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fix(vd960DBN): MQTT buffer 从栈改为 static，防止栈溢出 (栈仅 2KB)

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iot_mqtt_send_connect:  opts(~85B) + buf[256]  → static (~340B 省)
iot_mqtt_send_subscribe: buf[256]              → static (256B 省)
iot_mqtt_publish:        buf[2048]             → static (2KB 省)
调用链 WCHNET_HandleGlobalInt → iot_mqtt_handle_sock_int
→ iot_mqtt_send_connect 会叠加 WCHNET 协议栈内部开销，
2048B 栈极易溢出导致 hard fault（现象：乱码+truncated日志+重启）
This commit is contained in:
wangfq
2026-07-06 11:27:08 +08:00
parent c0220c1d37
commit dfadc26717
1 changed files with 6 additions and 4 deletions
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vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/iot_mqtt_srv.c
+6 -4
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@@ -77,10 +77,12 @@ static int iot_mqtt_send(const uint8_t *buf, uint16_t len) {
/* 发送 MQTT CONNECT */
static int iot_mqtt_send_connect(void) {
MQTTPacket_connectData opts = MQTTPacket_connectData_initializer;
uint8_t buf[256];
static MQTTPacket_connectData opts; // static: 避免 85字节栈开销
static uint8_t buf[256]; // static: 避免 256字节栈开销
int len;
opts = MQTTPacket_connectData_initializer;
opts.MQTTVersion = 4; // MQTT 3.1.1
opts.keepAliveInterval = IOT_MQTT_KEEPALIVE_SEC;
opts.cleansession = 1;
@@ -112,7 +114,7 @@ static int iot_mqtt_send_connect(void) {
/* 发送 MQTT SUBSCRIBE */
static int iot_mqtt_send_subscribe(void) {
uint8_t buf[256];
static uint8_t buf[256]; // static: 避免栈溢出
int len;
char topic[IOT_MQTT_TOPIC_MAX_LEN];
MQTTString topics[3];
@@ -142,7 +144,7 @@ static int iot_mqtt_send_subscribe(void) {
/* 发送 MQTT PUBLISH */
static int iot_mqtt_publish(const char *topic, const char *payload,
uint16_t payload_len, uint8_t qos) {
uint8_t buf[IOT_MQTT_SEND_BUF_LEN];
static uint8_t buf[IOT_MQTT_SEND_BUF_LEN]; // static: 避免 2KB 栈溢出
int len;
MQTTString mqtt_topic = MQTTString_initializer;
mqtt_topic.cstring = (char *)topic;