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extend board driver support for SSD1681 #9456

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Jul 24, 2024
Merged

extend board driver support for SSD1681 #9456

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64 changes: 43 additions & 21 deletions ports/raspberrypi/boards/bradanlanestudio_explorer_rp2040/board.c
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Original file line number Diff line number Diff line change
Expand Up @@ -146,32 +146,33 @@ static int _set_vid(void) {
vid_setting = value;
/*
Voltage Divider with 3.3V: (1241 * V)
10K/ 15K = 1.98V = 2458
15K/ 10K = 1.32V = 1638
15K/4.7K = 0.79V = 980
15K/ 2K = 1.32V = 482
15K/ 1K = 1.32V = 256
10K/ 15K = 1.98V = 2458 GT 2000 = TBD
15K/ 10K = 1.32V = 1638 GT 1200 = Explorer with SSD1681 BW
15K/4.7K = 0.79V = 980 GT 600 = Explorer with SSD1681 BWR
15K/ 2K = 0.39V = 482 GT 300 = Explorer with SSD1608 BW
100K/ 10K = 0.30V = 372 ditto
15K/ 1K = 0.21V = 256 GT 150 = DCNextGen with SSD1681 BWR
Note: extreme values (using 100K or greater) will not create a strong enough current for the ADC to read accurately
Note: we do not get a usable value when the voltage divider is missing
*/

// TODO change to min/max to tighten up the ranges (requires sampling of the initial boards)
if (value > 2800) {
vid_setting = 9;
vid_setting = 9; // invalid
} else if (value > 2000) {
vid_setting = 5;
vid_setting = 5; // future
} else if (value > 1200) {
vid_setting = 4;
vid_setting = 4; // Explorer SSD1681 BW
} else if (value > 600) {
vid_setting = 3;
vid_setting = 3; // Explorer SSD1681 BWR
} else if (value > 300) {
vid_setting = 2;
vid_setting = 2; // Explorer SSD1608 BW
} else if (value > 150) {
vid_setting = 1;
vid_setting = 1; // DCNextGen SSD1681 BWR
} else {
vid_setting = 0;
}
vid_setting = 0; // invalid

}
return vid_setting;
}

Expand Down Expand Up @@ -227,8 +228,29 @@ void board_init(void) {
display = &allocate_display()->epaper_display;
display->base.type = &epaperdisplay_epaperdisplay_type;

// VID codes: 1 = tricolor ePaper (BWR), 2 = monochrome ePaper (BW), other codes are TBD
// default to no rotation
int rotation = 0;
if (vid_setting == 1) {
// DCNextGen SSD1681 BWR rotated 270
rotation = 270;
}

// default to BWR refresh rates
float refresh_time = 15.0;
float seconds_per_frame = 20.0;
if ((vid_setting == 2) || (vid_setting == 4)) {
// BW displays have faster refresh rates
refresh_time = 1.0;
seconds_per_frame = 5.0;
}

// VID 1, 3, and 4 = SSD1681 display driver
// VID 2 = SSD1608 display driver

// VID codes: see above
if ((vid_setting == 1) || // DCNextGen SSD1681 BWR rotated 270
(vid_setting == 3) || // Explorer SSD1681 BW rotated 0
(vid_setting == 4)) { // Explorer SSD1681 BWR rotated 0
common_hal_epaperdisplay_epaperdisplay_construct(
display,
bus,
Expand All @@ -241,7 +263,7 @@ void board_init(void) {
HEIGHT + 0x60, // ram_height RAM is actually only 200 bits high but we use 296 to match the 9 bits
0, // colstart
0, // rowstart
270, // rotation
rotation, // rotation
SSD_SET_RAMXPOS, // set_column_window_command
SSD_SET_RAMYPOS, // set_row_window_command
SSD_SET_RAMXCOUNT, // set_current_column_command
Expand All @@ -252,16 +274,16 @@ void board_init(void) {
false, // color_bits_inverted
0xFF0000, // highlight_color (RED for tri-color display)
_refresh_sequence_ssd1681, sizeof(_refresh_sequence_ssd1681), // refresh_display_command
15.0, // refresh_time
refresh_time, // refresh_time
&pin_GPIO9, // DEFAULT_SPI_BUS_BUSY, // busy_pin
true, // busy_state
20.0, // seconds_per_frame (does not seem the user can change this)
seconds_per_frame, // seconds_per_frame (does not seem the user can change this)
true, // always_toggle_chip_select
false, // not grayscale
false, // not acep
false, // not two_byte_sequence_length
true); // address_little_endian
} else if (vid_setting == 2) {
} else if (vid_setting == 2) { // Explorer SSD1608 BW
common_hal_epaperdisplay_epaperdisplay_construct(
display,
bus,
Expand All @@ -274,7 +296,7 @@ void board_init(void) {
HEIGHT /* + 0x60 */, // ram_height RAM is actually only 200 bits high but we use 296 to match the 9 bits
0, // colstart
0, // rowstart
0, // rotation
rotation, // rotation
SSD_SET_RAMXPOS, // set_column_window_command
SSD_SET_RAMYPOS, // set_row_window_command
SSD_SET_RAMXCOUNT, // set_current_column_command
Expand All @@ -285,10 +307,10 @@ void board_init(void) {
false, // color_bits_inverted
0x000000, // highlight_color (RED for tri-color display)
_refresh_sequence_ssd1608, sizeof(_refresh_sequence_ssd1608), // refresh_display_command
1.0, // refresh_time
refresh_time, // refresh_time
&pin_GPIO9, // DEFAULT_SPI_BUS_BUSY, // busy_pin
true, // busy_state
5.0, // seconds_per_frame (does not seem the user can change this)
seconds_per_frame, // seconds_per_frame (does not seem the user can change this)
true, // always_toggle_chip_select
false, // not grayscale
false, // not acep
Expand Down