About Erlkoenig

Erlkoenig · 2024-12-16

It is well-known that when configuring and starting a timer using HAL_TIM_Base_Init and HAL_TIM_Base_Start_IT, the interrupt and callback are triggered immediately. This is because configuring the reload-register & prescaler requires generating an up...

Erlkoenig · 2024-11-26

Hi,in my low-power STM32WL55 application I would like to use the LPUART to receive data (no transmission) while the device is in STOP2 mode. I have two questions about this:The reference manual states:"Before entering low-power mode, make sure that n...

Erlkoenig · 2024-05-12

Hi,STM32CubeMonitor-UCPD sometimes displays RDOs like this:Where does the number MaximumOperatingCurrent come form? Since the RDO is defined as: typedef struct { uint32_t MaxOperatingCurrent10mAunits : /*!< Corresponding to min if GiveBackFlag = 1 */...

Erlkoenig · 2024-04-30

Hi,I'm having trouble understanding the radio IRQs on STM32WL55. According to the reference manual NVIC section, there is one interrupt line for two interrupt sources (which are ORed together) for the radio:The 3 IRQs from the Semtech module ORed tog...

Erlkoenig · 2024-04-24

On the STM32WL55, when using LoRa and non-continuous receive mode, the RX timeout triggers immediately, i.e. the value passed to Radio.Rx is ignored. This can be demonstrated using the SubGHz_Phy example on the NUCLEO-WL55JC and setting#define USE_MO...

Erlkoenig · 2024-12-19

Hi @STTwo-32 ,thank you very much. "modify the clock after waking up to SysCLK" - will this also work when SysCLK is not 16 MHz? I guess I have to change LPUART_PRESC while switching the LPUART input clock, but how do I do this atomically, without in...

Erlkoenig · 2024-07-05

Hi Zeepunt, unfortunately I don't know of a "real" solution (except using TX mode right before entering RX mode). The workaround is to use continuous mode, or set symbTimeout = 0.

Erlkoenig · 2024-06-12

For other readers and future reference:I asked the support directly, and confirmed that the given formula from the datasheet "BW[DSB] > BR + 2 x Fdev + frequency error" is indeed correct and should be used for implementing RF applications. It also al...

Erlkoenig · 2024-05-31

@STTwo-32 wrote:you have to do this manually if you want (Just a programming choice).So this means I can choose between:Use continuous mode, where symbTimeout is forced to 0Use non-continuous mode with symbTimeout != 0 which does not work as timeout ...

Erlkoenig · 2024-05-29

Hi @STTwo-32 ,I would like to understand the settings of the SubGHz peripheral so I can configure it optimally for my application.I think the "FSK_BANDWIDTH" setting in the example is wrong (too small according to the formula from the datasheet), but...

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User Activity

Bug in TIM_Base_SetConfig, fix TIM_Base_SetConfig to block first interrupt

STM32WL55 Using LPUART in STOP2 mode with wake-up & clock-switching (HSI-MSI)

Bug in STM32CubeMonitor-UCPD log - RDO decoding

STM32WL55 SUBGHZ Interrupt enable/disable and race conditions in SubGHz_Phy/HAL

LoRa RX timeout triggers immediately in non-continuous receive mode

Re: STM32WL55 Using LPUART in STOP2 mode with wake-up & clock-switching (HSI-MSI)

Re: LoRa RX timeout triggers immediately in non-continuous receive mode

Re: STM32WL55 FSK receive bandwith setting, SubGHz_Phy_Per example

Re: LoRa RX timeout triggers immediately in non-continuous receive mode

Re: STM32WL55 FSK receive bandwith setting, SubGHz_Phy_Per example