Add Elite-C to converters (#18309)

platforms/chibios/converters/elite_c_to_stemcell/_pin_defs.h

@@ -0,0 +1,54 @@
+// Copyright 2022 Mega Mind (@megamind4089)
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+// Pindefs for v2.0.0
+// https://megamind4089.github.io/STeMCell/pinout/
+
+// Left side (front)
+#ifdef STEMCELL_UART_SWAP
+#    define D3 PAL_LINE(GPIOA, 3)
+#    define D2 PAL_LINE(GPIOA, 2)
+#else
+#    define D3 PAL_LINE(GPIOA, 2)
+#    define D2 PAL_LINE(GPIOA, 3)
+#endif
+//      GND
+//      GND
+#ifdef STEMCELL_I2C_SWAP
+#    define D1 PAL_LINE(GPIOB, 6)
+#    define D0 PAL_LINE(GPIOB, 7)
+#else
+#    define D1 PAL_LINE(GPIOB, 7)
+#    define D0 PAL_LINE(GPIOB, 6)
+#endif
+
+#define D4 PAL_LINE(GPIOA, 15)
+#define C6 PAL_LINE(GPIOB, 3)
+#define D7 PAL_LINE(GPIOB, 4)
+#define E6 PAL_LINE(GPIOB, 5)
+#define B4 PAL_LINE(GPIOB, 8)
+#define B5 PAL_LINE(GPIOB, 9)
+
+// Right side (front)
+//      RAW
+//      GND
+//      RESET
+//      VCC
+#define F4 PAL_LINE(GPIOB, 10)
+#define F5 PAL_LINE(GPIOB, 2)
+#define F6 PAL_LINE(GPIOB, 1)
+#define F7 PAL_LINE(GPIOB, 0)
+
+#define B1 PAL_LINE(GPIOA, 5)
+#define B3 PAL_LINE(GPIOA, 6)
+#define B2 PAL_LINE(GPIOA, 7)
+#define B6 PAL_LINE(GPIOA, 4)
+
+// Bottom row
+#define B7 PAL_LINE(GPIOC, 13)
+#define D5 PAL_LINE(GPIOC, 14)
+#define C7 PAL_LINE(GPIOC, 15)
+#define F1 PAL_LINE(GPIOA, 0)
+#define F0 PAL_LINE(GPIOA, 1)

platforms/chibios/converters/elite_c_to_stemcell/converter.mk

@@ -0,0 +1,18 @@
+# Copyright 2022 Mega Mind (@megamind4089)
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+MCU := STM32F411
+BOARD := STEMCELL
+BOOTLOADER := tinyuf2
+
+SERIAL_DRIVER ?= usart
+WS2812_DRIVER ?= bitbang
+
+ifeq ($(strip $(STMC_US)), yes)
+  OPT_DEFS += -DSTEMCELL_UART_SWAP
+endif
+
+ifeq ($(strip $(STMC_IS)), yes)
+  OPT_DEFS += -DSTEMCELL_I2C_SWAP
+endif
+