Add Bluepill (stm32f103) handwired keyboard (#4126)

* Main folder

Main folder with some changes like the base layout and matrix for uploading in a future to the qmk repositorie

* First Commit

Firsts non previously commited changes:
-Changed to keyboards/handwired
-Basic credit to Xydane
-70% Layout

* Modified file structure for several keyboards

As I don't want to create several folders and overcrowd the main folders I made a few modifications to being able of configure several keyboards as revisions of the main keyboard.
Added a second variant.
Compiling tests went right but I haven't tried it on the controller.

* Starting leds

* Started dual color leds PWM functions and configs

I started to create the PWM functions and configs based on internet examples, it doesn't compile yet

* Backtraced a bit to establish and try debug before continuing the pwm

Just this, algo some doc as a new pinout image, space cadet modification to try if it works and little more

* Deleted unuseful stuff

After trying the reestructure to being compatible with several keyboards and that it worked I deleted the other keyboard.
Added space cadet shift to ISO.
Finally I couldn't debug everything and I'm getting quite frustrated to continue much more than just adding pwm leds

* Changed again Iso fix for Space Cadet

* Renamed keyboard, future pull

I just renamed the keyboard and made some simplifying changes in order to make a pull request sometime soon.

I'm too frustrated, tired and knowledge limited to achive using the PWM for leds, I didn't even get to use the debug mode...

I intend to end basic led color change using layers (if I can), document everything properly and make a pull request so other users can continue/use this project.

* Writed Readme.md file

I also corrected a previous compilation problem and ordered a bit the keymaps

* Corrected readme

* Try to add layer activated light

* Revert "Try to add layer activated light"

This reverts commit 205af820d845dab08988f329b9f062f558060220.

* Progress to fork

Coming back to work, upcoming pull

* Linked image

Corrected readme

* Some cleanning

Added images to readme, som cleaning, burning after commit.

* Almost finished (working)

Finally

* Finished bluepill firmware

Just finished and tried layer dependant led colors. Going for merge

* Deleted innecesary stuff and trailing spaces

Just as commit title said.

* Coding conventions

Just modified some files to respect coding conventions

* Deleted XXXXXX define

Checking some other PR seen this improvement

* Changes suggested on PR

Firs doing the easy changes

* More changes for the PR

-I also deleted one unused function for led toggling on matrix.c (Now it uses layer dependent baklight, algo on of on start)
-Deleted commented function on keymaps.

Right now only needs testing and all pragma replaces.

* Almost every pragma change on PR

That's almost finished, only waiting for reply due to compiling errors

* Revert "Almost every pragma change on PR"

This reverts commit 07f23aa862b370cdf0ae37d6f2130c9e9856f491.

* Revert last commit

I moddified by mistake a file from another keyboard

* Solved last pragma

Compiles fine.
Now I only need to test it, I say you if it works to include it in the main repository.

1 files changed, 225 insertions, 0 deletions

diff --git a/keyboards/handwired/bluepill/bluepill70/matrix.c b/keyboards/handwired/bluepill/bluepill70/matrix.c
new file mode 100644
index 0000000000..b2c38e5226
--- /dev/null
+++ b/keyboards/handwired/bluepill/bluepill70/matrix.c
@@ -0,0 +1,225 @@
+/*
+Copyright 2012 Jun Wako <wakojun@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/>.
+*/
+
+#include "ch.h"
+#include "hal.h"
+
+/*
+ * scan matrix
+ */
+#include "print.h"
+#include "debug.h"
+#include "util.h"
+#include "matrix.h"
+#include "wait.h"
+
+//#include "pwm.c"
+
+#ifndef DEBOUNCE
+#   define DEBOUNCE 5
+#endif
+static uint8_t debouncing = DEBOUNCE;
+
+/* matrix state(1:on, 0:off) */
+static matrix_row_t matrix[MATRIX_ROWS];
+static matrix_row_t matrix_debouncing[MATRIX_ROWS];
+
+static matrix_row_t read_cols(void);
+static void init_cols(void);
+static void unselect_rows(void);
+static void select_row(uint8_t row);
+
+inline uint8_t matrix_rows(void){
+  return MATRIX_ROWS;
+}
+
+inline uint8_t matrix_cols(void){
+  return MATRIX_COLS;
+}
+
+/* generic STM32F103C8T6 board */
+#ifdef BOARD_GENERIC_STM32_F103
+// This could be removed, only used now in matrix_init()
+#define LED_ON()    do { palClearPad(GPIOA, 1) ;} while (0)
+#define LED_OFF()   do { palSetPad(GPIOA, 1); } while (0)
+#endif
+
+__attribute__ ((weak))
+void matrix_init_kb(void) {
+    matrix_init_user();
+}
+
+__attribute__ ((weak))
+void matrix_scan_kb(void) {
+    matrix_scan_user();
+}
+
+__attribute__ ((weak))
+void matrix_init_user(void) {
+}
+
+__attribute__ ((weak))
+void matrix_scan_user(void) {
+}
+
+void matrix_init(void)
+{
+  // initialize row and col
+  unselect_rows();
+  init_cols();
+  // initialize matrix state: all keys off
+  for (uint8_t i=0; i < MATRIX_ROWS; i++) {
+    matrix[i] = 0;
+    matrix_debouncing[i] = 0;
+  }
+  //debug
+  debug_matrix = true;
+  LED_ON();
+  wait_ms(500);
+  LED_OFF();
+
+  matrix_init_quantum();
+}
+
+uint8_t matrix_scan(void){
+  for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+    select_row(i);
+    wait_us(30);  // without this wait read unstable value.
+    matrix_row_t cols = read_cols();
+    if (matrix_debouncing[i] != cols) {
+      matrix_debouncing[i] = cols;
+      if (debouncing) {
+        debug("bounce!: "); debug_hex(debouncing); debug("\n");
+      }
+    debouncing = DEBOUNCE;
+    }
+    unselect_rows();
+  }
+
+  if (debouncing) {
+    if (--debouncing) {
+      wait_ms(1);
+    } else {
+      for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+        matrix[i] = matrix_debouncing[i];
+      }
+    }
+  }
+  matrix_scan_quantum();
+  return 1;
+}
+
+inline bool matrix_is_on(uint8_t row, uint8_t col){
+  return (matrix[row] & ((matrix_row_t)1<<col));
+}
+
+inline matrix_row_t matrix_get_row(uint8_t row){
+  return matrix[row];
+}
+
+void matrix_print(void){
+  print("\nr/c 0123456789ABCDEF\n");
+  for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+    phex(row); print(": ");
+    pbin_reverse16(matrix_get_row(row));
+    print("\n");
+  }
+}
+
+/* Column pin configuration
+ */
+//  Modified by Xydane
+static void  init_cols(void){
+  palSetPadMode(GPIOA, 5, PAL_MODE_INPUT_PULLUP);
+  palSetPadMode(GPIOA, 15, PAL_MODE_INPUT_PULLUP);
+  palSetPadMode(GPIOA, 10, PAL_MODE_INPUT_PULLUP);
+  palSetPadMode(GPIOA, 9, PAL_MODE_INPUT_PULLUP);
+  palSetPadMode(GPIOA, 8, PAL_MODE_INPUT_PULLUP);
+  palSetPadMode(GPIOB, 15, PAL_MODE_INPUT_PULLUP);
+  palSetPadMode(GPIOB, 14, PAL_MODE_INPUT_PULLUP);
+  palSetPadMode(GPIOB, 13, PAL_MODE_INPUT_PULLUP);
+  palSetPadMode(GPIOB, 12, PAL_MODE_INPUT_PULLUP);
+  palSetPadMode(GPIOB, 11, PAL_MODE_INPUT_PULLUP);
+  palSetPadMode(GPIOB, 10, PAL_MODE_INPUT_PULLUP);
+  palSetPadMode(GPIOB, 1, PAL_MODE_INPUT_PULLUP);
+  palSetPadMode(GPIOB, 0, PAL_MODE_INPUT_PULLUP);
+  palSetPadMode(GPIOA, 7, PAL_MODE_INPUT_PULLUP);
+  palSetPadMode(GPIOA, 6, PAL_MODE_INPUT_PULLUP);
+}
+
+/* Returns status of switches(1:on, 0:off) */
+//  Modified by Xydane
+static matrix_row_t read_cols(void){
+  return ((palReadPad(GPIOA, 5)==PAL_HIGH) ? 0 : (1<<0))
+    | ((palReadPad(GPIOA, 15)==PAL_HIGH) ? 0 : (1<<1))
+    | ((palReadPad(GPIOA, 10)==PAL_HIGH) ? 0 : (1<<2))
+    | ((palReadPad(GPIOA, 9)==PAL_HIGH) ? 0 : (1<<3))
+    | ((palReadPad(GPIOA, 8)==PAL_HIGH) ? 0 : (1<<4))
+    | ((palReadPad(GPIOB, 15)==PAL_HIGH) ? 0 : (1<<5))
+    | ((palReadPad(GPIOB, 14)==PAL_HIGH) ? 0 : (1<<6))
+    | ((palReadPad(GPIOB, 13)==PAL_HIGH) ? 0 : (1<<7))
+    | ((palReadPad(GPIOB, 12)==PAL_HIGH) ? 0 : (1<<8))
+    | ((palReadPad(GPIOB, 11)==PAL_HIGH) ? 0 : (1<<9))
+    | ((palReadPad(GPIOB, 10)==PAL_HIGH) ? 0 : (1<<10))
+    | ((palReadPad(GPIOB, 1)==PAL_HIGH) ? 0 : (1<<11))
+    | ((palReadPad(GPIOB, 0)==PAL_HIGH) ? 0 : (1<<12))
+    | ((palReadPad(GPIOA, 7)==PAL_HIGH) ? 0 : (1<<13))
+    | ((palReadPad(GPIOA, 6)==PAL_HIGH) ? 0 : (1<<14));
+}
+
+/* Row pin configuration
+ */
+//  Modified by Xydane
+static void unselect_rows(void){
+  palSetPadMode(GPIOB, 9, PAL_MODE_INPUT);
+  palSetPadMode(GPIOB, 8, PAL_MODE_INPUT);
+  palSetPadMode(GPIOB, 7, PAL_MODE_INPUT);
+  palSetPadMode(GPIOB, 6, PAL_MODE_INPUT);
+  palSetPadMode(GPIOB, 5, PAL_MODE_INPUT);
+  palSetPadMode(GPIOA, 4, PAL_MODE_INPUT);
+}
+
+//  Modified by Xydane
+static void select_row(uint8_t row){
+  (void)row;
+  switch (row) {
+    case 0:
+      palSetPadMode(GPIOB, 9, PAL_MODE_OUTPUT_PUSHPULL);
+      palClearPad(GPIOB, 9);
+      break;
+    case 1:
+      palSetPadMode(GPIOB, 8, PAL_MODE_OUTPUT_PUSHPULL);
+      palClearPad(GPIOB, 8);
+      break;
+    case 2:
+      palSetPadMode(GPIOB, 7, PAL_MODE_OUTPUT_PUSHPULL);
+      palClearPad(GPIOB, 7);
+      break;
+    case 3:
+      palSetPadMode(GPIOB, 6, PAL_MODE_OUTPUT_PUSHPULL);
+      palClearPad(GPIOB, 6);
+      break;
+    case 4:
+      palSetPadMode(GPIOB, 5, PAL_MODE_OUTPUT_PUSHPULL);
+      palClearPad(GPIOB, 5);
+      break;
+    case 5:
+      palSetPadMode(GPIOA, 4, PAL_MODE_OUTPUT_PUSHPULL);
+      palClearPad(GPIOA, 4);
+      break;
+  }
+}