3row，4col的矩阵按键，每次按下均收到12个按键值
以下是串口打印，GPIOB_Pin_8 interrupt是接收到INT中断，write是写寄存器，reg addr是对应的寄存器地址，receive是读寄存器的结果，数据均为16进制,我的理解应该是按下和释放单个按键都只能收到一个键值，十分不理解，请大佬帮助分析一下，盼回复，万分感谢！
====================config=====================
write device addr 34,reg addr 1, data 19
write device addr 34,reg addr 1d, data 7
write device addr 34,reg addr 1e, data f
============long press one button================
[10:38:41.277]收←◆GPIOB_Pin_8 interrupt,IT status 1,gpio input data 0
receive reg addr 2 is 1
receive reg addr 3 is 4
=============receive 4 keys press =================
receive reg addr 4,key value is 81
receive reg addr 4,key value is 82
receive reg addr 4,key value is 83
receive reg addr 4,key value is 84
GPIOB_Pin_8 interrupt,IT status 1,gpio input data 1
receive reg addr 2 is 0
receive reg addr 3 is 0
[10:38:41.371]收←◆GPIOB_Pin_8 interrupt,IT status 1,gpio input data 0
receive reg addr 2 is 1
receive reg addr 3 is 2
=============receive 2 keys press =================
receive reg addr 4,key value is 8d
receive reg addr 4,key value is 97
GPIOB_Pin_8 interrupt,IT status 1,gpio input data 1
receive reg addr 2 is 0
receive reg addr 3 is 0
GPIOB_Pin_8 interrupt,IT status 1,gpio input data 0
receive reg addr 2 is 11
receive reg addr 3 is 6
=============receive 6 keys press =================
receive reg addr 4,key value is 8b
receive reg addr 4,key value is 95
receive reg addr 4,key value is 8c
receive reg addr 4,key value is 96
receive reg addr 4,key value is 8e
receive reg addr 4,key value is 98
GPIOB_Pin_8 interrupt,IT status 1,gpio input data 1
receive reg addr 2 is 0
receive reg addr 3 is 0
=============release button =================
[10:38:46.793]收←◆GPIOB_Pin_8 interrupt,IT status 1,gpio input data 0
receive reg addr 2 is 1
receive reg addr 3 is 2
=============receive 2 keys release=================
receive reg addr 4,key value is 4
receive reg addr 4,key value is 18
GPIOB_Pin_8 interrupt,IT status 1,gpio input data 1
receive reg addr 2 is 0
receive reg addr 3 is 0
GPIOB_Pin_8 interrupt,IT status 1,gpio input data 0
receive reg addr 2 is 1
receive reg addr 3 is 1
=============receive 1 key release =================
receive reg addr 4,key value
[10:38:46.849]收←◆is e
GPIOB_Pin_8 interrupt,IT status 1,gpio input data 1
receive reg addr 2 is 0
receive reg addr 3 is 0
[10:38:46.884]收←◆GPIOB_Pin_8 interrupt,IT status 1,gpio input data 0
receive reg addr 2 is 1
receive reg addr 3 is 6
=============receive 6 keys release =================
receive reg addr 4,key value is 1
receive reg addr 4,key value is b
receive reg addr 4,key value is 15
receive reg addr 4,key value is 2
receive reg addr 4,key value is c
receive reg addr 4,key value is 16
GPIOB_Pin_8 interrupt,IT status 1,gpio input data 1
receive reg addr 2 is 1
receive reg addr 3 is 3
=============receive 3 keys release =================
receive reg addr 4,key value is 3
receive reg addr 4,key value is d
receive reg addr 4,key value is 17
======================end =======================
GPIOB_Pin_8 interrupt,IT status 1,gpio input data 1
receive reg addr 2 is 0
receive reg addr 3 is 0
