About jvavra

jvavra · 2023-02-02

Using CubeMX to create a new project on the STM32L0X0 series. I need two UARTS, which this part offers. However, in CubeMX, when I try to enable the SWD, it creates a conflict is the SYS tab for "System Wake-Up 3". When I roll over this, it says it c...

jvavra · 2022-08-24

I have multiple boards (self-designed) that I've been working with for years with no issue. However, suddenly I can't seem to do a Download/Debug (IAR compiler) using my ST-Link v2 (which I've literally used hundreds of times before). Tried a half do...

jvavra · 2022-06-13

I have a USB HID product based on the STM32F205. We've built thousands of them. However, recent builds have shown about a 5% failure rate where the device fails to enumerate (some of this 5% might fail 50% of the time when power cycling, some 90%+). ...

jvavra · 2022-04-11

I have a project based on the L496. The application does a few writes to FLASH. The initial write works correctly, however subsequent writes fail. The code is directly from STCube:/** * @brief Wait for a FLASH operation to complete. * @param Ti...

jvavra · 2022-03-07

jvavra · 2023-03-02

Good catch; the chart on page 25 of the User Manual sure seemed to suggest to me that PA3 corresponded to SB24. Either way, I just checked: I have good continuity across SB27, and no continuity between SB27 and SB26 or SB27 and SB28.

jvavra · 2023-03-02

I tried setting PA3 as an input (with pullup), waiting to see it go high, then enabling UART2. No change. Out of desperation, I also pulled C14. No change. I am officially stumped.

jvavra · 2023-02-28

I will try this, thank you so much. And no, I do not use the touch.

jvavra · 2023-02-28

My apologies: when I left an earlier job, I had to create a new ST account as I was not able to access my old work email. Looks like I inadventantly logged in with the old one. Same guy though!

jvavra · 2023-02-27

This is the contents of the GPIOA and UART2 registers when I am receiving all zeroes on UART2. I set a breakpoint in the HAL_UART_Receive_IT routine just before the function returns.

User statistics

User Activity

SWD Conflict w/ USART2 or System Wake-Up on STM32L0?

ST-Link Troubleshooting?

How to Test for Brownout?

Error Code Writing to FLASH On STM32L496

Can't Debug Using ST-Link

Re: Discovery L0538 UART2 RX Pin Stuck Low?

Re: Discovery L0538 UART2 RX Pin Stuck Low?

Re: Discovery L0538 UART2 RX Pin Stuck Low?

Re: Discovery L0538 UART2 RX Pin Stuck Low?

Re: Discovery L0538 UART2 RX Pin Stuck Low?