275 lines
11 KiB
C
275 lines
11 KiB
C
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/* net_wifi_ota.c - WiFi 通道 OTA 固件下载
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*
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* ESP-01S 是单连接透传（CIPMUX=0），OTA 期间必须拆掉 MQTT 连接：
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* 退透传("+++") → 连固件服务器 → 透传发 HTTP GET → 流式接收固件体
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* → 每 3072B 写 W25Q64 槽 B + 回读校验 + 累计 CRC16
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* → 整包 CRC + 固件头校验 → 重连 MQTT 上报结果 → 写 OTA 信息区 → 复位进 BL
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*
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* 参考工程《4路继电器控制带WIFI和4G V3.4 WIFI无回弹》的透传整包下载思路，
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* 但复用本工程 W25Q64 双槽 + CRC + 向量校验 + BootLoader 回退体系（比参考工程
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* 写内部 Flash APP2 的方案可靠得多）。吞吐靠 TCP 流控自适应：MCU 消费慢时
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* 接收窗口收缩，服务器自然降速，不会丢字节。
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*/
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#include "net_wifi_ota.h"
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#include "net_wifi.h"
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#include "esp8266.h"
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#include "network.h"
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#include "air780e.h" /* bg_delay / U2_CopyBuff / Verify_Firmware_External / crc16_modbus_update */
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#include "ota_app.h" /* Application_Size */
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#include "uart.h"
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#include "relay.h"
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#include "feed_scale.h"
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#include "led.h"
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#include "log.h"
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#include "../W25Q64/w25q64.h"
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#include "stdio.h"
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#include "string.h"
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#include <stdlib.h>
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#define WIFI_OTA_CHUNK 3072u /* 与 4G OTA 相同的分块粒度 */
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#define WIFI_OTA_HDR_TIMEOUT 15000u /* 等 HTTP 响应头超时 */
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#define WIFI_OTA_IDLE_TIMEOUT 20000u /* 数据流静默超时（TCP 流控可能主动降速） */
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static uint8_t s_blk[WIFI_OTA_CHUNK]; /* 分块暂存：写flash/校验/CRC 都按块处理 */
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/* 二进制安全子串查找 */
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static uint8_t *ota_memfind(uint8_t *hay, uint16_t hay_len, const char *needle)
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{
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uint16_t nlen = strlen(needle);
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if (hay_len < nlen) return NULL;
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for (uint16_t i = 0; i <= hay_len - nlen; i++) {
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if (memcmp(hay + i, needle, nlen) == 0) return hay + i;
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}
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return NULL;
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}
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/* 大小写不敏感查找（Content-Length 头各服务器大小写不一） */
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static uint8_t *ota_memfind_i(uint8_t *hay, uint16_t hay_len, const char *needle)
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{
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uint16_t nlen = strlen(needle);
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if (hay_len < nlen) return NULL;
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for (uint16_t i = 0; i <= hay_len - nlen; i++) {
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uint16_t j;
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for (j = 0; j < nlen; j++) {
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char a = hay[i + j], b = needle[j];
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if (a >= 'A' && a <= 'Z') a += 32;
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if (b >= 'A' && b <= 'Z') b += 32;
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if (a != b) break;
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}
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if (j == nlen) return hay + i;
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}
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return NULL;
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}
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/* 消费接收缓冲前 n 字节 */
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static void ota_consume(uint16_t n)
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{
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if (n >= U2_CopyIndex) {
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U2_CopyIndex = 0;
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} else {
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memmove(U2_CopyBuff, U2_CopyBuff + n, U2_CopyIndex - n);
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U2_CopyIndex -= n;
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}
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U2_CopyBuff[U2_CopyIndex] = '\0';
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}
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/*==== HTTP Range 分块下载固件到 W25Q64 槽 B，成功返回 0 且 *out_size=固件大小 ====
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* 每块 3072B 一个 GET（Range: bytes=off-end），MCU 自定节奏：
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* 服务器一次只发一块，不存在大流量灌爆接收缓冲的问题（实测整包下载时
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* 服务器 6 秒灌完 57KB，MCU 写 flash 消费不动，缓冲溢出丢字节）。 */
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static int wifi_ota_download(const char *host, int port, const char *path,
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uint16_t crc16, uint32_t *out_size)
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{
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char req[224];
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uint32_t offset = 0, total_size = 0;
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uint16_t crc_acc = 0xFFFF;
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int last_pct = -1;
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/* 拆掉 MQTT 连接，换连固件服务器（同为透传模式） */
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esp_exit_transparent();
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if (esp_enter_transparent(host, (uint16_t)port) != 0) {
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log_warn("> WiFi OTA: connect firmware server failed");
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return -1;
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}
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while (1) {
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/* 最后一块按总大小截断（total_size 第一块响应头里才拿到） */
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uint32_t want_end = offset + WIFI_OTA_CHUNK - 1;
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if (total_size > 0 && want_end >= total_size) want_end = total_size - 1;
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/* HTTP/1.1 默认 keep-alive，同一 TCP 连接上顺序发多个 Range 请求 */
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snprintf(req, sizeof(req),
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"GET %s HTTP/1.1\r\nHost: %s:%d\r\nUser-Agent: esp8266-ota\r\nAccept: */*\r\nRange: bytes=%u-%u\r\n\r\n",
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path, host, port, (unsigned)offset, (unsigned)want_end);
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esp_rx_clear();
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esp_send((uint8_t *)req, strlen(req));
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/* 等响应头完整（\r\n\r\n 结束） */
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uint32_t hdr_end = 0;
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uint32_t tick = HAL_GetTick();
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while (HAL_GetTick() - tick < WIFI_OTA_HDR_TIMEOUT) {
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bg_delay(50);
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uint8_t *p = ota_memfind(U2_CopyBuff, U2_CopyIndex, "\r\n\r\n");
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if (p) { hdr_end = (uint32_t)(p - U2_CopyBuff) + 4; break; }
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if (ota_memfind(U2_CopyBuff, U2_CopyIndex, "CLOSED")) {
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log_warn("> WiFi OTA: server closed @%u", (unsigned)offset);
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return -1;
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}
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}
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if (hdr_end == 0) {
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log_warn("> WiFi OTA: header timeout @%u", (unsigned)offset);
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return -1;
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}
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/* 必须 206（服务器支持 Range；200 说明忽略了 Range，整包灌流量消费不动，放弃） */
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if (strncmp((char *)U2_CopyBuff, "HTTP/", 5) != 0) {
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log_warn("> WiFi OTA: bad response @%u", (unsigned)offset);
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return -1;
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}
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if (!ota_memfind(U2_CopyBuff, 16, " 206")) {
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U2_CopyBuff[hdr_end < 120 ? hdr_end : 120] = '\0';
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log_warn("> WiFi OTA: not 206 (server no Range?): %.60s", U2_CopyBuff);
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return -1;
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}
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/* 第一块：从 Content-Range: bytes 0-x/TOTAL 拿总大小，然后擦槽 B */
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if (total_size == 0) {
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uint8_t *cr = ota_memfind_i(U2_CopyBuff, hdr_end, "content-range:");
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uint8_t *slash = cr ? (uint8_t *)strchr((char *)cr, '/') : NULL;
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if (slash) total_size = (uint32_t)atoi((char *)slash + 1);
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if (total_size == 0 || total_size > Application_Size) {
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log_warn("> WiFi OTA: bad total size %u", (unsigned)total_size);
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return -1;
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}
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log_info("**************************************");
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log_info("* WiFi OTA Update Start *");
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log_info("* Size: %u bytes *", (unsigned)total_size);
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log_info("**************************************");
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log_info("> Erasing W25Q64 new slot...");
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W25Q64_EraseRegion(W25Q64_SLOT_NEW_ADDR, W25Q64_SLOT_SIZE);
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log_info("> W25Q64 new slot erased");
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}
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/* 本块长度 = Content-Length（≤3072，最后一块可能更小） */
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uint32_t clen = 0;
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{
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uint8_t *cl = ota_memfind_i(U2_CopyBuff, hdr_end, "content-length:");
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if (cl) clen = (uint32_t)atoi((char *)cl + 15);
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}
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if (clen == 0 || clen > WIFI_OTA_CHUNK) {
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log_warn("> WiFi OTA: bad chunk len %u @%u", (unsigned)clen, (unsigned)offset);
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return -1;
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}
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ota_consume((uint16_t)hdr_end);
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/* 精确收 clen 字节固件体到暂存块 */
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uint16_t got = 0;
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tick = HAL_GetTick();
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while (got < clen) {
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if (U2_CopyIndex > 0) {
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tick = HAL_GetTick();
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uint16_t n = U2_CopyIndex;
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if (n > (uint16_t)(clen - got)) n = (uint16_t)(clen - got);
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memcpy(s_blk + got, U2_CopyBuff, n);
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got += n;
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ota_consume(n);
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} else {
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if (HAL_GetTick() - tick > WIFI_OTA_IDLE_TIMEOUT) {
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log_warn("> WiFi OTA: body timeout @%u got %u/%u",
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(unsigned)offset, got, (unsigned)clen);
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log_warn("> OTA diag: CNDTR=%u RxState=%u rxcplt=%u ore=%u pending=%u",
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(unsigned)huart4.hdmarx->Instance->CNDTR,
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(unsigned)huart4.RxState,
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(unsigned)g_uart4_rxcplt_cnt,
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(unsigned)g_uart4_ore_cnt,
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(unsigned)U2_CopyIndex);
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return -1;
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}
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bg_delay(20);
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}
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}
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/* 写 W25Q64 槽 B + 回读校验 + 累计 CRC */
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W25Q64_WriteBuffer(W25Q64_SLOT_NEW_ADDR + offset, s_blk, clen);
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if (!W25Q64_Verify(W25Q64_SLOT_NEW_ADDR + offset, s_blk, clen)) {
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log_error("> WiFi OTA: W25Q64 verify fail at offset=%u", (unsigned)offset);
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return -1;
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}
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for (uint16_t i = 0; i < clen; i++) {
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crc_acc = crc16_modbus_update(crc_acc, s_blk[i]);
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}
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offset += clen;
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int pct = (int)(offset * 100 / total_size);
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if (pct > 100) pct = 100;
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if (pct / 10 > last_pct / 10) {
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last_pct = pct;
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log_info("> [%3d%%] %u/%uB", pct, (unsigned)offset, (unsigned)total_size);
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LED2_TOGGLE;
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}
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if (offset >= total_size) break;
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}
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/* 整包 CRC16 校验 */
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log_info("> W25Q64 CRC16=0x%04X (server=0x%04X)", crc_acc, crc16);
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if (crc16 != 0 && crc_acc != crc16) {
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log_error("> WiFi OTA: CRC16 mismatch! abort");
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return -1;
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}
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/* 固件头合法性校验（栈顶/复位向量） */
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if (!Verify_Firmware_External(W25Q64_SLOT_NEW_ADDR, total_size)) {
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log_error("> WiFi OTA: firmware header invalid");
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return -1;
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}
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*out_size = total_size;
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log_info("> WiFi OTA: download complete, %uB OK", (unsigned)total_size);
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return 0;
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}
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/*==== WiFi OTA 入口：与 air780e_trigger_ota 对齐的语义 ====
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* 成功：上报 result=1 后写信息区直接复位进 BootLoader；
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* 失败：上报 result=0，恢复 MQTT 链路继续正常业务 */
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void net_wifi_ota(const char *host, int port, const char *path,
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const char *ota_id, uint16_t new_ver, uint16_t crc16)
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{
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uint32_t file_size = 0;
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log_info("> WiFi OTA: in");
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feedScaleStop(); /* 称重模式下停止投喂状态机 */
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relaySet(1, 0); /* 无秤模式下直接断开投喂继电器 */
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/* MQTT 还在线：先上报开始（progress 0），再屏蔽业务发布 */
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NET_mqtt_report("iot.ota.progress.post", ota_id, 0);
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bg_delay(500);
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g_net_tx_busy = 1;
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g_wifi_mqtt_ready = 0; /* MQTT 链路即将被 OTA 连接顶替 */
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int ret = wifi_ota_download(host, port, path, crc16, &file_size);
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/* 重连 MQTT（走完整 WiFi 建链：复位模块→连AP→透传→CONNECT/SUB）上报结果 */
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if (net_wifi_init() == 0) {
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g_net_tx_busy = 0;
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NET_mqtt_report("iot.ota.result.post", ota_id, ret == 0 ? 1 : 0);
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bg_delay(2000); /* 等结果消息发完 */
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} else {
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g_net_tx_busy = 0;
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log_warn("> WiFi OTA: MQTT reconnect failed, result report lost");
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}
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if (ret == 0) {
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log_info("**************************************");
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log_info("* WiFi OTA Download Complete! *");
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log_info("* Rebooting to BootLoader... *");
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log_info("**************************************");
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/* 只把固件信息写入 W25Q64，版本号在 APP 确认成功后再写入 EEPROM */
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W25Q64_OTA_SetNewInfo(new_ver, file_size, crc16);
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bg_delay(100);
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NVIC_SystemReset();
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}
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log_warn("> WiFi OTA: aborted, resume normal operation");
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}
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