触摸屏调试问题与解决-优快云博客

在韦东山的触摸屏实验中遇到了加载模块时异常采样数据和触摸数据偏差大的问题。通过分析发现设备处理中可能涉及mouse和event0的冲突。经过内核优化和代码调整，解决了初始化时的异常，并优化了中断处理机制，使得在未完成4次采样时能正确退出。

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在触摸屏实验里遇到的问题：

1. 在加载模块时，就会出现采样数据

# insmod ts.ko
input: s3c2440_touch_screen as /devices/virtual/input/input0
init touch screen input dev
pen down
adc_irq cnt = 0, x = 10, y = 543
adc_irq cnt = 1, x = 507, y = 420
adc_irq cnt = 2, x = 514, y = 420
adc_irq cnt = 3, x = 516, y = 420
pen up

不知何解？？

2.在触摸触摸屏弹出的数据更是奇怪，有些相差较大，下面是一次完整的触摸过程闯过来的数据，而且根本没有进入设置的过滤函数？？

# pen down
adc_irq cnt = 0, x = 124, y = 471
adc_irq cnt = 1, x = 186, y = 392
adc_irq cnt = 2, x = 224, y = 370
adc_irq cnt = 3, x = 258, y = 368
pen up
pen down
adc_irq cnt = 0, x = 70, y = 500
adc_irq cnt = 1, x = 371, y = 407
adc_irq cnt = 2, x = 121, y = 398
adc_irq cnt = 3, x = 185, y = 381
adc_irq cnt = 0, x = 154, y = 449
adc_irq cnt = 1, x = 279, y = 386
adc_irq cnt = 2, x = 156, y = 386
adc_irq cnt = 3, x = 135, y = 394
pen up
pen down
adc_irq cnt = 0, x = 95, y = 484
adc_irq cnt = 1, x = 335, y = 400

3.在input下的

# cat devices
I: Bus=0013 Vendor=dead Product=beef Version=0100
N: Name="s3c2440_touch_screen"
P: Phys=
S: Sysfs=/devices/virtual/input/input0
U: Uniq=
H: Handlers=mouse0 event0
B: EV=b
B: KEY=400 0 0 0 0 0 0 0 0 0 0
B: ABS=1000003

发现handler同时有mouse0 和ev