michaelh/zephyr
1
0
Fork 0
Code Releases Activity

shields: add Sparkfun MAX3421E shield support

Browse source 
Add Sparkfun MAX3421E shield support.

Signed-off-by: Johann Fischer <johann.fischer@nordicsemi.no>
This commit is contained in:
Johann Fischer 2022-01-10 13:43:29 +01:00 • committed by Carles Cufí
commit bb7ab1e0f2
4 changed files with 91 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

9
boards/shields/max3421e/Kconfig.defconfig Normal file
View file

@ -0,0 +1,9 @@
# Copyright (c) 2022 Nordic Semiconductor ASA
# SPDX-License-Identifier: Apache-2.0
if SHIELD_SPARKFUN_MAX3421E
config UHC_DRIVER
default y
endif # SHIELD_SPARKFUN_MAX3421E

5
boards/shields/max3421e/Kconfig.shield Normal file
View file

@ -0,0 +1,5 @@
# Copyright (c) 2022 Nordic Semiconductor ASA
# SPDX-License-Identifier: Apache-2.0
config SHIELD_SPARKFUN_MAX3421E
def_bool $(shields_list_contains,sparkfun_max3421e)

58
boards/shields/max3421e/doc/index.rst Normal file
View file

@ -0,0 +1,58 @@
.. _max3421e_shield:
MAX3421E Shield
###############
Overview
********
Support for expansion boards (shields) based on MAX3421E USB Peripheral/Host
controller.
Sparkfun USB Host Shield
************************
Pins Assignment of the Shield Connector
=======================================
+-----------------------+-----------------------+-----------------------------+
| Shield Connector Pin | Function | MAX3421E Pin |
+=======================+=======================+=============================+
| D0 | not connected | |
+-----------------------+-----------------------+-----------------------------+
| D1 | not connected | |
+-----------------------+-----------------------+-----------------------------+
| D2 | not connected | |
+-----------------------+-----------------------+-----------------------------+
| D3 | not connected | |
+-----------------------+-----------------------+-----------------------------+
| D4 | not connected | |
+-----------------------+-----------------------+-----------------------------+
| D5 | not connected | |
+-----------------------+-----------------------+-----------------------------+
| D6 | not connected | |
+-----------------------+-----------------------+-----------------------------+
| D7 | RESET pin | |
+-----------------------+-----------------------+-----------------------------+
| D8 | not connected | |
+-----------------------+-----------------------+-----------------------------+
| D9 | INTn | 24 (Interrupt Output) |
+-----------------------+-----------------------+-----------------------------+
| D10 | SPI CSn | 34 (SPI Chip Select) |
+-----------------------+-----------------------+-----------------------------+
| D11 | SPI MOSI | 36 (SPI Serial Data Input) |
+-----------------------+-----------------------+-----------------------------+
| D12 | SPI MISO | 35 (SPI Serial Data Out) |
+-----------------------+-----------------------+-----------------------------+
| D13 | SPI SCK | 37 (SPI Serial Clock Input) |
+-----------------------+-----------------------+-----------------------------+
| D14 | not connected | |
+-----------------------+-----------------------+-----------------------------+
| D15 | not connected | |
+-----------------------+-----------------------+-----------------------------+
Programming
***********
Set ``-DSHIELD=sparkfun_max3421e`` when you invoke ``west build`` or ``cmake``
in your Zephyr application.

19
boards/shields/max3421e/sparkfun_max3421e.overlay Normal file
View file

@ -0,0 +1,19 @@
/*
* Copyright (c) 2022 Nordic Semiconductor ASA
*
* SPDX-License-Identifier: Apache-2.0
*/
&arduino_spi {
status = "okay";
cs-gpios = <&arduino_header 16 GPIO_ACTIVE_LOW>; /* D10 */
zephyr_uhc0: max3421e@0 {
compatible = "maxim,max3421e_spi";
spi-max-frequency = <26000000>;
int-gpios = <&arduino_header 15 GPIO_ACTIVE_LOW>; /* D9 */
reset-gpios = <&arduino_header 13 GPIO_ACTIVE_LOW>; /* D7 */
status = "okay";
reg = <0>;
};
};