About MLam

MLam · 2023-09-19

Hello everyone,I'm working on a project where i use 2 STM32 MCU which communicate with each other with LPUART and DMA.My STM32 references : STM32L072CBT6 and STM32L010C6T6I have a problem with this communication with LPUART and DMA. I see that error ...

MLam · 2023-09-14

Hello everyone,I'm working on a project with a STM32L072CBT6.I'm using LPUART (PB10 / PB11) at 9600 bauds to communicate with an other board. For low power consumption, i'm using LSE for my LPUART.When i check my bauds rate on my oscilloscope, i get ...

MLam · 2023-02-15

Hello everyone,I'm working on a project with an STM32L072CBT6.In my project, i use a LPUART1 and USART1 to send and receive data. Connected to this i use a DMA to get data.My projet works fine so i try to implement stop mode to reduce consumption.In ...

MLam · 2023-01-06

Hi everyone,I'm working on a project with an STM32L072C6T6.I'm using LPUART1 DMA to get data from my LPUART with interrupt when the bus go idle.My soft working when, after power on the device, i push the reset button of the MCU. All start correctly.B...

MLam · 2023-01-04

Hello everyone,I have made a custom board with STM32L072CBT6. All works fine when i use my board and program her with STLink.I would try to program my board through USB, to do that i have a uUSB connector on my board connected to my uC. To flash, i u...

MLam · 2023-09-20

Hello,I'm using DMA channel 5 for USART1_RX and DMA channel 3 for LPUART1_RX on my STM32L072CBT6.I made others tests and i see that false data are receive on my LPUART1 buffer sometime. This false data are not due to bad communication because data t...

MLam · 2023-09-19

To conclude,I have reduce my baud rate to 1200 to get a better match.In a same time i see that my DMA+LPUART often crash when i try to get my data at initialization.So i have added a delay for my LPUART Interrupt when i power on my system.

MLam · 2023-09-15

OK but when i get frequency on my MCO GPIO that seems that my crystal start correctly no ?Yes i have read what Jan wrote, i'm currently trying to modify UCESM bit.

MLam · 2023-09-15

Hello AScha.3,This my return after your reply:1) Frequency is correct, Picture below get from MCO output 2) I have try in High LSE drive capability but nothing change.3) Resultat for various bauds :9600 bauds configured10718 bauds mesured4800 bauds c...

MLam · 2023-02-21

Hello,Thanks for you return,I found a solution to solve my problem when my device boot,if (HAL_UART_GetState(&hlpuart1) == 32) // on power-on LPUART/DMA meet problem to start interrupt maybe due of power-on of the module connected so we need to reini...

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