From d3d586b6d20608cd1e0cb979f0f1bc7afdf551b1 Mon Sep 17 00:00:00 2001
From: ayabusa <lebgpub@gmail.com>
Date: Mon, 1 Apr 2024 18:32:34 +0200
Subject: [PATCH] added timer support, and incomplete keyboard system

---
 .vscode/settings.json                     |   4 +-
 numworks_port/build/Laplace/gpio_helper.o | Bin 5604 -> 6224 bytes
 numworks_port/build/Laplace/keyboard.o    | Bin 0 -> 4396 bytes
 numworks_port/build/Laplace/laplace.o     | Bin 2368 -> 2440 bytes
 numworks_port/build/Laplace/time.o        | Bin 0 -> 2920 bytes
 numworks_port/build/main.bin              | Bin 66805 -> 67421 bytes
 numworks_port/build/main.elf              | Bin 275616 -> 278736 bytes
 numworks_port/build/main.o                | Bin 2336 -> 2384 bytes
 numworks_port/src/Laplace/gpio_helper.c   |  28 ++++++++
 numworks_port/src/Laplace/gpio_helper.h   |   1 +
 numworks_port/src/Laplace/keyboard.c      |  74 ++++++++++++++++++++++
 numworks_port/src/Laplace/keyboard.h      |  27 ++++++++
 numworks_port/src/Laplace/laplace.c       |   5 ++
 numworks_port/src/Laplace/laplace.h       |   1 +
 numworks_port/src/Laplace/time.c          |  13 ++++
 numworks_port/src/Laplace/time.h          |  18 ++++++
 numworks_port/src/main.c                  |  14 +++-
 numworks_port/src/main.h                  |   2 +
 18 files changed, 184 insertions(+), 3 deletions(-)
 create mode 100644 numworks_port/build/Laplace/keyboard.o
 create mode 100644 numworks_port/build/Laplace/time.o
 create mode 100644 numworks_port/src/Laplace/keyboard.c
 create mode 100644 numworks_port/src/Laplace/keyboard.h
 create mode 100644 numworks_port/src/Laplace/time.c
 create mode 100644 numworks_port/src/Laplace/time.h

diff --git a/.vscode/settings.json b/.vscode/settings.json
index 13b0224..02bb9b3 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -19,6 +19,8 @@
         "tuple": "cpp",
         "main.h": "c",
         "led.h": "c",
-        "stm32f730xx.h": "c"
+        "stm32f730xx.h": "c",
+        "keyboard.h": "c",
+        "gpio_helper.h": "c"
     }
 }
\ No newline at end of file
diff --git a/numworks_port/build/Laplace/gpio_helper.o b/numworks_port/build/Laplace/gpio_helper.o
index 5e119b80713dd96cfdcdbae532c878b319c2cb70..3a0b9593130df5230eac96cd64a07e52e0efe777 100644
GIT binary patch
delta 2494
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delta 1994
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diff --git a/numworks_port/build/Laplace/keyboard.o b/numworks_port/build/Laplace/keyboard.o
new file mode 100644
index 0000000000000000000000000000000000000000..0e37f31303c58397223bf3ed16626905a946b4f6
GIT binary patch
literal 4396
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literal 0
HcmV?d00001

diff --git a/numworks_port/build/Laplace/laplace.o b/numworks_port/build/Laplace/laplace.o
index dd5dd2383737841e7a8dcb34e9c9d709b89e3ce7..2cb6cb80ea24d2d9372472c3addf3fe62dce1fc4 100644
GIT binary patch
delta 293
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delta 225
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diff --git a/numworks_port/build/Laplace/time.o b/numworks_port/build/Laplace/time.o
new file mode 100644
index 0000000000000000000000000000000000000000..46216b8d908e6c22b2cdff126581e16fb87d6259
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/numworks_port/build/main.bin b/numworks_port/build/main.bin
index ba87df02f0d362b509db57513a46a24dc23cb77b..4e1ba36cf309dd293c984a5fcad0b834f54e4412 100755
GIT binary patch
delta 846
zcmZ8gO=uHA6n-<ajfsh*X_}gvib=L=X~Bz#U_g=vS7?-CL=@`J9@m4=+KZb#BvdPU
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delta 247
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diff --git a/numworks_port/build/main.elf b/numworks_port/build/main.elf
index ab1e7ff099a5ddac234975b6ae1984b796d256f6..a8a93d7db0dceede698ee0264ca3ebcbd2055148 100755
GIT binary patch
delta 8007
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diff --git a/numworks_port/build/main.o b/numworks_port/build/main.o
index 9b45cec0981edc7353dec2e37b1ed21c131d7a21..41168c9f98f9c17033e0a1ae4990c98ccb986bb6 100644
GIT binary patch
delta 348
zcmXw!F-rqM5QS$hyL*R5j0YhrB1R5eBw~V{MG8~cD2QMq2&Zs|1XMy2P*Yo2dW=}7
zF}+-^*eVE?`UAvT2&7A#4LY#j+j$JLZ@d1xe^bOtvN*T8)9*A!gW(8^mc#E300=%z
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onzw`(RQC*4DDjMpG5|$-^a6Rs53bXf7wBsV(BnY=#T&=<3)kvOD*ylh

delta 290
zcmca0v_NQr0wcpjMQJWZh5z6G{b$(Uuy>-5EThoGtPnOv1|SfccqE2b2*iQ{+sV3&
z+CsbxtV|#QQC3z1eO5+WCZ^5#j8hmVvoOmr3T;+o)@EcBn(WJ>KDmWOS-Lp2Bt9oK
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diff --git a/numworks_port/src/Laplace/gpio_helper.c b/numworks_port/src/Laplace/gpio_helper.c
index 7211792..d5ba4c2 100644
--- a/numworks_port/src/Laplace/gpio_helper.c
+++ b/numworks_port/src/Laplace/gpio_helper.c
@@ -59,6 +59,34 @@ void set_output_pin(uint8_t gpio_x, uint8_t pin, bool state){
     }
 }
 
+bool read_input_pin(uint8_t gpio_x, uint8_t pin){
+    // Invert the IDR register since '0' means 'pressed'.
+    uint8_t idr_val = 0;
+    switch (gpio_x)
+    {
+    case GPIO_A:
+        idr_val = ~GPIOA->IDR;
+        break;
+    case GPIO_B:
+        idr_val = ~GPIOB->IDR;
+        break;
+    case GPIO_C:
+        idr_val = ~GPIOC->IDR;
+        break;
+    case GPIO_D:
+        idr_val = ~GPIOD->IDR;
+        break;
+    case GPIO_E:
+        idr_val = ~GPIOE->IDR;
+        break;
+    
+    default:
+        break;
+    }
+
+    return idr_val & (1 << pin);
+}
+
 void enable_gpio_x_rcc(uint8_t gpio_x){
     switch (gpio_x)
     {
diff --git a/numworks_port/src/Laplace/gpio_helper.h b/numworks_port/src/Laplace/gpio_helper.h
index 4f73d94..a09f88f 100644
--- a/numworks_port/src/Laplace/gpio_helper.h
+++ b/numworks_port/src/Laplace/gpio_helper.h
@@ -17,6 +17,7 @@
 #define GPIO_E 4
 
 void set_output_pin(uint8_t gpio_x, uint8_t pin, bool state);
+bool read_input_pin(uint8_t gpio_x, uint8_t pin);
 void enable_gpio_x_rcc(uint8_t gpio_x);
 
 #endif
\ No newline at end of file
diff --git a/numworks_port/src/Laplace/keyboard.c b/numworks_port/src/Laplace/keyboard.c
new file mode 100644
index 0000000..46f2e13
--- /dev/null
+++ b/numworks_port/src/Laplace/keyboard.c
@@ -0,0 +1,74 @@
+/* The keyboard is a matrix that is laid out as follow:
+ * (K_B2 and K_B3 are respectively specific to N0100 and N0110
+ *
+ *      |  PC0 |  PC1 | PC2  | PC3  | PC4  | PC5  |
+ * -----+------+------+------+------+------+------+
+ *  PE0 | K_A1 | K_A2 | K_A3 | K_A4 | K_A5 | K_A6 |
+ * -----+------+------+------+------+------+------+
+ *  PE1 | K_B1 |(K_B2)|(K_B3)|      |      |      |
+ * -----+------+------+------+------+------+------+
+ *  PE2 | K_C1 | K_C2 | K_C3 | K_C4 | K_C5 | K_C6 |
+ * -----+------+------+------+------+------+------+
+ *  PE3 | K_D1 | K_D2 | K_D3 | K_D4 | K_D5 | K_D6 |
+ * -----+------+------+------+------+------+------+
+ *  PE4 | K_E1 | K_E2 | K_E3 | K_E4 | K_E5 | K_E6 |
+ * -----+------+------+------+------+------+------+
+ *  PE5 | K_F1 | K_F2 | K_F3 | K_F4 | K_F5 |      |
+ * -----+------+------+------+------+------+------+
+ *  PE6 | K_G1 | K_G2 | K_G3 | K_G4 | K_G5 |      |
+ * -----+------+------+------+------+------+------+
+ *  PE7 | K_H1 | K_H2 | K_H3 | K_H4 | K_H5 |      |
+ * -----+------+------+------+------+------+------+
+ *  PE8 | K_I1 | K_I2 | K_I3 | K_I4 | K_I5 |      |
+ * -----+------+------+------+------+------+------|
+ *
+ *  We decide to drive the rows (PE0-8) and read the columns (PC0-5).
+ *
+ *  To avoid short-circuits, the pins E0-E8 will not be standard outputs but
+ *  only open-drain. Open drain means the pin is either driven low or left
+ *  floating.
+ *  When a user presses multiple keys, a connection between two rows can happen.
+ *  If we don't use open drain outputs, this situation could trigger a short
+ *  circuit between an output driving high and another driving low.
+ *
+ *  If the outputs are open-drain, this means that the input must be pulled up.
+ *  So if the input reads "1", this means the key is in fact *not* pressed, and
+ *  if it reads "0" it means that there's a short to an open-drain output. Which
+ *  means the corresponding key is pressed.
+ */
+
+#include "keyboard.h"
+
+const uint8_t number_of_rows = 9;
+const uint8_t number_of_columns = 6;
+
+void keyboard_init(){
+    for (int i = 0; i < number_of_rows; i++){
+        // setup rows (output open drain)
+        GPIOA->MODER  &= ~(0x3 << (i*2));
+        GPIOA->MODER  |=  (0x1 << (i*2));
+        GPIOA->OTYPER |= (1 << i);
+    }
+    for (int i = 0; i < number_of_columns; i++){
+        // setup columns (input pullup)
+        GPIOC->MODER  &= ~(0x3 << (i*2));
+        GPIOC->PUPDR  &= ~(0x3 << (i*2));
+        GPIOC->PUPDR  |=  (0x1 << (i*2));
+    }
+}
+
+bool keyboard_scan(){
+    set_output_pin(GPIO_A, 6, true);
+    bool key_state = read_input_pin(GPIO_C, 3);
+    return key_state; 
+    // A LOT TODO
+}
+
+void activate_row(uint8_t row_nb){
+    // set all row to 0 and then reenable selected row
+    for(int i =0; i < number_of_rows; i++){
+        set_output_pin(GPIO_A, i, true);
+    }
+    set_output_pin(GPIO_A, row_nb, false);
+    us_wait(100);
+}
\ No newline at end of file
diff --git a/numworks_port/src/Laplace/keyboard.h b/numworks_port/src/Laplace/keyboard.h
new file mode 100644
index 0000000..32d7b97
--- /dev/null
+++ b/numworks_port/src/Laplace/keyboard.h
@@ -0,0 +1,27 @@
+/** @file keyboard.h
+ * 
+ * @brief All action related to keyboard scan
+ *
+ */ 
+
+#ifndef KEYBOARD_H
+#define KEYBOARD_H
+
+enum PIN_ROW {
+	A = 1,
+	B = 0,
+	C = 2,
+    D = 3,
+	E = 4,
+	F = 5,
+    G = 6,
+	H = 7,
+	I = 8
+};
+
+#include "gpio_helper.h"
+
+void keyboard_init();
+bool keyboard_scan();
+
+#endif
\ No newline at end of file
diff --git a/numworks_port/src/Laplace/laplace.c b/numworks_port/src/Laplace/laplace.c
index 4edfdd9..deb4ae3 100644
--- a/numworks_port/src/Laplace/laplace.c
+++ b/numworks_port/src/Laplace/laplace.c
@@ -4,4 +4,9 @@ void laplace_init(){
     // Enable the GPIO peripheral in RCC.
     enable_gpio_x_rcc(GPIO_B);
     led_init();
+    //col (in)
+    enable_gpio_x_rcc(GPIO_C);
+    //row (out)
+    enable_gpio_x_rcc(GPIO_A);
+    keyboard_init();
 }
\ No newline at end of file
diff --git a/numworks_port/src/Laplace/laplace.h b/numworks_port/src/Laplace/laplace.h
index d775efb..626bf7e 100644
--- a/numworks_port/src/Laplace/laplace.h
+++ b/numworks_port/src/Laplace/laplace.h
@@ -9,6 +9,7 @@
 
 #include "gpio_helper.h"
 #include "led.h"
+#include "keyboard.h"
 
 void laplace_init();
 
diff --git a/numworks_port/src/Laplace/time.c b/numworks_port/src/Laplace/time.c
new file mode 100644
index 0000000..c257d18
--- /dev/null
+++ b/numworks_port/src/Laplace/time.c
@@ -0,0 +1,13 @@
+#include "time.h"
+
+void us_wait(uint8_t micro_seconds) {
+  for (volatile uint32_t i=0; i<loops_per_microsecond*micro_seconds; i++) {
+    __asm volatile("nop");
+  }
+}
+
+void ms_wait(uint16_t milli_seconds) {
+  for (volatile uint32_t i=0; i<loops_per_millisecond*milli_seconds; i++) {
+    __asm volatile("nop");
+  }
+}
\ No newline at end of file
diff --git a/numworks_port/src/Laplace/time.h b/numworks_port/src/Laplace/time.h
new file mode 100644
index 0000000..ed59cc8
--- /dev/null
+++ b/numworks_port/src/Laplace/time.h
@@ -0,0 +1,18 @@
+/** @file time.h
+ * 
+ * @brief Handle timer operation
+ *
+ */ 
+
+#ifndef TIME_H
+#define TIME_H
+
+#define loops_per_microsecond 1
+#define loops_per_millisecond 960
+
+#include "stdint.h"
+
+void us_wait(uint8_t micro_seconds);
+void ms_wait(uint16_t milli_seconds);
+
+#endif
\ No newline at end of file
diff --git a/numworks_port/src/main.c b/numworks_port/src/main.c
index 47c2a0f..81f4906 100644
--- a/numworks_port/src/main.c
+++ b/numworks_port/src/main.c
@@ -1,8 +1,18 @@
 #include "main.h"
 
 // this is our main function, I separated it from the c++ code because I don't like this language
-main_entry(){
+void main_entry(){
     // init all the peripherals
     laplace_init();
-    set_led_all(true);
+    ms_wait(2000);
+    set_led_green(true);
+    while (1)
+    {
+        /*if(keyboard_scan()){
+            set_led_green(true);
+        }else{
+            set_led_green(false);
+        }*/
+    }
+    
 }
\ No newline at end of file
diff --git a/numworks_port/src/main.h b/numworks_port/src/main.h
index 6d4e8bf..85c894f 100644
--- a/numworks_port/src/main.h
+++ b/numworks_port/src/main.h
@@ -9,6 +9,8 @@
 
 #include "Laplace/laplace.h"
 #include "Laplace/led.h"
+#include "Laplace/keyboard.h"
+#include "Laplace/time.h"
 
 void main_entry();