stm32f030c8芯片，用keil烧录报错，有dalao遇到过这些问题吗？

芯片是STM32f030c8t6，试过拉高boot0，拉低rst，都是这样，用的是PA14，PA13（swdio，swclk）。

JLink info:
------------
DLL: V5.12e, compiled Apr 29 2016 15:03:58
Firmware: J-Link ARM-OB STM32 compiled Aug 22 2012 19:52:04
Hardware: V7.00
S/N : 20090928
Feature(s) : RDI,FlashDL,FlashBP,JFlash,GDBFull

* JLink Info: STM32 (connect): Can not attach to CPU. Trying connect under reset.
***JLink Error: STM32: Connecting to CPU via connect under reset failed.
* JLink Info: STM32 (connect): Can not attach to CPU. Trying connect under reset.
***JLink Error: STM32: Connecting to CPU via connect under reset failed.
Error: Flash Download failed  -  Target DLL has been cancelled