[Keyboard] Added support for ErgoDox with STM32 Microcontroller (#5398)

* Began Work On STM32 Ergodox
 Changes to be committed:
	new file:   keyboards/ergodox_stm32/config.h
	new file:   keyboards/ergodox_stm32/rules.mk

* test

* Now it compile. Not linking thou

* Screw this Linker. It links now!

* Blinkly Keyboard

* bootloader test code

* Working on matrix / i2c stuff

* Progress (LED Blink)

* Progress on MCP_23017 Status Flag

* [WIP]

* update

* Works! Remeber to change back the bootloader address when the new bootloadrer is ready.

* Time to go debug the i2c

* Finally, it now works with PCB Rev 1.0.2

* updated for rev.2 pcb

* minor compilation fix

* Why when debugger is enabled then everything works.

* Remeber to call init functions.

* Update arm i2c driver to support STM32F103 series device.

* fix include once header. Replaced with #pragma once.

* complication test

1 files changed, 114 insertions, 0 deletions

diff --git a/keyboards/ergodox_stm32/ergodox_stm32.h b/keyboards/ergodox_stm32/ergodox_stm32.h
new file mode 100644
index 0000000000..be1c2e9c3b
--- /dev/null
+++ b/keyboards/ergodox_stm32/ergodox_stm32.h
@@ -0,0 +1,114 @@
+#pragma once
+
+#include "quantum.h"
+#include "action_layer.h"
+#include <stdint.h>
+#include <stdbool.h>
+#include "hal.h"
+
+// #define I2C_ADDR 0b01000000
+#define I2C_ADDR 0b01000000
+#define I2C_IODIRA 0x0
+#define I2C_IODIRB 0x1
+#define I2C_GPIOA 0x12
+#define I2C_GPIOB 0x13
+#define I2C_OLATA 0x14
+#define I2C_OLATB 0x15
+#define I2C_GPPUA 0x0C
+#define I2C_GPPUB 0x0D
+
+inline void ergodox_board_led_1_on(void) { palSetPad(GPIOA, 10); }
+inline void ergodox_board_led_2_on(void) { palSetPad(GPIOA, 9); }
+inline void ergodox_board_led_3_on(void) { palSetPad(GPIOA, 8); }
+inline void ergodox_board_led_1_off(void) { palClearPad(GPIOA, 10); }
+inline void ergodox_board_led_2_off(void) { palClearPad(GPIOA, 9); }
+inline void ergodox_board_led_3_off(void) { palClearPad(GPIOA, 8); }
+inline void ergodox_led_all_off(void)
+{
+  palClearPad(GPIOA, 10);
+  palClearPad(GPIOA, 9);
+  palClearPad(GPIOA, 8);
+}
+
+extern volatile int mcp23017_status;
+
+uint8_t init_mcp23017(void);
+
+void ergodox_blink_all_leds(void);
+
+/*
+ *   LEFT HAND: LINES 115-122
+ *  RIGHT HAND: LINES 124-131
+ */
+#define LAYOUT_ergodox(                     \
+                                            \
+    k00, k01, k02, k03, k04, k05, k06,      \
+    k10, k11, k12, k13, k14, k15, k16,      \
+    k20, k21, k22, k23, k24, k25,           \
+    k30, k31, k32, k33, k34, k35, k36,      \
+    k40, k41, k42, k43, k44,                \
+    k55, k56,                               \
+    k54,                                    \
+    k53, k52, k51,                          \
+                                            \
+    k07, k08, k09, k0A, k0B, k0C, k0D,      \
+    k17, k18, k19, k1A, k1B, k1C, k1D,      \
+    k28, k29, k2A, k2B, k2C, k2D,           \
+    k37, k38, k39, k3A, k3B, k3C, k3D,      \
+    k49, k4A, k4B, k4C, k4D,                \
+    k57, k58,                               \
+    k59,                                    \
+    k5C, k5B, k5A)                          \
+                                            \
+  /* matrix positions */                    \
+  {                                         \
+    {k00, k10, k20, k30, k40, KC_NO},       \
+        {k01, k11, k21, k31, k41, k51},     \
+        {k02, k12, k22, k32, k42, k52},     \
+        {k03, k13, k23, k33, k43, k53},     \
+        {k04, k14, k24, k34, k44, k54},     \
+        {k05, k15, k25, k35, KC_NO, k55},   \
+        {k06, k16, KC_NO, k36, KC_NO, k56}, \
+                                            \
+        {k07, k17, KC_NO, k37, KC_NO, k57}, \
+        {k08, k18, k28, k38, KC_NO, k58},   \
+        {k09, k19, k29, k39, k49, k59},     \
+        {k0A, k1A, k2A, k3A, k4A, k5A},     \
+        {k0B, k1B, k2B, k3B, k4B, k5B},     \
+        {k0C, k1C, k2C, k3C, k4C, k5C},     \
+    {                                       \
+      k0D, k1D, k2D, k3D, k4D, KC_NO        \
+    }                                       \
+  }
+
+/*  ---------- LEFT HAND -----------   ---------- RIGHT HAND ---------- */
+#define LAYOUT_ergodox_pretty(                                            \
+    L00, L01, L02, L03, L04, L05, L06, R00, R01, R02, R03, R04, R05, R06, \
+    L10, L11, L12, L13, L14, L15, L16, R10, R11, R12, R13, R14, R15, R16, \
+    L20, L21, L22, L23, L24, L25, R21, R22, R23, R24, R25, R26,           \
+    L30, L31, L32, L33, L34, L35, L36, R30, R31, R32, R33, R34, R35, R36, \
+    L40, L41, L42, L43, L44, R42, R43, R44, R45, R46,                     \
+    L55, L56, R50, R51,                                                   \
+    L54, R52,                                                             \
+    L53, L52, L51, R55, R54, R53)                                         \
+                                                                          \
+  /* matrix positions */                                                  \
+  {                                                                       \
+    {L00, L10, L20, L30, L40, KC_NO},                                     \
+        {L01, L11, L21, L31, L41, L51},                                   \
+        {L02, L12, L22, L32, L42, L52},                                   \
+        {L03, L13, L23, L33, L43, L53},                                   \
+        {L04, L14, L24, L34, L44, L54},                                   \
+        {L05, L15, L25, L35, KC_NO, L55},                                 \
+        {L06, L16, KC_NO, L36, KC_NO, L56},                               \
+                                                                          \
+        {R00, R10, KC_NO, R30, KC_NO, R50},                               \
+        {R01, R11, R21, R31, KC_NO, R51},                                 \
+        {R02, R12, R22, R32, R42, R52},                                   \
+        {R03, R13, R23, R33, R43, R53},                                   \
+        {R04, R14, R24, R34, R44, R54},                                   \
+        {R05, R15, R25, R35, R45, R55},                                   \
+    {                                                                     \
+      R06, R16, R26, R36, R46, KC_NO                                      \
+    }                                                                     \
+  }