Bug in nvmWrite()

[Mark Ruys]

I think we got a bug in mDot::nvmWrite(). This is my code:

#include "mDot.h"
#include "xdot_eeprom.h"

int main() {
    mDot *dot = mDot::getInstance();

    uint8_t data[1];
    data[0] = 33;

    if ( ! dot->nvmWrite(37, data, 1) ) {
        printf("nvmWrite() failed\r\n");
    }

    if ( ! dot->nvmRead(37, data, 1) ) {
        printf("nvmRead() failed\r\n");
    }
    printf("Read %d\r\n", data[0]);

    data[0] = 33;
    if ( xdot_eeprom_write_buf(37, data, 1) != 0 ) {
        printf("xdot_eeprom_write_buf() failed\r\n");
    }

    if ( ! dot->nvmWrite(37, data, 1) ) {
        printf("nvmWrite() failed\r\n");
    }

    while ( true ) { wait(1); }
}

This is the output:

nvmWrite() failed
Read 32

I expected 33 and no failure.

Work around is to use xdot_eeprom_write_buf() which works okay.

mbed-os 5.4.2 (139), libxDot-mbed5 2.0.17-mbed139

[Mark Ruys]

I’m sorry, it appeared to be a hardware issue after all. No bug.

Mark

[Author]

Posts