Incorrect DMA Interrupt Handler Generated for STM32C091xx (LL-Driver)

[Kadir]

Environment Details

• Microcontroller: STM32C091CBTx (LQFP48)
• STM32CubeMX Version: 6.14.1
• LL-Driver

1. Configuration: An STM32CubeMX project is configured for an STM32C091CBTx MCU, with DMA channel 6 assigned to a peripheral (ADC).
2. Generated Code (stm32c0xx_it.c): Upon code generation, CubeMX creates the shared interrupt handler for DMA channels 4, 5, 6, and 7 in the stm32c0xx_it.c file. The function is defined as:

   void DMAMUX1_DMA1_CH4_5_6_7_IRQHandler(void)

3. Startup File Vector Table (startup_stm32c091xx.s): However, the default startup file provided with the project contains an incorrect entry for this interrupt vector. The handler name in the vector table is listed as:

   DMAMUX_DMA1CH4_5_IRQHandler

Consequently, the `DMAMUX1_DMA1_CH4_5_6_7_IRQHandler` function is never invoked when an attempt is made to trigger DMA Channel 6.

Confirmed Workaround

The issue can be resolved by manually editing the startup file:

1. In the `startup_stm32c091xx.s` file,
2. Search for the incorrect vector name: `DMAMUX_DMA1CH4_5_IRQHandler`.
3. Rename it to `DMAMUX1_DMA1_CH4_5_6_7_IRQHandler`.

Following this modification, the DMA interrupt for channel 6 is successfully triggered and handled by the ISR.

[Ghofrane GSOURI]

Hello @Kadir 

I'm currently investigating this issue.

I will get back to you asap

THX

Ghofrane

[Ghofrane GSOURI]

Hello @Kadir 

Your contribution is greatly appreciated.

The issue has been escalated to the development team for resolution. The internal ticket number is 214319  .

I will keep you posted with updates.

THX

Ghofrane