About DSudo.2

DSudo.2 · 2024-09-24

I'm working on a board that has a string of 6 SPI quad FET chips whose outputs I'm trying to PWM in software. The string of FET drivers have a latch signal to transfer the shifted data to the outputs. Because the DMA uses the SPI peripheral's FIFO, I...

DSudo.2 · 2024-08-19

I'm trying to use circular DMA with a SPI bus peripheral, where the DMA transfer complete interrupt causes something to happen after each block of data is DMA'd to the SPI bus. If my DMA transfer size is greater than 5, everything works well accordin...

DSudo.2 · 2024-08-16

I use the dark theme of the IDE and can find no preference settings to change the colors for the build analyzer output. The IDE shows the usage info with light gray text on a bright green background which (to my eyes) is almost unreadable. I say almo...

DSudo.2 · 2023-09-20

Is there a way to read an environment variable from the PC (I'm running on a Windows box) and pass that value somehow (maybe via a temporarily created define for the command line) such that a file being compiled can use the value of that environment ...

DSudo.2 · 2023-06-01

The USART section states that all 4 USARTs can be clocked from a common set of 4 clock sources, but doesn't reference how to specify the clock for USART4 either.

DSudo.2 · 2024-10-04

Thanks for the suggestion. In hindsight, this was probably what I should've tried in the first place. :face_with_rolling_eyes:

DSudo.2 · 2024-09-25

Thanks for the suggestion. My task involves hardware that's already in production, so I can't wire the SPI clock to a capture/compare input. I'm trying to use circular DMA with a circular table of 3-byte values, where the table index gets incremented...

DSudo.2 · 2024-09-25

EXTI->PR |= BIT(15); // clear EXTI15 interruptOk... that was easy. Getting close to the final solution. One last step is moving the call to DMA the next set of data from where it currently is to right after where the SPI FET latch signal is generate...

DSudo.2 · 2024-09-24

My bad... the interrupt on negation of SPI NSS is being vectored to. I had forgotten that I had tried setting the SPI NSS mode from PULSE_ENABLE to PULSE_DISABLE, hoping that it would change the behavior to keeping NSS asserted while the FIFO was bei...

DSudo.2 · 2024-09-24

// configure EXTI15 to generate an interrupt (EXTI4_15_IRQHandler) when PA15 has a rising edge EXTI->RTSR |= BIT(15); EXTI->FTSR &= ~BIT(15); EXTI->EMR |= BIT(15); EXTI->IMR |= BIT(15); SYSCFG->EXTICR[4] &= ~(0xF << 12); NVIC_EnableIRQ(...

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Is it possible to trigger a SPI transfer complete interrupt using circular DMA with 3 byte buffer on STM32F072

STM32F072 circular DMA with SPI bus transfers less than 6 bytes and DMA transfer complete interrupt problem

How can I change the build analyzer color preferences?

Read environment variable during build and pass value to file to be compiled

STM32F072 Clock tree section shows how to select clock for USARTS 1-3, but not USART4. Were in the reference manual (RM0091 Rev 10) does it show how to select the clock source for USART4?

Re: Is it possible to trigger a SPI transfer complete interrupt using circular DMA with 3 byte buffer on STM32F072

Re: Is it possible to trigger a SPI transfer complete interrupt using circular DMA with 3 byte buffer on STM32F072

Re: Is it possible to trigger a SPI transfer complete interrupt using circular DMA with 3 byte buffer on STM32F072

Re: Is it possible to trigger a SPI transfer complete interrupt using circular DMA with 3 byte buffer on STM32F072

Re: Is it possible to trigger a SPI transfer complete interrupt using circular DMA with 3 byte buffer on STM32F072