diff --git a/lark1fq/src/adc.c b/lark1fq/src/adc.c
index ba6f479..d60acf0 100755
--- a/lark1fq/src/adc.c
+++ b/lark1fq/src/adc.c
@@ -175,7 +175,7 @@ void adc_loop(void)
         val = adc_det_temp_from_ltc1867;
     }
 #endif
-    debug_write_data(20 + ch, (float)val);
+    debug_write_data(DEBUG_CH_ADC_RAW + ch, (float)val);
     adc_input_data(ch, val); /* input data from ADC to sort buffer */
     if (ch == 0) {
         val = adc_get_filter_data(ch);
@@ -184,19 +184,19 @@ void adc_loop(void)
 #else
         value = adc_rtot(val);
 #endif
-        debug_write_data(24 + ch, (float)value);
+        debug_write_data(DEBUG_CH_ADC_FILTER + ch, (float)value);
         device_data.detector_temperature = value;
         ch = 1;
     } else if (ch == 1) {
         val = adc_get_filter_data(ch);
         value = adc_rtot(val);
-        debug_write_data(24 + ch, (float)value);
+        debug_write_data(DEBUG_CH_ADC_FILTER + ch, (float)value);
         device_data.lamp_temperature = value;
         ch = 3;
     } else if (ch == 3) {
         val = adc_get_filter_data(ch);
         value = (uint32_t)val * 6600 / 4096;
-        debug_write_data(24 + ch, (float)value);
+        debug_write_data(DEBUG_CH_ADC_FILTER + ch, (float)value);
         device_data.lamp_voltage = value;
         ch = 0;
     } else {
diff --git a/lark1fq/src/debug.h b/lark1fq/src/debug.h
index bc80fa9..61504b2 100755
--- a/lark1fq/src/debug.h
+++ b/lark1fq/src/debug.h
@@ -13,7 +13,14 @@
 #define DEBUG_UART_PIN      (GPIO_Pin_6)
 #define DEBUG_UART_BAUDRATE (2 * 1000 * 1000)
 
-#define DEBUG_CHAN_MAX (28)
+#define DEBUG_CH_RAW        (0 * 4)
+#define DEBUG_CH_SUM_1      (1 * 4)
+#define DEBUG_CH_SUM_2      (2 * 4)
+#define DEBUG_CH_MEDIAN     (3 * 4)
+#define DEBUG_CH_WINDOW     (4 * 4)
+#define DEBUG_CH_ADC_RAW    (5 * 4)
+#define DEBUG_CH_ADC_FILTER (6 * 4)
+#define DEBUG_CHAN_MAX      (7 * 4)
 
 struct debug_data_s {
     uint8_t enable;
diff --git a/lark1fq/src/filter.c b/lark1fq/src/filter.c
index fa55db1..42e9eff 100755
--- a/lark1fq/src/filter.c
+++ b/lark1fq/src/filter.c
@@ -105,12 +105,12 @@ void filter_sum_process(void)
         idx = data_filter[i].sum_idx;
         sum = data_filter[i].sum_sum;
         val = data_filter[i].input;
-        debug_write_data(4 + i, (float)val);
+        debug_write_data(DEBUG_CH_SUM_1 + i, (float)val);
         sum = sum - data_filter[i].sum_buff[idx];
         data_filter[i].sum_buff[idx] = val;
         sum = sum + val;
         data_filter[i].sum_sum = sum;
-        debug_write_data(8 + i, (float)(data_filter[i].sum_sum));
+        debug_write_data(DEBUG_CH_SUM_2 + i, (float)(data_filter[i].sum_sum));
         data_filter[i].sum_idx++;
         if (data_filter[i].sum_idx >= data_filter[i].sum_len) {
             data_filter[i].sum_idx = 0;
@@ -155,7 +155,7 @@ void filter_median_process(void)
         }
         /* calc median data */
         data_filter[i].median_output = (iter->data + iter->next->data) / 2;
-        debug_write_data(12 + i, (float)(data_filter[i].median_output));
+        debug_write_data(DEBUG_CH_MEDIAN + i, (float)(data_filter[i].median_output));
         /* iterate median_idx */
         data_filter[i].median_idx++;
         if (data_filter[i].median_idx >= data_filter[i].median_len) {
@@ -178,7 +178,7 @@ void filter_window_process(void)
         sum = sum + val;
         data_filter[i].window_sum = sum;
         data_filter[i].window_output = sum / data_filter[i].window_len;
-        debug_write_data(16 + i, (float)(data_filter[i].window_output));
+        debug_write_data(DEBUG_CH_WINDOW + i, (float)(data_filter[i].window_output));
         data_filter[i].window_idx++;
         if (data_filter[i].window_idx >= data_filter[i].window_len) {
             data_filter[i].window_idx = 0;
diff --git a/lark1fq/src/ltc1867.c b/lark1fq/src/ltc1867.c
index be9455c..aad2c42 100755
--- a/lark1fq/src/ltc1867.c
+++ b/lark1fq/src/ltc1867.c
@@ -198,7 +198,7 @@ void TIM2_IRQHandler(void)
     /* split 2 for loop, because sample timing is strict, only place important code in sample duration */
     for (uint8_t i = 0; i < 4; i++) {
         data_ltc1867.sum[i] += diff32768(val[i]); /* add every channel original data for next process */
-        debug_write_data(i, (float)val[i]); /* channel 0~3 for ltc1867 original sample data */
+        debug_write_data(DEBUG_CH_RAW + i, (float)val[i]); /* channel 0~3 for ltc1867 original sample data */
     }
     adc_det_temp_from_ltc1867 = val[4]; /* channel 4 for ltc1867 detector temperature sample data */
     data_ltc1867.val_idx++;