Switch to i2c init string for espressif lcd ev, expose values via board

Author: jepler

ports/espressif/boards/adafruit_qualia_s3_rgb666/pins.c

@@ -73,9 +73,8 @@ MP_DEFINE_CONST_DICT(tft_dict, tft_table);
 STATIC const mp_rom_map_elem_t board_module_globals_table[] = {
     CIRCUITPYTHON_BOARD_DICT_STANDARD_ITEMS
 
-    { MP_ROM_QSTR(MP_QSTR_TFT), MP_ROM_PTR(&tft_dict) },
+    { MP_ROM_QSTR(MP_QSTR_TFT_PINS), MP_ROM_PTR(&tft_dict) },
     { MP_ROM_QSTR(MP_QSTR_TFT_IO_EXPANDER), MP_ROM_PTR(&tft_io_expander_dict) },
-
     { MP_ROM_QSTR(MP_QSTR_NEOPIXEL), MP_ROM_PTR(MICROPY_HW_NEOPIXEL) },
 
     { MP_ROM_QSTR(MP_QSTR_TX), MP_ROM_PTR(&pin_GPIO43) },

ports/espressif/boards/espressif_esp32s3_lcd_ev/board.c

@@ -33,6 +33,9 @@
 #include "shared-bindings/framebufferio/FramebufferDisplay.h"
 #include "shared-bindings/microcontroller/Pin.h"
 #include "shared-module/displayio/__init__.h"
+#include "boards/espressif_esp32s3_lcd_ev/board.h"
+
+#define MP_DEFINE_BYTES_OBJ(obj_name, bin) mp_obj_str_t obj_name = {{&mp_type_bytes}, 0, sizeof(bin) - 1, (const byte *)bin}
 
 static const uint8_t display_init_sequence[] = {
     0xf0, 5, 0x55, 0xaa, 0x52, 0x08, 0x00,
@@ -80,8 +83,17 @@ static const uint8_t display_init_sequence[] = {
     0x3a, 1, 0x66,
     0x3a, 1, 0x66,
     0x11, 0x80, 120,
-    0x29, 0x0
+    0x29, 0x0,
+    0, // trailing NUL for Python bytes() representation
+};
+MP_DEFINE_BYTES_OBJ(display_init_byte_obj, display_init_sequence);
+
+static const char i2c_bus_init_sequence[] = {
+    2, 3, 0xf1, // set GPIO direction
+    2, 2, 0, // disable all output inversion
+    0, // trailing NUL for Python bytes() representation
 };
+MP_DEFINE_BYTES_OBJ(i2c_init_byte_obj, i2c_bus_init_sequence);
 
 static const mcu_pin_obj_t *red_pins[] = {
     &pin_GPIO1, &pin_GPIO2, &pin_GPIO42, &pin_GPIO41, &pin_GPIO40
@@ -103,7 +115,7 @@ void board_init(void) {
         /* hsync */ &pin_GPIO46,
         /* dclk */ &pin_GPIO9,
         /* data */ red_pins, MP_ARRAY_SIZE(red_pins), green_pins, MP_ARRAY_SIZE(green_pins), blue_pins, MP_ARRAY_SIZE(blue_pins),
-        /* frequency */ 6500000,
+        /* frequency */ 12000000,
         /* width x height */ 480, 480,
         /* horizontal: pulse, back &  front porch, idle */ 13, 20, 40, false,
         /* vertical: pulse, back &  front porch, idle */ 15, 20, 40, false,
@@ -127,20 +139,6 @@ void board_init(void) {
     common_hal_busio_i2c_construct(&i2c, DEFAULT_I2C_BUS_SCL, DEFAULT_I2C_BUS_SDA, 400000, 255);
     const int i2c_device_address = 32;
 
-    common_hal_busio_i2c_try_lock(&i2c);
-
-    {
-        uint8_t buf[2] = {3, 0xf1}; // set GPIO direction
-        common_hal_busio_i2c_write(&i2c, i2c_device_address, buf, sizeof(buf));
-    }
-
-    {
-        uint8_t buf[2] = {2, 0}; // set all output pins low initially
-        common_hal_busio_i2c_write(&i2c, i2c_device_address, buf, sizeof(buf));
-    }
-
-    common_hal_busio_i2c_unlock(&i2c);
-
     dotclockframebuffer_ioexpander_spi_bus spibus = {
         .bus = &i2c,
         .i2c_device_address = i2c_device_address,
@@ -151,7 +149,9 @@ void board_init(void) {
             .clk_mask = 0x100 << 2,
     };
 
-    dotclockframebuffer_ioexpander_send_init_sequence(&spibus, display_init_sequence, sizeof(display_init_sequence));
+    static const mp_buffer_info_t bufinfo_display_init = { (void *)display_init_sequence, sizeof(display_init_sequence) - 1 };
+    static const mp_buffer_info_t bufinfo_i2c_bus_init = { (void *)i2c_bus_init_sequence, sizeof(i2c_bus_init_sequence) - 1 };
+    dotclockframebuffer_ioexpander_send_init_sequence(&spibus, &bufinfo_i2c_bus_init, &bufinfo_display_init);
 
     common_hal_busio_i2c_deinit(&i2c);
 }

ports/espressif/boards/espressif_esp32s3_lcd_ev/board.h

@@ -0,0 +1,31 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2023 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.
+ */
+
+#pragma once
+
+#include "py/objstr.h"
+
+extern mp_obj_str_t display_init_byte_obj, i2c_init_byte_obj;

ports/espressif/boards/espressif_esp32s3_lcd_ev/pins.c

@@ -1,7 +1,20 @@
 #include "py/objtuple.h"
+#include "boards/espressif_esp32s3_lcd_ev/board.h"
 #include "shared-bindings/board/__init__.h"
 #include "shared-module/displayio/__init__.h"
 
+STATIC const mp_rom_map_elem_t tft_io_expander_table[] = {
+    { MP_ROM_QSTR(MP_QSTR_i2c_address), MP_ROM_INT(0x20)},
+    { MP_ROM_QSTR(MP_QSTR_gpio_address), MP_ROM_INT(1)},
+    { MP_ROM_QSTR(MP_QSTR_gpio_data_len), MP_ROM_INT(1)},
+    { MP_ROM_QSTR(MP_QSTR_gpio_data), MP_ROM_INT(0xF1)},
+    { MP_ROM_QSTR(MP_QSTR_cs_bit), MP_ROM_INT(1)},
+    { MP_ROM_QSTR(MP_QSTR_mosi_bit), MP_ROM_INT(3)},
+    { MP_ROM_QSTR(MP_QSTR_clk_bit), MP_ROM_INT(2)},
+    { MP_ROM_QSTR(MP_QSTR_i2c_init_sequence), &i2c_init_byte_obj},
+};
+MP_DEFINE_CONST_DICT(tft_io_expander_dict, tft_io_expander_table);
+
 STATIC const mp_rom_obj_tuple_t tft_r_pins = {
     {&mp_type_tuple},
     5,
@@ -73,6 +86,8 @@ STATIC const mp_rom_map_elem_t board_module_globals_table[] = {
 
     { MP_ROM_QSTR(MP_QSTR_TFT_PINS), MP_ROM_PTR(&tft_pins_dict) },
     { MP_ROM_QSTR(MP_QSTR_TFT_TIMINGS), MP_ROM_PTR(&tft_timings_dict) },
+    { MP_ROM_QSTR(MP_QSTR_TFT_IO_EXPANDER), MP_ROM_PTR(&tft_io_expander_dict) },
+    { MP_ROM_QSTR(MP_QSTR_TFT_INIT_SEQUENCE), &display_init_byte_obj},
 
     { MP_ROM_QSTR(MP_QSTR_I2S_SCK), MP_ROM_PTR(&pin_GPIO16) },
     { MP_ROM_QSTR(MP_QSTR_I2S_MCLK), MP_ROM_PTR(&pin_GPIO5) },