ARTERY AT32F403A Series, Application Note, Page: 9 / 26

AT32 Printf Debug Demo
2019.08.05 9 Rev 1.0.2
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2.2 Redirect Printf as serial ports in IAR
2.2.1 Introduction
Redirect the Printf function to a set of actual serial ports in the chip, and output via TX pin and
finally implement information interaction through the serial port debugging assistant.
2.2.2 Example code
002_Printf_Test_IAR_USART2\USER
2.2.3 Environment and hardware
2.2.3.1 Development environment
This method is used in the IAR environment. The compiling environment used in the example code
is IAR_V6/7/8 with the hardware board AT-START-F403_V1.2.
2.2.3.2 Hardware connection
2.2.3.2.1 J-Link/AT-Link&... connection
J-Link/AT-Link&... connection
Table 3. Hardware connection table -- (without JTDO)
Hardware connection table --(without JTDO)
No. AT-START-F403_V1.2 J-Link/AT-
Link&…
Attention
1 3.3V 3.3V None
2 PA13 SWDIO Must Pull up external
3 PA14 SWCLK Must Pull down external
4 NRST RSTn None
5 GND GND None
2.2.3.2.2 USART2 connection
Table 4. H
ardware connection table
--(USART)
hardware connection table --(USART)
序号
AT-START-F403_V1.2 USB_To_TTL(CH340) Attention
1 GND GMD None
2 PA2 RXD None
3 PA3 TXD None