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sharpdisplay
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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2020 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>
#include
"py/gc.h"
#include
"shared-bindings/board/__init__.h"
#include
"shared-bindings/microcontroller/Pin.h"
#include
"shared-bindings/sharpdisplay/SharpMemoryFramebuffer.h"
#include
"shared-module/sharpdisplay/SharpMemoryFramebuffer.h"
#include
"supervisor/memory.h"
#define
SHARPMEM_BIT_WRITECMD_LSB
(0x80)
#define
JDI_BIT_WRITECMD_LSB
(0x90)
#define
SHARPMEM_BIT_VCOM_LSB
(0x40)
STATIC
uint8_t
bitrev
(
uint8_t
n
) {
uint8_t
r
=
0
;
for
(
int
i
=
0
;
i
<
8
;
i
++
) {
r
|= ((
n
>>
i
)
&
1
) << (
7
-
i
);
}
return
r
;
}
int
common_hal_sharpdisplay_framebuffer_get_width
(
sharpdisplay_framebuffer_obj_t
*
self
) {
return
self
->
width
;
}
int
common_hal_sharpdisplay_framebuffer_get_height
(
sharpdisplay_framebuffer_obj_t
*
self
) {
return
self
->
height
;
}
STATIC
int
common_hal_sharpdisplay_framebuffer_get_row_stride
(
sharpdisplay_framebuffer_obj_t
*
self
) {
if
(
self
->
jdi_display
) {
return
(
self
->
width
+
1
) /
2
+
2
;
}
else
{
return
(
self
->
width
+
7
) /
8
+
2
;
}
}
STATIC
int
common_hal_sharpdisplay_framebuffer_get_first_pixel_offset
(
sharpdisplay_framebuffer_obj_t
*
self
) {
return
2
;
}
STATIC
bool
common_hal_sharpdisplay_framebuffer_get_reverse_pixels_in_byte
(
sharpdisplay_framebuffer_obj_t
*
self
) {
return
true;
}
STATIC
bool
common_hal_sharpdisplay_framebuffer_get_pixels_in_byte_share_row
(
sharpdisplay_framebuffer_obj_t
*
self
) {
return
true;
}
void
common_hal_sharpdisplay_framebuffer_reset
(
sharpdisplay_framebuffer_obj_t
*
self
) {
if
(
self
->
bus
!=
&
self
->
inline_bus
#if
CIRCUITPY_BOARD_SPI
&&
!
common_hal_board_is_spi
(
self
->
bus
)
#endif
) {
memcpy
(
&
self
->
inline_bus
,
self
->
bus
,
sizeof
(
busio_spi_obj_t
));
self
->
bus
=
&
self
->
inline_bus
;
}
}
void
common_hal_sharpdisplay_framebuffer_reconstruct
(
sharpdisplay_framebuffer_obj_t
*
self
) {
// Look up the allocation by the old pointer and get the new pointer from it.
supervisor_allocation
*
alloc
=
allocation_from_ptr
(
self
->
bufinfo
.
buf
);
self
->
bufinfo
.
buf
=
alloc
?
alloc
->
ptr
:
NULL
;
}
void
common_hal_sharpdisplay_framebuffer_get_bufinfo
(
sharpdisplay_framebuffer_obj_t
*
self
,
mp_buffer_info_t
*
bufinfo
) {
if
(!
self
->
bufinfo
.
buf
) {
int
row_stride
=
common_hal_sharpdisplay_framebuffer_get_row_stride
(
self
);
int
height
=
common_hal_sharpdisplay_framebuffer_get_height
(
self
);
self
->
bufinfo
.
len
=
row_stride
*
height
+
2
;
supervisor_allocation
*
alloc
=
allocate_memory
(
align32_size
(
self
->
bufinfo
.
len
), false, true);
if
(
alloc
==
NULL
) {
m_malloc_fail
(
self
->
bufinfo
.
len
);
}
self
->
bufinfo
.
buf
=
alloc
->
ptr
;
memset
(
alloc
->
ptr
,
0
,
self
->
bufinfo
.
len
);
uint8_t
*
data
=
self
->
bufinfo
.
buf
;
if
(
self
->
jdi_display
) {
*
data
++
=
JDI_BIT_WRITECMD_LSB
;
}
else
{
*
data
++
=
SHARPMEM_BIT_WRITECMD_LSB
;
}
for
(
int
y
=
0
;
y
<
height
;
y
++
) {
if
(
self
->
jdi_display
) {
*
data
=
y
+
1
;
}
else
{
*
data
=
bitrev
(
y
+
1
);
}
data
+=
row_stride
;
}
self
->
full_refresh
=
true;
}
if
(
bufinfo
) {
*
bufinfo
=
self
->
bufinfo
;
}
}
void
common_hal_sharpdisplay_framebuffer_deinit
(
sharpdisplay_framebuffer_obj_t
*
self
) {
if
(
self
->
base
.
type
!=
&
sharpdisplay_framebuffer_type
) {
return
;
}
if
(
self
->
bus
==
&
self
->
inline_bus
) {
common_hal_busio_spi_deinit
(
self
->
bus
);
}
common_hal_reset_pin
(
self
->
chip_select
.
pin
);
free_memory
(
allocation_from_ptr
(
self
->
bufinfo
.
buf
));
memset
(
self
,
0
,
sizeof
(
*
self
));
}
void
common_hal_sharpdisplay_framebuffer_construct
(
sharpdisplay_framebuffer_obj_t
*
self
,
busio_spi_obj_t
*
spi
,
const
mcu_pin_obj_t
*
chip_select
,
int
baudrate
,
int
width
,
int
height
,
bool
jdi_display
) {
common_hal_digitalio_digitalinout_construct
(
&
self
->
chip_select
,
chip_select
);
common_hal_digitalio_digitalinout_switch_to_output
(
&
self
->
chip_select
, true,
DRIVE_MODE_PUSH_PULL
);
common_hal_never_reset_pin
(
chip_select
);
self
->
bus
=
spi
;
common_hal_busio_spi_never_reset
(
self
->
bus
);
self
->
width
=
width
;
self
->
height
=
height
;
self
->
baudrate
=
baudrate
;
self
->
jdi_display
=
jdi_display
;
common_hal_sharpdisplay_framebuffer_get_bufinfo
(
self
,
NULL
);
}
STATIC
void
common_hal_sharpdisplay_framebuffer_swapbuffers
(
sharpdisplay_framebuffer_obj_t
*
self
,
uint8_t
*
dirty_row_bitmask
) {
// claim SPI bus
if
(!
common_hal_busio_spi_try_lock
(
self
->
bus
)) {
return
;
}
common_hal_busio_spi_configure
(
self
->
bus
,
self
->
baudrate
,
0
,
0
,
8
);
// set chip select high
common_hal_digitalio_digitalinout_set_value
(
&
self
->
chip_select
, true);
// output the toggling signal
uint8_t
*
data
=
self
->
bufinfo
.
buf
;
data
[
0
] ^=
SHARPMEM_BIT_VCOM_LSB
;
common_hal_busio_spi_write
(
self
->
bus
,
data
++
,
1
);
// output each changed row
size_t
row_stride
=
common_hal_sharpdisplay_framebuffer_get_row_stride
(
self
);
for
(
int
y
=
0
;
y
<
self
->
height
;
y
++
) {
if
(
self
->
full_refresh
||
(
dirty_row_bitmask
[
y
/
8
]
&
(
1
<< (
y
&
7
)))) {
common_hal_busio_spi_write
(
self
->
bus
,
data
,
row_stride
);
}
data
+=
row_stride
;
}
// output a trailing zero
uint8_t
zero
[
2
]
=
{
0
,
0
};
common_hal_busio_spi_write
(
self
->
bus
,
zero
,
self
->
jdi_display
?
2
:
1
);
// set chip select low
common_hal_digitalio_digitalinout_set_value
(
&
self
->
chip_select
, false);
// release SPI bus
common_hal_busio_spi_unlock
(
self
->
bus
);
self
->
full_refresh
=
false;
}
STATIC
void
sharpdisplay_framebuffer_deinit
(
mp_obj_t
self_in
) {
sharpdisplay_framebuffer_obj_t
*
self
=
self_in
;
common_hal_sharpdisplay_framebuffer_deinit
(
self
);
}
STATIC
void
sharpdisplay_framebuffer_get_bufinfo
(
mp_obj_t
self_in
,
mp_buffer_info_t
*
bufinfo
) {
sharpdisplay_framebuffer_obj_t
*
self
=
self_in
;
common_hal_sharpdisplay_framebuffer_get_bufinfo
(
self
,
bufinfo
);
}
STATIC
int
sharpdisplay_framebuffer_get_color_depth
(
mp_obj_t
self_in
) {
sharpdisplay_framebuffer_obj_t
*
self
=
MP_OBJ_TO_PTR
(
self_in
);
return
self
->
jdi_display
?
4
:
1
;
}
STATIC
bool
sharpdisplay_framebuffer_get_grayscale
(
mp_obj_t
self_in
) {
sharpdisplay_framebuffer_obj_t
*
self
=
MP_OBJ_TO_PTR
(
self_in
);
return
!
self
->
jdi_display
;
}
STATIC
int
sharpdisplay_framebuffer_get_height
(
mp_obj_t
self_in
) {
sharpdisplay_framebuffer_obj_t
*
self
=
self_in
;
return
common_hal_sharpdisplay_framebuffer_get_height
(
self
);
}
STATIC
int
sharpdisplay_framebuffer_get_width
(
mp_obj_t
self_in
) {
sharpdisplay_framebuffer_obj_t
*
self
=
self_in
;
return
common_hal_sharpdisplay_framebuffer_get_width
(
self
);
}
STATIC
int
sharpdisplay_framebuffer_get_first_pixel_offset
(
mp_obj_t
self_in
) {
sharpdisplay_framebuffer_obj_t
*
self
=
self_in
;
return
common_hal_sharpdisplay_framebuffer_get_first_pixel_offset
(
self
);
}
STATIC
bool
sharpdisplay_framebuffer_get_pixels_in_byte_share_row
(
mp_obj_t
self_in
) {
sharpdisplay_framebuffer_obj_t
*
self
=
self_in
;
return
common_hal_sharpdisplay_framebuffer_get_pixels_in_byte_share_row
(
self
);
}
STATIC
bool
sharpdisplay_framebuffer_get_reverse_pixels_in_byte
(
mp_obj_t
self_in
) {
sharpdisplay_framebuffer_obj_t
*
self
=
self_in
;
return
common_hal_sharpdisplay_framebuffer_get_reverse_pixels_in_byte
(
self
);
}
STATIC
int
sharpdisplay_framebuffer_get_row_stride
(
mp_obj_t
self_in
) {
sharpdisplay_framebuffer_obj_t
*
self
=
self_in
;
return
common_hal_sharpdisplay_framebuffer_get_row_stride
(
self
);
}
STATIC
void
sharpdisplay_framebuffer_swapbuffers
(
mp_obj_t
self_in
,
uint8_t
*
dirty_row_bitmask
) {
sharpdisplay_framebuffer_obj_t
*
self
=
self_in
;
common_hal_sharpdisplay_framebuffer_swapbuffers
(
self
,
dirty_row_bitmask
);
}
const
framebuffer_p_t
sharpdisplay_framebuffer_proto
=
{
MP_PROTO_IMPLEMENT
(
MP_QSTR_protocol_framebuffer
)
.
deinit
=
sharpdisplay_framebuffer_deinit
,
.
get_bufinfo
=
sharpdisplay_framebuffer_get_bufinfo
,
.
get_color_depth
=
sharpdisplay_framebuffer_get_color_depth
,
.
get_grayscale
=
sharpdisplay_framebuffer_get_grayscale
,
.
get_height
=
sharpdisplay_framebuffer_get_height
,
.
get_width
=
sharpdisplay_framebuffer_get_width
,
.
swapbuffers
=
sharpdisplay_framebuffer_swapbuffers
,
.
get_first_pixel_offset
=
sharpdisplay_framebuffer_get_first_pixel_offset
,
.
get_pixels_in_byte_share_row
=
sharpdisplay_framebuffer_get_pixels_in_byte_share_row
,
.
get_reverse_pixels_in_byte
=
sharpdisplay_framebuffer_get_reverse_pixels_in_byte
,
.
get_row_stride
=
sharpdisplay_framebuffer_get_row_stride
,
};
void
common_hal_sharpdisplay_framebuffer_collect_ptrs
(
sharpdisplay_framebuffer_obj_t
*
self
) {
gc_collect_ptr
(
self
->
bus
);
}
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