[问答]

LPS22HB PLE中断不起作用

问答对人有帮助，内容完整，我也想知道答案 0 你好我正在使用ST的LPS22HB评估板，并在压力突然下降时尝试产生中断。因此根据数据手册，这将是一个PLE事件（0x0B寄存器的第2位）以下是我的注册设置 - reg 0x10 - 0x50 reg 0x12 - 0x03 reg 0x0B - 0x0A 我将阈值寄存器0x0C和0x0D设置为压力读数的当前值。我希望int引脚在创建外部低压事件后将状态从低电平变为高电平，但没有变化。甚至来自寄存器0x25的中断标志IA或PL也未置位。现在为了确保我没有坏设备，我设置LPS22HB以产生高压事件的中断。所以我设置位PHE（0x0B寄存器中的第1位），并在创建高压事件时产生中断IS。所以一切都适用于高压事件中断。设置了寄存器0x25中的PH和IA标志。 reg 0x10 - 0x50 reg 0x12 - 0x03 reg 0x0B - 0x09 当我轮询寄存器0x28,0x29,0x30时的压力读数也是正确的。这只是低压中断事件不起作用。不幸的是，我的产品最需要这个低压中断事件，如果无法修复LPS22HB将是不行的。这对我来说似乎是个错误。 ST有没有人可以调查这个？或者这个论坛中是否有人让这个工作？以上来自于谷歌翻译以下为原文 Hi I am working with the LPS22HB eval board from ST and trying to generate an interrupt when the pressure drops suddenly. So according to the data sheet this would be a PLE event (2nd bit of 0x0B register) Below are my register settings - reg 0x10 - 0x50 reg 0x12 - 0x03 reg 0x0B - 0x0A I set the threshold registers 0x0C and 0x0D to the current value of pressure reading. I would expect that the int pin to change state from low to high after creating an external low pressure event but there is no change. Even the interrupt flag IA or PL from reg 0x25 is not set. Now to make sure I did not have a bad device, I set the LPS22HB for generating an interrupt for a high pressure event. So I set bit PHE (1st bit in 0x0B reg) and the interrupt IS generated when I create a high pressure event. So everything works fine for a high pressure event interrupt. PH and IA Flag in reg 0x25 is set. reg 0x10 - 0x50 reg 0x12 - 0x03 reg 0x0B - 0x09 The pressure readings when I poll registers 0x28, 0x29, 0x30 are also correct. It is just the low pressure interrupt event the is not working. Unfortunately my product needs this low pressure interrupt event the most and LPS22HB would be a no-go if this cannot be fixed. This seems like a bug to me. Is there anyone from ST that could look into this? Or is there anyone in this forum who got this working? 0
2018-9-21 16:59:18　　评论淘帖0 邀请回答您可以邀请以下用户，快速回答问题 × wang21cj 该类别下有 47 个回答。邀请回答 chm5 该类别下有 44 个回答。邀请回答新星之火12138 该类别下有 42 个回答。邀请回答 hgimtk 该类别下有 36 个回答。邀请回答 HengDu 该类别下有 31 个回答。邀请回答可口可甜该类别下有 30 个回答。邀请回答 hwp0415229 该类别下有 30 个回答。邀请回答麻酱该类别下有 28 个回答。邀请回答 andyfly7 该类别下有 28 个回答。邀请回答 jghgfdssas 该类别下有 28 个回答。邀请回答 jiangwenwen 该类别下有 28 个回答。邀请回答 kingnet6688 该类别下有 28 个回答。邀请回答颜刚YanG 该类别下有 27 个回答。邀请回答柱子图宁该类别下有 27 个回答。邀请回答 bluepink 该类别下有 27 个回答。邀请回答法规处发该类别下有 27 个回答。邀请回答 ldliu 该类别下有 27 个回答。邀请回答成长的小师弟该类别下有 27 个回答。邀请回答云汉007 该类别下有 27 个回答。邀请回答 sfafa 该类别下有 26 个回答。邀请回答举报王欢相关推荐 • LPS22HB给出相同的值 1924 • LPS22HB比LPS25HB更精确吗？ 3346 • Unico是否有更新版本的LPS22HB传感器 1971 • LPS22HB和LPS25HB上的硅方块是多少？ 1931 • LPS22HB设备驱动程序无法找到 2394 • LPS22HB WRONG默认值与数据表中不一致 1155 • LPS22HB单发模式读取状态和压力数据没有变化 3513 • LPS22HB校准如何使用单点校准重置寄存器？ 2514 • 为什么LPS22HB传感器会出现压力波动的情况呢？ 516 • lps22hb无压力和温度响应 1405 2个回答

答案对人有帮助，有参考价值 0 覆盖MEMS的@ST社区（ST员工）？以上来自于谷歌翻译以下为原文 @ST Community (ST Employee) who is covering MEMS?

2018-9-21 17:06:05 评论举报符伯峪

答案对人有帮助，有参考价值 0 似乎中断设置有点棘手。请查看LPS22HB数据表中的第9.1章。该中断仅在差分模式下工作，因此您必须使用AUTOZERO功能并根据实际压力调整阈值。我认为在您输入AUTOZERO功能后还可以选择更改参考，这样您就不需要计算实际压力，只需设置参考值和阈值即可。以上来自于谷歌翻译以下为原文 It seems the interrupts settings is little bit tricky. Please check chapter 9.1 in the LPS22HB datasheet. The interrupt works only in differential mode so you will have to use the AUTOZERO function and adjust the threshold according to the actual pressure. I think there is also option to change the reference after you enter the AUTOZERO function so you don't need to count with actual pressure, you just set the reference and threshold.

2018-9-21 17:23:39 评论举报曾玲娟