I'm trying to use SAM38EAU to build new motherboard hardware and LABVIEW to build new control side.So far so good, but there are two problems with SD write and read operations.
1. I cannot read the SD card as a disk on the computer through the usb port and display the RAW attribute
2. I also cannot write the.gco file to the SD card through the M28 command, which prompts "No Checksum with line number, Last line: 0".
3. The reply to M23 is
"Echo: Now fresh file: FANG4. The GOC
The open failed, File: FANG4. GOC."
In addition, I set the native USB interface of SAM38EAU to slave mode. I can successfully identify SD card through M21 and read the list of files through M20.