How to use the first argument of fopen for ADC with multiple inputs (e.g. for Kinetis K60)

[vladimirgainov]

From IO_User_Guide it's not clear how to construct the proper name of ADC input channel for fopen call using the template: “<device>:<channel_number>”

For example, there are numerous input port combinations in Kinetis K60 (taken from adc_mk60.h):

#define ADC3_SOURCE_ADPM3       (ADC_SOURCE_MODULE(4) | ADC_SOURCE_MUXSEL_X | ADC_SOURCE_CHANNEL(3) | ADC_SOURCE_DIFF)

#define ADC3_SOURCE_AD0         (ADC_SOURCE_MODULE(4) | ADC_SOURCE_MUXSEL_X | ADC_SOURCE_CHANNEL(0))

#define ADC3_SOURCE_AD1         (ADC_SOURCE_MODULE(4) | ADC_SOURCE_MUXSEL_X | ADC_SOURCE_CHANNEL(1))

#define ADC3_SOURCE_AD2         (ADC_SOURCE_MODULE(4) | ADC_SOURCE_MUXSEL_X | ADC_SOURCE_CHANNEL(2))

#define ADC3_SOURCE_AD3         (ADC_SOURCE_MODULE(4) | ADC_SOURCE_MUXSEL_X | ADC_SOURCE_CHANNEL(3))

#define ADC3_SOURCE_AD4A        (ADC_SOURCE_MODULE(4) | ADC_SOURCE_MUXSEL_A | ADC_SOURCE_CHANNEL(4))

#define ADC3_SOURCE_AD5A        (ADC_SOURCE_MODULE(4) | ADC_SOURCE_MUXSEL_A | ADC_SOURCE_CHANNEL(5))

#define ADC3_SOURCE_AD6A        (ADC_SOURCE_MODULE(4) | ADC_SOURCE_MUXSEL_A | ADC_SOURCE_CHANNEL(6))

#define ADC3_SOURCE_AD7A        (ADC_SOURCE_MODULE(4) | ADC_SOURCE_MUXSEL_A | ADC_SOURCE_CHANNEL(7))

#define ADC3_SOURCE_AD4B        (ADC_SOURCE_MODULE(4) | ADC_SOURCE_MUXSEL_B | ADC_SOURCE_CHANNEL(4))

#define ADC3_SOURCE_AD5B        (ADC_SOURCE_MODULE(4) | ADC_SOURCE_MUXSEL_B | ADC_SOURCE_CHANNEL(5))

#define ADC3_SOURCE_AD6B        (ADC_SOURCE_MODULE(4) | ADC_SOURCE_MUXSEL_B | ADC_SOURCE_CHANNEL(6))

#define ADC3_SOURCE_AD7B        (ADC_SOURCE_MODULE(4) | ADC_SOURCE_MUXSEL_B | ADC_SOURCE_CHANNEL(7))

#define ADC3_SOURCE_AD8         (ADC_SOURCE_MODULE(4) | ADC_SOURCE_MUXSEL_X | ADC_SOURCE_CHANNEL(8))

#define ADC3_SOURCE_AD9         (ADC_SOURCE_MODULE(4) | ADC_SOURCE_MUXSEL_X | ADC_SOURCE_CHANNEL(9))

Could anyone please provide an explicit example?

[DavidS]

Hi Vladimir,

Please have a look at the following MQX ADC example:

C:\Freescale\Freescale_MQX_4_1_1_GA\mqx\examples\lwadc

Regards,

David