RE: USBD_MSC example and porting custom FW to PCA10056 issue

Tosa — Tue, 02 Aug 2022 21:24:30 GMT

Hi Einar, I forgot to change QSPI_CONFIG_ADDRMODE in sdk_config.h to 24bit. Anyhow, thanks for your reply!

RE: USBD_MSC example and porting custom FW to PCA10056 issue

Einar Thorsrud — Mon, 01 Aug 2022 14:22:29 GMT

Hi,

The 8 MB drive is the external flash. The 190 kB RAM drive should also be formattable from Windows, and is so when I test. However, the empty drive (search for m_block_dev_empty in the main.c of the example) cannot be formatted, and it is not really meaningful. The RAM disk is also of limited value, so unless it is relevant for you I would strip away m_block_dev_ram and related code from the example also, so that you are left with the drive that is on the external QSPI flash.

Regarding FR_NO_FILESYSTEM that indicates no FAT filesystem, and you write you get an error when formatting, but I cannot see from here what the issue was. As I understand you got the 8 MB drive (which is the only flash drive) in the sample working, so it could be interesting to compare your code with the example? And perhaps also your changes to port your app to the DK against the code that is working your your custom board?