Thank you for any attention to this post. I am attempting to record an encoder in a list. I have written a program that prints the data to the screen and then prints the list. The two sets of numbers are different. I was hoping someone could point out what I was doing wrong.
The screen then prints this:
two different lists, since I am a new user I cannot upload a second image. I will try to upload it as the first comment. Also, I am trying to figure out how to embed code.
Thanks again.
This is what the list looks like.
myTestData is an array of uint8_t, so values will be limited to the range 0 to 255. Make it int32_t.
I am in awe.
Thank you.
When I try to Brain.SDcard.savefile then it throws an error that myTestData is not a uint8_t , is there a way around this?
btw, I am sure it is obvious, but the base of this program was from jpearman.
cast the array to uint8_t *.
Brain.SDcard.savefile("test.txt", reinterpret_cast<uint8_t *>(testData), lengthToSave );
yea, we should have probably have made that function take a void *.
remember that the length you pass is in bytes, so if you need to save 100 uint32_t values, it would be 400.
Thanks again.
I also found one of your previous posts. I ended up using some of that code and this also accomplished my goal.
I will try and understand your solution, it appears more advanced. Happy Holidays.
This is the whole code:
Edited program to make it more condense.
And in the next post the resultant file
(uint8_t *)buffer
is the C version of
reinterpret_cast<uint8_t *>(buffer)
which is the C++ equivalent
strlen isn’t going to work properly with an array of binary data, it will look for first occurrence of a byte with a value of 0. If you want to save the whole array, use sizeof(myTestData)
(ok, I see you switched to saving a text string, so strlen will work ok)