41 lines
1.6 KiB
Markdown
41 lines
1.6 KiB
Markdown
1、功能说明
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1.LPTIM定时产生EXTI20中断，唤醒CPU进行IO翻转
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2、使用环境
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软件开发环境：KEIL MDK-ARM V5.34.0.0
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IAR EWARM V8.50.1
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硬件环境：基于N32G430C8L7-STB V1.0开发
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3、使用说明
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系统配置;
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1.时钟源：
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HSE = 8M, PLL = 128M, AHB = 128M, APB1 = 32M, APB2 = 64M, LPTIM CLK = LSI 40K
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2.中断：
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LPTIM周期触发EXTI20中断，唤醒CPU
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3.端口配置：
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PB7被选为IO输出
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4. LPTIM：
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LPTIM连续计时模式
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指示：
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1.编译后开启debug模式，可以观察到PA1脚有一个周期翻转，CPU继续进入低功耗模式
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4、注意事项
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无
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1. Function description
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1. LPTIM generates EXTI20 interrupt regularly, wakes up the CPU for IO flipping
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2. Use environment
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Software development environment: KEIL MDK-ARM V5.34.0.0
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Hardware environment: Developed based on the evaluation board N32G430C8L7-STB V1.0
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3. Instructions for use
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System Configuration;
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1. Clock source:
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HSE = 8M, PLL = 128M, AHB = 128M, APB1 = 32M, APB2 = 64M, LPTIM CLK = LSI 40K
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2. Interrupt:
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LPTIM cycle triggers EXTI20 interrupt, wakes up CPU
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3. Port configuration:
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PB7 is selected as IO output
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4. LPTIM:
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LPTIM Continuous Timing Mode
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Instructions:
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1. Turn on the debug mode after compiling, and it can be observed that the PA1 pin has a cycle flip, and the CPU continues to enter the low-power mode
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4. Matters needing attention
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none |