PA14 pin on TSSOP14 package acts as an output pin when the embedded bootloader is active (SPI1_MISO). On empty
devices (devices from factory), the bootloader is active due to the empty check mechanism (refer to RM0377 reference
manual). PA14 pin also acts as SWCLK. When programming devices in TSSOP14 for the first time, it is necessary to use the
"connect under reset" method and the SWD interface to disable the bootloader by driving this PA14/SWCLK pin.
and the SWD interface to disable the bootloader by driving this PA14/SWCLK pin.
怎么处理?
devices (devices from factory), the bootloader is active due to the empty check mechanism (refer to RM0377 reference
manual). PA14 pin also acts as SWCLK. When programming devices in TSSOP14 for the first time, it is necessary to use the
"connect under reset" method and the SWD interface to disable the bootloader by driving this PA14/SWCLK pin.
and the SWD interface to disable the bootloader by driving this PA14/SWCLK pin.
怎么处理?
st-link utility
其次检查SWD连接关系,不要影响通讯。 再次 看芯片是否进入低功耗(某些情况)。 一般用楼上建议的utility的烧录工具测试连接比较方便
试:拉低RESET脚--->连接SWD仿真器--->连接成功后,释放RESET脚---->编程。
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