[问答]

L3GD20看不到DRDY信号从高电平转换为低电平

问答对人有帮助，内容完整，我也想知道答案 0 你好。我想在L3GD20可用时处理每组读数。 DRDY信号似乎是最合适的方式。我已经与STMicro工程师确认我的寄存器设置是正确的（只需在正常模式下使用DRDY信号），但我看不到DRDY信号从高电平转换为低电平。它始终保持高位。我正在使用HP混合信号'示波器，我正在观看所有其他信号（SPI /芯片选择等），没有任何问题。当我打开FIFO并配置DRDY信号以指示FIFO何时填充超出水印（我设置为1）时，我可以让DRDY转换为低电平，但DRDY应该在没有FIFO的情况下工作。有人看到过这种行为吗？以上来自于谷歌翻译以下为原文 Hello. I want to process each set of readings from the L3GD20 as they become available. The DRDY signal seems the most appropriate way to do this. I've verified with an STMicro engineer that my register settings are correct (simply use the DRDY signal in its normal mode), but I can't see the DRDY signal transitioning from high to low. It stays high all the time. I'm using an HP mixed signal 'scope and I'm watching all the other signals (SPI/chip selects, etc) with no problem. I can get DRDY to transition to low when I turn the FIFO on and configure the DRDY signal to indicate when the FIFO fills beyond the watermark (which I set to 1), but DRDY is supposed to work without the FIFO. Has anybody seen this behavior? 0
2018-9-30 10:40:00　　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 44 个回答。邀请回答新星之火12138 该类别下有 41 个回答。邀请回答 chm5 该类别下有 39 个回答。邀请回答 hgimtk 该类别下有 33 个回答。邀请回答 HengDu 该类别下有 30 个回答。邀请回答 jghgfdssas 该类别下有 28 个回答。邀请回答 hwp0415229 该类别下有 28 个回答。邀请回答可口可甜该类别下有 26 个回答。邀请回答 kingnet6688 该类别下有 26 个回答。邀请回答颜刚YanG 该类别下有 26 个回答。邀请回答 zyh34997 该类别下有 25 个回答。邀请回答柱子图宁该类别下有 25 个回答。邀请回答 kingnet9999 该类别下有 25 个回答。邀请回答 jenny042 该类别下有 25 个回答。邀请回答 andyfly7 该类别下有 25 个回答。邀请回答麻酱该类别下有 25 个回答。邀请回答成长的小师弟该类别下有 24 个回答。邀请回答 gXDhn 该类别下有 24 个回答。邀请回答 jiangwenwen 该类别下有 24 个回答。邀请回答哼小曲该类别下有 24 个回答。邀请回答举报张萍相关推荐 • L3GD20是否有FIFO空中断？ 1819 • L3GD20对于测量3轴角度有用吗？ 1511 • 除了零速率和灵敏度之外，还需要在L3GD20上执行任何其他校准吗？ 1234 • 请问L3GD20 FIFO和LIS3DH加速度计FIFO之间有什么区别？ 2033 • 用的传感器输出的是高电平，需要低电平触发，除了用反向器，还有没有别的电路，可以实现从高电平到低电平的转换？ 9651 • AD7705的DRDY为什么一直是高电平？ 267 • 请问AD7705的DRDY为什么一直是高电平？ 5623 • 有谁知道为什么AD7712的DRDY引脚一直是高电平吗？ 219 • ad7656bstz busy无高电平转换信号是为什么？ 293 • L3GD20初始化寄存器没有成功写入 1950 2个回答

答案对人有帮助，有参考价值 0 我弄清楚发生了什么事。我的初始化例程将寄存器设置为应该设置，然后调用my _GetReadings例程来执行轴值的初始读取。但是，在调用该例程之前，我没有正确设置寄存器编号，所以它实际上并没有读取轴寄存器。然后芯片将DRDY拉高并简单地将其留在那里，因为我没有“读取”来自内存的值。一旦我纠正了这个问题，芯片开始按预期转换DRDY，我现在正在按要求收集读数。此配置不使用FIFO，只在配置寄存器中启用DRDY / INT2信号。以上来自于谷歌翻译以下为原文 I figured out what was going on. My initialization routine set the registers up as they should be set, then called my _GetReadings routine to perform that initial read of the axis values. However, I wasn't setting the register number correctly prior to calling that routine, so it really wasn't reading the axis registers. The chip would then bring DRDY high and simply leave it there, since I wasn't ''reading'' the values from memory. Once I corrected this problem, the chip started transitioning DRDY as expected, and I'm now gathering readings as required. This configuration does NOT use the FIFO and the DRDY/INT2 signal is simply enabled in the configuration registers.

2018-9-30 10:55:58 评论举报张萍

答案对人有帮助，有参考价值 0 理查德你好，感谢您发布问题并提供问题的解决方案。如果有任何我可以做的事情来支持你，请告诉我。谢谢，蒂亚戈以上来自于谷歌翻译以下为原文 Hello Richard, Thank you for posting your question and also providing a solution to the issue. Please do let me know if there is anything that I can do to support you. Thank you, Thiago

2018-9-30 11:10:32 评论举报张鑫