ChibiOS Free Embedded RTOS

The patch Giovanni proposed certainly improved SDIO writes, I am running at SDC_CLK_50MHz again.

I'll let the system run for a while and feedback if I encounter any issues.

Thank you!

Thank you Giovanni,

I'll check this later this week.

Hi Giovanni

sdc_detect_bus_clk() was reporting that it did but I will try some other cards.

But why are reads so different from writes?

This seems to be related to the speed of the data clock.

If I override the switch to SDC_CLK_50MHz in sdcConnect() then writes to the card are working.

But what could be different between reads and writes at the higher clock rate

Here they are Giovanni.

Thank you for your help.

It always fails for writes

I took your ChibiOS 3 demo RT-STM32F407-DISCOVERY and modified board.h to allow SD3, Ethernet and SD Card on the STM32F4DISCOVERY Base Board.

I have lwIP and FatFs in the build and the makefile has -O0 for debug.

SD Card is a SanDisk Ultra. Reads have always worked 100% but when I came to use ...

Hi Giovanni,

I changed to:-



And it hangs there. Reads are fine, writes always fail.

Did you get anywhere with this?

I cant write to a card as the driver fails in sdc_lld_wait_transaction_end() because of:-

if ((SDIO->STA & SDIO_STA_DATAEND) == 0) {
osalSysUnlock();
return HAL_FAILED;

I'm using a STM32F407 DISCO with the STM32F4DISCOVERY Base Board. The tried the testhal ...

Thank you Giovanni for all your work