diff --git a/sdk/examples/coremark/core_portme.c b/sdk/examples/coremark/core_portme.c
index 74a0245..2f1cd7e 100644
--- a/sdk/examples/coremark/core_portme.c
+++ b/sdk/examples/coremark/core_portme.c
@@ -4,6 +4,7 @@
 #include "../../bsp/include/utils.h"
 #include "../../bsp/include/uart.h"
 #include "../../bsp/include/xprintf.h"
+#include "../../bsp/include/pinmux.h"
 
 #if VALIDATION_RUN
 	volatile ee_s32 seed1_volatile=0x3415;
@@ -54,5 +55,7 @@ secs_ret time_in_secs(CORE_TICKS ticks)
 
 void portable_init(core_portable *p, int *argc, char *argv[])
 {
+    pinmux_set_io0_func(IO0_UART0_TX);
+    pinmux_set_io3_func(IO3_UART0_RX);
     uart0_init(uart0_putc);
 }
diff --git a/sdk/examples/freertos/Demo/tinyriscv_GCC/main.c b/sdk/examples/freertos/Demo/tinyriscv_GCC/main.c
index c0f5545..ae5324e 100644
--- a/sdk/examples/freertos/Demo/tinyriscv_GCC/main.c
+++ b/sdk/examples/freertos/Demo/tinyriscv_GCC/main.c
@@ -107,7 +107,7 @@ int main( void )
 
 static void prvSetupHardware( void )
 {
-    gpio_set_mode(GPIO0, GPIO_MODE_OUTPUT);  // set gpio0 output mode
+    gpio_set_mode(GPIO7, GPIO_MODE_OUTPUT);  // set gpio7 output mode
 }
 /*-----------------------------------------------------------*/
 
@@ -180,7 +180,7 @@ const uint32_t ulNullLoopDelay = 0x1ffffUL;
 		{
 			__asm volatile( "nop" );
 		}
-		gpio_set_output_toggle(GPIO0); // toggle led
+		gpio_set_output_toggle(GPIO7); // toggle led
 	}
 }
 /*-----------------------------------------------------------*/
@@ -192,7 +192,7 @@ void vToggleLED( void )
     set_test_pass();
     while (1);
 #else
-    gpio_set_output_toggle(GPIO0); // toggle led
+    gpio_set_output_toggle(GPIO7); // toggle led
 #endif
 }
 
diff --git a/sdk/examples/i2c_slave/main.c b/sdk/examples/i2c_slave/main.c
index ed2548c..9d89525 100644
--- a/sdk/examples/i2c_slave/main.c
+++ b/sdk/examples/i2c_slave/main.c
@@ -5,6 +5,7 @@
 #include "../../bsp/include/xprintf.h"
 #include "../../bsp/include/utils.h"
 #include "../../bsp/include/rvic.h"
+#include "../../bsp/include/pinmux.h"
 
 
 #define SLAVE_ADDR   (0xAA)
@@ -19,6 +20,11 @@ static volatile op_e op;
 
 int main()
 {
+    pinmux_set_io0_func(IO0_UART0_TX);
+    pinmux_set_io3_func(IO3_UART0_RX);
+    pinmux_set_io6_func(IO6_I2C0_SCL);
+    pinmux_set_io8_func(IO8_I2C0_SDA);
+
     uart0_init(uart0_putc);
 
     i2c0_set_mode(I2C_MODE_SLAVE);
diff --git a/sdk/examples/int_preempt/main.c b/sdk/examples/int_preempt/main.c
index c7912cb..e01b027 100644
--- a/sdk/examples/int_preempt/main.c
+++ b/sdk/examples/int_preempt/main.c
@@ -6,6 +6,7 @@
 #include "../../bsp/include/gpio.h"
 #include "../../bsp/include/uart.h"
 #include "../../bsp/include/xprintf.h"
+#include "../../bsp/include/pinmux.h"
 
 static volatile uint32_t count;
 
@@ -13,6 +14,9 @@ int main()
 {
     count = 0;
 
+    pinmux_set_io0_func(IO0_UART0_TX);
+    pinmux_set_io3_func(IO3_UART0_RX);
+
     uart0_init(uart0_putc);
 
     timer0_set_div(25);
@@ -21,24 +25,28 @@ int main()
     timer0_set_int_enable(1);
     timer0_set_mode_ontshot();
     // timer0中断优先级为1
-    rvic_set_irq_prio_level(0, 1);
+    rvic_set_irq_prio_level(RVIC_INT_ID_0, 1);
     global_irq_enable();
-    rvic_irq_enable(0);
+    rvic_irq_enable(RVIC_INT_ID_0);
     timer0_start(1);
 
-    // gpio0输出模式
-    gpio_set_mode(GPIO0, GPIO_MODE_OUTPUT);
-    // gpio1输入模式
-    gpio_set_mode(GPIO1, GPIO_MODE_INPUT);
-    // gpio1双沿中断
-    gpio_set_interrupt_mode(GPIO1, GPIO_INTR_DOUBLE_EDGE);
-    rvic_irq_enable(3);
-    // gpio1中断优先级为2
-    rvic_set_irq_prio_level(3, 2);
+    // IO7用作GPIO7
+    pinmux_set_io7_func(IO7_GPIO7);
+    // IO9用作GPIO9
+    pinmux_set_io9_func(IO9_GPIO9);
+    // gpio7输出模式
+    gpio_set_mode(GPIO7, GPIO_MODE_OUTPUT);
+    // gpio9输入模式
+    gpio_set_mode(GPIO9, GPIO_MODE_INPUT);
+    // gpio9双沿中断
+    gpio_set_interrupt_mode(GPIO9, GPIO_INTR_DOUBLE_EDGE);
+    rvic_irq_enable(RVIC_INT_ID_9);
+    // gpio9中断优先级为2
+    rvic_set_irq_prio_level(RVIC_INT_ID_9, 2);
 
     while (1) {
         if (count == 3) {
-            gpio_set_output_toggle(GPIO0); // toggle led
+            gpio_set_output_toggle(GPIO7); // toggle led
             busy_wait(500 * 1000);
         }
     }
@@ -49,17 +57,19 @@ void timer0_irq_handler()
     timer0_clear_int_pending();
     rvic_clear_irq_pending(0);
 
-    xprintf("timer0 isr\n");
+    xprintf("timer0 isr enter\n");
     // GPIO0对应LED为灭
-    gpio_set_output_data(GPIO0, 1);
+    gpio_set_output_data(GPIO7, 1);
 
     while (count != 3);
+
+    xprintf("timer0 isr exit\n");
 }
 
-void gpio1_irq_handler()
+void gpio9_irq_handler()
 {
-    gpio_clear_intr_pending(GPIO1);
-    rvic_clear_irq_pending(3);
+    gpio_clear_intr_pending(GPIO9);
+    rvic_clear_irq_pending(RVIC_INT_ID_9);
 
     xprintf("gpio1 isr\n");
     count++;
diff --git a/sdk/examples/timer/main.c b/sdk/examples/timer/main.c
index 2415c50..ff67c30 100644
--- a/sdk/examples/timer/main.c
+++ b/sdk/examples/timer/main.c
@@ -4,6 +4,7 @@
 #include "../../bsp/include/utils.h"
 #include "../../bsp/include/rvic.h"
 #include "../../bsp/include/gpio.h"
+#include "../../bsp/include/pinmux.h"
 
 static volatile uint32_t count;
 
@@ -43,13 +44,15 @@ int main()
     rvic_irq_enable(0);
     timer0_start(1);
 
-    gpio_set_mode(GPIO0, GPIO_MODE_OUTPUT);
+    // IO7用作GPIO7
+    pinmux_set_io7_func(IO7_GPIO7);
+    gpio_set_mode(GPIO7, GPIO_MODE_OUTPUT);
 
     while (1) {
         // 500ms
         if (count == 50) {
             count = 0;
-            gpio_set_output_toggle(GPIO0); // toggle led
+            gpio_set_output_toggle(GPIO7); // toggle led
         }
     }
 #endif
diff --git a/sdk/examples/uart_int/main.c b/sdk/examples/uart_int/main.c
index a5cdde8..341bb00 100644
--- a/sdk/examples/uart_int/main.c
+++ b/sdk/examples/uart_int/main.c
@@ -4,6 +4,7 @@
 #include "../../bsp/include/xprintf.h"
 #include "../../bsp/include/rvic.h"
 #include "../../bsp/include/utils.h"
+#include "../../bsp/include/pinmux.h"
 
 
 #define UART_TXB	(80)
@@ -34,6 +35,9 @@ static void uart_putc(uint8_t c)
 
 int main()
 {
+    pinmux_set_io0_func(IO0_UART0_TX);
+    pinmux_set_io3_func(IO3_UART0_RX);
+
     uart0_init(uart_putc);
     rvic_irq_enable(1);
     rvic_set_irq_prio_level(1, 1);