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Diffstat (limited to 'wirish/pwm.cpp')
-rw-r--r-- | wirish/pwm.cpp | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/wirish/pwm.cpp b/wirish/pwm.cpp new file mode 100644 index 0000000..44884cd --- /dev/null +++ b/wirish/pwm.cpp @@ -0,0 +1,48 @@ +/****************************************************************************** + * 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 + * files (the "Software"), to deal in the Software without + * restriction, including without limitation the rights to use, copy, + * modify, merge, publish, distribute, sublicense, and/or sell copies + * of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + *****************************************************************************/ + +/** + * @file wirish/pwm.cpp + * @brief Wiring-style pwmWrite(). + */ + +#include <wirish/pwm.h> + +#include <libmaple/libmaple_types.h> +#include <libmaple/timer.h> + +#include <wirish/boards.h> + +void pwmWrite(uint8 pin, uint16 duty_cycle) { + if (pin >= BOARD_NR_GPIO_PINS) { + return; + } + 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); +} |