diff --git a/chip/delay.c b/chip/delay.c
index ec2257b..6d10c2c 100644
--- a/chip/delay.c
+++ b/chip/delay.c
@@ -36,3 +36,10 @@ uint32_t haspassedms(uint32_t ticket) {
   }
   return UINT32_MAX - ticket + nowticket;
 }
+
+uint32_t haspassedms2(uint32_t lastticket, uint32_t nowticket) {
+  if (nowticket >= lastticket) {
+    return nowticket - lastticket;
+  }
+  return UINT32_MAX - lastticket + nowticket;
+}
diff --git a/chip/delay.h b/chip/delay.h
index 228a806..19db76a 100644
--- a/chip/delay.h
+++ b/chip/delay.h
@@ -12,6 +12,8 @@ void chip_delay_ms(uint32_t n);
 void ifly_delay_ms(uint32_t n);
 
 uint32_t chip_get_ticket();
+uint32_t haspassedms(uint32_t ticket);
+uint32_t haspassedms2(uint32_t lastticket, uint32_t nowticket);
 
 #ifdef __cplusplus
 }
diff --git a/hal/zhal.hpp b/hal/zhal.hpp
new file mode 100644
index 0000000..15e86bc
--- /dev/null
+++ b/hal/zhal.hpp
@@ -0,0 +1,4 @@
+#pragma once
+#include "../chip/iflytop_no_os.h"
+#include "gpio.hpp"
+#include "zhal_core.hpp"
diff --git a/hal/zhal_core.cpp b/hal/zhal_core.cpp
new file mode 100644
index 0000000..56e4774
--- /dev/null
+++ b/hal/zhal_core.cpp
@@ -0,0 +1,33 @@
+#include "zhal_core.hpp"
+using namespace std;
+using namespace iflytop;
+namespace iflytop {
+ZHALCORE ZHALCORE_instance;
+}
+
+void ZHALCORE::regPeriodJob(function<void(Context& context)> job, uint32_t period_ms) {
+  PeriodJob* periodJob = new PeriodJob(job, period_ms);
+  ZASSERT(periodJob != NULL);
+  m_periodJobs.push_back(periodJob);
+}
+
+void ZHALCORE::loop() {
+  static uint32_t ticket = 0;
+  Context         context;
+  if (haspassedms(ticket) < 1) {
+    return;
+  }
+  ticket = chip_get_ticket();
+  for (auto iter = m_periodJobs.begin(); iter != m_periodJobs.end(); iter++) {
+    auto periodJob = *iter;
+
+    if (haspassedms2(periodJob->lastcall, ticket) < periodJob->period_ms) {
+      continue;
+    }
+
+    context.periodJob   = periodJob;
+    periodJob->lastcall = ticket;
+    periodJob->job(context);
+    periodJob->schedule_times++;
+  }
+}
diff --git a/hal/zhal_core.hpp b/hal/zhal_core.hpp
new file mode 100644
index 0000000..e7638d0
--- /dev/null
+++ b/hal/zhal_core.hpp
@@ -0,0 +1,52 @@
+#pragma once
+#include <stdio.h>
+
+#include <functional>
+#include <list>
+
+#include "../chip/iflytop_no_os.h"
+//
+namespace iflytop {
+using namespace std;
+class ZHALCORE;
+extern ZHALCORE ZHALCORE_instance;
+
+class ZHALCORE {
+ public:
+  class PeriodJob;
+  class Context {
+    friend class ZHALCORE;
+
+   protected:
+    PeriodJob* periodJob;
+
+   public:
+  };
+
+  class PeriodJob {
+   public:
+    PeriodJob(function<void(Context& context)> job, uint32_t period_ms) {
+      this->job       = job;
+      this->period_ms = period_ms;
+    }
+    function<void(Context& context)> job;
+    uint32_t                         period_ms      = 0;
+    uint32_t                         lastcall       = 0;
+    uint32_t                         schedule_times = 0;
+  };
+
+  list<PeriodJob*> m_periodJobs;
+
+ public:
+  ZHALCORE() {}
+  static ZHALCORE* getInstance() { return &ZHALCORE_instance; }
+
+  void initialize(){};
+
+  void regPeriodJob(function<void(Context& context)> job, uint32_t period_ms);
+  void loop();
+};
+
+#define ZHAL_CORE_REG(period_ms, job) ZHALCORE::getInstance()->regPeriodJob([this](ZHALCORE::Context& context) { job }, period_ms);
+
+}  // namespace iflytop
\ No newline at end of file