标题: STM32单片机矩阵键盘逻辑写的没有问题,但一直不出功能,求大佬 [打印本页] 作者: xuanchenxing101 时间: 2024-6-13 14:43 标题: STM32单片机矩阵键盘逻辑写的没有问题,但一直不出功能,求大佬 STM32矩阵键盘逻辑写的没有问题,但一直不出功能,求大佬 作者: xxxevery 时间: 2024-6-13 16:28
啥也没有能说啥作者: heihei51aaaaa 时间: 2024-6-13 18:21
Many microcontrollers have different locations for accesing the inputs and outputs. For example on ATMEL AVR microcontroler to read or write the logical values to port B you use PORTB. To read the actual phisical value of port B you will need to use PINB. Example: "in r16,PINB" will read the physical bits of port B. This is what you need to use to read the keyboard matrix.作者: heihei51aaaaa 时间: 2024-6-13 18:25
Maybe you are reading the logical value of the keyboard matrix i/o port instead of reading the phisical value.
On ATMEL AVR microcontroller, to read the logical value of port b for example you use:
in r16,PORTB
To read the actual phisical value of port b you will use:
in r16,PINB
So, in your matrix keyboard you need to read the physical value (the real value), not the logical value from the port. 作者: wnk64 时间: 2024-6-13 22:02
不发原理图,不发代码,谁知道你写的啥啊,一个矩阵键盘能需要什么逻辑