About LM.2

LM.2 · 2022-09-29

Hey I am using a STM32L486Z6Tx as an SPI slave, the device transfers blocks of 3588 bytes (512*7 + 4 byte checksum). At spi clock rates up to 1.2MHz everything works as planned. However at higher clockrates I still receive all my data, the checksum p...

LM.2 · 2022-03-24

Hey,I have been using the x-cube-nfc3 demo for Nucleo-l496ZG 144 pin board along with a CR95HF. In SPI mode I can successfully initialise and read the ID from NFC tags. I attempted to change to UART mode by adding #define ST25R95_INTERFACE_UART 1to p...

LM.2 · 2022-03-21

I have a STM32L476 operating in spi slave mode and an embedded linux master. It is meant to offload the contents of a file stored on an SD card. I do this in 2052 byte bursts (2048 data + 4 byte checksum). The very first transfer I send duplicates th...

LM.2 · 2021-11-19

Hey,I have been working on a data logger project that requires sensors to be read at 10Hz, the data timestamped and stored to an SD card. I am using FreeRTOS and a Streambuffer is used to pass data from the measurement task to the storage task. The s...

LM.2 · 2022-03-28

I'm still looking for a reason as to why this is happening.Interestingly I noticed that it only happens on the 1st transfer after a reboot. I had to reset and reinitiaise the peripheral after each transmission as the BSY flag was not resetting (this ...

LM.2 · 2022-03-25

Thank you BrianI didn't realise that it was swapping from polling to interrupt mode. Adding the interrupt callbacks fixed all of my issues.

LM.2 · 2022-03-22

I'm currently ignoring anything sent by the master on the data line, the only thing that matters is the clock. Currently 10MHz but I experience the same issue when lowered to 1MHz

LM.2 · 2021-11-19

I'm using a Streambuffer which is large enough to store seconds worth of data. A write event is triggered whenever there are at least 1024 bytes of data in this buffer. Then only 1024 bytes are extracted from the buffer and sent to the SD card (I rea...

LM.2 · 2021-11-19

Update. I had forgotten to add portYIELD_FROM_ISR to the timer interrupt triggering my measurement task. Now timing isn't interrupted however the SD write freezes for multiple seconds (possibly forever) and my buffer overflows. Are SD cards just not...

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STM32L486Z6Tx as an SPI slave with DMA

x-cube-nfc3 UART issues, passing initialisation but not detecting NFC tags.

STM32L476 SPI slave mode with DMA repeated first character

SDIO + FATFS + DMA + FreeRTOS advice, currently inconsistent write times + stalling other tasks

Re: STM32L476 SPI slave mode with DMA repeated first character

Re: x-cube-nfc3 UART issues, passing initialisation but not detecting NFC tags.

Re: STM32L476 SPI slave mode with DMA repeated first character

Re: SDIO + FATFS + DMA + FreeRTOS advice, currently inconsistent write times + stalling other tasks

Re: SDIO + FATFS + DMA + FreeRTOS advice, currently inconsistent write times + stalling other tasks