ESP8266 Developer Zone

Re: 想请问有关HSPI的几个问题

2017-10-05T22:47:03+08:00

ddze7374 wrote:
SPI frequency is limited by the maximum frequency of the Master device. In case of the software controlled SPI on the ESP8266 , it is 80 MHz.

ESP8266 HSPI做从设备时，实际可靠的SPI频率只能到20MHz。超过20MHz后，固件需要做特殊的处理，才可以达到40MHz。
As a slave, ESP8266 HSPI can reach only 20MHz for a reliable communication. Special handling on firmwares will be required from both master and slave sides to achieve a reliable spi communication upto 40MHz.

Statistics: Posted by Guest — Thu Oct 05, 2017 10:47 pm

Re: 想请问有关HSPI的几个问题

2017-09-23T18:39:42+08:00

SPI frequency is limited by the maximum frequency of the Master device. In case of the software controlled SPI on the ESP8266 , it is 80 MHz.

Statistics: Posted by ddze7374 — Sat Sep 23, 2017 6:39 pm

Re: 想请问有关HSPI的几个问题

2017-05-18T14:59:55+08:00

spi 的clock是多少频率？

Statistics: Posted by costaud — Thu May 18, 2017 2:59 pm

Re: 想请问有关HSPI的几个问题

2017-05-17T18:16:16+08:00

感谢回复

1.那请问该如何设定?我把脚位设成HSPI马上就变成低准位了

2.CS比CLK提早50uS

Statistics: Posted by f4568525153 — Wed May 17, 2017 6:16 pm

Re: 想请问有关HSPI的几个问题

2017-05-16T10:48:44+08:00

您好，

1. 可以。
2. 请问具体是想设置成多久？

感谢您对 ESP8266 的关注！

Statistics: Posted by ESP_Faye — Tue May 16, 2017 10:48 am

想请问有关HSPI的几个问题

2017-05-15T11:01:31+08:00

我想问几个有关HSPI的问题
1.CLK、MOSI 手册说明是空闲低电平，能改成空闲高电平吗?
2.CS下拉与CLK之间的间可以设定吗?
谢谢

Statistics: Posted by f4568525153 — Mon May 15, 2017 11:01 am