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We designed a PCB with stm32f030c8t6. We soldered the PCB and tried to upload the code. Power has gone to the stm32f030c8t6 successfully but when we arranged a pin as a gpio output it wasn't high.
thank you for those links. we are uploading code with st-link. we are using stm32f030c8t6 as a microcontroller on our board which we designed. the problem is we are seeing the microcontroller but we can't upload the code. there are no connection errors.
Keil created this related video tutorial "Benefits of ST-Link when using with Arm Keil MDK": http://www2.keil.com/video
As you see to your target there are many Infos existing at Keil. Another one is our "Application Note 286":
https://www.keil.com/appnotes/docs/apnt_286.asp
I hope with all these links you manage to approach a solution, good luck!