lonesometraveler

#include "mbed.h"

int main() {
    Timer t;
    t.start();
    ThisThread::sleep_for(1s);
    t.stop();
    auto f = chrono::duration<float>(t.elapsed_time()).count();
    auto s = chrono::duration_cast<chrono::seconds>(t.elapsed_time()).count();
    auto ms = chrono::duration_cast<chrono::milliseconds>(t.elapsed_time()).count();

lonesometraveler

Mbed EthernetInterface and UART3 conflict on K64F

Due to a clock config conflict, the default config does not allow Ethernet and UART3 to be used at the same. See this thread.

A workaround for Mbed projects is to disable PORTC clock in mbed-os/features/netsocket/emac-drivers/TARGET_Freescale_EMAC/TARGET_K64F/hardware_init_MK64F12.c.

// CLOCK_EnableClock(kCLOCK_PortC);             // commented
CLOCK_EnableClock(kCLOCK_PortB);
/* Affects PORTC_PCR16 register */

lonesometraveler

#include "mbed.h"
// EventQueue
EventQueue *queue = mbed_event_queue();

// Create a DigitalOutput object to toggle an LED whenever data is received.
static DigitalOut led(LED1);

// Create a UnbufferedSerial object with a default baud rate.
static UnbufferedSerial serial_port(USBTX, USBRX);

lonesometraveler

// Execution of certain function in an ISR context is not safe. 
// For example, printf() in an interrupt context causes a Mutex error. 
// Using Mbed's EventQueue, you can defer execution of code from an interrupt context to a user context.
// More about EventQueue: https://os.mbed.com/docs/mbed-os/v5.15/tutorials/the-eventqueue-api.html

#include "mbed.h" 

Ticker ticker;
EventQueue *queue = mbed_event_queue(); // event queue
int counter = 0;

lonesometraveler

// Execution of certain function in an ISR context is not safe. 
// For example, printf() in an interrupt context causes a Mutex error. 
// Using Mbed's EventQueue, you can defer execution of code from an interrupt context to a user context.
// More about EventQueue: https://os.mbed.com/docs/mbed-os/v5.15/tutorials/the-eventqueue-api.html

#include "mbed.h"

EventQueue *queue = mbed_event_queue(); // event queue
RawSerial pc(USBTX, USBRX);