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circuitpython/shared-module/is31fl3741/IS31FL3741.c

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/*
* 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/microcontroller/Pin.h"
#include "shared-bindings/microcontroller/__init__.h"
#include "shared-bindings/util.h"
#include "shared-module/framebufferio/FramebufferDisplay.h"
#include "shared-bindings/busio/I2C.h"
void common_hal_is31fl3741_IS31FL3741_construct(is31fl3741_IS31FL3741_obj_t *self, int width, int height, mp_obj_t framebuffer, busio_i2c_obj_t *i2c, uint8_t addr, mp_obj_t mapping) {
self->width = width;
self->height = height;
self->bufsize = sizeof(uint32_t) * width * height;
// Probe the bus to see if a device acknowledges the given address.
if (!common_hal_busio_i2c_probe(i2c, addr)) {
self->base.type = &mp_type_NoneType;
mp_raise_ValueError_varg(translate("Unable to find I2C Display at %x"), addr);
}
self->i2c = i2c;
self->device_address = addr;
common_hal_busio_i2c_never_reset(self->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->i2c);
mp_obj_t *items;
size_t len;
mp_obj_list_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_IS31FL3741_reconstruct(self, framebuffer);
}
void common_hal_is31fl3741_IS31FL3741_reconstruct(is31fl3741_IS31FL3741_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_displayio_is31fl3741_begin_transaction(self);
uint8_t command = 0xFC; // device ID
common_hal_busio_i2c_write(self->i2c, self->device_address, &command, 1, false);
uint8_t data = 0;
common_hal_busio_i2c_read(self->i2c, self->device_address, &data, 1);
is31fl3741_send_reset(self->i2c, self->device_address);
is31fl3741_send_enable(self->i2c, self->device_address);
is31fl3741_set_current(self->i2c, self->device_address, 0xFF);
// set scale (brightness) to max for all LEDs
for (int i; i < 351; i++) {
is31fl3741_set_led(self->i2c, self->device_address, i, 0xFF, 2);
}
common_hal_displayio_is31fl3741_end_transaction(self);
self->paused = 0;
}
void common_hal_is31fl3741_IS31FL3741_deinit(is31fl3741_IS31FL3741_obj_t *self) {
common_hal_displayio_is31fl3741_end_transaction(self); // in case we still had a lock
if (self->i2c == &self->inline_i2c) {
common_hal_busio_i2c_deinit(self->i2c);
self->i2c = NULL;
}
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_IS31FL3741_set_paused(is31fl3741_IS31FL3741_obj_t *self, bool paused) {
self->paused = paused;
}
bool common_hal_is31fl3741_IS31FL3741_get_paused(is31fl3741_IS31FL3741_obj_t *self) {
return self->paused;
}
void common_hal_is31fl3741_IS31FL3741_set_global_current(is31fl3741_IS31FL3741_obj_t *self, uint8_t current) {
common_hal_displayio_is31fl3741_begin_transaction(self);
is31fl3741_set_current(self->i2c, self->device_address, current);
common_hal_displayio_is31fl3741_end_transaction(self);
}
uint8_t common_hal_is31fl3741_IS31FL3741_get_global_current(is31fl3741_IS31FL3741_obj_t *self) {
common_hal_displayio_is31fl3741_begin_transaction(self);
uint8_t current = is31fl3741_get_current(self->i2c, self->device_address);
common_hal_displayio_is31fl3741_end_transaction(self);
return current;
}
void common_hal_is31fl3741_IS31FL3741_refresh(is31fl3741_IS31FL3741_obj_t *self, uint8_t *dirtyrows) {
common_hal_displayio_is31fl3741_begin_transaction(self);
if (!self->paused) {
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;
}
is31fl3741_draw_pixel(self->i2c, self->device_address, 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) {
uint32_t color = 0;
if (self->auto_gamma) {
color = IS31GammaTable[((*buffer) >> 16 & 0xFF)] +
IS31GammaTable[((*buffer) >> 8 & 0xFF)] +
IS31GammaTable[((*buffer) & 0xFF)];
} else {
color = *buffer;
}
for (int x = 0; x < self->width; x++) {
is31fl3741_draw_pixel(self->i2c, self->device_address, x, y, color, self->mapping);
buffer++;
}
}
}
}
}
common_hal_displayio_is31fl3741_end_transaction(self);
}
int common_hal_is31fl3741_IS31FL3741_get_width(is31fl3741_IS31FL3741_obj_t *self) {
return self->width;
}
int common_hal_is31fl3741_IS31FL3741_get_height(is31fl3741_IS31FL3741_obj_t *self) {
return self->height;
}
void common_hal_displayio_is31fl3741_begin_transaction(is31fl3741_IS31FL3741_obj_t *self) {
while (!common_hal_busio_i2c_try_lock(self->i2c)) {
RUN_BACKGROUND_TASKS;
if (mp_hal_is_interrupted()) {
break;
}
}
}
void common_hal_displayio_is31fl3741_end_transaction(is31fl3741_IS31FL3741_obj_t *self) {
common_hal_busio_i2c_unlock(self->i2c);
}
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_IS31FL3741_collect_ptrs(is31fl3741_IS31FL3741_obj_t *self) {
gc_collect_ptr(self->framebuffer);
gc_collect_ptr(self->mapping);
}
// The following are routines to manipulate the IS31FL3741 chip
// They are not meant to be called by user code but only used
// internally.
uint8_t cur_page = 99; // set to invalid page to start
void is31fl3741_send_unlock(busio_i2c_obj_t *i2c, uint8_t addr) {
uint8_t unlock[2] = { 0xFE, 0xC5 }; // unlock command
common_hal_busio_i2c_write(i2c, addr, unlock, 2, true);
}
void is31fl3741_set_page(busio_i2c_obj_t *i2c, uint8_t addr, uint8_t p) {
if (p == cur_page) {
return;
}
cur_page = p;
is31fl3741_send_unlock(i2c, addr);
uint8_t page[2] = { 0xFD, 0x00 }; // page command
page[1] = p;
common_hal_busio_i2c_write(i2c, addr, page, 2, true);
}
void is31fl3741_send_enable(busio_i2c_obj_t *i2c, uint8_t addr) {
is31fl3741_set_page(i2c, addr, 4);
uint8_t enable[2] = { 0x00, 0x01 }; // enable command
common_hal_busio_i2c_write(i2c, addr, enable, 2, true);
}
void is31fl3741_send_reset(busio_i2c_obj_t *i2c, uint8_t addr) {
is31fl3741_set_page(i2c, addr, 4);
uint8_t rst[2] = { 0x3F, 0xAE }; // reset command
common_hal_busio_i2c_write(i2c, addr, rst, 2, true);
}
void is31fl3741_set_current(busio_i2c_obj_t *i2c, uint8_t addr, uint8_t current) {
is31fl3741_set_page(i2c, addr, 4);
uint8_t gcur[2] = { 0x01, 0x00 }; // global current command
gcur[1] = current;
common_hal_busio_i2c_write(i2c, addr, gcur, 2, true);
}
uint8_t is31fl3741_get_current(busio_i2c_obj_t *i2c, uint8_t addr) {
is31fl3741_set_page(i2c, addr, 4);
uint8_t gcur = 0x01; // global current command
common_hal_busio_i2c_write(i2c, addr, &gcur, 1, true);
uint8_t data = 0;
common_hal_busio_i2c_read(i2c, addr, &data, 1);
return data;
}
void is31fl3741_set_led(busio_i2c_obj_t *i2c, uint8_t addr, uint16_t led, uint8_t level, uint8_t page) {
uint8_t cmd[2] = { 0x00, 0x00 };
if (led < 180) {
is31fl3741_set_page(i2c, addr, page);
cmd[0] = (uint8_t)led;
} else {
is31fl3741_set_page(i2c, addr, page + 1);
cmd[0] = (uint8_t)(led - 180);
}
cmd[1] = level;
common_hal_busio_i2c_write(i2c, addr, cmd, 2, true);
}
void is31fl3741_draw_pixel(busio_i2c_obj_t *i2c, uint8_t addr, int16_t x, int16_t y, uint32_t color, uint16_t *mapping) {
uint8_t r = color >> 16 & 0xFF;
uint8_t g = color >> 8 & 0xFF;
uint8_t b = color & 0xFF;
int16_t x1 = (x * 5 + y) * 3;
uint16_t ridx = mapping[x1 + 2];
if (ridx != 65535) {
uint16_t gidx = mapping[x1 + 1];
uint16_t bidx = mapping[x1 + 0];
is31fl3741_set_led(i2c, addr, ridx, r, 0);
is31fl3741_set_led(i2c, addr, gidx, g, 0);
is31fl3741_set_led(i2c, addr, bidx, b, 0);
}
}
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