diff options
Diffstat (limited to 'circuitpython/shared-module/is31fl3741/FrameBuffer.c')
| -rw-r--r-- | circuitpython/shared-module/is31fl3741/FrameBuffer.c | 227 |
1 files changed, 227 insertions, 0 deletions
diff --git a/circuitpython/shared-module/is31fl3741/FrameBuffer.c b/circuitpython/shared-module/is31fl3741/FrameBuffer.c new file mode 100644 index 0000000..400f6f8 --- /dev/null +++ b/circuitpython/shared-module/is31fl3741/FrameBuffer.c @@ -0,0 +1,227 @@ +/* + * This file is part of the Micro Python project, http://micropython.org/ + * + * The MIT License (MIT) + * + * Copyright (c) 2021 Mark Komus + * + * 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> + +#include "py/gc.h" +#include "py/obj.h" +#include "py/objarray.h" +#include "py/objproperty.h" +#include "py/runtime.h" + +#include "shared-module/is31fl3741/allocator.h" +#include "shared-bindings/is31fl3741/IS31FL3741.h" +#include "shared-bindings/is31fl3741/FrameBuffer.h" +#include "shared-bindings/util.h" +#include "shared-module/framebufferio/FramebufferDisplay.h" +#include "shared-bindings/busio/I2C.h" + +void common_hal_is31fl3741_FrameBuffer_construct(is31fl3741_FrameBuffer_obj_t *self, int width, int height, mp_obj_t framebuffer, is31fl3741_IS31FL3741_obj_t *is31, mp_obj_t mapping) { + self->width = width; + self->height = height; + + self->bufsize = sizeof(uint32_t) * width * height; + + self->is31fl3741 = is31; + + common_hal_busio_i2c_never_reset(self->is31fl3741->i2c); + // Our object is statically allocated off the heap so make sure the bus object lives to the end + // of the heap as well. + gc_never_free(self->is31fl3741->i2c); + gc_never_free(self->is31fl3741); + + mp_obj_t *items; + size_t len; + mp_obj_tuple_get(mapping, &len, &items); + + if (len != (size_t)(self->scale_width * self->scale_height * 3)) { + mp_raise_ValueError(translate("LED mappings must match display size")); + } + + self->mapping = common_hal_is31fl3741_allocator_impl(sizeof(uint16_t) * len); + for (size_t i = 0; i < len; i++) { + mp_int_t value = mp_obj_get_int(items[i]); + // We only store up to 16 bits + if (value > 0xFFFF) { + value = 0xFFFF; + } + self->mapping[i] = (uint16_t)value; + } + + common_hal_is31fl3741_FrameBuffer_reconstruct(self, framebuffer); +} + +void common_hal_is31fl3741_FrameBuffer_reconstruct(is31fl3741_FrameBuffer_obj_t *self, mp_obj_t framebuffer) { + self->paused = 1; + + if (framebuffer) { + self->framebuffer = framebuffer; + mp_get_buffer_raise(self->framebuffer, &self->bufinfo, MP_BUFFER_READ); + if (mp_get_buffer(self->framebuffer, &self->bufinfo, MP_BUFFER_RW)) { + self->bufinfo.typecode = 'H' | MP_OBJ_ARRAY_TYPECODE_FLAG_RW; + } else { + self->bufinfo.typecode = 'H'; + } + + // verify that the matrix is big enough + mp_get_index(mp_obj_get_type(self->framebuffer), self->bufinfo.len, MP_OBJ_NEW_SMALL_INT(self->bufsize - 1), false); + } else { + common_hal_is31fl3741_free_impl(self->bufinfo.buf); + + self->framebuffer = NULL; + self->bufinfo.buf = common_hal_is31fl3741_allocator_impl(self->bufsize); + self->bufinfo.len = self->bufsize; + self->bufinfo.typecode = 'H' | MP_OBJ_ARRAY_TYPECODE_FLAG_RW; + } + + common_hal_is31fl3741_begin_transaction(self->is31fl3741); + common_hal_is31fl3741_send_reset(self->is31fl3741); + common_hal_is31fl3741_set_current(self->is31fl3741, 0xFE); + + // set scale (brightness) to max for all LEDs + for (int i = 0; i < 351; i++) { + common_hal_is31fl3741_set_led(self->is31fl3741, i, 0xFF, 2); + } + + common_hal_is31fl3741_send_enable(self->is31fl3741); + common_hal_is31fl3741_end_transaction(self->is31fl3741); + + self->paused = 0; +} + +void common_hal_is31fl3741_FrameBuffer_deinit(is31fl3741_FrameBuffer_obj_t *self) { + common_hal_is31fl3741_end_transaction(self->is31fl3741); // in case we still had a lock + + common_hal_is31fl3741_IS31FL3741_deinit(self->is31fl3741); + + if (self->mapping != 0) { + common_hal_is31fl3741_free_impl(self->mapping); + self->mapping = 0; + } + + self->base.type = NULL; + + // If a framebuffer was passed in to the constructor, NULL the reference + // here so that it will become GC'able + self->framebuffer = NULL; +} + +void common_hal_is31fl3741_FrameBuffer_set_paused(is31fl3741_FrameBuffer_obj_t *self, bool paused) { + self->paused = paused; +} + +bool common_hal_is31fl3741_FrameBuffer_get_paused(is31fl3741_FrameBuffer_obj_t *self) { + return self->paused; +} + +void common_hal_is31fl3741_FrameBuffer_refresh(is31fl3741_FrameBuffer_obj_t *self, uint8_t *dirtyrows) { + if (!self->paused) { + common_hal_is31fl3741_begin_transaction(self->is31fl3741); + + uint8_t dirty_row_flags = 0xFF; // only supports 8 rows gotta fix + + if (self->scale) { + // Based on the Arduino IS31FL3741 driver code + // dirtyrows flag current not implemented for scaled displays + uint32_t *buffer = self->bufinfo.buf; + + for (int x = 0; x < self->scale_width; x++) { + uint32_t *ptr = &buffer[x * 3]; // Entry along top scan line w/x offset + for (int y = 0; y < self->scale_height; y++) { + uint16_t rsum = 0, gsum = 0, bsum = 0; + // Inner x/y loops are row-major on purpose (less pointer math) + for (uint8_t yy = 0; yy < 3; yy++) { + for (uint8_t xx = 0; xx < 3; xx++) { + uint32_t rgb = ptr[xx]; + rsum += rgb >> 16 & 0xFF; + gsum += (rgb >> 8) & 0xFF; + bsum += rgb & 0xFF; + } + ptr += self->width; // Advance one scan line + } + rsum = rsum / 9; + gsum = gsum / 9; + bsum = bsum / 9; + uint32_t color = 0; + if (self->auto_gamma) { + color = (IS31GammaTable[rsum] << 16) + + (IS31GammaTable[gsum] << 8) + + IS31GammaTable[bsum]; + } else { + color = (rsum << 16) + (gsum << 8) + bsum; + } + common_hal_is31fl3741_draw_pixel(self->is31fl3741, x, y, color, self->mapping); + } + } + } else { + uint32_t *buffer = self->bufinfo.buf; + for (int y = 0; y < self->height; y++) { + if ((dirtyrows != 0) && ((y % 8) == 0)) { + dirty_row_flags = *dirtyrows++; + } + + if ((dirty_row_flags >> (y % 8)) & 0x1) { + for (int x = 0; x < self->width; x++) { + uint32_t color = 0; + if (self->auto_gamma) { + color = (IS31GammaTable[((*buffer) >> 16 & 0xFF)] << 16) + + (IS31GammaTable[((*buffer) >> 8 & 0xFF)] << 8) + + IS31GammaTable[((*buffer) & 0xFF)]; + } else { + color = *buffer; + } + + common_hal_is31fl3741_draw_pixel(self->is31fl3741, x, y, color, self->mapping); + buffer++; + } + } + } + } + common_hal_is31fl3741_end_transaction(self->is31fl3741); + } +} + +int common_hal_is31fl3741_FrameBuffer_get_width(is31fl3741_FrameBuffer_obj_t *self) { + return self->width; +} + +int common_hal_is31fl3741_FrameBuffer_get_height(is31fl3741_FrameBuffer_obj_t *self) { + return self->height; +} + +void *common_hal_is31fl3741_allocator_impl(size_t sz) { + supervisor_allocation *allocation = allocate_memory(align32_size(sz), false, true); + return allocation ? allocation->ptr : NULL; +} + +void common_hal_is31fl3741_free_impl(void *ptr_in) { + free_memory(allocation_from_ptr(ptr_in)); +} + +void is31fl3741_FrameBuffer_collect_ptrs(is31fl3741_FrameBuffer_obj_t *self) { + gc_collect_ptr(self->framebuffer); + gc_collect_ptr(self->mapping); +} |