How to use the JTAG Port as GPIO

3 posts / 0 new

Last post

Sun, 2016-09-18 06:21

#1

jiangnanzhl

Offline

Last seen:4 years 3 months ago

加入:2016-05-20 10:24

How to use the JTAG Port as GPIO

As stated in data sheet，The P1_4 is the JTAG clock （SWCLK）by default，and the P1_5 is the JTAG data I/O （SWDIO） by default。
They Can also be used as GPIO pins。
How to use the JTAG Port as GPIO？

By the way，Can I use those Pins （SWCLK and SWDIO） as UART_TX and UART_Rx？

Device:

DA14580

Mon, 2016-09-19 16:55

#2

MT_dialog

Offline

Last seen:2 months 2 weeks ago

加入:2015-06-08 11:34

Hi jiangnanzhl,

Hi jiangnanzhl,

是的,你可以使用它们GPIO的时候the SYS_CTRL_REG[DEBUGGER_ENABLE] bit is not set. Just configure them as you would do with other GPIOs in the periph_init() and you will be able to use them.

Thanks MT_dialog

Tue, 2016-09-20 08:22

(Reply to #2) #3

jiangnanzhl

Offline

Last seen:4 years 3 months ago

加入:2016-05-20 10:24

OK， thanks

OK， thanks