About vbesson

vbesson · 2024-06-23

Hello, I have configured SPI Slave Receive only with Circular DMA, and I can receive data fine. My problem is that I want to have the current receive index on the SPI DMA Buffer when I receive an external interrupt I try to use StreamIndex but it sh...

vbesson · 2024-06-18

Hello, I am building a time critical application with SPI output communication using DMA circular bufferI need to output data at a very precise frequency that is a multiple of 0.125 ns. Normally it should be 4us but It would need to be sometime 3.9us...

vbesson · 2024-05-11

Dear Community,I am porting an old application made on AVR to STM32, and I am facing a strange timing issue. In a nutshell, the application is reading sector (512 Bytes) from a SDCARD and output the content of the buffer to GPIO with 4us cycle (meani...

vbesson · 2024-06-24

Hello Jan, ok for the downwards for receive, it is the same for the NDTR on send ?Thanks Vincent

vbesson · 2024-06-24

I tried to use &hspi3.hdmarx->Instance->NDTR; but it is not giving me right result. before the start of the receive transfer I cleaned the buffer with 0I only send FFI know that I received 152 bytes (last bytes before next 0).How do I get the recei...

vbesson · 2024-06-19

Thanks Jan, This is a bit what I thought, I will give it a tryVincent

vbesson · 2024-06-19

Please Have a look at this one this is working https://01001000.xyz/2020-08-09-Tutorial-STM32CubeIDE-SD-card/Regarding Baremetal SPI for SDCard on time critical I use this __attribute__((optimize("-Ofast"))) static bool SD_RxDataBlockFast(BYTE *buff...

vbesson · 2024-06-18

on a STM32F103, you can use FATFS and it is not taking some much of memory (RAM), I recommend to update chan fates to 0.15 to be able to manage long filename (instead of 0.11). As well if your application is time critical you should use your own SPI...

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SPI DMA Receive Index on external Interrupt

SPI Communication with Timer to clock the SPI

Clock cycle shift on GPIO output STM32F103

Re: SPI DMA Receive Index on external Interrupt

Re: SPI DMA Receive Index on external Interrupt

Re: SPI Communication with Timer to clock the SPI

Re: Without FATFS lib using for memory card read

Re: Without FATFS lib using for memory card read