71 lines
2.6 KiB
C
71 lines
2.6 KiB
C
/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2020 Jeff Epler for Adafruit Industries
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stddef.h>
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#include "py/mphal.h"
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#include "common-hal/rgbmatrix/RGBMatrix.h"
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#include "shared-bindings/pwmio/PWMOut.h"
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#include "shared-module/rgbmatrix/RGBMatrix.h"
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#include "src/rp2_common/hardware_pwm/include/hardware/pwm.h"
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void *common_hal_rgbmatrix_timer_allocate(rgbmatrix_rgbmatrix_obj_t *self) {
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// Choose a PWM channel based on the first RGB pin
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uint8_t slice = pwm_gpio_to_slice_num(self->rgb_pins[0]);
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uint8_t channel = pwm_gpio_to_channel(self->rgb_pins[0]);
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int result = pwmout_allocate(slice, channel, true, 125000000 / 3);
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if (result == PWMOUT_OK) {
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// return value must be nonzero (but slice and channel can both be
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// zero), so set bit 16...
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pwmout_never_reset(slice, channel);
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return (void *)(intptr_t)(slice | (channel << 8) | 0x10000);
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}
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return NULL;
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}
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void common_hal_rgbmatrix_timer_enable(void *ptr) {
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int8_t slice = ((intptr_t)ptr) & 0xff;
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pwm_set_enabled(slice, false);
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pwm_clear_irq(slice);
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pwm_set_enabled(slice, true);
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}
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void common_hal_rgbmatrix_timer_disable(void *ptr) {
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int8_t slice = ((intptr_t)ptr) & 0xff;
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pwm_set_enabled(slice, false);
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}
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void common_hal_rgbmatrix_timer_free(void *ptr) {
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intptr_t value = (intptr_t)ptr;
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uint8_t slice = value & 0xff;
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uint8_t channel = value >> 8;
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pwm_set_enabled(slice, false);
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pwmout_free(slice, channel);
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return;
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}
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