circuitpython/ports/esp32s2/common-hal/imagecapture/ParallelImageCapture.c

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