ARTERY AT32-Comm-EV User manual

AT32-Comm-EV User Manual
2022.5.7 1Rev 1.00
AT32-Comm-EV evaluation board
Introduction
The AT32-Comm-EV evaluation board is designed to help users speed up the development of
communication application solutions. It features CAN and RS-485 transceivers, I2C and SPI
connectors. The board can be connected to Artery’s AT-START board or other compatible control
boards through standard ArduinoTM Uno R3 connectors.

AT32-Comm-EV User Manual
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Contents
1Hardware layout and configuration ..................................................................... 5
2Arduino connectors............................................................................................... 7
3How to use AT32-Comm-EV.................................................................................. 9
4Schematics ........................................................................................................... 10
5Revision history................................................................................................... 13

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List of tables
Table 1. ArduinoTM Uno R3 connectors definition................................................................................7
Table 2. Document revision history....................................................................................................13

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List of figures
Figure 1. Top layer layout ....................................................................................................................5
Figure 2. Bottom layer layout...............................................................................................................6
Figure 3. Schematic diagram (power supply, I2C and SPI) ...............................................................10
Figure 4. Schematic diagram (RS-485 and CAN) ............................................................................. 11
Figure 5. Schematic diagram (Arduino UNO R3 extension connectors) ..........................................12

AT32-Comm-EV User Manual
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1 Hardware layout and configuration
The AT32-Comm-EV board is connected to the AT-START board through ArduinoTM connectors. In
this way, the EV board is able to access the CAN, USART, I2C and SPI on embedded AT32 MCU
on AT-START board. This document uses AT-START-F403A board as an example to demonstrate
various functions.
In addition to the embedded AT32 MCU, the AT-START board offers standard ArduinoTM Uno R3
extension connectors to be connected to the AT32-Comm-EV board.
JP1 and JP2 are used to configure whether to turn on 120 Ω termination resistors of the CAN and
RS-485 transceivers, respectively. They are ON by default. The users are allowed to adjust the
resistors according to their needs.
Figure 1and Figure 2 show these features on the AT32-Comm-EV board.
Figure 1. Top layer layout
SPI
connector
RS-485
transceiver
CAN
transceiver
I2C
connector
CAN
connector
RS-485
connector

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Figure 2. Bottom layer layout

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2 Arduino connectors
Table 1. ArduinoTM Uno R3 connectors definition
Connector
Pin
No.
号
Arduino
pin name
AT32F403A
pin name
Function
Description
J4
(power
supply)
1
NC
-
-
-
2
IOREF
-
3.3 V reference voltage
3.3 V reference voltage
3
RESET
NRST
External reset
-
4
3.3V
-
3.3 V input/output
3.3 V power supply
5
5V
-
5 V input/output
5 V power supply
6
GND
-
Ground
Ground
7
GND
-
Ground
Ground
8
VIN
-
7~12 V input/output
-
J5
(analog
input)
1
A0
PA0
ADC123_IN0
-
2
A1
PA1
ADC123_IN1
USART2_RTS_DE or GPIO
3
A2
PA4
ADC12_IN4
-
4
A3
PB0
ADC12_IN8
-
5
A4
PC1 or PB9
ADC123_IN11 or
I2C1_SDA
-
6
A5
PC0 or PB8
ADC123_IN10 or
I2C1_SCL
-
J2
(logic
input/output
low bytes)
1
D0
PA3
USART2_RX
USART2_RX
2
D1
PA2
USART2_TX
USART2_TX
3
D2
PA10
-
-
4
D3
PB3
TMR2_CH2
-
5
D4
PB5
-
-
6
D5
PB4
TMR3_CH1
-
7
D6
PB10
TMR2_CH3
I2C2_SCL
8
D7
PA8
-
-
J1
(logic
input/output
high bytes)
1
D8
PA9
-
-
2
D9
PC7
TMR3_CH2
-
3
D10
PA15 or PB6
SPI1_NSS or TMR4_CH1
-
4
D11
PA7
TMR3_CH2 or SPI1_MOSI
-
5
D12
PA6
SPI1_MISO
-
6
D13
PA5
SPI1_SCK
-
7
GND
-
Ground
Ground
8
AREF
-
VREF+ input/output
-
9
SDA
PB9
I2C1_SDA
CAN1_TX
10
SCL
PB8
I2C1_SCL
CAN1_RX

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Connector
Pin
No.
号
Arduino
pin name
AT32F403A
pin name
Function
Description
J3
(others)
2
MISO
PB14
SPI2_MISO
SPI2_MISO
1
5V
-
5 V input/output
5 V power supply
4
SCK
PB13
SPI2_SCK
SPI2_SCK
3
MOSI
PB15
SPI2_MOSI
SPI2_MOSI
6
RESET
NRST
External reset
-
5
GND
-
Ground
-
8
CS
PB12
SPI2_CS
SPI2_CS
7
PB11
PB11
-
I2C2_SDA

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3 How to use AT32-Comm-EV
Insert the AT32-Comm-EV board into the Arduino connectors on AT-START board so that two
parts are connected together. After successful connection, supply 5 V and 3.3 V for the combined
board according to the descriptions of Power supply section of the AT-START user manual. Then it
is ready to use the AT32-Comm-EV board, in which the CN1 is used to connect to SPI device, the
CN2 to I2C device, CN3 to RS-485, and CN4 to CAN.
Example codes regarding AT32-Comm-EV board can be found in BSP, including:
CAN example code:
AT32xxx_Firmware_Library_V2.x.x\project\at_start_xxx\examples\can\communication_mode；
RS-485 example code:
AT32xxx_Firmware_Library_V2.x.x\project\at_start_xxx\examples\usart\rs485；
I2C example code:
AT32xxx_Firmware_Library_V2.x.x\project\at_start_xxx\examples\i2c\eeprom；
SPI example code:
AT32xxx_Firmware_Library_V2.x.x\project\at_start_xxx\examples\spi\w25q_flash。

A A
B B
C C
D D
1
1
2
2
3
3
4
4
5
5
Title:
Power & I2C& SPI REV: 1.0
Date: 2022-05-07
Sheet: 1
Drawn By:
Company: Artery Technology
100R
R12
100R
R13
1.8K
R10
1.8K
R11
PB14
PB13
NRST
PB12
PB15
PB11
Reset
To Device
PB10
+3V3
100RR7
100RR5
100RR9
100RR6
100RR8
+5V
GND
GND
E3.3V+3V3
GND EGND
0RR1
EGND EGND EGND EGND EGND
EGND EGND
4.7uF
C5 4.7uF
C4
0.1uF
C2
0.1uF
C3
0.1uF
C6
E3.3V
PB12/SPI2_NSS
PB14/USART3_RTS/SPI2_MISO
PB15/SPI2_MOSI
PB13/USART3_CTS/SPI2_SCK
PB11/USART3_RX/I2C2_SDA
PB10/USART3_TX/I2C2_SCL
SPI
Header 4
CN2
1
1
2
2
3
3
4
4
SMBJ3.3A
D2
EGND
GND
1K
R3
Green
LED1
GND
GND
4.7uF
C1
SMD0603B050TF
F1
E3.3V
EGND
Header 7
CN1
1
1
2
2
3
3
4
4
5
5
6
6
7
7
ME6211C33M5G-N
U1
VIN
1
VSS
2
CE
3NC 4
VOUT 5
ESD5341N-2/TR
D3 D4 D5 D6 D7
D9
ESD5341N-2/TR
D8
SD
I2C
I2C
AT32-Comm-EV User Manual
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4 Schematics
Figure 3. Schematic diagram (power supply, I2C and SPI)