update

app/src/app_event.h

@@ -1,8 +1,8 @@
 #pragma once
 #include <stdbool.h>
 #include <stdint.h>
+#include "board/board.h"
 
-#define LITTLE_DATA_BLOCK_FRAME_NUM 4  // 每四帧回调一次
 
 typedef enum {
   kevent_sensor_drop = 0,                  // 导联连接事件

app/src/board/board.h

@@ -60,7 +60,8 @@
 #define FILE_MAX_COUNT                       1
 #define SDCARD_MAX_FILE_SIZE                 (uint32_t)(3.5 * 1024 * 1024 * 1024)
 //
-#define SAMPLE_RATE      500
+#define SAMPLE_RATE                 400
+#define LITTLE_DATA_BLOCK_FRAME_NUM 4  // 每两帧回调一次,对应100HZ
 #define SAMPLE_PRECISION            24
 
 #define APP_MAX_EVEN_SIZE    MAX(APP_TIMER_SCHED_EVENT_DATA_SIZE, sizeof(app_event_t))

app/src/heart_wave_sample_service.c

@@ -414,7 +414,11 @@ void hwss_init(void) {
   if (err != NRFX_SUCCESS) {
     NRF_LOG_ERROR("nrfx_timer_init failed with: %d\n", err);
   }
-  uint32_t timer_ticks = nrfx_timer_ms_to_ticks(&m_timer, 2);  // 500HZ
+
+  ZASSERT(SAMPLE_RATE == 400);
+  uint32_t timer_ticks = nrfx_timer_ms_to_ticks(&m_timer, 5);  // 200HZ
+  ZASSERT(timer_ticks % 2 == 0);                               //
+  timer_ticks = timer_ticks / 2;                               // 400HZ
   nrfx_timer_extended_compare(&m_timer, NRF_TIMER_CC_CHANNEL0, timer_ticks, NRF_TIMER_SHORT_COMPARE0_CLEAR_MASK, true);
 }