132 lines
4.3 KiB
C
132 lines
4.3 KiB
C
/*
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* This file is part of the MicroPython 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) 2021 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 <string.h>
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#include "py/obj.h"
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#include "py/runtime.h"
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#include "common-hal/audiobusio/__init__.h"
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#include "common-hal/imagecapture/ParallelImageCapture.h"
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#include "cam.h"
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void common_hal_imagecapture_parallelimagecapture_construct(imagecapture_parallelimagecapture_obj_t *self,
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const uint8_t data_pins[],
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uint8_t data_count,
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const mcu_pin_obj_t *data_clock,
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const mcu_pin_obj_t *vertical_sync,
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const mcu_pin_obj_t *horizontal_reference) {
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// only 8 bits is supported at present
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if (data_count < 8 || data_count > 16) {
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mp_raise_ValueError_varg(translate("%q must be between %d and %d"), MP_QSTR_data_count, 8, 16);
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}
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// This will throw if unsuccessful. Everything following is guaranteed to succeed.
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port_i2s_allocate_i2s0();
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claim_pin(data_clock);
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claim_pin(vertical_sync);
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claim_pin(horizontal_reference);
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self->data_count = data_count;
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self->data_clock = data_clock->number;
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self->vertical_sync = vertical_sync->number;
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self->horizontal_reference = horizontal_reference->number;
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self->config = (cam_config_t) {
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.bit_width = data_count,
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.pin = {
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.pclk = data_clock->number,
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.vsync = vertical_sync->number,
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.hsync = horizontal_reference->number,
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},
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.vsync_invert = true,
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.hsync_invert = false,
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.size = 0,
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.max_buffer_size = 8 * 1024,
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.task_stack = 1024,
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.task_pri = configMAX_PRIORITIES
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};
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for (int i = 0; i < data_count; i++) {
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claim_pin_number(data_pins[i]);
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self->config.pin_data[i] = data_pins[i];
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}
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}
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void common_hal_imagecapture_parallelimagecapture_deinit(imagecapture_parallelimagecapture_obj_t *self) {
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reset_pin_number(self->data_clock);
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self->data_clock = NO_PIN;
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reset_pin_number(self->vertical_sync);
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self->vertical_sync = NO_PIN;
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reset_pin_number(self->horizontal_reference);
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self->horizontal_reference = NO_PIN;
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for (int i = 0; i < self->data_count; i++) {
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if (self->config.pin_data[i] != NO_PIN) {
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reset_pin_number(self->config.pin_data[i]);
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self->config.pin_data[i] = NO_PIN;
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}
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}
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port_i2s_reset_instance(0);
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}
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bool common_hal_imagecapture_parallelimagecapture_deinited(imagecapture_parallelimagecapture_obj_t *self) {
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return self->data_clock == NO_PIN;
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}
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void common_hal_imagecapture_parallelimagecapture_capture(imagecapture_parallelimagecapture_obj_t *self, void *buffer, size_t bufsize) {
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size_t size = bufsize / 2; // count is in pixels
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if (size != self->config.size || buffer != self->config.frame1_buffer) {
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cam_deinit();
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self->config.size = bufsize / 2; // count is in pixels(?)
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self->config.frame1_buffer = buffer;
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cam_init(&self->config);
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} else {
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cam_give(buffer);
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}
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cam_start();
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while (!cam_ready()) {
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RUN_BACKGROUND_TASKS;
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if (mp_hal_is_interrupted()) {
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self->config.size = 0; // force re-init next time
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cam_stop();
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return;
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}
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}
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uint8_t *unused;
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cam_take(&unused); // this just "returns" buffer
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cam_stop();
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}
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