diff --git a/dtest/dtest3/kl3_gpio_uart/Makefile b/dtest/dtest3/kl3_gpio_uart/Makefile
new file mode 100644
index 0000000..6228285
--- /dev/null
+++ b/dtest/dtest3/kl3_gpio_uart/Makefile
@@ -0,0 +1,62 @@
+
+# OUTPUT type
+# 1 - .out
+# 2 - .a
+# 3 - .so
+OUTPUT_TYPE	= 1
+OUTPUT_NAME	= kl3_gpio_uart
+
+SUB_DIRS 	= $(TOPDIR)/dtest/dtest3/common
+
+# .h files dir
+ADD_INCLUDE += $(TOPDIR)/plc/halphy/inc $(TOPDIR)/inc/compiler/gcc $(TOPDIR)/inc $(TOPDIR)/inc/io_lib $(TOPDIR)/inc/driver $(TOPDIR)/inc/uart $(TOPDIR)/inc/plc_lib $(TOPDIR)/inc/ipc $(TOPDIR)/inc/os_shim $(TOPDIR)/inc/pkt $(TOPDIR)/inc/utils $(TOPDIR)/plc/inc $(TOPDIR)/inc/cli $(TOPDIR)/cli/communicator $(TOPDIR)/inc/dbglog  $(TOPDIR)/inc/ftm $(TOPDIR)/plc/halmac/inc $(TOPDIR)/plc/halmac/hw/inc/desc $(TOPDIR)/driver/inc $(TOPDIR)/driver/inc/pib
+
+PRE_MARCO   += _MODULE_NAME_=\"GPIO\" _MODULE_VERSION_=\"V1.0.0\"
+
+LD_SCRIPT = link_soc.lds
+OPT_FLAG = -O0 -g
+
+ifeq ($(gcc), arm)
+ADD_INCLUDE += $(TOPDIR)/os/freertos/src/portable/ARM_CM3
+else
+ADD_INCLUDE += $(TOPDIR)/os/freertos/src/portable/RISCV $(TOPDIR)/dtest/dtest3/common
+endif
+
+ifeq ($(gcc),arm)
+ADD_LIB = cm3
+ADD_LIBDIR  = $(TOPDIR)/startup/cm3
+else
+    ifeq ($(target), kunlun3)
+    ADD_LIB = riscv
+    ADD_LIBDIR  =$(TOPDIR)/startup/riscv3
+    ADD_INCLUDE += $(TOPDIR)/driver/src/hw3/inc
+    endif
+endif
+
+# lib dir
+ADD_LIBDIR  += $(TOPDIR)/plc $(TOPDIR)/driver $(TOPDIR)/common $(TOPDIR)/os $(TOPDIR)/pib
+# lib need to ld together
+ADD_LIB  += os driver common pib
+
+#####################################################
+
+ifdef TOPDIR
+include $(TOPDIR)/build/makefile.cfg
+else
+include $(CURDIR)/build/makefile.cfg
+TOPDIR		= $(CURDIR)
+export TOPDIR
+endif
+
+dump:
+	$(OBJDUMP) -D -S -l $(OUTPUT_FULL_NAME) > $(OUTPUT_FULL_NAME).dump
+
+# display the obj files and output name
+debug:
+	@echo TOPDIR=$(TOPDIR)
+	@echo OUTPUT_LIB=$(OUTPUT_FULL_NAME)
+	@echo DEPS=$(DEPS)
+	@echo OBJECTS=$(OBJECTS)
+	@echo SRCS=$(SRCS)
+	@echo OBJECTS folder=$(foreach dirname, $(SUB_DIRS), $(addprefix $(BIN_DIR)/, $(dirname)))
+	@echo output_name=$(OUTPUT_FULL_NAME)
diff --git a/dtest/dtest3/kl3_gpio_uart/kl3_gpio_uart.c b/dtest/dtest3/kl3_gpio_uart/kl3_gpio_uart.c
new file mode 100644
index 0000000..81ef27e
--- /dev/null
+++ b/dtest/dtest3/kl3_gpio_uart/kl3_gpio_uart.c
@@ -0,0 +1,387 @@
+/****************************************************************************
+
+Copyright(c) 2019 by Aerospace C.Power (Chongqing) Microelectronics. ALL RIGHTS RESERVED.
+
+This Information is proprietary to Aerospace C.Power (Chongqing) Microelectronics and MAY NOT
+be copied by any method or incorporated into another program without
+the express written consent of Aerospace C.Power. This Information or any portion
+thereof remains the property of Aerospace C.Power. The Information contained herein
+is believed to be accurate and Aerospace C.Power assumes no responsibility or
+liability for its use in any way and conveys no license or title under
+any patent or copyright and makes no representation or warranty that this
+Information is free from patent or copyright infringement.
+
+****************************************************************************/
+/* os shim includes */
+#include "os_types.h"
+#include "os_task.h"
+#include "os_utils.h"
+
+/* common includes */
+#include "iot_io.h"
+#include "iot_bitops.h"
+#include "iot_pkt.h"
+#include "iot_ipc.h"
+#include "iot_dbglog_api.h"
+#include "iot_config.h"
+
+/* driver includes */
+#include "iot_clock.h"
+#include "iot_uart.h"
+#include "uart.h"
+#include "apb_dma.h"
+#include "dma_hw.h"
+
+/* cli includes */
+#include "iot_cli.h"
+#include "iot_uart_h.h"
+
+/* debug includes*/
+#include "dbg_io.h"
+/* driver includes */
+#include "cpu.h"
+#include "iot_gpio_api.h"
+#include "hw_reg_api.h"
+#include "pin_rf.h"
+#include "dtest_printf.h"
+#include "iot_share_task.h"
+#include "ahb.h"
+#include "rtc.h"
+#include "clk.h"
+
+extern int platform_init();
+
+os_task_h test_init_handle;
+
+static const iot_pkt_config_t test_pkt_config =
+{
+    {
+        {
+            256,
+            1,
+            PKT_OWNER_ALL,
+        },
+        {
+            600,
+            1,
+            PKT_OWNER_ALL,
+            },
+        {
+            1100,
+            1,
+            PKT_OWNER_ALL,
+        },
+        {
+            2200,
+            1,
+            PKT_OWNER_ALL,
+        },
+        {
+            0,
+            0,
+            PKT_OWNER_NONE,
+        },
+        {
+            0,
+            0,
+            PKT_OWNER_NONE,
+        },
+        {
+            0,
+            0,
+            PKT_OWNER_NONE,
+        },
+        {
+            0,
+            0,
+            PKT_OWNER_NONE,
+        },
+    }
+};
+
+
+
+#define UART_BAUD_RATE 115200
+
+
+#define GPIO_FUNC_MASK 0x70
+
+#define TEST_OUTPUT     28
+
+#define USE_HEAD_TAIL       0
+
+static uint32_t g_cpu_cycle;
+
+int int_mode = GPIO_INT_LEVEL_LOW;
+
+enum _vuart_check_type{
+    VUART_NONE = 0,
+    VUART_ODD = 1,
+    VUART_EVEN = 2,
+    VUART_MARK = 3,
+    VUART_SPACE = 4,
+};
+
+static void gpio_func_set(uint8_t gpio_no, uint8_t func)
+{
+    uint32_t tmp;
+    uint32_t addr;
+
+    addr = CFG_GPIO00_PIN_CFG_ADDR + (gpio_no << 2);
+
+    tmp = DIG_PIN_READ_REG(addr);
+    /* Set function */
+    tmp &= ~(GPIO_FUNC_MASK);
+    tmp |= (func<<4)&GPIO_FUNC_MASK;
+    /* Set pull-up */
+    tmp &= ~0x40;
+    tmp |= 0x80;
+    DIG_PIN_WRITE_REG(addr, tmp);
+
+    return ;
+}
+
+static uint16_t get_high_bit_num(uint8_t d) {
+    uint16_t num = 0;
+    for (int i = 0;i < 8;i++) {
+        if (d & (1 << i)) {
+            num++;
+        }
+    }
+    return num;
+}
+
+static int put_start() {
+    // 高电平停止位
+    #if USE_HEAD_TAIL
+    iot_gpio_value_set(TEST_OUTPUT, 1);
+    iot_delay_cpu_cycle(g_cpu_cycle * 10);
+    #endif
+    return 0;
+}
+
+static int put_byte(uint8_t data,int check) {
+    uint16_t p = data;
+    int bit_num = 8;
+    uint16_t high_bit_num = get_high_bit_num(data);
+    if (check != VUART_NONE) {
+        bit_num += 1;
+        if (check == VUART_ODD) {
+            p |= ((~high_bit_num) & 1)<<8;
+        } else if (check == VUART_EVEN) {
+            p |= (high_bit_num & 1)<<8;
+        } else if (check == VUART_MARK) {
+            p |= 1<<8;
+        }
+        // 其余情况默认校验位为0
+    }
+    os_disable_irq();
+    // 低电平起始位
+    iot_gpio_value_set(TEST_OUTPUT, 0);
+    iot_delay_cpu_cycle(g_cpu_cycle);
+    for (int i = 0;i < bit_num;i++) {
+        iot_gpio_value_set(TEST_OUTPUT, p&0x01);
+        iot_delay_cpu_cycle(g_cpu_cycle);
+        p >>= 1;
+    }
+    // 高电平停止位
+    iot_gpio_value_set(TEST_OUTPUT, 1);
+    iot_delay_cpu_cycle(g_cpu_cycle);
+
+    os_enable_irq();
+    return 0;
+}
+
+static int put_end() {
+    #if USE_HEAD_TAIL
+    iot_delay_cpu_cycle(g_cpu_cycle * 10);
+    #endif
+    // 低电平
+    iot_gpio_value_set(TEST_OUTPUT, 0);
+    iot_delay_cpu_cycle(g_cpu_cycle);
+    return 0;
+}
+
+
+static int puts_data(const uint8_t* data, int size) {
+    put_start();
+    for (int i = 0;i < size;i++) {
+        put_byte(data[i],VUART_EVEN);
+    }
+    put_end();
+    return size;
+}
+
+// 模拟电表回复表地址
+static const uint8_t g_data[] = {
+    0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0x68,0x21,0x00,0xc3,0x05,0x50,0x00,
+    0x00,0x00,0x00,0x00,0x00,0xd2,0xa9,0x85,0x01,0x02,0x40,0x01,0x02,0x00,0x01,
+    0x09,0x06,0x00,0x00,0x00,0x00,0x00,0x50,0x00,0x00,0x88,0xb0,0x16
+};
+
+void test_task_gpio(){
+    int r;
+    // g_cpu_cycle = g_cpu_freq / UART_BAUD_RATE;
+    g_cpu_cycle = 1027;
+    dprintf("test_task....\n");
+    gpio_func_set(TEST_OUTPUT, 0);
+
+    r = iot_gpio_open_as_output(TEST_OUTPUT);
+    r |= iot_gpio_set_pull_mode(TEST_OUTPUT, GPIO_PULL_UP);
+    if(r != 0)
+    {
+        dprintf("\ngpio config failed!\n");
+    }
+
+    for(;;) {
+        #if USE_HEAD_TAIL
+        dprintf("puts data with head and tail.\n");
+        #else
+        dprintf("puts data without head and tail.\n");
+        #endif
+        // puts_data((uint8_t *)"hello world.\n", 13);
+        // puts_data((uint8_t []){0xfe,0xfe,0xfe,0xfe,0xaa,0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80}, 13);
+        puts_data(g_data, 43);
+        os_delay(500);
+
+    }
+}
+
+void test_init()
+{
+    /* init common modules */
+    iot_bitops_init();
+
+    /* init os related modules and utilities */
+    os_utils_init();
+
+    /* init dbglog module */
+    iot_dbglog_init();
+
+    /* init pkt module */
+    iot_pkt_init(&test_pkt_config);
+
+    /* init ipc module */
+    //iot_ipc_init();
+
+    /*init uart module*/
+    iot_uart_init(1);
+
+    iot_share_task_init();
+
+    /* init gpio module */
+    iot_gpio_module_init();
+
+    test_task_gpio();
+}
+
+
+void iot_task_1(void *arg)
+{
+    dprintf("task 1 entry....\n");
+    test_init();
+
+    for(;;) {
+       os_delete_task(test_init_handle);
+       dprintf("task 1 running....\n");
+       os_delay(1000);
+    }
+
+}
+
+int32_t iot_task_init()
+{
+    /* start plc lib task */
+    test_init_handle = os_create_task(iot_task_1, NULL, 9);
+
+    //create the tasks;
+    if(test_init_handle != NULL) {
+        dprintf("task 1 init successfully...\n");
+    }
+
+    return 0;
+}
+
+int32_t iot_task_start()
+{
+    //start the tasks;
+    os_start_kernel();
+
+    return 0;
+}
+
+static void cache_init()
+{
+    cache_enable(AHB_CACHE_D0);
+    cache_set_buffer_mode(AHB_CACHE_D0, 1);
+    cache_enable(AHB_CACHE_D1);
+    cache_set_buffer_mode(AHB_CACHE_D1, 1);
+}
+
+static int32_t iot_platform_init()
+{
+    cache_init();
+    /*platform intialization*/
+    platform_init();
+
+    //resource initializations;
+    system_clock_init();
+
+    system_uart_init();
+
+    dbg_uart_init();
+
+    dbg_uart_stage1_init();
+
+    /* rtc init, idle used rtc lock */
+    iot_rtc_init();
+
+    return 0;
+}
+
+
+int32_t iot_module_init(void)
+{
+    //platform intialization;
+    // 在这里面重启的
+    iot_platform_init();
+
+    //create all the tasks;
+    iot_task_init();
+
+    dprintf("starting...\n");
+
+    return 0;
+}
+
+int32_t iot_module_start(void)
+{
+    int32_t res = 0;
+
+    res = iot_task_start();
+
+    return res;
+}
+#include "apb_dma.h"
+int main(void)
+{
+    //module init;
+    // 这个函数里产生了重启
+    iot_module_init();
+    iot_module_start();
+    return 0;
+}
+
+
+/*
+extern int uart_e_putc(int port, char c);
+int puts(const char* str, size_t len) {
+    if (len == 0) {
+        len = strlen(str);
+    }
+    for (int i = 0;i < len;i++) {
+        uart_e_putc(0,str[i]);
+    }
+    return len;
+}
+*/
\ No newline at end of file