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SDIO works well in SD-1bit mode but not in SD 4bit mode

I am using cubemx generated SD card test code on a custom board. And everything looks fine in SD 1bit mode, I can create new file, read and write data to it correctly. But when I am using 4bit mode, the f_open() function stalls. What might be the pro...

STM32H7 AXI bus clock stopped in CSleep?

According to RM0433 revision 5 section 7.5.12, “The AXI bridge clock is enabled when the CPU is in CRun mode.�? Does this mean that the AXI bridge clock is disabled (and presumably things connected to the AXI, like the MDMA) do not work in CSleep? Th...

CHead by Associate III
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Possible ways to save 40Kbytes/Second?

I would like to know what are the possible ways to save 40KBytes per second? what type of memory devices do i have to use. I presumed of using class 10 memory card but it has only 10Mbitspersecond (= 1250KBytes/second). I would have to store atleast...

Apill by Senior
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Disabling a timer after PeriodElapsedCallback is called

So I have two timers, one in OC mode and one in IC mode. The IC waits until the OC toggles, it registers the value and waits for it toggle again to record a second value. What I want to do is after the OC timer has toggled twice is for it to disable ...

FFuma by Associate II
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Resolved! HSI/2 before PLLSRC in STM32F030xC ?

Posted on January 26, 2018 at 18:50Hi,I have a problem with the PLLSRC of a STM32F030RC : to obtain 24MHz for the sysclk I have to use PLLMUL @ x6 with HSI (8MHz) but 6x8 = 48MHz ?If I output the sysclk on a MCO pin (with no div) I have actually 24M...

Peter M by Associate II
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How do I learn STM32?

HiI have learned AVR with C language . I have learned C++ language and a little C# .Now i want to learn stm32 . I have 2 questions .1.What should i do ?2.Should I read the reference manual first or the Hal driver?

gamer by Associate II
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