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fix(vd960DBN): iot_mqtt_publish_sensor 栈溢出 — data_json[2KB] + payload[2KB] = 4KB 远超 2KB 栈

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每次主循环调 iot_mqtt_publish_sensor 都分配 4KB 栈变量，
直接栈溢出踩烂全局变量（含 g_iot_dev_serial→clientId=空），
最终在 iot_mqtt_send_connect→WCHNET_SocketSend 时 hard fault。
改为 static 彻底消除栈压力。
另加 iot_mqtt_send 调试日志。
This commit is contained in:
wangfq
2026-07-06 13:40:25 +08:00
parent de3a7c197e
commit 7459c0fa80
1 changed files with 4 additions and 2 deletions
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vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/iot_mqtt_srv.c
+4 -2
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@@ -71,7 +71,9 @@ static int iot_make_topic(char *out, uint16_t out_len, const char *direction,
/* 发送 MQTT 报文到 broker */ /* 发送 MQTT 报文到 broker */
static int iot_mqtt_send(const uint8_t *buf, uint16_t len) { static int iot_mqtt_send(const uint8_t *buf, uint16_t len) {
uint16_t slen = len; uint16_t slen = len;
PRINT("IOT: SocketSend sock=%d len=%d\n", g_iot_socket, len);
uint8_t ret = WCHNET_SocketSend(g_iot_socket, (uint8_t *)buf, &slen); uint8_t ret = WCHNET_SocketSend(g_iot_socket, (uint8_t *)buf, &slen);
PRINT("IOT: SocketSend ret=0x%02X sent=%d\n", ret, slen);
return (ret == WCHNET_ERR_SUCCESS) ? 0 : -1; return (ret == WCHNET_ERR_SUCCESS) ? 0 : -1;
} }
@@ -390,7 +392,7 @@ void iot_mqtt_publish_sensor(void) {
} }
/* 构建 loop_data JSON */ /* 构建 loop_data JSON */
char data_json[2048]; static char data_json[2048]; // static: 避免 2KB 栈溢出
char *p = data_json; char *p = data_json;
int remaining = sizeof(data_json); int remaining = sizeof(data_json);
int written; int written;
@@ -433,7 +435,7 @@ void iot_mqtt_publish_sensor(void) {
snprintf(p, remaining, "]}"); snprintf(p, remaining, "]}");
/* 包装为通用消息格式 */ /* 包装为通用消息格式 */
char payload[IOT_MQTT_SEND_BUF_LEN]; static char payload[IOT_MQTT_SEND_BUF_LEN]; // static: 避免 2KB 栈溢出
snprintf(payload, sizeof(payload), snprintf(payload, sizeof(payload),
"{\"msg_id\":%d,\"cmd\":\"loop_data\",\"ts\":%lu,\"data\":%s}", "{\"msg_id\":%d,\"cmd\":\"loop_data\",\"ts\":%lu,\"data\":%s}",
++g_iot_msg_id, mstick() / 1000, data_json); ++g_iot_msg_id, mstick() / 1000, data_json);