kywwilson11 opened a new pull request, #16706:
URL: https://github.com/apache/nuttx/pull/16706
## Summary
- Add `stm32_dma.[ch]` to the STM32H5 build when `CONFIG_STM32H5_DMA=y`
- Include `stm32h56x_dmasigmap.h` and update `stm32_gpdma.h` with H5
register and IRQ defs
- Expose ADC DMA options in `arch/arm/src/stm32h5/Kconfig`:
- `CONFIG_STM32H5_ADCx_DMA`
- `CONFIG_STM32H5_ADCx_DMA_BATCH`
- `CONFIG_STM32H5_ADCx_DMA_CFG`
- `STM32H5_ADC_MAX_SAMPLES`
- Extend `stm32_adc.[ch]` to track a `hasdma` flag per ADC (default `false`)
- Set `hasdma = true` only when DMA is enabled; skip IRQ registration if
`hasdma`
- Disable ADC IRQs when DMA is active to avoid mixed-mode conflicts
- Tidy formatting, align comments, and clean up whitespace across ADC and
DMA files
## Impact
- **New DMA support** for STM32H5 ADCs (one-shot, circular, batch)
- **Config changes**
- Must enable both `CONFIG_STM32H5_DMA` and per-ADC
`CONFIG_STM32H5_ADCx_DMA` to use DMA
- Default (no-DMA) stays the same
- **Build & ABI**
- `stm32_dma.c` only included under `CONFIG_STM32H5_DMA`
- No public API changes; `hasdma` is internal
- **Runtime**
- ADCs without DMA still use IRQs
- Mixed setups now work without spurious IRQs
- **Compatibility & docs**
- Backward-compatible for existing users
- No docs changed; consider updating STM32H5 board guide
- **Security & stability**
- No security impact; new paths gated by CONFIG flags and tested
## Testing
- One-shot mode verified
- Circular mode with linked-list (in `stm32_dma.c`) verified
- `dmabatch` verified with 1 Hz timer trigger; batch size multiplies sample
period
- HW: Channel 3→GND, Channel 10→3.3 V
- Used ADC example app; circular mode output:
```
NuttShell (NSH) NuttX-12.10.0
nsh> adc
adc_main: g_adcstate.count: 4
adc_main: Hardware initialized. Opening the ADC device: /dev/adc0
Sample:
1: channel: 3 value: 0
2: channel: 10 value: 4080
Sample:
1: channel: 3 value: 14
2: channel: 10 value: 4095
Sample:
1: channel: 3 value: 0
2: channel: 10 value: 4095
Sample:
1: channel: 3 value: 11
2: channel: 10 value: 4091
nsh>
```
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