https://support.dialog-semiconductor.com/resource-keywords/da14681-v18p-i2c 在 https://support.dialog-semiconductor.com/forums/post/dialog-smartbond-bluetooth-low-energy-42-%E2%80%93-hardware-device-reference-designs-dialog--10 < div class = "字段field-name-taxonomy-forums field-type-taxonomy-term-reference field-label-above”> < div class = "字段标签" >论坛:,< / div > < div class = "字段条目" > < div class =”field-item甚至“rel = " sioc: has_container " > < a href = " /论坛/ dialog-smartbond-bluetooth-low-energy - % E2 % 80% 93 -硬件-设备-引用-设计-对话框- % E2 % 80% 9 csmartbond”typeof="sioc:Container sioc:Forum" property="rdfs:label skos:prefLabel" datatype="">Dialog Smartbond Bluetooth Low Energy - Hardware (device &参考设计)/ /对话框“Smartbond”系列低功耗蓝牙——硬件(蓝牙芯片及参考设计)< / > < / div > < / div > < / div > < div class =”字段field-name-body field-type-text-with-summary field-label-hidden”> < div class = "字段条目" > < div class =”field-item甚至“财产=“内容:编码”> < p >嗨对话框中,< / p > < p >在基本板上开发代码时遇到如下问题:< br / >问题1。< br / >我是用演示中的pxp_repoter工程,下载到基本的开发板后。< br / >测量V18P的电压初始值为1.4 v,而且测量值会越来越小,最后趋近0 v。< br / >请问下这个V18P的电压输出值需要在软件上进行配置么?< / p > < p >问题2。我发现在基本的开发板上,只要IO口配置后< br / > hw_gpio_set_pin_function (CFG_GPIO_I2C1_SCL_PORT, CFG_GPIO_I2C1_SCL_PIN, HW_GPIO_MODE_OUTPUT HW_GPIO_FUNC_I2C_SCL); < br / > hw_gpio_set_pin_function (CFG_GPIO_I2C1_SDA_PORT, CFG_GPIO_I2C1_SDA_PIN, HW_GPIO_MODE_INPUT HW_GPIO_FUNC_I2C_SDA); < br / >直接测量悬空的sci sda的电压值都等于V33的值。< br / >这个现象可以理解成da14681的电压供电是VBAT (V33),所以IO口的状态高电平都是V33。< br / >所以不管外设工作电压是多少,IO口外部上拉到V18或者V18P,最后sci SDA的高电平都是V33。< br / >这个现象对系统是没有影响的?< / p > < p >非常期待大家的回复。< / p > < / div > < / div > < / div > < div class =”字段field-name-field-forum-keywords field-type-taxonomy-term-reference field-label-above”> < div class = "字段标签" >关键词:,< / div > < div class = "字段条目" > < div class =”field-item甚至“> < a href = " / resource-keywords / da14681-v18p-i2c”“=“skos:概念”属性=“rdfs: label skos: prefLabel”数据类型= " " > DA14681 V18P I2C < / > < / div > < / div > < / div > < div class =”字段field-name-field-device field-type-taxonomy-term-reference field-label-above”> < div class = "字段标签" >设备:,< / div > < div class = "字段条目" > < div class =”field-item甚至“> < a href = " / forum-post-device / da1468x”“=“skos:概念”属性=“rdfs: label skos: prefLabel”数据类型= " " > DA1468x < / > < / div > < / div > < / div > 2017年3月24日星期五01:50:00 +0000 index219 5719年https://support.dialog-semiconductor.com https://support.dialog-semiconductor.com/forums/post/dialog-smartbond-bluetooth-low-energy-42-%E2%80%93-hardware-device-reference-designs-dialog--10#comments