diff --git a/sdk/bsp/include/utils.h b/sdk/bsp/include/utils.h
index de07e32..3dd27db 100644
--- a/sdk/bsp/include/utils.h
+++ b/sdk/bsp/include/utils.h
@@ -1,8 +1,8 @@
 #ifndef _UTILS_H_
 #define _UTILS_H_
 
-#define CPU_FREQ_HZ   (25000000)  // 25MHz
-#define CPU_FREQ_MHZ  (25)        // 25MHz
+#define CPU_FREQ_HZ   (12000000)  // 12MHz
+#define CPU_FREQ_MHZ  (12)        // 12MHz
 
 
 #define read_csr(reg) ({ unsigned long __tmp; \
diff --git a/sdk/bsp/lib/uart.c b/sdk/bsp/lib/uart.c
index 328824d..4a6f468 100644
--- a/sdk/bsp/lib/uart.c
+++ b/sdk/bsp/lib/uart.c
@@ -1,5 +1,6 @@
 #include <stdint.h>
 
+#include "../include/utils.h"
 #include "../include/uart.h"
 #include "../include/xprintf.h"
 
@@ -57,7 +58,7 @@ void uart_init(uint32_t base, myputc put)
 {
     // enable tx and rx
     UART_REG(base, UART_CTRL_REG_OFFSET) |= (1 << UART_CTRL_TX_EN_BIT) | (1 << UART_CTRL_RX_EN_BIT);
-
+    uart_set_baud_div(base, CPU_FREQ_HZ / 115200);
     xdev_out(put);
 }