Differences

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--- en:c2_hardware_pwm [2016/02/26 11:18]
ck.kim created
+++ en:c2_hardware_pwm [2017/01/31 19:10] (current)
odroid [freq0]
@@ Line 2: / Line 2: @@
 ----
-**ODROID-C1** Has two possible PWM ports. One port is shared with SPI.
+**ODROID-C2** Has two possible PWM ports.
-Starting from [[C1_Ubuntu_release_note_v1.1|Ubuntu Release (v1.1)]] or a kernel update performed on 2015-01-01 or later includes the PWM support.
+Starting from [[c2_ubuntu_release_note_v1.1|Ubuntu Release (v1.1)]] or a kernel update performed on 2016-02-26 or later includes the PWM support.
 ===== Usage =====
-For pin position, numbers and names, please refer to the pinmap [[http://odroid.com/dokuwiki/doku.php?id=en:c1_hardware#expansion_connectors|Expansion Connector]]
+For pin position, numbers and names, please refer to the pinmap [[http://odroid.com/dokuwiki/doku.php?id=en:c2_hardware#expansion_connectors|Expansion Connector]]
-=== Option 1: Single PWM and SPI ===
+=== Option 1: Single PWM ===
 The code below loads the PWM module with a single PWM and the PWM controller module.
@@ Line 15: / Line 15: @@
 <code>
-sudo modprobe pwm-meson npwm=1
+sudo modprobe pwm-meson
 sudo modprobe pwm-ctrl
 </code>
-=== Option 2: Two PWM and **NO-SPI** ===
+=== Option 2: Two PWMs ===
 //**PWM PINS:**//
@@ Line 32: / Line 32: @@
 </code>
+<WRAP left round important 100%>
+If you are using TWO pwm setup, PWM1 & SPI can not be used simultaneously.\\
+Because GPIOX_7(pin19) has two function spi_mosi & pwm.
+</WRAP>
 ==== Examples of usage ====
 You can control this pwm via simple sysfs entries.
-On **/sys/devices/platform/pwm-ctrl** You'll find the following files:
+On **/sys/devices/platform/pwm-ctrl/** You'll find the following files:
 ==== duty0 ====
@@ Line 59: / Line 63: @@
 enable1, freq1, duty1
 </WRAP>
+==== How to access the PWM port in C language ====
+[[http://forum.odroid.com/viewtopic.php?f=141&t=25563#p177696|Example code by paulcrawford ]]