search

greiman / SdFat

Arduino FAT16/FAT32 exFAT Library
MIT License
1.07k stars 503 forks source link

Problem with Mega + W5500 but OK with W5100 #274

Open soyferny opened 3 years ago

soyferny commented 3 years ago

Hi

I've an Arduino that download a XML file from an IP address and store on SD Card When I was using sdFat V1.1.4 there was no problems. After update to V 2.0.5 Arduino start to download the file but suddenly crash and only the fisrt 20 lines are downloaded and stored on SD. From this point Ethernet conection doesn't work anymore. With the same Arduino if i replace the Original Ethernet Shield v2 (W5500) for a clone Ethernet shield W5100 all works fine. With sdFat 2.0.5 I've tested SPI_HALF_SPEED, 4MHz, 2MHz, 1Mhz... but always the same result, the same lines are downloaded. Any help??

Sorry for my bad english :(

greiman commented 3 years ago

I have no idea what is happening. The fact that your program works with the W5100 shield but not the W5500 means the problem is not easy to diagnose.

Sorry I can't be of more help.

soyferny commented 3 years ago

Hi again

I've dissabled all DEBUG_PRINT and now works without problems... Is sdFat library 2.0.5 (or Ethernet library) using Timer5, i use PWM output PINS 44, 45 and 46???

greiman commented 3 years ago

SdFat uses no timers or interrupts. It only uses The SPI pins, SD chip-select, MISO, MOSI, and SCK.

soyferny commented 3 years ago

I found a rally good solution, initialize Serial at 115200 bps I don't know why, but there is a problem between Mega 2560, W5500 and Serial at 9600 bps, same code with W5100 works but not with W5500. Now (at 115200 bps) working with both shields.

Hope this solution can help to anyone with same problem

Really thanks for your support and your library