Prepare MCU sepecific file
Each MCU has their own ARM compiler flags. Those are defined in a individual module for portability.
set(CPU_PARAMETERS ${CPU_PARAMETERS}
-mthumb
-mcpu=cortex-m4
-mfpu=fpv4-sp-d16
-mfloat-abi=hard
)
set(compiler_define ${compiler_define}
"USE_HAL_DRIVER"
"STM32L432xx"
)
To get ARM type from STM32CubeIDE:
General rule for settings would be as per table below:
| STM32 Family | -mcpu | -mfpu | -mfloat-abi |
|---|---|---|---|
| STM32F0 | cortex-m0 | Not used | soft |
| STM32F1 | cortex-m3 | Not used | soft |
| STM32F2 | cortex-m3 | Not used | soft |
| STM32F3 | cortex-m4 | fpv4-sp-d16 | hard |
| STM32F4 | cortex-m4 | fpv4-sp-d16 | hard |
| STM32F7 SP | cortex-m7 | fpv5-sp-d16 | hard |
| STM32F7 DP | cortex-m7 | fpv5-d16 | hard |
| STM32G0 | cortex-m0plus | Not used | soft |
| STM32C0 | cortex-m0plus | Not used | soft |
| STM32G4 | cortex-m4 | fpv4-sp-d16 | hard |
| STM32H7 | cortex-m7 | fpv5-d16 | hard |
| STM32L0 | cortex-m0plus | Not used | soft |
| STM32L1 | cortex-m3 | Not used | soft |
| STM32L4 | cortex-m4 | fpv4-sp-d16 | hard |
| STM32L5 | cortex-m33 | fpv5-sp-d16 | hard |
| STM32U5 | cortex-m33 | fpv5-sp-d16 | hard |
| STM32WB | cortex-m4 | fpv4-sp-d16 | hard |
| STM32WL CM4 | cortex-m4 | Not used | soft |
| STM32WL CM0 | cortex-m0plus | Not used | soft |