[Keyboard] Improvements to m122_3270 (#13947)

Co-authored-by: Jay Maynard <jmaynard@conmicro.com>

keyboards/tronguylabs/m122_3270/bluepill/chconf.h

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+/* Copyright 2020 QMK
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/*
+ * This file was auto-generated by:
+ *    `qmk chibios-confmigrate -i keyboards/handwired/onekey/bluepill/chconf.h -r platforms/chibios/common/configs/chconf.h`
+ */
+
+#pragma once
+
+#define CH_CFG_ST_TIMEDELTA 0
+
+#define CH_CFG_USE_CONDVARS_TIMEOUT FALSE
+
+#include_next <chconf.h>
+

keyboards/tronguylabs/m122_3270/bluepill/config.h

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+/* Copyright 2021 James R. Maynard III <jaymaynard@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+// place overrides below
+
+// Blackpill pin assignments: reversed the rows from the Teensy version for easier PCB layout
+// DO NOT USE the following pins: A9 (has pulldown on it), A11/A12 (USB lines), B2 (external pulldown)
+// C13 has an LED, and C13/C14/C15 are best used as inputs (with DIODE_DIRECTION set to ROW2COL, the
+// rows are inputs). Note that every usable I/O pin is used.
+#define MATRIX_COL_PINS { B1, B10, B11, B12, B13, B14, B15, A8, B0, A10, A7, A6, A15, B3, B4, B5, B6, B7, B8, B9 }
+#define MATRIX_ROW_PINS { C13, C14, C15, A1, A2, A3, A4, A5 }
+
+// The BluePill version is version 3
+#define DEVICE_VER      0x0003

keyboards/tronguylabs/m122_3270/bluepill/readme.md

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+# BluePill controller for m122-3270
+This directory contains the BluePill-specific definitions for the M122-3270 keyboard.

keyboards/tronguylabs/m122_3270/bluepill/rules.mk

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+# Overrides for the Bluepill version
+
+# MCU name
+MCU = STM32F103
+
+# Bootloader selection
+BOOTLOADER = stm32duino