GPIO引脚未驱动为高电平

你好，

我有一个问题。我将STM8S003K3的输出引脚（PC7）连接到STM8S207S的输入引脚（PC7）。当我将引脚设置为高电平时，我看不到STM8S207S的输入引脚PC7（作为中断输入）变为高电平。
以下是我的引脚配置：
STM8S003K3上的PC7：
PC_ODR = 0x00;
PC_CR1 = 0xFE; // pc7作为推拉
PC_CR2 = 0x00; // pc7速度高达10MHz
PC_DDR = 0x9E; // pc7作为输出
STM8S207SB上的PC7：
PC_ODR = 0x00;
PC_CR1 = 0xEE; // PC7拉起来
PC_DDR = 0x6E; //输入PC7

如果我直接测量STM8S003K3的PC7引脚而没有连接到PC7的
STM8S207S，它的工作原理。我看到这个引脚高低不一。寄存器输出也表明它正在做我想要的。
有人可以帮我吗？

您忠诚的，
HL
＃GPIO而不是持续的高



以下为原文




Hello,

Ich have a question. I am connecting the output pin (PC7) of STM8S003K3 to input pin (PC7) of STM8S207S. When I set the pin to high, I do not see the input pin PC7 (as interrupt input) of STM8S207S goes to high.
The following is my pin configuration:
PC7 on STM8S003K3:
PC_ODR = 0x00;   
PC_CR1 = 0xFE;  //pc7 as push pull
PC_CR2 = 0x00;  //pc7 speed up to 10MHz  
PC_DDR = 0x9E; //pc7 as output
PC7 on STM8S207SB:
PC_ODR = 0x00;   
PC_CR1 = 0xEE;  //PC7 is pull up
PC_DDR = 0x6E;  //PC7 is input

If I measured the PC7 pin of STM8S003K3 directly without it connected to the PC7 of  
STM8S207S, it works. I see this pin goes high and low. The register output also shows that it is doing what I want.
Anybody can help me on this?

Sincerely yours,
HL  
#gpio-not-going-high