diff --git a/bsp/renesas/libraries/HAL_Drivers/drv_usart_v2.c b/bsp/renesas/libraries/HAL_Drivers/drv_usart_v2.c
index dca1535d32..8069b6293a 100644
--- a/bsp/renesas/libraries/HAL_Drivers/drv_usart_v2.c
+++ b/bsp/renesas/libraries/HAL_Drivers/drv_usart_v2.c
@@ -236,6 +236,22 @@ static int ra_uart_getc(struct rt_serial_device *serial)
     return RT_EOK;
 }
 
+static rt_size_t ra_uart_transmit(struct rt_serial_device     *serial,
+                                  rt_uint8_t           *buf,
+                                  rt_size_t             size,
+                                  rt_uint32_t           tx_flag)
+{
+    struct ra_uart *uart;
+
+    RT_ASSERT(serial != RT_NULL);
+    RT_ASSERT(buf != RT_NULL);
+    uart = rt_container_of(serial, struct ra_uart, serial);
+
+    ra_uart_control(serial, RT_DEVICE_CTRL_SET_INT, (void *)tx_flag);
+
+    return size;
+}
+
 #ifdef BSP_USING_UART0
 void user_uart0_callback(uart_callback_args_t *p_args)
 {
@@ -472,6 +488,7 @@ static const struct rt_uart_ops ra_uart_ops =
     .control = ra_uart_control,
     .putc = ra_uart_putc,
     .getc = ra_uart_getc,
+    .transmit = ra_uart_transmit
 };
 
 
diff --git a/bsp/renesas/ra2l1-cpk/README.md b/bsp/renesas/ra2l1-cpk/README.md
index 9f158550a3..463811b840 100644
--- a/bsp/renesas/ra2l1-cpk/README.md
+++ b/bsp/renesas/ra2l1-cpk/README.md
@@ -53,7 +53,7 @@ CPK-RA2L1 评估板可通过灵活配置软件包和 IDE，可帮助用户对[RA
 
 > 注意：此工程需要使用 J-Flash Lite 工具烧录程序。建议使用 V7.50 及以上版本烧录工程。[J-Link 下载链接](https://www.segger.com/downloads/jlink/)
 
-- 下载：打开 J-Flash lite 工具，选择芯片型号 R7FA6M4AF，点击 OK 进入工具。选择 BSP 目录下 MDK 编译出的 /object/ra6m4.hex 文件，点击 Program Device 按钮开始烧录。具体操作过程可参考下图步骤：
+- 下载：打开 J-Flash lite 工具，选择芯片型号 R7FA2L1AB，点击 OK 进入工具。选择 BSP 目录下 MDK 编译出的 /object/ra6m4.hex 文件，点击 Program Device 按钮开始烧录。具体操作过程可参考下图步骤：
 
 ![image-20211011182434519](docs/picture/jflash.png)