Initial support for ESP32-C3-Lyra-V2 dev board

ports/espressif/boards/espressif_esp32c3_lyra_v2/board.c

@@ -0,0 +1,9 @@
+// This file is part of the CircuitPython project: https://circuitpython.org
+//
+// SPDX-FileCopyrightText: Copyright (c) 2021 microDev
+//
+// SPDX-License-Identifier: MIT
+
+#include "supervisor/board.h"
+
+// Use the MP_WEAK supervisor/shared/board.c versions of routines not defined here.

ports/espressif/boards/espressif_esp32c3_lyra_v2/mpconfigboard.h

@@ -0,0 +1,23 @@
+// This file is part of the CircuitPython project: https://circuitpython.org
+//
+// SPDX-FileCopyrightText: Copyright (c) 2021 microDev
+//
+// SPDX-License-Identifier: MIT
+
+#pragma once
+
+// Board setup
+#define MICROPY_HW_BOARD_NAME       "ESP32-C3-Lyra-V2"
+#define MICROPY_HW_MCU_NAME         "ESP32-C3N4"
+
+// Status LED
+#define MICROPY_HW_NEOPIXEL         (&pin_GPIO10)
+#define MICROPY_HW_NEOPIXEL_COUNT   (1)
+
+// Default bus pins
+#define DEFAULT_UART_BUS_RX         (&pin_GPIO20)
+#define DEFAULT_UART_BUS_TX         (&pin_GPIO21)
+
+// Serial over UART
+#define CIRCUITPY_CONSOLE_UART_RX               DEFAULT_UART_BUS_RX
+#define CIRCUITPY_CONSOLE_UART_TX               DEFAULT_UART_BUS_TX

ports/espressif/boards/espressif_esp32c3_lyra_v2/mpconfigboard.mk

@@ -0,0 +1,14 @@
+CIRCUITPY_CREATOR_ID = 0x000C303A
+CIRCUITPY_CREATION_ID = 0x00C3A000
+
+IDF_TARGET = esp32c3
+
+CIRCUITPY_ESP_FLASH_MODE = qio
+CIRCUITPY_ESP_FLASH_FREQ = 80m
+CIRCUITPY_ESP_FLASH_SIZE = 4MB
+
+CIRCUITPY_ESP_USB_SERIAL_JTAG = 0
+
+ESPRESSIF_ESP32C3_LYRA_STATUS_LED_HOLD = 1
+
+CFLAGS += -DESPRESSIF_ESP32C3_LYRA_STATUS_LED_HOLD=$(ESPRESSIF_ESP32C3_LYRA_STATUS_LED_HOLD)

ports/espressif/boards/espressif_esp32c3_lyra_v2/pins.c

@@ -0,0 +1,41 @@
+// This file is part of the CircuitPython project: https://circuitpython.org
+//
+// SPDX-FileCopyrightText: Copyright (c) 2021 microDev
+//
+// SPDX-License-Identifier: MIT
+
+#include "shared-bindings/board/__init__.h"
+
+static const mp_rom_map_elem_t board_module_globals_table[] = {
+    CIRCUITPYTHON_BOARD_DICT_STANDARD_ITEMS
+
+    { MP_ROM_QSTR(MP_QSTR_IO0), MP_ROM_PTR(&pin_GPIO0) },
+    { MP_ROM_QSTR(MP_QSTR_IO1), MP_ROM_PTR(&pin_GPIO1) },
+    { MP_ROM_QSTR(MP_QSTR_IO2), MP_ROM_PTR(&pin_GPIO2) },
+    { MP_ROM_QSTR(MP_QSTR_IO3), MP_ROM_PTR(&pin_GPIO3) },
+    { MP_ROM_QSTR(MP_QSTR_IO4), MP_ROM_PTR(&pin_GPIO4) },
+    { MP_ROM_QSTR(MP_QSTR_IO5), MP_ROM_PTR(&pin_GPIO5) },
+    { MP_ROM_QSTR(MP_QSTR_IO6), MP_ROM_PTR(&pin_GPIO6) },
+    { MP_ROM_QSTR(MP_QSTR_IO7), MP_ROM_PTR(&pin_GPIO7) },
+    { MP_ROM_QSTR(MP_QSTR_IO8), MP_ROM_PTR(&pin_GPIO8) },
+    { MP_ROM_QSTR(MP_QSTR_IO9), MP_ROM_PTR(&pin_GPIO9) },
+    { MP_ROM_QSTR(MP_QSTR_IO10), MP_ROM_PTR(&pin_GPIO10) },
+    { MP_ROM_QSTR(MP_QSTR_IO18), MP_ROM_PTR(&pin_GPIO18) },
+    { MP_ROM_QSTR(MP_QSTR_IO19), MP_ROM_PTR(&pin_GPIO19) },
+    { MP_ROM_QSTR(MP_QSTR_IO20), MP_ROM_PTR(&pin_GPIO20) },
+    { MP_ROM_QSTR(MP_QSTR_IO21), MP_ROM_PTR(&pin_GPIO21) },
+
+    { MP_ROM_QSTR(MP_QSTR_RX), MP_ROM_PTR(&pin_GPIO20) },
+    { MP_ROM_QSTR(MP_QSTR_TX), MP_ROM_PTR(&pin_GPIO21) },
+
+    { MP_ROM_QSTR(MP_QSTR_MTMS), MP_ROM_PTR(&pin_GPIO4) },
+    { MP_ROM_QSTR(MP_QSTR_MTDI), MP_ROM_PTR(&pin_GPIO5) },
+    { MP_ROM_QSTR(MP_QSTR_MTCK), MP_ROM_PTR(&pin_GPIO6) },
+    { MP_ROM_QSTR(MP_QSTR_MTDO), MP_ROM_PTR(&pin_GPIO7) },
+
+    { MP_ROM_QSTR(MP_QSTR_BUTTON), MP_ROM_PTR(&pin_GPIO9) },
+    { MP_ROM_QSTR(MP_QSTR_NEOPIXEL), MP_ROM_PTR(&pin_GPIO10) },
+
+    { MP_ROM_QSTR(MP_QSTR_UART), MP_ROM_PTR(&board_uart_obj) },
+};
+MP_DEFINE_CONST_DICT(board_module_globals, board_module_globals_table);

ports/espressif/common-hal/neopixel_write/__init__.c

@@ -126,11 +126,21 @@ void common_hal_neopixel_write(const digitalio_digitalinout_obj_t *digitalinout,
     // Update the next start to +2 ticks. It ensures that we've gone 300+ us.
     next_start_raw_ticks = port_get_raw_ticks(NULL) + 2;
 
+    #if defined(ESPRESSIF_ESP32C3_LYRA_STATUS_LED_HOLD)
+    // Hold the pin, deleting the channel seems to glitch pixels into turning off.
+    gpio_hold_en(digitalinout->pin->number);
+    #endif
+
     // Free channel again
     rmt_del_encoder(encoder);
     rmt_disable(channel);
     rmt_del_channel(channel);
     CHECK_ESP_RESULT(result);
     // Swap pin back to GPIO mode
     gpio_set_direction(digitalinout->pin->number, GPIO_MODE_OUTPUT);
+
+    #if defined(ESPRESSIF_ESP32C3_LYRA_STATUS_LED_HOLD)
+    // Release hold
+    gpio_hold_dis(digitalinout->pin->number);
+    #endif
 }