From 8e7dfea803f618beaa2ad976dff0b196e449d5d9 Mon Sep 17 00:00:00 2001
From: Radomir Dopieralski
Date: Tue, 7 Jun 2016 21:40:56 +0200
Subject: esp8266/modpybhspi: Add a HSPI module for hardware SPI support

This module uses ESP8266's SPI hardware, which allows much higher
speeds. It uses a library from
https://github.com/MetalPhreak/ESP8266_SPI_Driver
---
 docs/esp8266/quickref.rst | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'docs')

diff --git a/docs/esp8266/quickref.rst b/docs/esp8266/quickref.rst
index 48543dfab..be58f9332 100644
--- a/docs/esp8266/quickref.rst
+++ b/docs/esp8266/quickref.rst
@@ -189,6 +189,20 @@ The SPI driver is implemented in software and works on all pins::
     spi.write_readinto(b'1234', buf) # write to MOSI and read from MISO into the buffer
     spi.write_readinto(buf, buf) # write buf to MOSI and read MISO back into buf
 
+
+Hardware SPI
+------------
+
+The hardware SPI is faster (up to 80Mhz), but only works on following pins:
+``MISO`` is gpio2, ``MOSI`` is gpio13, and ``SCK`` is gpio14. It has the same
+methods as SPI, except for the pin parameters for the constructor and init
+(as those are fixed).
+
+    from machine import Pin, HSPI
+
+    hspi = HSPI(baudrate=800000000, polarity=0, phase=0)
+
+
 I2C bus
 -------
 
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