diff --git a/rt-thread-version/rt-thread-standard/programming-manual/device/dac/dac.md b/rt-thread-version/rt-thread-standard/programming-manual/device/dac/dac.md
index 74b37443b71e7373e50f74d824054d7887224594..fc291986bb9ef0d250adeb1487d112e89da00efe 100644
--- a/rt-thread-version/rt-thread-standard/programming-manual/device/dac/dac.md
+++ b/rt-thread-version/rt-thread-standard/programming-manual/device/dac/dac.md
@@ -122,7 +122,7 @@ dac_dev = (rt_dac_device_t)rt_device_find(DAC_DEV_NAME);
 /* 使能设备 */
 rt_dac_enable(dac_dev, DAC_DEV_CHANNEL);
 /* 输出电压值 */
-rt_dac_write(dac_dev, DAC_DEV_CHANNEL, &value);
+rt_dac_write(dac_dev, DAC_DEV_CHANNEL, value);
 /* 转换为对应电压值 */
 vol = value * REFER_VOLTAGE / CONVERT_BITS;
 rt_kprintf("the voltage is :%d.%02d \n", vol / 100, vol % 100);
@@ -157,7 +157,7 @@ dac_dev = (rt_dac_device_t)rt_device_find(DAC_DEV_NAME);
 /* 使能设备 */
 rt_dac_enable(dac_dev, DAC_DEV_CHANNEL);
 /* 设置输出值 */
-rt_dac_write(dac_dev, DAC_DEV_CHANNEL， &value);
+rt_dac_write(dac_dev, DAC_DEV_CHANNEL， value);
 /* 转换为对应电压值 */
 vol = value * REFER_VOLTAGE / CONVERT_BITS;
 rt_kprintf("the voltage is :%d.%02d \n", vol / 100, vol % 100);