sl-firmware
972db16635
Balance side (uart_ota.c): downloads io-firmware.bin from Gitea to RAM, computes SHA256, then streams to IO over UART1 (GPIO17/18, 460800 baud) as OTA_BEGIN/OTA_DATA/OTA_END frames with CRC8 + per-chunk ACK/retry (×3). IO side (uart_ota_recv.c): receives frames, writes to inactive OTA partition via esp_ota_write, verifies SHA256 on OTA_END, sets boot partition, reboots. IO board main.c + CMakeLists.txt scaffold included. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
65 lines
2.0 KiB
C
65 lines
2.0 KiB
C
#pragma once
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/* uart_ota.h — UART OTA protocol for Balance→IO firmware update (bd-21hv)
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*
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* Balance downloads io-firmware.bin from Gitea, then streams it to the IO
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* board over UART1 (GPIO17/18, 460800 baud) in 1 KB chunks with ACK.
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*
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* Protocol frame format (both directions):
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* [TYPE:1][SEQ:2 BE][LEN:2 BE][PAYLOAD:LEN][CRC8:1]
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* CRC8-SMBUS over TYPE+SEQ+LEN+PAYLOAD.
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*
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* Balance→IO:
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* OTA_BEGIN (0xC0) payload: uint32 total_size BE + uint8[32] sha256
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* OTA_DATA (0xC1) payload: uint8[] chunk (up to 1024 bytes)
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* OTA_END (0xC2) no payload
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* OTA_ABORT (0xC3) no payload
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*
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* IO→Balance:
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* OTA_ACK (0xC4) payload: uint16 acked_seq BE
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* OTA_NACK (0xC5) payload: uint16 failed_seq BE + uint8 err_code
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* OTA_STATUS (0xC6) payload: uint8 state + uint8 progress%
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*/
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#include <stdint.h>
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#include <stdbool.h>
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/* UART for Balance→IO OTA */
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#include "driver/uart.h"
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#define UART_OTA_PORT UART_NUM_1
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#define UART_OTA_BAUD 460800
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#define UART_OTA_TX_GPIO 17
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#define UART_OTA_RX_GPIO 18
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#define OTA_UART_CHUNK_SIZE 1024
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#define OTA_UART_ACK_TIMEOUT_MS 3000
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#define OTA_UART_MAX_RETRIES 3
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/* Frame type bytes */
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#define UART_OTA_BEGIN 0xC0u
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#define UART_OTA_DATA 0xC1u
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#define UART_OTA_END 0xC2u
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#define UART_OTA_ABORT 0xC3u
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#define UART_OTA_ACK 0xC4u
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#define UART_OTA_NACK 0xC5u
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#define UART_OTA_STATUS 0xC6u
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/* NACK error codes */
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#define OTA_ERR_BAD_CRC 0x01u
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#define OTA_ERR_WRITE 0x02u
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#define OTA_ERR_SIZE 0x03u
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typedef enum {
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UART_OTA_S_IDLE = 0,
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UART_OTA_S_DOWNLOADING, /* downloading from Gitea */
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UART_OTA_S_SENDING, /* sending to IO board */
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UART_OTA_S_DONE,
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UART_OTA_S_FAILED,
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} uart_ota_send_state_t;
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extern volatile uart_ota_send_state_t g_uart_ota_state;
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extern volatile uint8_t g_uart_ota_progress;
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/* Trigger IO firmware update. Uses g_io_update (from gitea_ota).
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* Downloads bin, then streams via UART. Returns false if busy or no update. */
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bool uart_ota_trigger(void);
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