Hello to everyone!
I converted my teensy 2.0++ (with voltage regulator) with teensyduino,i soldered it to the 3ds xl,I connected the teensy to the pc and powered on the 3ds using the battery. This is what I have with serial monitor:
Enabled outputs/inputs
Initialized SPI with 250khz frequency
Waiting the minimum 80 cycles for warm up
Keeping CS line on low for communication
Reset command sent on MOSI, but no answer from the slave. Please check your card connection/soldering
Initialization failed
Retrying...
Enabled outputs/inputs
Initialized SPI with 250khz frequency
Waiting the minimum 80 cycles for warm up
Keeping CS line on low for communication
Reset command sent on MOSI, but no answer from the slave. Please check your card connection/soldering
Initialization failed
Retrying...
Initialization failed after several retries
What should I do? I noticed that the GND is different in the arduino uno schematic,but the result is the same
Have you tested all your connections? However, I think the main problem is how you step down the voltage from 5v to 3.3v.