About E-John

E-John · 2024-02-08

Hi all, What is the correct flow to use HAL_UART_Receive_IT() to receive uart data?The first package is lost first its first char,Here is the flow used now, From the gif, you can see "H" is missing for 1st package, and all normal for others.The probl...

E-John · 2024-01-31

Dear Sir, I have a NUCLEO-STM32G0B1RE board. I configure USART2 with CTS and RTS try to communicate with u-blox GSM module LARA-6004D, but fails. No data received.Is there any missing? Any comment are welcome, thanks.hardware connection isMCU TXD <->...

E-John · 2024-01-27

Dear SIR,I am trying to STM32G0B1 USART3 DMA receiving data from PC and do processing on MCU.I add code in callback function HAL_UARTEx_RxEventCallback()these code are try to get the whole package ending with '\r' and set a flag to notice the FreeRTO...

E-John · 2024-01-01

Dear SIR,What is the max number of external inputs using interrupt at the same time?In my application, it uses 22 GPIO as external input as Fig.1.1. I use STM32CubeMx to set "PB1" to "GPIO_EXT1" then set "PC1" to "GPIO_EXT1", after setting "PC1", the...

E-John · 2023-12-14

Dear SIR, We want to use STM32G0B0 to develop our project. We want to use EVK to write code before our board comes.But there is NO STM32G0B0 EVK, only STM32G0B1 EVK exist.(or NUCLEO-G0B1RE, https://www.st.com/en/evaluation-tools/nucleo-g0b1re.html)Ho...

E-John · 2024-02-15

I've had that same problem.My solution is to declare the transmitted buffer as "global" or "static" type.

E-John · 2024-02-08

Dear Karl, 1. HAL_UART_Receive_IT should only be called from the callback and not in your PCUartTask. ---> It is needed to call HAL_UART_Receive_IT() outside the callback once. Because there is a state machine controlled by HAL_UART_xxx API, ...

E-John · 2024-02-08

Hi TDK,Thanks for your guide, I have modified the code as you mentioned, it works. Use a global variable to store the received byte. You're using a local variable which goes out of scope immediately. This will lead to stack corruption. ---> m...

E-John · 2024-02-07

Hi Andrew,After test, the conclusion is below,For GSM module LARA-6004D which voltage is 1.8V1. It needs a level-shift circuit between the STM32 and the GSM module.2. The 4-wire connection should be as below described, cross-over connection is not ne...

E-John · 2024-02-01

Hi Andrew, Most likely the level-shift problem, I measured MCU UART voltage is 3.3V, while GSM module UART level is 1.8V

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How to use HAL_UART_Receive_IT to receive uart data?

NUCLEO-STM32G0B1RE USART2 with CTS/RTS can NOT communicate with U-blox GSM module LARA-6004D?

STM32G0B1 USART3 DMA receiving whole data and set it to application layer for process on FreeRTOS?

The max number of external inputs using interrupt at the same time?

Mrgrate STM32G0B1 to STM32G0B0?

Re: Problem with "HAL_UART_Transmit_IT" function

Re: How to use HAL_UART_Receive_IT to receive uart data?

Re: How to use HAL_UART_Receive_IT to receive uart data?

Re: NUCLEO-STM32G0B1RE USART2 with CTS/RTS can NOT communicate with U-blox GSM module LARA-6004D?

Re: NUCLEO-STM32G0B1RE USART2 with CTS/RTS can NOT communicate with U-blox GSM module LARA-6004D?