diff --git a/driver/src/hw3/gpio_mtx.c b/driver/src/hw3/gpio_mtx.c
index 59482c6..ccf68c0 100644
--- a/driver/src/hw3/gpio_mtx.c
+++ b/driver/src/hw3/gpio_mtx.c
@@ -97,7 +97,8 @@ void IRAM_ATTR gpio_pin_wpd(uint32_t pin, uint32_t val)
     PIN_RF_WRITE_REG(offset, tmp);
 }
 
-void gpio_pin_iinv(uint32_t pin, uint32_t val)
+// val 为1时启用输入反转
+void gpio_pin_iinv(uint32_t pin , uint32_t val)
 {
     uint32_t tmp;
     uint32_t offset;
@@ -108,6 +109,7 @@ void gpio_pin_iinv(uint32_t pin, uint32_t val)
     PIN_RF_WRITE_REG(offset, tmp);
 }
 
+// val 为1时启用输出反转
 void gpio_pin_oinv(uint32_t pin, uint32_t val)
 {
     uint32_t tmp;
@@ -119,7 +121,6 @@ void gpio_pin_oinv(uint32_t pin, uint32_t val)
     PIN_RF_WRITE_REG(offset, tmp);
 }
 
-static_printf_def(0x10001b9e)
 
 void gpio_pin_select(uint32_t pin , uint32_t func)
 {
@@ -131,7 +132,6 @@ void gpio_pin_select(uint32_t pin , uint32_t func)
     tmp = PIN_RF_READ_REG(offset);
     REG_FIELD_SET(GPIO_FUNC_SEL, tmp, func);
     PIN_RF_WRITE_REG(offset , tmp);
-    sbl_printf("gpio pin=%d , fun=%d\n" , pin , func);
 }
 
 uint8_t gpio_pin_get_select(uint32_t pin)