Mbed OS - História úprav

Balogh na 09:55, 4. august 2023

2023-08-04T09:55:11Z

← Staršia verzia		Verzia z 09:55, 4. august 2023
Riadok 689:		Riadok 689:
	</source></tab>		</source></tab>
	</tabs>		</tabs>


			[[Category:ARM]]

Balogh: /* 1. Middle LED blinks */

2023-05-09T13:55:47Z

1. Middle LED blinks

← Staršia verzia		Verzia z 13:55, 9. máj 2023
Riadok 443:		Riadok 443:

	LEDs are connected into a matrix (see the image here: https://lancaster-university.github.io/microbit-docs/ubit/display/) - from the image it is clear that middle LED is 2.3, i.e. Row 2 and Column 3. To light it ON, we have to set Row to Log.1 and Column to Log. 0. Led OFF means both Row and Col set to 0. For definition of additional rows and columns see below.		LEDs are connected into a matrix (see the image here: https://lancaster-university.github.io/microbit-docs/ubit/display/) - from the image it is clear that middle LED is 2.3, i.e. Row 2 and Column 3. To light it ON, we have to set Row to Log.1 and Column to Log. 0. Led OFF means both Row and Col set to 0. For definition of additional rows and columns see below.


			[[Súbor:microBitDisplayLED.png]]

			On the micro:bit, the LED matrix has 25 LEDs. These LEDs are controlled by 12 GPIO pins. Three of those pins provide power to LEDs, the other nine provide a route to ground. The pins that source power are called rows. The pins that sink power are called columns. The following diagram shows how the 5x5 grid is connected into 3 logical 'rows' and 9 'columns':

	<tabs>		<tabs>
Riadok 490:		Riadok 495:
	#define Row3 P0_15		#define Row3 P0_15


			So, if we wanted to light up the middle LED, we would need to put a HIGH voltage (logic 1) on row 2, and a LOW voltage (logic 0) on column 3. Notice that when row 2 is HIGH, we the value we write to the 9 column pins affect all of the LEDs 2.1 to 2.7, without affecting any of the LEDS on row 1 or row 3. Sharing GPIO pins in this way is known as multiplexing. Moreover, if we scan through the different rows fast enough - faster than the eye can see - then we can provide the illusion of all the LEDS being on at the same time! This is a technique known as persistence of vision...

	=== 2. Simple Hello, World ===		=== 2. Simple Hello, World ===

Balogh: /* 1. Middle LED blinks */

2023-05-09T12:38:06Z

1. Middle LED blinks

Zobraziť rozdiely

Balogh: /* Examples */

2023-05-09T12:06:49Z

Examples

@@ Riadok 440: / Riadok 440: @@
-=== 1. Middle LED  blinks
+=== 1. Middle LED  blinks ===
 LEDs are connected into a matrix (see the image here: https://lancaster-university.github.io/microbit-docs/ubit/display/)
@@ Riadok 446: / Riadok 446: @@
 and Column  to Log. 0. Led OFF means both Row and Col set to 0.
@@ Riadok 475: / Riadok 476: @@
 </source></tab>
 </tabs>

Balogh: /* Examples */

2023-05-09T12:00:51Z

Examples

← Staršia verzia		Verzia z 12:00, 9. máj 2023
Riadok 435:		Riadok 435:

	== '''Examples''' ==		== '''Examples''' ==


			Following is a set of examples which should work on ANY arm based board, including micro:bit without need for any specialized libraries.


			=== 1. Middle LED blinks

			LEDs are connected into a matrix (see the image here: https://lancaster-university.github.io/microbit-docs/ubit/display/)
			- from the image it is clear that middle LED is 2.3, i.e. Row 2 and Column 3. To light it ON, we have to set Row to Log.1
			and Column to Log. 0. Led OFF means both Row and Col set to 0.



			<tabs>
			<tab name="AVR C-code"><source lang="c++" style="background: LightYellow;">
			#include "mbed.h"

			#define Row2 P0_14
			#define Col3 P0_6

			/* len mbed.h */
			DigitalOut row2(P0_14); // priama definicia
			DigitalOut col(Col3); // detto s vyuzitim pseudopremennej Col3

			int main()
			{
			while(1) {
			/* len mbed.h */
			row2 = 1;
			col = 0;
			wait(0.25);

			row2 = 0;
			col = 0;
			wait(0.25);

			}
			}
			</source></tab>
			</tabs>

Balogh na 11:55, 9. máj 2023

2023-05-09T11:55:25Z

← Staršia verzia		Verzia z 11:55, 9. máj 2023
Riadok 222:		Riadok 222:
	https://stackoverflow.com/questions/47580207/using-config-json-file-with-bbc-microbit-mbed-online-compiler		https://stackoverflow.com/questions/47580207/using-config-json-file-with-bbc-microbit-mbed-online-compiler

	=== i2c na micro:bit ==		=== i2c na micro:bit ===

	* API: https://os.mbed.com/docs/mbed-os/v6.15/apis/i2c.html		* API: https://os.mbed.com/docs/mbed-os/v6.15/apis/i2c.html
Riadok 381:		Riadok 381:
	</source>		</source>

	=== Priklad na meranie baterie (neodskusany) ==		=== Priklad na meranie baterie (neodskusany) ===

	* https://os.mbed.com/users/MarceloSalazar/notebook/measuring-battery-voltage-with-nordic-nrf51x/		* https://os.mbed.com/users/MarceloSalazar/notebook/measuring-battery-voltage-with-nordic-nrf51x/
Riadok 425:		Riadok 425:


			=== DMA praca s pamatou ===
	== DMA praca s pamatou ==

	Neodskusane, je to opisane pre RPi, ale malo by to fungovat aspon principialne.		Neodskusane, je to opisane pre RPi, ale malo by to fungovat aspon principialne.
	Treba prestudovat: https://people.ece.cornell.edu/land/courses/ece4760/RP2040/C_SDK_DMA_machine/DMA_machine_rp2040.html		Treba prestudovat: https://people.ece.cornell.edu/land/courses/ece4760/RP2040/C_SDK_DMA_machine/DMA_machine_rp2040.html





			== '''Examples''' ==

Balogh: /* Príklady */

2023-05-09T11:54:17Z

Príklady

← Staršia verzia		Verzia z 11:54, 9. máj 2023
Riadok 45:		Riadok 45:


	== Príklady ==		== '''Príklady''' ==

	Zoznam príkladov a návodov, ktoré by sa dali využiť a testovať na micro:bit alebo iný vhodný dev Kit.		Zoznam príkladov a návodov, ktoré by sa dali využiť a testovať na micro:bit alebo iný vhodný dev Kit.
Riadok 221:		Riadok 221:
	Priklad na radio RX a TX cez mBed, ale je tam aj dolezity konfiguracny subor mbed_app.json		Priklad na radio RX a TX cez mBed, ale je tam aj dolezity konfiguracny subor mbed_app.json
	https://stackoverflow.com/questions/47580207/using-config-json-file-with-bbc-microbit-mbed-online-compiler		https://stackoverflow.com/questions/47580207/using-config-json-file-with-bbc-microbit-mbed-online-compiler



	=== i2c na micro:bit ==		=== i2c na micro:bit ==

Balogh: /* ADC demo + serial */

2023-01-29T08:06:47Z

ADC demo + serial

← Staršia verzia		Verzia z 08:06, 29. január 2023
Riadok 425:		Riadok 425:
	}		}
	</source>		</source>



			== DMA praca s pamatou ==

			Neodskusane, je to opisane pre RPi, ale malo by to fungovat aspon principialne.
			Treba prestudovat: https://people.ece.cornell.edu/land/courses/ece4760/RP2040/C_SDK_DMA_machine/DMA_machine_rp2040.html

Balogh na 06:16, 29. júl 2022

2022-07-29T06:16:13Z

← Staršia verzia		Verzia z 06:16, 29. júl 2022
Riadok 33:		Riadok 33:

	* https://simulator.mbed.com/		* https://simulator.mbed.com/

			NOTE: The hosted Mbed simulator will stop running from December 2022. You can continue to use the simulator locally or host your own version by following these instructions:
			https://github.com/ARMmbed/mbed-simulator#readme


			== Courses & Tutorials ==

			* https://courses.edx.org/courses/course-v1:ArmEducation+EDARMXES1.6x+3T2020/7c46ec78a5b640ecb721b9ca5bc285f9/
			* https://os.mbed.com/blog/entry/introducing-mbed-simulator/

Balogh: /* = i2c na micro:bit */

2022-06-12T16:55:03Z

= i2c na micro:bit

← Staršia verzia		Verzia z 16:55, 12. jún 2022
Riadok 219:		Riadok 219:
	* API: https://os.mbed.com/docs/mbed-os/v6.15/apis/i2c.html		* API: https://os.mbed.com/docs/mbed-os/v6.15/apis/i2c.html
	* Handbook: https://os.mbed.com/handbook/I2C		* Handbook: https://os.mbed.com/handbook/I2C
			* Nazvy pinov tu: https://github.com/lancaster-university/mbed-classic/blob/master/targets/hal/TARGET_NORDIC/TARGET_MCU_NRF51822/TARGET_NRF51_MICROBIT/PinNames.h

	Tento kod je jednoduchy i2c scanner, ukazuje aj tie moznosti, ktore nefunguju		Tento kod je jednoduchy i2c scanner, ukazuje aj tie moznosti, ktore nefunguju
Riadok 372:		Riadok 373:
	}		}
	</source>		</source>



	=== Priklad na meranie baterie (neodskusany) ==		=== Priklad na meranie baterie (neodskusany) ==