From 555bf7cc12dd4f6b3d990b6a918aa3461e1f3123 Mon Sep 17 00:00:00 2001
From: Michael Himing <git@michaelhiming.com>
Date: Tue, 26 Jul 2022 21:07:55 +1000
Subject: [PATCH] Add board: seeed_xiao_esp32c3

---
 .../boards/seeed_xiao_esp32c3/board.c         | 26 +++++++++++
 .../boards/seeed_xiao_esp32c3/mpconfigboard.h | 14 ++++++
 .../seeed_xiao_esp32c3/mpconfigboard.mk       | 10 +++++
 .../boards/seeed_xiao_esp32c3/pins.c          | 43 +++++++++++++++++++
 .../boards/seeed_xiao_esp32c3/sdkconfig       |  5 +++
 5 files changed, 98 insertions(+)
 create mode 100644 ports/espressif/boards/seeed_xiao_esp32c3/board.c
 create mode 100644 ports/espressif/boards/seeed_xiao_esp32c3/mpconfigboard.h
 create mode 100644 ports/espressif/boards/seeed_xiao_esp32c3/mpconfigboard.mk
 create mode 100644 ports/espressif/boards/seeed_xiao_esp32c3/pins.c
 create mode 100644 ports/espressif/boards/seeed_xiao_esp32c3/sdkconfig

diff --git a/ports/espressif/boards/seeed_xiao_esp32c3/board.c b/ports/espressif/boards/seeed_xiao_esp32c3/board.c
new file mode 100644
index 0000000000..f5fd5702c3
--- /dev/null
+++ b/ports/espressif/boards/seeed_xiao_esp32c3/board.c
@@ -0,0 +1,26 @@
+#include "shared-bindings/microcontroller/Pin.h"
+#include "supervisor/board.h"
+
+#include "components/driver/include/driver/gpio.h"
+
+void board_init(void) {
+    // Debug UART
+    #ifdef DEBUG
+    common_hal_never_reset_pin(&pin_GPIO20);
+    common_hal_never_reset_pin(&pin_GPIO21);
+    #endif
+}
+
+bool board_requests_safe_mode(void) {
+    return false;
+}
+
+bool espressif_board_reset_pin_number(gpio_num_t pin_number) {
+    return false;
+}
+
+void reset_board(void) {
+}
+
+void board_deinit(void) {
+}
diff --git a/ports/espressif/boards/seeed_xiao_esp32c3/mpconfigboard.h b/ports/espressif/boards/seeed_xiao_esp32c3/mpconfigboard.h
new file mode 100644
index 0000000000..638be9d197
--- /dev/null
+++ b/ports/espressif/boards/seeed_xiao_esp32c3/mpconfigboard.h
@@ -0,0 +1,14 @@
+#define MICROPY_HW_BOARD_NAME "Seeed Studio XIAO ESP32C3"
+#define MICROPY_HW_MCU_NAME "ESP32-C3FN4"
+
+#define DEFAULT_I2C_BUS_SCL (&pin_GPIO7)
+#define DEFAULT_I2C_BUS_SDA (&pin_GPIO6)
+
+#define DEFAULT_SPI_BUS_SCK (&pin_GPIO8)
+#define DEFAULT_SPI_BUS_MOSI (&pin_GPIO10)
+#define DEFAULT_SPI_BUS_MISO (&pin_GPIO9)
+
+#define DEFAULT_UART_BUS_RX (&pin_GPIO20)
+#define DEFAULT_UART_BUS_TX (&pin_GPIO21)
+
+#define CIRCUITPY_ESP_USB_SERIAL_JTAG (1)
diff --git a/ports/espressif/boards/seeed_xiao_esp32c3/mpconfigboard.mk b/ports/espressif/boards/seeed_xiao_esp32c3/mpconfigboard.mk
new file mode 100644
index 0000000000..9e14c9ac7f
--- /dev/null
+++ b/ports/espressif/boards/seeed_xiao_esp32c3/mpconfigboard.mk
@@ -0,0 +1,10 @@
+CIRCUITPY_CREATOR_ID = 0x000C2886
+CIRCUITPY_CREATION_ID = 0x00C30001
+
+IDF_TARGET = esp32c3
+
+INTERNAL_FLASH_FILESYSTEM = 1
+
+CIRCUITPY_ESP_FLASH_MODE = qio
+CIRCUITPY_ESP_FLASH_FREQ = 80m
+CIRCUITPY_ESP_FLASH_SIZE = 4MB
diff --git a/ports/espressif/boards/seeed_xiao_esp32c3/pins.c b/ports/espressif/boards/seeed_xiao_esp32c3/pins.c
new file mode 100644
index 0000000000..5fc475d564
--- /dev/null
+++ b/ports/espressif/boards/seeed_xiao_esp32c3/pins.c
@@ -0,0 +1,43 @@
+#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_D0), MP_ROM_PTR(&pin_GPIO2) },
+    { MP_ROM_QSTR(MP_QSTR_A0), MP_ROM_PTR(&pin_GPIO2) },
+
+    { MP_ROM_QSTR(MP_QSTR_D1), MP_ROM_PTR(&pin_GPIO3) },
+    { MP_ROM_QSTR(MP_QSTR_A1), MP_ROM_PTR(&pin_GPIO3) },
+
+    { MP_ROM_QSTR(MP_QSTR_D2), MP_ROM_PTR(&pin_GPIO4) },
+    { MP_ROM_QSTR(MP_QSTR_A2), MP_ROM_PTR(&pin_GPIO4) },
+
+    { MP_ROM_QSTR(MP_QSTR_D3), MP_ROM_PTR(&pin_GPIO5) },
+    { MP_ROM_QSTR(MP_QSTR_A3), MP_ROM_PTR(&pin_GPIO5) },
+
+    { MP_ROM_QSTR(MP_QSTR_D4), MP_ROM_PTR(&pin_GPIO6) },
+    { MP_ROM_QSTR(MP_QSTR_SDA), MP_ROM_PTR(&pin_GPIO6) },
+
+    { MP_ROM_QSTR(MP_QSTR_D5), MP_ROM_PTR(&pin_GPIO7) },
+    { MP_ROM_QSTR(MP_QSTR_SCL), MP_ROM_PTR(&pin_GPIO7) },
+
+    { MP_ROM_QSTR(MP_QSTR_D6), MP_ROM_PTR(&pin_GPIO21) },
+    { MP_ROM_QSTR(MP_QSTR_TX), MP_ROM_PTR(&pin_GPIO21) },
+
+    { MP_ROM_QSTR(MP_QSTR_D7), MP_ROM_PTR(&pin_GPIO20) },
+    { MP_ROM_QSTR(MP_QSTR_RX), MP_ROM_PTR(&pin_GPIO20) },
+
+    { MP_ROM_QSTR(MP_QSTR_D8), MP_ROM_PTR(&pin_GPIO8) },
+    { MP_ROM_QSTR(MP_QSTR_SCK), MP_ROM_PTR(&pin_GPIO8) },
+
+    { MP_ROM_QSTR(MP_QSTR_D9), MP_ROM_PTR(&pin_GPIO9) },
+    { MP_ROM_QSTR(MP_QSTR_MISO), MP_ROM_PTR(&pin_GPIO9) },
+
+    { MP_ROM_QSTR(MP_QSTR_D10), MP_ROM_PTR(&pin_GPIO10) },
+    { MP_ROM_QSTR(MP_QSTR_MOSI), MP_ROM_PTR(&pin_GPIO10) },
+
+    { MP_ROM_QSTR(MP_QSTR_I2C), MP_ROM_PTR(&board_i2c_obj) },
+    { MP_ROM_QSTR(MP_QSTR_SPI), MP_ROM_PTR(&board_spi_obj) },
+    { MP_ROM_QSTR(MP_QSTR_UART), MP_ROM_PTR(&board_uart_obj) },
+};
+MP_DEFINE_CONST_DICT(board_module_globals, board_module_globals_table);
diff --git a/ports/espressif/boards/seeed_xiao_esp32c3/sdkconfig b/ports/espressif/boards/seeed_xiao_esp32c3/sdkconfig
new file mode 100644
index 0000000000..b2c9bc0fe6
--- /dev/null
+++ b/ports/espressif/boards/seeed_xiao_esp32c3/sdkconfig
@@ -0,0 +1,5 @@
+#
+# LWIP
+#
+CONFIG_LWIP_LOCAL_HOSTNAME="seeed-xiao-esp32c3"
+# end of LWIP