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Add UART OTA upload with A/B partition support.

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Firmware buffers 200-byte chunks into 4 KiB blocks for esp_ota_write; goTool
uploads with per-block ACK flow control and larger UART buffers to avoid stalls.

Co-authored-by: Cursor <cursoragent@cursor.com>
This commit is contained in:
skruecken
2026-05-19 00:39:59 +02:00
co-authored by Cursor
parent 1ad527119d
commit 59ca269407
20 changed files with 806 additions and 101 deletions
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main/README.md
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@@ -184,7 +184,11 @@ Host and master speak nanopb-encoded `UartMessage` inside UART frames (byte 0 =
| 4 | `CLIENT_INFO` | Implemented (`cmd_client_info.c`) — slave list from registry |
| 5 | `CLIENT_INPUT` | Planned |
| 6 | `ACCEL_DEADZONE` | Implemented (`cmd_accel_deadzone.c`) — get/set accel filter LSB |
| 16–20 | OTA / ESP-NOW OTA | Planned |
| 16 | `OTA_START` | Implemented (`cmd_ota.c`) — begin UART OTA on inactive slot |
| 17 | `OTA_PAYLOAD` | Implemented — up to 200 B per frame; device buffers 4 KiB |
| 18 | `OTA_END` | Implemented — flush, `esp_ota_end`, set boot partition |
| 19 | `OTA_STATUS` | Device → host (prepare/ready/block ACK/success/failed) |
| 20 | `OTA_START_ESPNOW` | Planned |
Regenerate C code:
@@ -208,9 +212,32 @@ Build embeds `POWERPOD_GIT_HASH` via `git rev-parse` in `main/CMakeLists.txt`.
- `type = VERSION`
- `version_response.version` — `POWERPOD_FW_VERSION`
- `version_response.git_hash` — build git hash string
- `version_response.running_partition` — active OTA label (`ota_0` / `ota_1`)
Encoding: `uart_send_uart_message()` in `uart_proto.c`.
At boot, firmware logs the running partition and OTA slot index (A/B).
### UART OTA (A/B)
Master only. Inactive app partition is selected with `esp_ota_get_next_update_partition()`; `esp_ota_begin` erases it (can take ~30 s — host should wait).
| Step | Host → device | Device → host |
|------|----------------|---------------|
| 1 | `OTA_START` + `total_size` | `OTA_STATUS` preparing, then **ready** (+ `target_slot` 0/1) |
| 2 | `OTA_PAYLOAD` chunks (**≤200 B**, `seq` optional) | `OTA_STATUS` **block_ack** only after each **4096 B** written to flash |
| 3 | `OTA_END` | `OTA_STATUS` **success** or **failed** (+ `bytes_written`) |
Implementation: `ota_uart.c` (4 KiB buffer, `esp_ota_write`), `cmd_ota.c`.
Host upload:
```bash
go run . -port /dev/ttyUSB0 ota build/powerpod.bin
```
`OtaStatusPayload.status`: `1` preparing, `2` ready, `3` block_ack, `4` success, `5` failed.
### ACCEL_DEADZONE command
Sets the **software** deadzone used by `bosch456.c` when logging accel (see [BMA456 accelerometer](#bma456-accelerometer-bosch456c)). Default **100** LSB.