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Commit c23e95e

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Merge pull request #2298 from arduino/hannes7eicher/GIGA-RTC-M4
[PXCT-17] add RTC RPC example
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‎content/hardware/10.mega/boards/giga-r1-wifi/tutorials/giga-dual-core/giga-dual-core.md‎

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@@ -558,6 +558,94 @@ int servoMove(int angle) {
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}
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```
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### RTC RPC
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The Real-time Clock (RTC) can be accessed from the M4 core, and using RPC, we can read the values.
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In this example, we set the RTC to a specific date (can be adjusted in the example), send it to the M7 via RPC, and finally prints it out in the Serial Monitor using the M7 core.
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**M4 sketch:**
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```arduino
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/**
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* Initial author: Henatu (https://forum.arduino.cc/u/henatu/summary)
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* modified 03 December 2024
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* by Hannes Siebeneicher
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*/
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#include "mbed.h"
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#include <mbed_mktime.h>
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#include "RPC.h"
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constexpr unsigned long printInterval{ 1000 };
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unsigned long printNow{};
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void setup() {
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if (RPC.begin()) {
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RPC.println("M4: Reading the RTC.");
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RTCset(); //sets the RTC to start from a specific time & date
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}
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}
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void loop() {
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if (millis() > printNow) {
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RPC.print("M4 System Clock: ");
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RPC.println(getLocaltime());
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printNow = millis() + printInterval;
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}
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}
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String getLocaltime() {
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char buffer[32];
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tm t;
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_rtc_localtime(time(NULL), &t, RTC_4_YEAR_LEAP_YEAR_SUPPORT);
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strftime(buffer, 32, "%Y-%m-%d %k:%M:%S", &t);
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return String(buffer);
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}
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void RTCset() // Set cpu RTC
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{
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tm t;
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t.tm_sec = (0); // 0-59
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t.tm_min = (58); // 0-59
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t.tm_hour = (11); // 0-23
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t.tm_mday = (1); // 1-31
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t.tm_mon = (9); // 0-11 "0" = Jan, -1
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t.tm_year = ((24) + 100); // year since 1900, current year + 100 + 1900 = correct year
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set_time(mktime(&t)); // set RTC clock
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}
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```
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The M7 sketch is found below, and uses RPC to print out the incoming data from the M4.
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**M7 sketch:**
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```arduino
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/**
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* Initial author: Henatu (https://forum.arduino.cc/u/henatu/summary)
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* modified 03 December 2024
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* by Hannes Siebeneicher
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*/
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#include "mbed.h"
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#include "RPC.h"
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void setup() {
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RPC.begin();
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Serial.begin(9600);
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while (!Serial) {
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; // Wait for Serial (USB) connection
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}
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Serial.println("M7: Serial connection initiated");
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}
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void loop() {
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if (RPC.available()) {
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char incomingByte = RPC.read(); // Read byte from RPC
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Serial.write(incomingByte); // Forward the byte to Serial (USB)
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}
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}
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```
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### MicroPython RPC LED
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This example demonstrates how to use MicroPython (running on the M7 core) to remotely control an LED from the M4 core.

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