GigaDevice Semiconductor GD32150R-EVAL User manual

GigaDevice Semiconductor Inc.
GD32150R-EVAL
User Guide
V3.1
(Dec.31.2021)

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Table of Contents
Table of Contents ................................................................................................................................. 1
List of Figures....................................................................................................................................... 4
List of Tables......................................................................................................................................... 5
1. Summary........................................................................................................................................ 6
2. Function Pin Assign ..................................................................................................................... 6
3. Getting started............................................................................................................................... 7
4. Hardware layout overview............................................................................................................ 8
4.1. Power supply.......................................................................................................................... 8
4.2. Boot option............................................................................................................................. 8
4.3. LED.......................................................................................................................................... 9
4.4. KEY.......................................................................................................................................... 9
4.5. USART................................................................................................................................... 10
4.6. RS485.................................................................................................................................... 10
4.7. ADC/DAC .............................................................................................................................. 10
4.8. I2S...........................................................................................................................................11
4.9. I2C...........................................................................................................................................11
4.10. SPI-TF CARD..................................................................................................................... 12
4.11. SPI-TFT LCD ..................................................................................................................... 12
4.12. USB.................................................................................................................................... 13
4.13. CMP.................................................................................................................................... 13
4.14. HDMI-CEC ......................................................................................................................... 13
4.15. TSI...................................................................................................................................... 14
4.16. IFRP ................................................................................................................................... 14
4.17. RTC.................................................................................................................................... 15
4.18. GD-Link ............................................................................................................................. 15
4.19. BEEPER............................................................................................................................. 16
4.20. Extension.......................................................................................................................... 16
4.21. MCU ................................................................................................................................... 17
5. Routine use guide....................................................................................................................... 17

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5.1. GPIO_Running_LED............................................................................................................ 17
5.1.1. DEMO purpose............................................................................................................... 17
5.1.2. DEMO running result...................................................................................................... 17
5.2. GPIO_Key_Polling_mode ................................................................................................... 18
5.2.1. DEMO purpose............................................................................................................... 18
5.2.2. DEMO running result...................................................................................................... 18
5.3. EXTI_Key_Interrupt_mode.................................................................................................. 18
5.3.1. DEMO purpose............................................................................................................... 18
5.3.2. DEMO running result...................................................................................................... 18
5.4. GPIO_BEEPER..................................................................................................................... 19
5.4.1. DEMO purpose............................................................................................................... 19
5.4.2. DEMO running result...................................................................................................... 19
5.5. USART_Printf....................................................................................................................... 19
5.5.1. DEMO purpose............................................................................................................... 19
5.5.2. DEMO running result...................................................................................................... 19
5.6. USART_HyperTerminal_Interrupt ...................................................................................... 20
5.6.1. DEMO purpose............................................................................................................... 20
5.6.2. DEMO running result...................................................................................................... 20
5.7. USART_DMA ........................................................................................................................ 20
5.7.1. DEMO purpose............................................................................................................... 20
5.7.2. DEMO running result...................................................................................................... 20
5.8. RS485_Test........................................................................................................................... 21
5.8.1. DEMO purpose............................................................................................................... 21
5.8.2. DEMO running result...................................................................................................... 21
5.9. ADC_Conversion_Triggered_By_Timer............................................................................ 22
5.9.1. DEMO purpose............................................................................................................... 22
5.9.2. DEMO running result...................................................................................................... 23
5.10. DAC_Output_Voltage_Value ........................................................................................... 23
5.10.1. DEMO purpose........................................................................................................... 23
5.10.2. DEMO running result.................................................................................................. 23
5.11. Comparator_Obtain_Brightness .................................................................................... 23
5.11.1. DEMO purpose............................................................................................................... 23
5.11.2. DEMO running result...................................................................................................... 23
5.12. I2C_EEPROM.................................................................................................................... 24
5.12.1. DEMO purpose........................................................................................................... 24
5.12.2. DEMO running result.................................................................................................. 24
5.13. SPI_TFT_LCD_Driver....................................................................................................... 25
5.13.1. DEMO purpose........................................................................................................... 25
5.13.2. DEMO running result.................................................................................................. 25

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5.14. SPI_TF_Card_Block_Operation...................................................................................... 26
5.14.1. DEMO purpose........................................................................................................... 26
5.14.2. DEMO running result.................................................................................................. 26
5.15. SPI_TF_Card_FATFS_Operation .................................................................................... 27
5.15.1. DEMO purpose........................................................................................................... 27
5.15.2. DEMO running result.................................................................................................. 27
5.16. HDMI-CEC_HostSlaveCommunication.......................................................................... 28
5.16.1. DEMO purpose........................................................................................................... 28
5.16.2. DEMO running result.................................................................................................. 28
5.17. I2S_Audio_Player............................................................................................................. 29
5.17.1. DEMO purpose........................................................................................................... 29
5.17.2. DEMO running result.................................................................................................. 29
5.18. RCU_Clock_Out ............................................................................................................... 29
5.18.1. DEMO purpose........................................................................................................... 29
5.18.2. DEMO running result.................................................................................................. 29
5.19. PMU_sleep_wakeup......................................................................................................... 30
5.19.1. DEMO purpose........................................................................................................... 30
5.19.2. DEMO running result.................................................................................................. 30
5.20. RTC_Calendar .................................................................................................................. 30
5.20.1. DEMO purpose........................................................................................................... 30
5.20.2. DEMO running result.................................................................................................. 30
5.21. IRInfrared_Transceiver.................................................................................................... 31
5.21.1. DEMO purpose........................................................................................................... 31
5.21.2. DEMO running result.................................................................................................. 31
5.22. TIMER_Breath_LED ......................................................................................................... 31
5.22.1. DEMO purpose........................................................................................................... 31
5.22.2. DEMO running result.................................................................................................. 31
5.23. TSI_TouchKey_leds......................................................................................................... 31
5.23.1. DEMO purpose........................................................................................................... 31
5.23.2. DEMO running result.................................................................................................. 32
5.24. USB_Device...................................................................................................................... 32
5.24.1. DEMO purpose........................................................................................................... 32
5.24.2. DEMO running result.................................................................................................. 32
6. Revision history.......................................................................................................................... 33

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List of Figures
Figure 4-1 Schematic diagram of power supply................................................................................................8
Figure 4-2 Schematic diagram of boot option....................................................................................................8
Figure 4-3 Schematic diagram of LED function.................................................................................................9
Figure 4-4 Schematic diagram of Key function .................................................................................................9
Figure 4-5 Schematic diagram of USART function.........................................................................................10
Figure 4-6 Schematic diagram of RS485 function ..........................................................................................10
Figure 4-7 Schematic diagram of ADC/DAC function ....................................................................................10
Figure 4-8 Schematic diagram of I2S function.................................................................................................11
Figure 4-9 Schematic diagram of I2C function ................................................................................................11
Figure 4-10 Schematic diagram of SPI-TF CARD function ...........................................................................12
Figure 4-11 Schematic diagram of SPI-TFT LCD function ............................................................................12
Figure 4-12 Schematic diagram of USB function............................................................................................13
Figure 4-13 Schematic diagram of CMP function............................................................................................13
Figure 4-14 Schematic diagram of HDMI-CEC function.................................................................................13
Figure 4-15 Schematic diagram of TSI function ..............................................................................................14
Figure 4-16 Schematic diagram of IFRP function ...........................................................................................14
Figure 4-17 Schematic diagram of RTC function ............................................................................................15
Figure 4-18 Schematic diagram of GD-Link function.....................................................................................15
Figure 4-19 Schematic diagram of BEEPER function....................................................................................16
Figure 4-20 Schematic diagram of Extension Pin...........................................................................................16
Figure 4-21 Schematic diagram of MCU Pin.....................................................................................................17

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List of Tables
Table 2-1 Pin assignment ........................................................................................................................................6
Table 4-1 Boot configuration..................................................................................................................................8
Table 6-1 Revision history.....................................................................................................................................33

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1. Summary
GD32150R-EVAL-V1.3 evaluation board uses GD32F150RBT6 as the main controller. As a
complete development platform of GD32F1x0 powered by ARM® Cortex™-M3 core, the
board supports full range of peripherals. It uses mini-USB interface or AC/DC adapter to
supply 3.3V power. SWD, Reset, Boot, User button key, LED, I2C, I2S, USART, RS485,
TFT-LCD, HDMI-CEC, LDR, TSI, IFRP LED, IR Receiver, RTC, SPI, USB, ADC, DAC and
Extension Pin are also included. This document details its hardware schematic and the
relevant applications.
2. Function Pin Assign
Table 2-1 Pin assignment
Function
Pin
Description
LED
PC10
LED1
PC11
LED2
PC12
LED3
PD2
LED4
RESET
-
K1-Reset
KEY
PA0
K2-Wakeup
PF7
K3-User Key
PC13
K4-Temper
BEEPER
PC7
BEEPER_CTL
USB
PA11
USBDM
PA12
USBDP
PC2
USBDP pull up pin
IR
PC6
IR_RX
PB9
IR_TX
I2C
PB6
I2C0_SCL
PB7
I2C0_SDA
I2S
PA4
I2S_WS
PA5
I2S_CK
PA7
I2S_DIN
PA15
MSEL
PB3
MCLK
PB5
MDIN
PA6
I2S_MCK
USART0
PA9
USART0_TX
PA10
USART0_RX
RS485
PA2
RS485_TX
PA3
RS485_RX
PA1
RS485_DIR

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Function
Pin
Description
TSI
PB11
TSI_G5_IO0
PB12
TSI_G5_IO1
PB13
TSI_G2_IO2
PB14
TSI_G5_IO3
PC5
TSI_G2_IO0
PB0
TSI_G2_IO1
SPI
PB3
SPI0_SCK
PB4
SPI0_MISO
PB5
SPI0_MOSI
PF5
TFT_CS
PF4
TF_CARD_CS
PC4
TFT_RESET
ADC
PC1
ADC_IN11
HDMI-CEC
PB8
CEC
COMPARATOR
PA1
COMP0_IP
DAC
PA4
DAC_OUT
3. Getting started
The EVAL Board uses mini-USB connecter or AC/DC adapter to get power, the hardware
system power is +3.3V. Amini-USB cable and a J-Link tool are necessary to down programs.
Select the correct boot mode and then power on, the LED6 will turn on, which indicates the
power supply is ready.
There are Keil version and IAR version of all projects. Keil version of the projects are created
based on Keil MDK-ARM 4.74 uVision4. IAR version of the projects are created based on
IAR Embedded Workbench for ARM 7.40.2. During use, the following points should be
noted:
1. If you use Keil uVision4 to open the project, install the GD32F1x0_AddOn.3.2.0.exe to
load the associated files.
2. If you use Keil uVision5 to open the project, there are two ways to solve the "Device
Missing (s)" problem. One is to install GigaDevice.GD32F1x0_DFP.3.2.0.pack. In Project
menu, select the Manage sub menu, click on the “Version Migrate 5 Format...” menu, the Keil
uVision4 project will be converted to Keil uVision5 project. Then add “C:\Keil_v5\ARM
\Pack\ARM\CMSIS\4.2.0\CMSIS\Include” to C/C++ in Option for Target. The other is to
install Addon directly. Select the installation directory of Keil uVision5 software, such as
C:\Keil_v5, in Destination Folder of Folder Selection. Select the corresponding device in
Device of Option for Target and add “C:\Keil_v5\ARM\Pack\ARM\CMSIS\4.2.0\CMSIS
\Include” to C/C++ in Option for Target.
3. If you use IAR to open the project, install IAR_GD32F1x0_ADDON.3.2..0.exe to load the
associated files.

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4. Hardware layout overview
4.1. Power supply
Figure 4-1 Schematic diagram of power supply
G
1
Vout 2
Vin
34
U4 LM1117-3.3
E5
16V/10uF,AVX
E6
16V/10uF,AVX
GND
C20
50V/0.1uF
C21
50V/0.1uF
+3V3
LED6
LED0603
R32
470Ω
1
TP3
TP +3V3
+U5V P1
SMD1210P005TF
R36
0Ω
GND
VDDA
VSSA
C23
50V/0.1uF
+3V3 L1
EBLS1608-3R3K
PA12
PA11
PC2
+5V
+U5V
R37 1MΩ
C22 50V/4700pF
R33 22Ω
R34 22Ω
R35
1.5KΩ
VBUS 1
DM 2
DP 3
ID 4
GND 5
shield 6
CN1
Mini-USB
4.2. Boot option
Figure 4-2 Schematic diagram of boot option
R18
10KΩ
1
2
3
JP4
BOOT0
GND BOOT0
+3V3
Table 4-1 Boot configuration
BOOT1
BOOT0
Boot Mode
Default
2-3
User memory
1-2
System memory
Changed by ISP
1-2
SRAM memory

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4.3. LED
Figure 4-3 Schematic diagram of LED function
PC10
PC11
PC12
PD2
LED1
LED0603
LED2
LED0603
LED3
LED0603
LED4
LED0603
LED
R25
680Ω
R26
680Ω
R27
680Ω
R28
680Ω
GND
4.4. KEY
Figure 4-4 Schematic diagram of Key function
PA0
R29
10KΩ
+3V3
GND
C17
50V/0.1uF
PC13
R31
10KΩ
+3V3
GND
C19
50V/0.1uF
PF7
R30
10KΩ
+3V3
GND
C18
50V/0.1uF
KEY
K2
K-1102B
K3
K-1102B
K4
K-1102B

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4.5. USART
Figure 4-5 Schematic diagram of USART function
C1+
1V+ 2
C1-
3
C2+
4
C2-
5
V- 6
T2OUT 7
R2IN 8
R2OUT
9
T2IN
10 T1IN
11
R1OUT
12 R1IN 13
T1OUT 14
GND
15 VCC 16
U5
MAX3232CSE+
+3V3
GND
C2650V/0.1uF
C2850V/0.1uF
C27
50V/0.1uF
C25
50V/0.1uF C24 50V/0.1uF
GND 1
6
2
7
3
8
4
9
5
J2
COM0
GND
RS232
RS232_TX
RS232_RX
RS232_TX
RS232_RX
PA9
PA10
4.6. RS485
Figure 4-6 Schematic diagram of RS485 function
RO
1
RE
2
DE
3
DI
4GND 5
A6
B7
Vcc 8
U6
ST485ABDR
RS485
R38
120R 1
2
JP9
HEADER 2
C29
50V/0.1uF
+3V3
GND
GND
RS485_DIR
RS485_RX
RS485_TXPA2
PA3
RS485_DIR
1
2
3
JP12
HEADER 3
PA1
CMP0_IP
RS485_DIR
4.7. ADC/DAC
Figure 4-7 Schematic diagram of ADC/DAC function
+3V3
GND
ADC
C1
50V/0.1uF
R1
1KΩ
PC1VR1
10K
1
TP1
TP ADin
1
2
JP1
HEADER 2
GND
1
TP2
TP DAin
PA4
DAC

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4.8. I2S
Figure 4-8 Schematic diagram of I2S function
LRCK
1
DATA
2
BCK
3
PD
4
AGND
5
HGND
6
Vcom
7
HoutR
8
SCKI 16
HoutL 9
AIN 10
Vhp 11
VCC 12
MD 13
MC 14
MS 15
U2
PCM1770 PM
NRST
GND
+3V3
E2
16V/10uF,AVX
5
4
3
2
1
J1
HeadPhone
E3
10V/220uF,AVX
E4
10V/220uF,AVX
R7
16RR8
16R
C5
50V/0.22uF
C6
50V/0.22uF
GND
C4
50V/0.1uF
E116V/10uF,AVX
GND
GND
PA4
PA7
PA5
PA6
PA15
I2S
I2S_WS
I2S_DIN
I2S_CK
I2S_MCK
MSEL
MCLK
MDIN
I2S_MCLK
I2S_MDIN
4.9. I2C
Figure 4-9 Schematic diagram of I2C function
PB6
PB7
A0
1
A1
2
A2
3
GND
4SDA 5
SCL 6
WP 7
VCC 8
U1
AT24C02C-SSHM-T
+3V3
GND
R5
4.7KΩ
R6
4.7KΩ
I2C
C3
50V/0.1uF GND

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4.10. SPI-TF CARD
Figure 4-10 Schematic diagram of SPI-TF CARD function
+3V3
MicroSDcard
R41
10K
R40 0
+3V3
R39 0
PB4
PF4
SD/LCD_SPI_CLK
SD/LCD_SPI_MOSI
D2
1D3
2CMD
3VCC
4CLK
5GND
6D0
7D1
8CD
9CN2
TF_CARD_SOCKET
GND
E0
16V/10uF,AVX
4.11. SPI-TFT LCD
Figure 4-11 Schematic diagram of SPI-TFT LCD function
VCC
1
GND
2
TFT_CS
3
RESET
4
D/C
5
SDI(MOSI)
6
SCK
7
LED
8
SDO(MISO)
9
CN3
SPI_LCD_Interface
GND
PF5
PC4
PC3
PB4
R42
10KΩ
+3V3
SD/LCD_SPI_CLK
SD/LCD_SPI_MOSI
RESET
C30
50V/0.1uF
+3V3
+3V3
R44
10KΩ
1
2
3
JP10
HEADER 3
1
2
3
JP11
HEADER 3
PB3
PB5
SD/LCD_SPI_CLK
SD/LCD_SPI_MOSI
I2S_MCLK
I2S_MDIN

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4.12. USB
Figure 4-12 Schematic diagram of USB function
GND
R105 22R
R106 22R
R108
1MΩC104
50V/4700pF
L_USB_DM
L_USB_DP
GND
R107 1.5KΩL_USB_Ctr
VCC 1
D- 2
D+ 3
ID 4
GND 5
SHELL 6
CN100
Mini_USB
4.13. CMP
Figure 4-13 Schematic diagram of CMP function
R22
8.2K
R23
VT9ON1
+3V3
R21
0
CMP0_IP
COMPARATOR
4.14. HDMI-CEC
Figure 4-14 Schematic diagram of HDMI-CEC function
R24
27KΩ
+3V3
1
2
JP7
HEADER 2
GND
PB8
HDMI-CEC

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4.15. TSI
Figure 4-15 Schematic diagram of TSI function
A-1 B C A-2
1
2
3
4
TSI1
TSC-line-KEY
R12
10KΩ
R13
10KΩ
R14
10KΩ
C8
47nF
GND
PB11
PB14
PB13
PB12
ACTIVE SHIELD
C9
220nF
R15
2.2KΩ
PC5
GND
PB0
4.16. IFRP
Figure 4-16 Schematic diagram of IFRP function
+3V3
1
23
Q2
8050
GND
R10
1KΩ
R9
100Ω
PB9
LED5
KD-03144R
1
2
3
JP2
HS0038B
+5V
GND
GND
PC6
R11
10KΩ
C2
10V/4.7uF
R43
100Ω

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4.17. RTC
Figure 4-17 Schematic diagram of RTC function
1
2
3
JP5
Vbat select
VBAT
12 BT1
Battety
GND +3V3
4.18. GD-Link
Figure 4-18 Schematic diagram of GD-Link function
L_USB_Ctr
C100
50V/20pF
C102
50V/20pF
Y101
HC-49S-8MHz
GND
L_NRST
+3V3
GND
R102
10KΩ
C103
50V/0.1uF
R104
10KΩ
GND
C105
50V/0.1uF
C106
50V/0.1uF
C107
50V/0.1uF
C108
50V/0.1uF
R101
1MΩ
L_OSC_IN
L_OSC_OUTL_OSC_IN
L_OSC_OUT L_NRST
GND
+3V3
GND
1
2
3
4
JP100
4×1P2.54
+3V3
GND
MCU SWD
Reset
L_TMS/IO
L_TDI
L_TDO/SWO
L_TCK/CLK
L_USB_DP
L_SWDIO
L_SWDCK
L_SWDIO
L_SWDCK
+3V3
L_USB_DM
BOOT0
44
NRST
7
OSC_IN/PD0
5OSC_OUT/PD1
6
PA0-WKUP
10 PA1
11 PA2
12 PA3
13 PA4
14 PA5
15 PA6
16 PA7
17
PA8
29 PA9
30 PA10
31 PA11
32 PA12
33 PA13/JTMS/SWDIO
34 PA14/JTCK/SWCLK
37 PA15/JTDI
38
PB018
PB119
PB2/BOOT1 20
PB3/JTDO 39
PB4/JNTRST 40
PB541
PB642
PB743
PB845
PB946
PB10 21
PB11 22
PB12 25
PB13 26
PB14 27
PB15 28
PC13-TAMPER-RTC2
PC14-OSC32_IN3
PC15-OSC32_OUT4
VBAT
1
VDD_1
24 VDD_2
36 VDD_3
48
VDDA
9
VSS_1 23
VSS_2 35
VSS_3 47
VSSA 8
U0
GD32F103C8T6
L_TReset
L_LED1
L_LED2
L_LED1 LED0603
L_LED2 LED0603
R109 470Ω
R110 470ΩGND
GND
R105 22R
R106 22R
R108
1MΩC104
50V/4700pF
L_USB_DM
L_USB_DP
GND
R107 1.5KΩL_USB_Ctr
VCC 1
D- 2
D+ 3
ID 4
GND 5
SHELL 6
CN100
Mini_USB

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4.19. BEEPER
Figure 4-19 Schematic diagram of BEEPER function
BZ1
BUZZER-5V
+U5V
1
23
Q1
8050
GND
R3
1KΩ
R2
100Ω
PC7
R4
10KΩ
4.20. Extension
Figure 4-20 Schematic diagram of Extension Pin
1 2
3 4
5 6
7 8
910
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26
27 28
29 30
31 32
JP6
HEADER 16X2
1 2
3 4
5 6
7 8
910
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26
27 28
29 30
31 32
JP8
HEADER 16X2
PA14PA15 PC10PC11 PC12PD2PB3PB4PB5PB6PB7BOOT0 PB8PB9
GND
PC13
PC14PC15
PC0
PC1
PC2
PC3PA0
PA1PA2
PF7PF6PA13PA12 PA11PA10 PA9PA8PC9PC8PC7PC6PB15PB14 PB13PB12
GND
PB11PB10 PB2PB1PB0PC5PC4PA7PA6PA5PA4PF5PF4PA3
+3V3
+3V3

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4.21. MCU
Figure 4-21 Schematic diagram of MCU Pin
OSC8_IN
OSC8_OUT
VBAT
NRST
BOOT0
+3V3
+3V3
GND
GND
VDDA
VSSA
PB6
PB7
PC1
PB11
PB10
PB2
PB1
PB0
PC5
PC4
PA7
PA6
PA5
PA4
PF5
PF4
PA3
PA14
PA15
PC10
PC11
PC12
PD2
PB3
PB4
PB5
PB8
PB9
PC13 PC14
PC15
PC0
PC2
PC3
PA0 PA1
PA2
PF7 PF6
PA13 PA12
PA11 PA10
PA9 PA8
PC9 PC8
PC7 PC6
PB15 PB14
PB13 PB12
VBAT
1
PC13 - TAMPER0 - WKUP1
2
PC14 - OSC32_IN
3
PC15 - OSC32_OUT
4
PF0 - OSC_IN
5
PF1 - OSC_OUT
6
NRST
7
PC0
8
PC1
9
PC2
10
PC3
11
VSSA / VREF-
12
VDDA / VREF+
13
PA0 - TAMPER1 - WKUP0
14
PA1
15
PA2
16
PA317
PF418
PF519
PA420
PA521
PA622
PA723
PC424
PC525
PB026
PB127
PB228
PB10 29
PB11 30
VSS_2 31
VDD_2 32
PB12 33 PB13 34
PB14 35 PB15 36
PC637 PC738
PC839 PC940
PA841 PA942
PA10 43 PA11 44
PA12 45 PA13 46
PF647 PF748
PA14
49
PA15
50
PC10
51
PC11
52
PC12
53
PD2
54
PB3
55
PB4
56
PB5
57
PB6
58
PB7
59
BOOT0
60
PB8
61
PB9
62
VSS_1
63
VDD_1
64
U3
GD32150R8T6
5. Routine use guide
5.1. GPIO_Running_LED
5.1.1. DEMO purpose
This Demo includes the following functions of GD32 MCU:
Learn to use GPIO for controlling the LED
Learn to use SysTick to generate 1ms delay
GD32150R-EVAL-V1.3 board has four LEDs. The LED1, LED2, LED3 and LED4 are
controlled by GPIO. This demo will show how to light the LEDs.
5.1.2. DEMO running result
Download the program <01_GPIO_Running_LED> to the EVAL board, four LEDs will turn on
one by one from LED1 to LED4 every 200ms, and then turn off together. 200ms later, the
four LEDs work like previous again.

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5.2. GPIO_Key_Polling_mode
5.2.1. DEMO purpose
This Demo includes the following functions of GD32 MCU:
Learn to use GPIO control the LED and the KEY
Learn to use SysTick to generate 1ms delay
GD32150R-EVAL-V1.3 board has four keys and four LEDs. The four keys are Reset key,
Tamper key, User key and Wakeup key. The LED1, LED2, LED3 and LED4 are controlled by
GPIO.
This demo will show how to use the Tamper key to control the LED2. When press down the
User Key, it will check the input value of the IO port. If the value is 0, wait for 50ms. Then
check the input value of the IO port again. If the value is still 0, indicates that the button is
pressed down successfully, and light the LED2.
5.2.2. DEMO running result
Download the program <02_GPIO_Key_Polling_mode> to the EVAL board, first of all, all the
LEDs will be flashed once for test. Then press down the Tamper Key, LED2 will be turned on.
Press down the Tamper Key again, LED2 will be turned off.
5.3. EXTI_Key_Interrupt_mode
5.3.1. DEMO purpose
This Demo includes the following functions of GD32 MCU:
Learn to use GPIO to control the LED and the KEY
Learn to use EXTI to generate external interrupt
GD32150R-EVAL-V1.3 board has four keys and four LEDs. The four keys are Reset key,
Wakeup key, User key and Tamper key. The LED1, LED2, LED3 and LED4 are controlled by
GPIO.
This demo will show how to use EXTI interrupt line to control the LED2. When press down
the Tamper Key, it will produce an interrupt. In the interrupt service function, the demo will
toggle LED2.
5.3.2. DEMO running result
Download the program <03_EXTI_Key_Interrupt_mode> to the EVAL board, first of all, all
the LEDs will be flashed once for test. Then press down the Tamper Key, LED2 will be turned

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on. Press down the Tamper Key again, LED2 will be turned off.
5.4. GPIO_BEEPER
5.4.1. DEMO purpose
This Demo includes the following functions of GD32 MCU:
Learn to use GPIO control the beeper
Learn to use SysTick to generate 1ms delay
GD32150R-EVAL-V1.3 board has one beeper and connected by PC7. This demo will show
how to use GPIO to control the beeper.
5.4.2. DEMO running result
Download the program <04_GPIO_BEEPER> to the EVAL board, when the program running,
the status of the beeper will change every 200ms.
5.5. USART_Printf
5.5.1. DEMO purpose
This Demo includes the following functions of GD32 MCU:
Learn to use GPIO: the Tamper key control the LED
Learn to retarget the C library printf function to the USART
5.5.2. DEMO running result
Download the program <05_USART_Printf> to the EVAL board and connect serial cable to
COM. This implementation outputs “please press the Tamper Key” on the hyperterminal.
Press the Tamper key, serial port will output “USART Printf Example”. The information via a
serial port output as following.