STM32G030F6P6最小系统板 | SleePfatの小窝

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Development Board

TSSOP20封装引脚图

PIN	PIN name	PIN type	I/O structure	Alternate functions	Additional functions
1	PB7	I/O	FT_fa	USART1_RX, SPI2_MOSI, TIM17_CH1N, I2C1_SDA, EVENTOUT	ADC_IN11
1	PB8	I/O	FT_f	SPI2_SCK, TIM16_CH1, I2C1_SCL, EVENTOUT	ㅤ
2	PB9	I/O	FT_f	IR_OUT, TIM17_CH1, SPI2_NSS, I2C1_SDA, EVENTOUT	ㅤ
2	PC14-OSC32_IN	I/O	FT	TIM1_BK2	OSC32_IN, OSC_IN
3	PC15-OSC32_OUT	I/O	FT	OSC32_EN, OSC_EN	OSC32_OUT
4	VDD/VDDA	S	ㅤ	ㅤ	ㅤ
5	VSS/VSSA	S	ㅤ	ㅤ	ㅤ
6	NRST	I/O	RST	ㅤ	NRST
7	PA0	I/O	FT_a	SPI2_SCK, USART2_CTS	ADC_IN0, TAMP_IN2, WKUP1
8	PA1	I/O	FT_ea	SPI1_SCK/I2S1_CK, USART2_RTS_DE_CK, I2C1_SMBA, EVENTOUT	ADC_IN1
9	PA2	I/O	FT_a	SPI1_MOSI/I2S1_SD, USART2_TX	ADC_IN2, WKUP4,LSCO
10	PA3	I/O	FT_ea	SPI2_MISO, USART2_RX, EVENTOUT	ADC_IN3
11	PA4	I/O	FT_a	SPI1_NSS/I2S1_WS, SPI2_MOSI, TIM14_CH1, EVENTOUT	ADC_IN4, TAMP_IN1, RTC_TS, RTC_OUT1, WKUP2
12	PA5	I/O	FT_ea	SPI1_SCK/I2S1_CK, EVENTOUT	ADC_IN5
13	PA6	I/O	FT_ea	SPI1_MISO/I2S1_MCK, TIM3_CH1, TIM1_BK, TIM16_CH1	ADC_IN6
14	PA7	I/O	FT_a	SPI1_MOSI/I2S1_SD, TIM3_CH2, TIM1_CH1N, TIM14_CH1, TIM17_CH1	ADC_IN7
15	PB0	I/O	FT_ea	SPI1_NSS/I2S1_WS, TIM3_CH3, TIM1_CH2N	ADC_IN8
15	PB1	I/O	FT_ea	TIM14_CH1, TIM3_CH4, TIM1_CH3N, EVENTOUT	ADC_IN9
15	PB2	I/O	FT_ea	SPI2_MISO, EVENTOUT	ADC_IN10
15	PA8	I/O	FT	MCO, SPI2_NSS, TIM1_CH1, EVENTOUT	ㅤ
16	PA11 [PA9]	I/O	FT_fa	SPI1_MISO/I2S1_MCK, USART1_CTS, TIM1_CH4, TIM1_BK2, I2C2_SCL	ADC_IN15
17	PA12 [PA10]	I/O	FT_fa	SPI1_MOSI/I2S1_SD, USART1_RTS_DE_CK, TIM1_ETR, I2S_CKIN, I2C2_SDA	ADC_IN16
18	PA13	I/O	FT_ea	SWDIO, IR_OUT, EVENTOUT	ADC_IN17
19	PA14-BOOT0	I/O	FT_a	SWCLK, USART2_TX, EVENTOUT	ADC_IN18, BOOT0
19	PA15	I/O	FT	SPI1_NSS/I2S1_WS, USART2_RX, EVENTOUT	ㅤ
20	PB3	I/O	FT	SPI1_SCK/I2S1_CK, TIM1_CH2, USART1_RTS_DE_CK, EVENTOUT	ㅤ
20	PB4	I/O	FT	SPI1_MISO/I2S1_MCK, TIM3_CH1, USART1_CTS, TIM17_BK, EVENTOUT	ㅤ
20	PB5	I/O	FT	SPI1_MOSI/I2S1_SD, TIM3_CH2, TIM16_BK, I2C1_SMBA	WKUP6
20	PB6	I/O	FT_f	USART1_TX, TIM1_CH3, TIM16_CH1N, SPI2_MISO, I2C1_SCL, EVENTOUT	ㅤ

PC13, PC14 and PC15 are supplied through the power switch. Since the switch only sinks a limited amount of current (3 mA), the use of GPIOs PC13 to PC15 in output mode is limited:

The speed should not exceed 2 MHz with a maximum load of 30 pF

These GPIOs must not be used as current sources (for example to drive a LED).

After an RTC domain power-up, PC13, PC14 and PC15 operate as GPIOs. Their function then depends on the content of the RTC registers. The RTC registers are not reset upon system reset. For details on how to manage these GPIOs, refer to the RTC domain and RTC register descriptions in the RM0444 reference manual.

As in SO8N device, the PA0, PA1, and PA2 GPIOs are bonded with NRST on the pin 4, low level applied to any of these GPIOs provokes the device reset. To prevent the risk of spurious resets, keep these GPIOs configured at all times as analog or digital inputs (as opposed to output or alternate function).

Pins PA9 and PA10 can be remapped in place of pins PA11 and PA12 (default mapping), using SYSCFG_CFGR1 register.

Upon reset, these pins are configured as SW debug alternate functions, and the internal pull-up on PA13 pin and the internal pull-down on PA14 pin are activated.

Custom Function

SomeType To String

uint32_t --> string, align-right

float --> string

Sample

AHT20 温湿度采样 OLED显示输出

设计功能

I2C2总线下挂载AHT20和0.91寸OLED两个Slave

使用I2C控制AHT20采样温湿度数据

使用I2C控制OLED显示

将AHT20采集到的温湿度数据显示到OLED上

CubeMX GPIO 设置总览

引脚	模式	备注	速率	用途
PA11	I2C2_SCL	外部电阻上拉	Fast-Mode	SCL
PA12	I2C2_SDA	外部电阻上拉	Fast-Mode	SDA
PA13	SWDIO	ㅤ	ㅤ	SWD
PA14	SWCLK	ㅤ	ㅤ	SWD

CubeMX 其他设置

RCC时钟源 HSI通过PLLCLK锁相环8倍频至64MHz

Code

相关库 🔗SSD1306驱动 & font字库 🔗AHT20驱动

main.c

Memory region

运行效果

< - - 功耗优化- - >

CubeMX Configeration:

HSI Clock Frequency --> 16MHz (Reduce 4.2mA)

Timer RTC: Activate Clock Source; WakeUp: Internal WakeUp

NVIC: Enable RTC interrupts, Preemption Priority 0

main.c

Memory region

Finally

优化前整个系统功耗为 14.2mA 左右，优化后长期保持 8.8mA

当 CPU 从 STOP1 模式唤醒，系统功耗升至 9.9mA，处理完 AHT20 和 OLED 显示刷新后再次进入 STOP1 模式保持 8.8mA

系统采用了 AMS1117 作为 3.3V 供电的输出，该芯片静态功耗 4mA 左右，可换为如 ME6206 这类低静态功耗的 LDO

OLED亮度设置 0x00~0xFF，对应 0~255 级亮度，调制 0x2F 可兼顾功耗和亮度，此时 OLED 电流仅有 1.7mA，对比 0xFF 最大亮度时的 4.8mA 有很大提升

INA226 电压电流采样 OLED显示输出

参考链接 🔗2.46 INA226 电压电流功率检测模块（来自云胡不喜的贡献） 🔗STM32 驱动 INA226 测量电流电压功率 -- 优信电子 | CSDN

设计功能

I2C2总线下挂载INA226和0.91寸OLED两个Slave

使用I2C控制INA226采样被测设备的电压电流数据

使用I2C控制OLED显示

将INA226采集到的数据显示到OLED上

CubeMX GPIO 设置总览

引脚	模式	备注	GPIO Speed	用途
PA5	GPIO_Output	外部电阻上拉	High	Software SCL
PA6	GPIO_Output	外部电阻上拉	High	Software SDA
PA13	SWDIO	ㅤ	ㅤ	SWD
PA14	SWCLK	ㅤ	ㅤ	SWD
PA11	I2C2_SCL	外部电阻上拉	Fast-Mode	SCL
PA12	I2C2_SDA	外部电阻上拉	Fast-Mode	SDA