About charles23

charles23 · 2021-08-29

I have been using the APP_LOG() macro from stm32_adv_trace.c to output messages while developing with the STM32WL55. This uses DMA transfers with the UART.I thought it would be useful to use the SWD debug port for console output, instead of the UART....

charles23 · 2021-06-17

STM32WL55 family devices need unique credentials on a chip-by-chip basis. These include DevEUI, AppKey and AppEUI, as well as Region etc.What strategies are there to permit this provisioning during the manufacturing process?I am thinking of this proc...

charles23 · 2021-05-04

When attempting to add an accelerometer to the LoRaWAN_End_Node program, on the SPI1 interface, I find that it works (in polled mode) until the board sleeps and is woken with an interrupt. Then the SPI1 Control Register 1 and Control Register 2 are c...

charles23 · 2021-04-17

I have used the Device Configuration Tool to set up an SPI1 peripheral on PB3, PB4, PB5 with manual control of the chip select, and polled (not interrupt driven). Writes to SPI slave chips registers execute without error, but register reads give a HA...

charles23 · 2021-03-20

I am building LoRaWan code using STM32CubeWL Firmware Package, which is set up for the STM32WL55. My own hardware uses the Seeed LoRa-E5 module, which uses the STM32WLE5. Code built for the STM32WL55 runs on the STM32WLE5, but I thought I should migr...

charles23 · 2021-08-13

OK, here is what I have done, but use at your own risk, and this is unsupported!First, the changes in PWR_EnterStopMode() and PWR_ExitStopMode():void PWR_EnterStopMode(void) { /* USER CODE BEGIN EnterStopMode_1 */ // Save and restore SPI register...

charles23 · 2021-07-26

A short update ( and thanks to @YBOUV.1). I have returned to this project to look at reducing power consumption.Previously I had set LOW_POWER_DISABLE to 1 to prevent entering STOP 2 mode and so preserve my SPI registers. I have now added code at the...

charles23 · 2021-05-05

I am using the code present in the LoRaWAN_End_Node example, which uses code in stm32_lpm_if.c (documented in AN4506 - inadequately, IMHO). Looking at the code it seems that ST make available three modes, intended to be increasingly severe:sleep mode...

charles23 · 2021-04-19

My mistake. When I moved some pins to GPIOB I failed to enable Port B clocks: __HAL_RCC_GPIOB_CLK_ENABLE();

charles23 · 2021-04-18

I have spent a bunch more time on this problem. I have tried all sorts of combinations of pins for SCK, MISO, MOSI, and both SPI1 and SPI2 peripherals. Consistently I see that if the SCK is on a Port A pin the RXNE flag behaves as expected, but if SC...

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Is there a version of the advanced trace utility that uses SWD instead of UART?

How to provision LoRa devices?

Why does power management corrupt SPI registers on STM32WLE5?

What causes SPI transmit to timeout on STM32WLE5 and how can I fix this?

How to migrate from STM32WL55 to STM32WLE5?

Re: Why does power management corrupt SPI registers on STM32WLE5?

Re: Why does power management corrupt SPI registers on STM32WLE5?

Re: Why does power management corrupt SPI registers on STM32WLE5?

Re: What causes SPI transmit to timeout on STM32WLE5 and how can I fix this?

Re: What causes SPI transmit to timeout on STM32WLE5 and how can I fix this?