how to add header files in keil5 in ndk-52 example codes

[pavanvulichi]

hello, i am new to the Nordic controllers.I am having 2 doubts.

i want to modified saadc example code in keil 5 for that i want to add "app_timer.h" header file to the code. while copy the header file & respective .c file and paste it in the source file path i am facing issues . The issue is it doesn't support the .c file of that header file. so it does not support the functions in header file and reference of that function is in .c file. I am trying other method also i.e.,to add the header file by giving the path in the source group (i.e.,application) but the .h file is attached but it doesn't take its respective .c file.

I am working on adc in data sheet the adc in nrf 52 has 200kilo samples/sec.I understated the adc conversion its works well but i want to know speed of conversion. can any on tell me how the sampling speed is measure by using example saadc code and setting to get the maximum of 200 kilo samples per seconds.

can any one help to resolve the issue as early as possible.

[Jørgen Holmefjord]

Hi,

1. Please have a look at this answer, which should help you understand how to add source/header files to your project in Keil.
2. From the SAADC electrical specification, you can read the timing of the SAADC. The conversion time is <2 µs, and the smallest configurable acquisition time is 3 µs. This will give a total sample time of 5 µs, and give your the maximum sample rate of 200 ksps (1/5µs = 200 kHz). If you need higher acquisition time, the maximum sample rate will decrease.

Best regards,

Jørgen