About SRibo

SRibo · 2020-04-28

Hello,I'm working on a project involving the STM32L471 device clocked at 80Mhz (Externalcrystal oscillator with internal PLL).We are using ADC1, also clocked at 80Mhz (CKMODE = 0x01)We are noticing an issue concerning the calibration (and the consequ...

SRibo · 2019-05-20

Hello,I'm working on a BlueNRG2 device.I'm getting some trouble using the SPI in slave mode.If I configure the SPI with SPI_CPOL_Low and SPI_CPHA_2Edge configuration, I can receive from the master all bytes.If I configure the SPI with SPI_CPOL_Low an...

SRibo · 2020-04-29

Hi Mikhail,My issue is related to the ADC self calibration. No sampling time is configurable or involved during the self calibration process.At 80Mhz the calibration offset (CALFACT register, that contains the self calibration result) is not stable. ...

SRibo · 2020-04-29

I would like to add a new information:I tried to clock the ADC from PLLSAI1 clock.Also using this clock source at 80Mhz, calibration is unstable.Lowering down the ADC clock to 72Mhz, calibration become stable (always the same value, 59 dec).Regards.

SRibo · 2020-04-28

The VREFINT sampling time during the calibration process is automatically handled by the ADC. It's not configurable.Timings during the calibration process (for example for internal regulator stabilization) are respected in our firmware.I've also trie...

SRibo · 2019-06-05

Hi Winfred.Thankyou for your clarification.Best regards.Saverio.

SRibo · 2019-06-04

Hi Winfred,Thankyou, you are right, I didn't noted that line in the table.But is this a BlueNRG2 limitation? Because I worked in the past also on different kind of microcontrollers (microchip) but I don't remember this difference between first edge ...

User statistics

User Activity

STM32L471 ADC1 unstable calibration and accuracy at 80Mhz. Stable at 40Mhz.

BLUENRG2 SPI slave mode issue (getting only the first byte of a frame)

Re: STM32L471 ADC1 unstable calibration and accuracy at 80Mhz. Stable at 40Mhz.

Re: STM32L471 ADC1 unstable calibration and accuracy at 80Mhz. Stable at 40Mhz.

Re: STM32L471 ADC1 unstable calibration and accuracy at 80Mhz. Stable at 40Mhz.

Re: BLUENRG2 SPI slave mode issue (getting only the first byte of a frame)

Re: BLUENRG2 SPI slave mode issue (getting only the first byte of a frame)