Hi, with a LPC54600 Xpresso board, I met a problem that the read performance of USB MSC example is very low.
IAR 8.11.2, compiled in high speed
SD Card : Sandisk 16G Class 10
Project : usb_examples\usb_device_msc_sdcard
#define USB_DEVICE_CONFIG_LPCIP3511HS (1U)
At first I got only 1.2MB/s read and 350KB/s write, so I changed the MSC packet size:
#define USB_DEVICE_MSC_WRITE_BUFF_SIZE (16384U)
#define USB_DEVICE_MSC_READ_BUFF_SIZE (16384U)
Now the write speed is increased to 3.5MB/s, but the read speed is decreased to 800KB/s !
On STM32F746 this SD card has a read speed of 7MB/s with their awful SDIO implementation.
Has anyone met this problem ?