About c_shearer_cooper

c_shearer_cooper · 2024-05-03

I'm running a STM32G474RET6 on a Nucleo G474RE board, and trying to read the internal temperature.I set up ADC1 with 2 ranks (the temperature and the vrefint) like so (not including the error checking and comments for better readability): hadc1.Insta...

c_shearer_cooper · 2024-04-09

I'm creating some SPI slave code using an STM32 on a G474RE board. The protocol is that the master sends two command bytes, and then the slave sends back a single byte response. My SPI is a little rusty, but as I recall the way you do this is to ha...

c_shearer_cooper · 2024-04-09

I just need a breadboard that has two 38-pin connectors on it that plug into the CN7 and CN10. Does such a thing exist?Thanks,Chris

c_shearer_cooper · 2024-03-26

I need to chain two timers together to get one 48-bit timer that counts microseconds, I'm thinking of using TIM2 as the master and TIM3 as the slave. I have the feeling some of the answers are contained in this table in the Reference Manual but I can...

c_shearer_cooper · 2024-03-14

Sorry, my first time programming an STM32. I have a bunch of data I need to store for a few hours, and the thought was to store it in Flash since there's a lot more of it (512k vs. 128k for regular RAM) but it looks to be pretty daunting. I've been ...

c_shearer_cooper · 2024-05-10

Kholdoun -Thank you for your response, it took me a while to filter through it but the simple answer is:"__HAL_ADC_CALC_VREFANALOG_VOLTAGE does not return VREFINT, it returns VREF+"Chris

c_shearer_cooper · 2024-05-08

Any ideas?

c_shearer_cooper · 2024-04-10

For anyone looking at this post in the future - writing extra zeroes into pspi->Instance->DR doesn't work. The documentation for the STM32G4 says it's got "Two 32-bit embedded Rx and Tx FIFOs with DMA capability" (I think they should replace "two" wi...

c_shearer_cooper · 2024-04-10

Notice that your two diagrams present different answers to my question.In Figure 349, the slave has a "Tx shift register" and an "Rx shift register". In this scenario, once a byte has been written into the Rx shift register and sent out over MISO, t...

c_shearer_cooper · 2024-04-09

Unfortunately, in this case I have no control over the master, so whatever it's expecting, I have to deal with.So back to my original question, why is the STM32 sending "old" bytes even though I didn't tell it to?

User statistics

User Activity

Measuring temperature - voltage is off by factor of 2ish

SPI sends old bytes on MISO when no data available

Is there a daughterboard breadboard for a Nucleo G474RE?

Chaining two timers on the STM32G4

Writing data to STM32G4 Flash

Re: Measuring temperature - voltage is off by factor of 2ish

Re: Measuring temperature - voltage is off by factor of 2ish

Re: SPI sends old bytes on MISO when no data available

Re: SPI sends old bytes on MISO when no data available

Re: SPI sends old bytes on MISO when no data available