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-rw-r--r--wirish/pwm.cpp13
-rw-r--r--wirish/rules.mk2
2 files changed, 9 insertions, 6 deletions
diff --git a/wirish/pwm.cpp b/wirish/pwm.cpp
index a55f245..44884cd 100644
--- a/wirish/pwm.cpp
+++ b/wirish/pwm.cpp
@@ -2,6 +2,7 @@
* The MIT License
*
* Copyright (c) 2010 Perry Hung.
+ * Copyright (c) 2011, 2012 LeafLabs, LLC.
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
@@ -25,7 +26,8 @@
*****************************************************************************/
/**
- * @brief Arduino-style PWM implementation.
+ * @file wirish/pwm.cpp
+ * @brief Wiring-style pwmWrite().
*/
#include <wirish/pwm.h>
@@ -36,10 +38,11 @@
#include <wirish/boards.h>
void pwmWrite(uint8 pin, uint16 duty_cycle) {
- timer_dev *dev = PIN_MAP[pin].timer_device;
- if (pin >= BOARD_NR_GPIO_PINS || dev == NULL || dev->type == TIMER_BASIC) {
+ if (pin >= BOARD_NR_GPIO_PINS) {
return;
}
-
- timer_set_compare(dev, PIN_MAP[pin].timer_channel, duty_cycle);
+ timer_dev *dev = PIN_MAP[pin].timer_device;
+ uint8 cc_channel = PIN_MAP[pin].timer_channel;
+ ASSERT(dev && cc_channel);
+ timer_set_compare(dev, cc_channel, duty_cycle);
}
diff --git a/wirish/rules.mk b/wirish/rules.mk
index 54c9180..176ba6a 100644
--- a/wirish/rules.mk
+++ b/wirish/rules.mk
@@ -25,6 +25,7 @@ cppSRCS_$(d) += cxxabi-compat.cpp
cppSRCS_$(d) += HardwareSerial.cpp
cppSRCS_$(d) += HardwareTimer.cpp
cppSRCS_$(d) += Print.cpp
+cppSRCS_$(d) += pwm.cpp
cppSRCS_$(d) += wirish_analog.cpp
cppSRCS_$(d) += wirish_digital.cpp
cppSRCS_$(d) += wirish_math.cpp
@@ -36,7 +37,6 @@ cppSRCS_$(d) += $(WIRISH_BOARD_PATH)/board.cpp
# TODO: revise these appropriately F2 and put them back in:
# HardwareSPI.cpp
# usb_serial.cpp
-# pwm.cpp
# ext_interrupts.cpp
sFILES_$(d) := $(sSRCS_$(d):%=$(d)/%)