Part Number: TSC2046
使用TSC2046调试触摸屏,用的STM32F103的SPI1,发送指令0x93后,准备通过GPIO_ReadInputDataBit(GPIOD, GPIO_Pin_2)判断BUSY的电平再确读取数据,但是监测到BUSY引脚一直为高。这是什么原因?
参考下方链接的回复。
The busy pin is redundant and something from the developing history of this device.The busy signal is always from low to high at the falling edge of the 8th DCLK, and from high to low at the falling edge of the 9th DCLK.
也可以看一下数据手册,核对您的时序是否正确。
https://www.ti.com/lit/ds/symlink/tsc2046.pdf
下方链接也是类似问题,busy一直为高,主要还是看时序图。