MPAE-8198: Updated Receive_Control_Commands code example

Author: cristinaionescu

.main-meta/main.json

@@ -4,7 +4,7 @@
     "content": {
         "metaDataVersion": "1.1.0",
         "name": "com.microchip.mcu8.studio.project.atmega4809-getting-started-with-usart-studio",
-        "version": "1.0.0",
+        "version": "1.0.1",
         "displayName": "Getting Started with USART",
         "projectName": "atmega4809-getting-started-with-usart-studio",
         "shortDescription": "This repository contains 5 bare metal code examples described in the TB3216-Getting Started with USART.",

README.md

@@ -3,7 +3,7 @@
 
 # Getting Started with Universal Synchronous and Asynchronous Receiver and Transmitter (USART) Examples (Microchip Studio)
 
-  This repository contains examples of bare metal source code for Universal Synchronous and Asynchronous Receiver and Transmitter (USART) as described in [TB3216-Universal Synchronous and Asynchronous Receiver and Transmitter (USART)](https://www.microchip.com/) document from Microchip. The repository contains an Microchip Studio Solution with multiple projects inside:
+  This repository contains examples of bare metal source code for Universal Synchronous and Asynchronous Receiver and Transmitter (USART) as described in [TB3216-Getting Started with USART](https://ww1.microchip.com/downloads/en/Appnotes/TB3216-Getting-Started-with-USART-90003216B.pdf) document from Microchip. The repository contains an Microchip Studio Solution with multiple projects inside:
 
   * [<strong>Send Hello World:</strong>](Send_Hello_World) This use case demonstrates how to send a string to the PC via serial communication using the USART peripheral (for more details, see [<strong>Send Hello World</strong>](Send_Hello_World)).
   * [<strong>Send Formatted Strings Using 'printf':</strong>](Send_Formatted_Strings_Using_Printf) This use case shows how to send formatted strings through USART. This example sends the value of a counter every 500 ms and then increases it (for more details, see [<strong> Send Fromatted Strings Using 'printf'</strong>](Send_Formatted_String_Using_Printf)).

Receive_Control_Commands/README.md

@@ -6,7 +6,7 @@
 This project shows how to use the Universal Synchronous and Asynchronous Receiver and Transmitter (USART) to implement a command line interface. This way, the microcontroller can receive control commands via the USART. It is convenient to use the line terminator `\r\n` as a command delimiter, so for this use case the USART will read full lines. The application can decode:
 - **'ON'** command and will turn on an LED and reply with **'OK, LED ON.\r\n'**
 - **'OFF'** command and will turn off an LED and reply with **'OK, LED OFF.\r\n'**
-- for any other command, it will reply with **'Incorrect command.\r\n'**
+- for any other command, it will reply with **'Type ON/OFF to control the LED.\r\n'**
 
 ## Related Documentation
 More details and code examples on the ATMEGA4809 can be found at the following links:
@@ -71,9 +71,12 @@ USART0 configuration:
 
 ## Demo
 
+Note: open the terminal before programming the device. The help command "Type ON/OFF to control the LED." will be received. 
+
 <br><img src="images/demo.png" width="500">
 
 In this demo, commands are sent via serial communication and the confirm messages are received in a terminal.
+<br>Right after initialization, the board sends the "Type ON/OFF to control the LED." message. Then, it follows the behavior described in the description of this README.
 
 ## Summary
 

Receive_Control_Commands/images/demo.png

@@ -22,11 +22,13 @@
 
 #define F_CPU 3333333
 #define USART1_BAUD_RATE(BAUD_RATE) ((float)(F_CPU * 64 / (16 * (float)BAUD_RATE)) + 0.5)
-#define MAX_COMMAND_LEN 8
+#define MAX_COMMAND_LEN		8
+#define INIT_DELAY			10	/* delay in ms */
 
 #include <avr/io.h>
 #include <stdio.h>
 #include <string.h>
+#include <util/delay.h>
 
 void USART1_init(void);
 void USART1_sendChar(char c);
@@ -41,7 +43,7 @@ void USART1_init(void)
 {
     PORTC.DIR &= ~PIN1_bm;
     PORTC.DIR |= PIN0_bm;
-    
+
     USART1.BAUD = (uint16_t)USART1_BAUD_RATE(9600);
 
     USART1.CTRLB |= USART_RXEN_bm | USART_TXEN_bm;
@@ -103,7 +105,7 @@ void executeCommand(char *command)
     } 
     else 
     {
-        USART1_sendString("Incorrect command.\r\n");
+        USART1_sendString("Type ON/OFF to control the LED.\r\n");
     }
 }
 
@@ -115,6 +117,10 @@ int main(void)
 
     LED_init();
     USART1_init();
+        
+    _delay_ms(INIT_DELAY); 
+        
+    USART1_sendString("Type ON/OFF to control the LED.\r\n");
 
     while (1)
     {