SparkFun Forums 

Where electronics enthusiasts find answers.

What are we doing right with Artemis? What are we doing wrong? Let us know here!
User avatar
By JPSCHOLET
#233151
Hello
My project is : recording audio (mono 16 bits 44kHz) on a SD card.
RedBoard-Artemis-Nano
IDE = Arduino
Two problems:
1/ using SD.h and SPI.h, I cannot reach a sufficient rate of recording (40kb/s instead of 88, for a theoritical minimum of 25Mb/s for a standard SD card !) The speed is limited by SD Write (32768 bytes buffers).
SPI configuration : what is the maximum SPI clock freq usable with a 32Go SDHC ?; changing this parameter seems having no effect (superseded by SD library ?)
2/ when I add PDM library to get data from the integrated mic, recording on SD stops after some seconds > conflict between SD, SPI and PDM ?
Thanks in advance for your help.
Jean-Pierre
 Topic permissions

You can post new topics in this forum
You can reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

long long title how many chars? lets see 123 ok more? yes 60

We have created lots of YouTube videos just so you can achieve [...]

Another post test yes yes yes or no, maybe ni? :-/

The best flat phpBB theme around. Period. Fine craftmanship and [...]

Do you need a super MOD? Well here it is. chew on this

All you need is right here. Content tag, SEO, listing, Pizza and spaghetti [...]

Lasagna on me this time ok? I got plenty of cash

this should be fantastic. but what about links,images, bbcodes etc etc? [...]