Function pointer in MBEDOS6

Mbed OS
1

Greetings,

I’m trying to port a library to mbed os6, but I can’t find what is the equivalent of “FunctionPointer”

Do you have any idea ?

Many thanks

2

Hello,

that is very old but probably the Callback API.

FunctionPointer has been replaced by Callback<void()> [since mbed-os-5.1]

BR, Jan

3

Many thanks,
do you also know how to replace the serial ?

(here is the lib i’m trying to adapt MTK3339 | Mbed)

4

BufferedSerial or UnbufferedSerial, but because the implementation inside the library use interrupts then you need the UnbufferedSerial.

These new APIs not use standart methods - getc, putc, printf and so on. So take care about void MTK3339::uartIrq()

This maybe help
https://forums.mbed.com/t/mbed-os-6-5-serial/11166/2?u=johnnyk

BR, Jan

5

I see,

Yes It was my problem, I tried with unbufferd serial but got a problem with putc. I will look at it and tell you if I got something.

6

Well now I can compile it without any error,

I still have an other problem. When I compile my code, the nucleo send me the following message :

“Mutex, Not allowed in ISR context”.

I’ve seen that this might be caused by a printf in ISR but I don’t think it’s my case

#include "mbed.h"

#include "MTK3339.h"

 

static int waitData = 0;

static MTK3339 gps(D8,D2);

 

static void dataAvailable() {

    waitData |= gps.getAvailableDataType();

}

 

int main(void) {

   

    gps.start(&dataAvailable, (MTK3339::NmeaGga|MTK3339::NmeaVtg));

 

    while(1) {

        while(waitData == 0);

        

        if ((waitData & MTK3339::NmeaGga) != 0) {

            waitData &= ~(MTK3339::NmeaGga);

            printf("gpa: fix=%d, sats=%d, alt=%f, lat=%f, lon=%f\n", 

                gps.gga.fix, gps.gga.satellites, gps.gga.altitude, 

                gps.getLatitudeAsDegrees(), gps.getLongitudeAsDegrees());            

        }

        if ((waitData & MTK3339::NmeaVtg) != 0) {

            waitData &= ~(MTK3339::NmeaVtg);

            printf("vtg: course=%f, speed=%f km/h, mode=%c\n", 

                gps.vtg.course, gps.vtg.speedKmHour, gps.vtg.mode);            

        }   

        

        waitData &= (MTK3339::NmeaGga|MTK3339::NmeaVtg);

    }

   

}
7

Not only by the printf, but all methods what manipulate with input/output. So also putc, getc and so on.
That is why you need UnbufferedSerial instead of BufferedSerial.

BR, Jan

8

Alternatively if you not need an RTOS functionality, you can try to use Mbed OS bare metal profile.
No RTOS = No Mutexes

BR, Jan

9

I’m not sure I have understood how to add No RTOS = No mutexes for the bare metal profile.

And do I just have to create a mbed_app.json and compile the projet to have a bare metal profile ?

Well, even with UnbufferedSerial, I still have the problem. Do I have to implement an EventQueue ? I’m not sure how to do that