diff --git a/lib/driver/dac161p997.c b/lib/driver/dac161p997.c
index 015b829..f018f47 100644
--- a/lib/driver/dac161p997.c
+++ b/lib/driver/dac161p997.c
@@ -1,8 +1,14 @@
 #include "dac161p997.h"
-#include "delay.h"
-
+#include "tims.h"
 static dac161p997_t _handle;
 
+static void delay_us(uint32_t us)
+{
+    RESET_TIM_COUNT(TIME_1US);
+    while (LL_TIM_GetCounter(TIME_1US) < us)
+        ; // 等待计数器达到指定值
+}
+
 static void dac161p997_output_0()
 {
     _handle.io->set(*_handle.io);
@@ -124,17 +130,8 @@ void dac161p997_swif_write_reg(uint16_t data, uint8_t tag)
  */
 void dac161p997_output_current(float32 current)
 {
-    uint8_t adc = (uint16_t)(current * DAC161P997_CURRENT_SLOPE) >> 8;
-    static uint8_t last_adc;
-    if (adc == last_adc)
-    {
-        last_adc = adc;
-        return;
-    }
-
-    dac161p997_swif_write_reg(DAC161P997_LCK_REG_UNLOCK, CONFIG_WRITE);
-    dac161p997_swif_write_reg(DAC161P997_ERR_LOW_REG + adc, CONFIG_WRITE);
-    dac161p997_swif_write_reg(DAC161P997_LCK_REG_LOCK, CONFIG_WRITE);
+    uint16_t adc = (uint16_t)(current * DAC161P997_CURRENT_SLOPE);
+    dac161p997_swif_write_reg(adc, DACCODE_WRITE);
 }
 
 /**
@@ -149,13 +146,9 @@ void dac161p997_output_current(float32 current)
  */
 void dac161p997_init()
 {
+    ENABLE_TIM_COUNT(TIME_1US);
     _handle.io = gpio_create(DAC161P997_IO_PORT, DAC161P997_IO_PIN);
-    dac161p997_swif_write_reg(DAC161P997_LCK_REG_UNLOCK, CONFIG_WRITE);
-    dac161p997_swif_write_reg(DAC161P997_CONFIG2_REG +
-                                  DAC161P997_CONFIG2_REG_LOOP +
-                                  DAC161P997_CONFIG2_REG_CHANNEL +
-                                  DAC161P997_CONFIG2_REG_PARITY +
-                                  DAC161P997_CONFIG2_REG_FRAME,
-                              CONFIG_WRITE);
-    dac161p997_swif_write_reg(DAC161P997_LCK_REG_LOCK, CONFIG_WRITE);
+    dac161p997_swif_write_reg(DAC161P997_LCK_REG + DAC161P997_LCK_REG_UNLOCK, CONFIG_WRITE);
+    dac161p997_swif_write_reg(DAC161P997_CONFIG2_REG, CONFIG_WRITE);
+    dac161p997_swif_write_reg(DAC161P997_LCK_REG + DAC161P997_LCK_REG_LOCK, CONFIG_WRITE);
 }
diff --git a/lib/driver/dac161p997.h b/lib/driver/dac161p997.h
index 5c53d0b..10500fc 100644
--- a/lib/driver/dac161p997.h
+++ b/lib/driver/dac161p997.h
@@ -2,7 +2,7 @@
 #define __DAC161P997_H__
 #include "main.h"
 #include "gpios.h"
-
+#define TIME_1US TIM1
 #define DAC161P997_IO_PORT (DAC161P997_GPIO_Port)
 #define DAC161P997_IO_PIN (DAC161P997_Pin)
 
@@ -60,15 +60,15 @@
 #define DACCODE_20mA (0xD555)
 #define DACCODE_24mA (0xFFFF)
 
-// cycles
-// #define QUARTER_CYCLES (625)
-// #define HALF_CYCLES (1250)
-// #define THREE_CYCLES (1875)
-// #define FULL_CYCLES (2500)
+typedef enum
+{
+    DAC161P997_IDLE_SYM,
 
+} dac161p997_e;
 typedef struct
 {
     gpio_t *io;
+    uint8_t count;
 } dac161p997_t;
 
 void dac161p997_output_0(void);
@@ -76,6 +76,7 @@ void dac161p997_output_1(void);
 void dac161p997_output_d(void);
 void dac161p997_output_symbol(uint8_t sym);
 void dac161p997_swif_write_reg(uint16_t data, uint8_t tag);
+
 extern void dac161p997_output_current(float32 current);
 extern void dac161p997_init(void);
 #endif