From cbffe5ec773b47b92ee416c9b78c6a0872da5567 Mon Sep 17 00:00:00 2001
From: penglei <1624952103@qq.com>
Date: Thu, 8 Jan 2026 18:26:49 +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 | 41 +++++++++++++++------
 1 file changed, 30 insertions(+), 11 deletions(-)

diff --git a/code/sdk/zhihui/drivers/ppg/hx3695/hx3695.c b/code/sdk/zhihui/drivers/ppg/hx3695/hx3695.c
index 3ae5fc629..4ba09374d 100644
--- a/code/sdk/zhihui/drivers/ppg/hx3695/hx3695.c
+++ b/code/sdk/zhihui/drivers/ppg/hx3695/hx3695.c
@@ -368,7 +368,7 @@ uint16_t hx3695_read_fifo_data(ppg_sensor_data_t *ppg_sensor_dat)
     uint16_t fifo_read_length = 0;
     uint16_t fifo_read_bytes = 0;
 	uint16_t fifo_out_count = 0;
-
+    uint8_t retry_cnt = 0;
     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);
@@ -388,13 +388,23 @@ uint16_t hx3695_read_fifo_data(ppg_sensor_data_t *ppg_sensor_dat)
 
     // 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 > threshold)
+    {
+        for(int i = 0 ; i < 3; i++)
+        {
+            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 > threshold)
+            {
+                retry_cnt ++;
+            }
+            else
+                break;
+        }
+    }
+
 
     if (fifo_data_length>FIFO_DATA_LENGTH)
     {
@@ -417,6 +427,15 @@ uint16_t hx3695_read_fifo_data(ppg_sensor_data_t *ppg_sensor_dat)
 
 	hx3695_get_led_para(ppg_sensor_dat);
 
+    if(retry_cnt >= 3)
+    {
+        if(work_mode_flag == WEAR_MODE)
+            fifo_out_count = 25;
+        else
+            fifo_out_count = 8;
+    }
+
+
     return fifo_out_count;
 }
 
@@ -501,11 +520,11 @@ void hx3695_software_reset(void)
 	#endif
 }
 
-bool hx3695_check_wear(ppg_sensor_data_t *ppg_sensor_dat)
+bool hx3695_check_wear(ppg_sensor_data_t *ppg_sensor_dat,uint8_t count)
 {
     uint8_t ii = 0;
     
-    for(ii=0;ii<ppg_sensor_dat->led_data[3].data_count;ii++)
+    for(ii=0;ii<count;ii++)
     {
         if(ppg_sensor_dat->led_data[3].data_val[ii] > CHECK_WEAR_THRE)
         {
@@ -1570,7 +1589,7 @@ void hx3695_ppg_Int_handle(ppg_sensor_data_t *ppg_sensor_dat)
     // printf("count:%d\n",count);
     if(count > 0)
     {
-        hx3695_check_wear(ppg_sensor_dat);
+        hx3695_check_wear(ppg_sensor_dat,count);
         if(wear_status == MSG_WEAR)
         {
             hx3695_alg_send_data(ppg_sensor_dat,work_mode_flag,count);
-- 
2.17.1