From 00b009d69e77ce7559b20332a6d47bf91a354e07 Mon Sep 17 00:00:00 2001
From: penglei <1624952103@qq.com>
Date: Thu, 8 Jan 2026 16:39:24 +0800
Subject: [PATCH] =?utf8?q?=E4=BC=98=E5=8C=96272=E5=BF=83=E7=8E=87=E7=AA=81?=
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---
 code/sdk/zhihui/drivers/ppg/hx3695/hx3695.c | 35 ++++++++++++++++-----
 1 file changed, 28 insertions(+), 7 deletions(-)

diff --git a/code/sdk/zhihui/drivers/ppg/hx3695/hx3695.c b/code/sdk/zhihui/drivers/ppg/hx3695/hx3695.c
index 3a28e43e2..3ae5fc629 100644
--- a/code/sdk/zhihui/drivers/ppg/hx3695/hx3695.c
+++ b/code/sdk/zhihui/drivers/ppg/hx3695/hx3695.c
@@ -372,14 +372,35 @@ uint16_t hx3695_read_fifo_data(ppg_sensor_data_t *ppg_sensor_dat)
     data_len_h = hx3695_read_reg(0x21);
     data_len_l = hx3695_read_reg(0x20);
     fifo_data_length = (((data_len_h&0x01)<<8)|data_len_l);
+    // printf("111 fifo data length %d %d %d\n", data_len_h, data_len_l, fifo_data_length);
+		// DEBUG_PRINTF("fifo_data_length: %d\r\n", fifo_data_length);
 
-		DEBUG_PRINTF("fifo_data_length: %d\r\n", fifo_data_length);
-	
-		if (fifo_data_length>FIFO_DATA_LENGTH)
-		{
-				fifo_data_length = FIFO_DATA_LENGTH;
-		}
-		
+    int threshold = 0;
+
+    if(work_mode_flag == WEAR_MODE)
+    {
+        threshold = (ppg_sensor_dat->led_activated)*(ppg_sensor_dat->fs/5)*40;
+    }
+    else
+    {
+        threshold = (ppg_sensor_dat->led_activated)*(ppg_sensor_dat->fs/5)*4;
+    }
+
+    // printf("threshold : %d\n",threshold);
+
+	if(fifo_data_length > threshold)
+	{
+		data_len_h = hx3695_read_reg(0x21);
+    	data_len_l = hx3695_read_reg(0x20);
+    	fifo_data_length = (((data_len_h&0x01)<<8)|data_len_l);
+		// printf("222 fifo data length again %d %d %d\n", data_len_h, data_len_l, fifo_data_length);
+	}
+
+    if (fifo_data_length>FIFO_DATA_LENGTH)
+    {
+            fifo_data_length = FIFO_DATA_LENGTH;
+    }
+    
     if(fifo_data_length<2*ppg_sensor_dat->led_activated)
     {
         return 0;
-- 
2.17.1