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Flow control with three threats Blinking LEDs in the main and a thread for the led. Reading analog input with 12 bits and calculating moving average in a thread for the potentiometer connect: D10 - 330 Ohm - LED - GND D11 - 330 Ohm - LED - GND GND - Pot 1 A3 - Pot 2 Vcc - Pot 3 Tested with Nucleo-L432KC but should work with almost any board Thanks to "mbed-os-Flow-Control_Thread" example and AnalogIn API Reference Timo Karppinen 25.6.2020, Apache 2.0
Flow control with three threats Blinking LEDs in the main and a thread for the led. Reading analog input with 12 bits and calculating moving average in a thread for the potentiometer connect: D10 - 330 Ohm - LED - GND D11 - 330 Ohm - LED - GND GND - Pot 1 A3 - Pot 2 Vcc - Pot 3
Tested with Nucleo-L432KC but should work with almost any board
Thanks to "mbed-os-Flow-Control_Thread" example and AnalogIn API Reference Timo Karppinen 25.6.2020, Apache 2.0
Revision 0:156098cfb039, committed 2020-06-25
- Comitter:
- timo_k2
- Date:
- Thu Jun 25 15:51:09 2020 +0000
- Commit message:
- Flow control with three threats. Blinking LEDs in the main and a thread for the led. Reading analog input with 12 bits and calculating moving average in a thread for the potentiometer.
Changed in this revision
diff -r 000000000000 -r 156098cfb039 README.md --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/README.md Thu Jun 25 15:51:09 2020 +0000 @@ -0,0 +1,7 @@ +# Application Flow Control: Thread example +copied/forked from Mbed OS snippets "mbed-os-snippet-Flow-Control-Thread " 25.6.2020 + +A threaded Blinky implementation. +MIRRORED FROM MASTER EXAMPLE SNIPPETS REPOSITORY: mbed-os-examples-docs_only. + +Added a thread for potentiometer reading and value filtering. Works fine now with three threads.
diff -r 000000000000 -r 156098cfb039 main.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Thu Jun 25 15:51:09 2020 +0000 @@ -0,0 +1,80 @@ +/* Flow control with three threats +* Blinking LEDs in the main and a thread for the led. +* Reading analog input with 12 bits and calculating moving average in a thread for the potentiometer +* connect: +* D10 - 330 Ohm - LED - GND +* D11 - 330 Ohm - LED - GND +* GND - Pot 1 +* A3 - Pot 2 +* Vcc - Pot 3 +* +* Tested with Nucleo-L432KC but should work with almost any board +* +* Thanks to "mbed-os-Flow-Control_Thread" example and AnalogIn API Reference +* Timo Karppinen 25.6.2020, Apache 2.0 +*/ + +#include "mbed.h" + +DigitalOut led1(D10); +DigitalOut led2(D11); +AnalogIn pot1(A3); +#define numSamples 1024 + +Thread threadL; +Thread threadP; + +// Thread for the LED2. Sleeps for 1 second. +void led2_thread() +{ + while (true) { + led2 = !led2; + printf("Led2 blink %d \n", led2.read()); + + ThisThread::sleep_for(1000); + } +} + + +//Thread for the Pot. Sleeps for one millisecond in the middle of processing. +void pot1_thread() +{ + while(true) { + uint16_t pot1Samples[numSamples]; //unsigned short in the range [0x0, 0xFFFF], [0, 65535] + int sum; + int result; + + for (int i = 0; i < numSamples; i++) { + pot1Samples[i] = pot1.read_u16()/16; // normalized into range [0x0, 0xFFFF] and to 12 bit [0x0, 0xFFF] + //printf("Pot1 sample %d \n", pot1Samples[i]); // prints every sample + ThisThread::sleep_for(1); + } + printf("Results: "); // always the average of last samples + sum = 0; + for (int i = 0; i < numSamples; i++) { + sum = sum + pot1Samples[i]; + } + result = sum/numSamples; + printf("%d \n", result); + } +} + +// The main() is in it's own thread. +int main() +{ + // Create a thread to execute the function led2_thread + threadL.start(led2_thread); + // led2_thread is executing concurrently with the main and other threads + + + // Create a thread to execute the function pot1_thread + threadP.start(pot1_thread); + // pot1_thread is executing concurrently with the main and other threads + + + while (true) { + led1 = !led1; + printf("Led1 blink %d \n", led1.read()); + ThisThread::sleep_for(500); + } +}
diff -r 000000000000 -r 156098cfb039 mbed-os.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-os.lib Thu Jun 25 15:51:09 2020 +0000 @@ -0,0 +1,1 @@ +https://github.com/armmbed/mbed-os/