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greiman / UsbFat

Arduino FAT32/FAT16 library for USB drives.
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key.begin fails #3

Closed AMORel69 closed 8 years ago

AMORel69 commented 8 years ago

Hello, First, thanks for so great work! But I can't use the library. Whatever the example code I run, key.begin() fails . And I couldn't find any suggestion in the documentation... Have you already met/heart that issue ? Have you any idea of what's going wrong / what I can do to figure it out. Thanks for hep! Antoine

greiman commented 8 years ago

I just checked the examples and they work on my hardware.

Here is the bench on a Mega ADK

Use a freshly formatted volume for best performance.

Type any character to start Free RAM: 6891 Type is FAT32 Volume size: 7.85 GB (GB = 1E9 bytes) File size 5 MB Buffer size 100 bytes Starting write test, please wait.

write speed and latency speed,max,min,avg KB/Sec,usec,usec,usec 109.04,383216,88,911

Starting read test, please wait.

read speed and latency speed,max,min,avg KB/Sec,usec,usec,usec 157.91,5620,84,627

Here is the UsbDriveInfo example on an Uno with a Circuits@Home USB shield.

UsbFat version: 20141220 FreeRam 981 Type any character to begin USB initialized. Volume initialized.

Volume Size: 7845.25 MB (MB = 1,000,000 bytes) Volume is FAT32 blocksPerCluster: 32 clusterCount: 478836 fatStartBlock: 70 fatCount: 2 blocksPerFat: 3741 rootDirStart: 2 dataStartBlock: 7552 Determining free cluster count - please wait. freeClusters: 448983 freeSpace: 7356.14 MB (MB = 1,000,000 bytes)

Done

I can't help you more since I don't debug user hardware.

ThomasHenryLyly commented 5 years ago

Hello Greiman, I use Your UsbFat lib and I use usb host shield (https://www.cytron.io/p-shield-usb) and i use your exmple (UsbDriveInfo). and then it says Error: key.begin failed. I use Arduino uno. How do i fix it ??? Thank you

greiman commented 5 years ago

Can't help you since I don't have this shield.

I will not be updating this library since there are not many users.

ThomasHenryLyly commented 5 years ago

hi, I just change my board. I use Arduino ADK and use USBFat lib. But, when I plug my usb and other USBs, Serial Monitor said that: Error: initUSB failed. Please, help me

ThomasHenryLyly commented 5 years ago

i have a question , when i use your USBFat lib, what is "Key" ??

Người gửi: Nguyễn Minh Tuấn Email: bollbat5566@gmail.com SĐT: 0916010298

Vào Th 6, 18 thg 1, 2019 vào lúc 20:41 Bill Greiman < notifications@github.com> đã viết:

Can't help you since I don't have this shield.

I will not be updating this library since there are not many users.

— You are receiving this because you commented. Reply to this email directly, view it on GitHub https://github.com/greiman/UsbFat/issues/3#issuecomment-455549663, or mute the thread https://github.com/notifications/unsubscribe-auth/AsotpHdu-2_TkIwn-gPCVoYT4DLRBw4Jks5vEc8AgaJpZM4I6G97 .

greiman commented 5 years ago

UsbFat supports USB flash drives formatted FAT32.

I tested an ADK with a 4 GB USB key. I used Arduino IDE 1.8.8

Here are results from the UsbDriveInfo example.

UsbFat version: 20141220 FreeRam 7129 Type any character to begin USB initialized. Volume initialized.

Volume Size: 4002.53 MB (MB = 1,000,000 bytes) Volume is FAT32 blocksPerCluster: 32 clusterCount: 244295 fatStartBlock: 54 fatCount: 2 blocksPerFat: 1909 rootDirStart: 2 dataStartBlock: 3872 Determining free cluster count - please wait. freeClusters: 244026 freeSpace: 3998.12 MB (MB = 1,000,000 bytes)

Done

I can't help you debug your setup and am no longer maintaining UsbFat. There will be no future releases.