L6470连续读出状态寄存器电机不会移动

嗨，


我正在玩L6470，最终效果很好。但现在我遇到了以下问题：我想持续监控L6470的状态寄存器。但是当我使用 GetParam 命令读出状态寄存器后立即向设备发送 run 命令时，电机不会移动。如果我以相反的方式做到这一点我。即当我第一次发送 run 命令然后发送 GetParam 命令时，电机按预期转动但我收到状态寄存器高低字节的零（＆amp; H0）。做错了什么，或者实际情况是通过SPI发送两个命令之间必须暂停？如果是这样，这段时间有多长？并且只是为了澄清：这也意味着，存在用于改变电动机速度的最大频率（例如，根据快速控制回路的需要，不可能在例如1kHz发送新的速度值）？

我非常感谢任何有用的提示。非常感谢！

最好，
马尔特
＃L6470



以下为原文




Hi,


I�m playing around with the L6470 which finally worked quite well. But now I�m experiencing the following issue: I want to continuously monitor the status register of the L6470. But when I send a �run� command to the device immediately after using the �GetParam� command to read out the status register the motor does not move. If I do it the other way around i. e. when I first send the �run� command and then the �GetParam� command the motor turns as intended but I receive zeros (&H0) for the status register high and low byte. Have done something wrong or is it actually the case that there has to be a pause between sending two commands via SPI? If so, how long is this interval? And just to clarify: that would also mean, that there is a maximum frequency for changing the motor speed (e.g. it is not possible to send a new speed value at e.g. 1 kHz as needed for a quick control loop)?

I would very much appreciate any helpful hints. Thanks a lot!

Best,
Malte  
#l6470