Writing ADC value to a microSD

Juan Pablo Jiménez

Other Parts Discussed in Thread: CC1352R

Hello!

I've been trying to write data into a file by modifying the FatSD example found in Simplelink Academy. The example works perfect when writing the preestablished Char array, but I can't seem to write the read value of the ADC. Is there any way to store directly the uint16_t into the microSD? Or a way to convert this value into a string or char array to store. I'm using the CC1352R Launchpad with the Sharp Memory LCD Boosterpack 128.

I'm a beginner, sorry if the question seems dumb.

over 4 years ago

0 Marie H over 4 years ago

TI__Guru* 83211 points

Hi,

Since I don't have the details of your software I don't know this is not working. Maybe it would work if you were using an intermediate variable stored somewhere else?

0 Keith Barkley over 4 years ago

Guru 42625 points

Use a shift command to save the two parts of your uint16:

uint16t dater;

char lower = dater & 0x00FF;

char upper = (dater >>8) & 0x00FF;

0 Juan Pablo Jiménez over 4 years ago in reply to Keith Barkley

Prodigy 40 points

After storing this way and trying to write the value, I still get a wierd sign instead of a number (see image below). Is the shift command correctly applied?

0 Juan Pablo Jiménez over 4 years ago in reply to Marie H

Prodigy 40 points

I´m using CCS 10.2.0 using the FatSD example. When I try saving data into the char array, that is afterwards saved in the file, I get a weird symbol instead of a number. Using an intermediate variable to change its type wont yield any results, actually it is now empty.

+1 Keith Barkley over 4 years ago in reply to Juan Pablo Jiménez

Guru 42625 points

What do you mean by a "number"?

Do you want an ascii representation? like "12345" or the values like 0x01, 0x02...

If you want an ascii string, you need to use sprintf().

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Writing ADC value to a microSD