SIGNAL OR FLAG AND PRINTF() OUTSIDE ISR depends on 
+flag and signal  */
+
+//USE SERIAL TERMINAL WITH 9600 BAUD RATE  8-N-1 FORMAT
+
+//Created by : JAYDEEP SHAH  --radhey04ec@gmail.com
+
+
+//Library Added :::::
+#include "mbed.h"
+
+DigitalOut led(LED1);  // ON BOARD LED
+InterruptIn btn(USER_BUTTON);  // ON BOARD BUTTON  PORT PC_13 
+//INTERRUPT REGISTERATION
+
+Semaphore updates(0);  //SEMAPHORE OBJECT CREATE = SHARE RESOURCE 0
+//NO SHARE RESOURCE ONLY ISR
+
+void do_something() {        //ISR FUNCTION
+  // release the semaphore
+  updates.release();   // NOW V=1
+}
+
+int main() {
+  btn.fall(&do_something);
+
+  while (1) {
+    // wait for the semaphore to be released from the ISR
+    uint32_t v = updates.wait();    //RETURN STORE IN V
+
+    // now this runs on the main thread, and is safe
+    if(v == 1)
+    
+{
+      led = !led;    //LED TOGGLE
+      printf("Toggle LED!\r\n");  //SERIAL PRINT
+    }
+  }
+}
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-os.lib	Sun Jul 12 06:35:41 2020 +0000
@@ -0,0 +1,1 @@
+https://github.com/ARMmbed/mbed-os/#cf4f12a123c05fcae83fc56d76442015cb8a39e9

Binary file resources/official_armmbed_example_badge.png has changed