MCU SDK MKE04Z

[pauvilanova]

Hi,

I'm having trouble programming peripherals in the MKE04Z8VTG4 on MCUxpresso IDE. For instance there aren't any type of driver example on the freedom FRDM-KE04Z sdk builder, and moreover I cannot build a debug code because MKE04Z just has 8kb of flash and  building a out of the box hello world code in MCUxpresso already needs 10kb.

It's difficult to find any information related to sdk drivers/kinetis with MCUxpresso, is it because xpresso is relatively new? or is it that no one is working with it¿

I'm trying to code a simple adc in channel 1 of my MCU but it does not work. Enabling analog input at the begining just crashes my code. First with the sdk drivers I was testing with different configurations but the results were the same:

    ADC_EnableAnalogInput(ADC, kFTM_Chnl1Flag, true);

    adc_config_t adcConfigStruct;
    ADC_GetDefaultConfig(&adcConfigStruct);
    // Config ADC
    //adcConfigStruct.clockSource = kADC_ClockSourceAlt3;
    //adcConfigStruct.ResolutionMode = kADC_Resolution10BitMode;
    //adcConfigStruct.clockDivider = kADC_ClockDivider2;

    // Init ADC
    ADC_Init(base, &adcConfigStruct);

    // Conversion trigger selection.
    ADC_EnableHardwareTrigger(base, false);

    EnableIRQ(ADC_IRQn);

And then I tried with bits and the result is the same.

ADC->APCTL1 = ADC_APCTL1_ADPC(1);
    ADC->SC3 = ADC_SC3_MODE(0);
    ADC->SC2 = 0x00;
    ADC->SC1 = ADC_SC1_AIEN_MASK | ADC_SC1_ADCH(1);

If I don't enable the analog I/O the code runs and the interrupt works but the adc conversion does not give . So if anyone can give me a hint of what I'm supposed to do that would be great.

PD: I know to make an interrupt I have to do the following:

ADC_SetChannelConfig(ADC, &adcChannelConfigStruct);
where adcChannelConfigStruct contains: the channel I want to convert and the enable interrupt on conversion bit. The main problem is that my code gets stuck in the initialitzation of the ADC itself.

Thanks

[lpcxpresso_supp]

One "feature" of the MCUXpresso SDK codebase is that it contains a number of assert() checks to ensure that parameters are valid. When doing debug builds with MCUXpresso IDE, these assert() statements will cause a string containing the full filename (including the path) into your code. This can have a noticeable affect on the overall code size for your project when building the Debug build configuration - and with a small flash device can actually prevent the project building successfully.

However it is very easy to disable these assert() statements. To do this, go to:

• Project -> Properties -> C/C++ Build -> Settings -> MCU C Compiler -> Preprocessor

and add the define NDEBUG. Then try cleaning and rebuilding your project.

Another simple change to reduce code size is, if you are not going to use printf/semihosting for output (which on an 8KB flash device, you probably don't want to) is to change the C library variant that your project is linked against.

The simplest way to do this is to highlight your project in Project Explorer, then use:

• QuickStart Panel -> Miscellaneous -> Quick Settings -> Set library/header type -> Redlib(none)

[See chapter 15, "C/C++ Library Support" in the MCUXpresso IDE v10.2 User Guide for more details on this]

Regards,

MCUXpresso IDE Support

[ZhangJennie]

Hi Pau,

The default SDK demo code includes debug console initialization code and io print function. These part of codes are very memory consuming. So for this kind of limited memory chip, I suggest you remove debug console functions:

the SDK demo code includes ADC demo code. But from my testing the SDK importer for FRDM-KE04Z has problem. I contacted development team. I will let you know if it get fixed.

Have a great day,
TIC

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