About Matt__

Matt__ · 2024-05-02

Hello, I am working on trying to get the SDMMC1 on the stm32h745 to function properly. Currently I have this for my current initialization of the SDMMC and it does not return any errors. hsd1.Instance = SDMMC1;hsd1.Init.ClockEdge = SDMMC_CLOCK_EDGE_R...

Matt__ · 2024-04-16

Hello, I am trying to better understand the relation of how the SYSCFG_EXTICRx and the EXTI_RTSR1 registers correspond. In the manual as I understand, the SYSCFG_EXTICRx registers are used to setup a pin on the EXTI line for interrupt use by setti...

Matt__ · 2024-05-09

Actually the series resistor is 22ohm, sorry i misread when looking.

Matt__ · 2024-05-09

I have tried using medium to very high and not found a difference in the speed I increase the clock. The series resistors are 220 ohms and the pull up resistors are 47.5k.

Matt__ · 2024-05-09

So the lines are only 45mm long, they are not shorted. There is a series resistor on all lines to help clean up the signal and pull up resistors to 3.3v on all lines except clk. I have an oscilloscope on the lines and the signals look clean coming ac...

Matt__ · 2024-05-09

So I was able to get the f_mount to succeed but only at low speeds. Currently I cannot figure out how to get past 6Mhz at 4 bits bandwidth and have the f_mount succeed. I have tried adjusting the clocks in the cubemx but can't seem to get any faster....

Matt__ · 2024-05-02

Yes I am using a sd card and will eventually implement fatfs, but was trying to get the SDMMC to work first. I am currently having no luck in getting the system to get any data running in 1 bit mode.

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STM32H745 SDMMC block reads returning empty

STM32H745 EXTI and SYSCFG_EXTICRx relation

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Re: STM32H745 SDMMC block reads returning empty