About cgallardo

cgallardo · 2024-02-27

Hello,I have a custom board with a STM32L010C6 MCU, which periodically reads 3 bytes (24 bit array) from an external component through SPI.I only need SCLK and MISO since the frame resets using a timeout.I configured the SPI as Only-Receiving Master,...

cgallardo · 2024-02-09

Hello,I am working on a sensor device acting as a SPI slave with transmit only and without chip select signal. I am using a STM32G070 microcontroller.I configured 4 bytes transmissions using DMA. The problem I have is that the external master can per...

cgallardo · 2024-02-28

>>You don't say in what way the data is wrong. Is is garbled bits, missing bytes, repeated bytes?In wrong reads, the bytes are shuffled.>>Ok, so how does that maintain synchronization?The synchronization is kept by using a minimum delay between sampl...

cgallardo · 2024-02-13

It is solved!What I was doing wrong was the reset sequence.On the 5th step, the functions sequence that works for a good reset is:HAL_SPI_DMAStop();__HAL_RCC_SPIx_FORCE_RESET();__HAL_RCC_SPIx_RELEASE_RESET();HAL_SPI_Init();HAL_SPI_Transmit_DMA(); Onc...

cgallardo · 2024-02-13

Thank you for your answer.I tried performing a reinitialization of the SPI peripheral and the DMA stream but it doesn't work.What I am trying to do is the implementation of SSI communication. I did it by bit-banging but it is not fast enough for high...

cgallardo · 2024-02-09

I changed the 5th step to stop DMA and start transmisison again (HAL_DMAStop(), HAL_SPI_Transmit_DMA()) and now it is still shifted after incomplete reads but it seems to restart after completing the remaining bits of the incomplete byte.Before the c...

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