topic Re: Use ADC Bandgap in KL27 in Kinetis Software Development Kit

Use ADC Bandgap in KL27

lokuate — Wed, 17 Jun 2015 00:32:49 GMT

Hi!

I'm using the reference code from the ADC16 driver example 'adc16_example_frdmkl27z' but cannot get correct conversions, I'm using the code:

pmc_bandgap_buffer_config_t pmcBandgapConfig = {

.enable = true,

};

// Enable BANDGAP reference voltage

PMC_HAL_BandgapBufferConfig(PMC_BASE_PTR, &pmcBandgapConfig);

ADC16_DRV_ConfigConvChn(FSL_ADCONV1, 0, &Vbgap);

// Wait for the conversion to be done.

ADC16_DRV_WaitConvDone(FSL_ADCONV1, 0);

// Fetch the conversion value.

adcValue = ADC16_DRV_GetConvValueSigned(FSL_ADCONV1, 0);

// Pause the conversion.

ADC16_DRV_PauseConv(FSL_ADCONV1, 0);

adcValue is either 0 or a single digit number less than 5, I configured the ADC to work with 12bits single mode.

Kindest Regards,

Carlos

Re: Use ADC Bandgap in KL27

lokuate — Wed, 17 Jun 2015 03:31:46 GMT

My project was generated using processor expert, I have spent 2 days trying to make the adc work... Please help.

Re: Use ADC Bandgap in KL27

kerryzhou — Thu, 18 Jun 2015 05:05:39 GMT

Hi Carlos,

I have a KL27 KSD project based on PE, it can printf the bandgap adc value, you can refer to it.

Please find the project from the attachment.

Wish it helps you!

If you still have question, please contact me!

Have a great day,
Jingjing

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