Created base files for the typewriter driver

typewriter-driver/CMakeLists.txt

@@ -0,0 +1,13 @@
+cmake_minimum_required(VERSION 3.13)
+include(pico_sdk_import.cmake)
+project(typewriter_project C CXX ASM)
+set(CMAKE_C_STANDARD 11)
+set(CMAKE_CXX_STANDARD 17)
+pico_sdk_init()
+add_executable(main
+main.c
+)
+pico_enable_stdio_usb(main 1)
+pico_enable_stdio_uart(main 1)
+pico_add_extra_outputs(main)
+target_link_libraries(main pico_stdlib)

typewriter-driver/main.c

@@ -0,0 +1,100 @@
+#include <stdio.h>
+#include <string.h>
+#include "pico/stdlib.h"
+#include "hardware/gpio.h"
+#include "pico/binary_info.h"
+
+const uint LED_PIN = 0;
+
+// Define hash table for letter matrix 
+
+#define TABLE_SIZE 256 
+
+typedef struct {
+    char key;
+    int l_value;
+    int r_value;
+} Entry;
+
+typedef struct {
+    Entry entries[TABLE_SIZE];
+    int count;
+} LetterMatrix;
+
+void init_matrix(LetterMatrix* mt) {
+    mt->count = 0;
+
+    mt->entries[mt->count++] = (Entry){'a', 3, 16};
+    mt->entries[mt->count++] = (Entry){'b', 4, 15};
+    mt->entries[mt->count++] = (Entry){'c', 1, 9};
+    mt->entries[mt->count++] = (Entry){'d', 2, 13};
+    mt->entries[mt->count++] = (Entry){'e', 2, 14};
+    mt->entries[mt->count++] = (Entry){'f', 1, 13};
+    mt->entries[mt->count++] = (Entry){'g', 1, 16};
+    mt->entries[mt->count++] = (Entry){'h', 4, 16};
+    mt->entries[mt->count++] = (Entry){'i', 5, 13};
+    mt->entries[mt->count++] = (Entry){'j', 4, 13};
+    mt->entries[mt->count++] = (Entry){'k', 5, 14};
+    mt->entries[mt->count++] = (Entry){'l', 5, 16};
+    mt->entries[mt->count++] = (Entry){'m', 5, 10};
+    mt->entries[mt->count++] = (Entry){'n', 5, 9};
+    mt->entries[mt->count++] = (Entry){'o', 5, 18};
+    mt->entries[mt->count++] = (Entry){'p', 6, 17};
+    mt->entries[mt->count++] = (Entry){'q', 3, 18};
+    mt->entries[mt->count++] = (Entry){'r', 1, 14};
+    mt->entries[mt->count++] = (Entry){'s', 2, 18};
+    mt->entries[mt->count++] = (Entry){'t', 1, 18};
+    mt->entries[mt->count++] = (Entry){'u', 4, 14};
+    mt->entries[mt->count++] = (Entry){'v', 1, 15};
+    mt->entries[mt->count++] = (Entry){'w', 2, 16};
+    mt->entries[mt->count++] = (Entry){'x', 2, 9};
+    mt->entries[mt->count++] = (Entry){'y', 3, 15};
+    mt->entries[mt->count++] = (Entry){'z', 4, 18};
+    mt->entries[mt->count++] = (Entry){'1', 3, 13};
+    mt->entries[mt->count++] = (Entry){'2', 3, 14};
+    mt->entries[mt->count++] = (Entry){'3', 2, 15};
+    mt->entries[mt->count++] = (Entry){'4', 2, 10};
+    mt->entries[mt->count++] = (Entry){'5', 1, 10};
+    mt->entries[mt->count++] = (Entry){'6', 1, 17};
+    mt->entries[mt->count++] = (Entry){'7', 4, 17};
+    mt->entries[mt->count++] = (Entry){'8', 4, 10};
+    mt->entries[mt->count++] = (Entry){'9', 5, 17};
+    mt->entries[mt->count++] = (Entry){'0', 5, 15};
+    mt->entries[mt->count++] = (Entry){'ß', 6, 15};
+    mt->entries[mt->count++] = (Entry){'+', 7, 14};
+    mt->entries[mt->count++] = (Entry){'#', 7, 15};
+    mt->entries[mt->count++] = (Entry){''', 6, 16};
+    mt->entries[mt->count++] = (Entry){'.', 6, 9};
+    mt->entries[mt->count++] = (Entry){'-', 7, 18};
+    mt->entries[mt->count++] = (Entry){' ', 4, 9};
+    mt->entries[mt->count++] = (Entry){'´', 6, 10};
+};
+
+// Lookup function to get left and right pin values for the letter
+Entry* lookup(LetterMatrix* mt, char key) {
+        for (int i = 0; i < ht->count; i++) {
+        if (ht->entries[i].key == key) {
+            return &ht->entries[i];
+        }
+    }
+    return NULL; // Not found
+};
+
+// TODO: Implement special keys
+
+int main () {
+    bi_decl(bi_program_description("Blink"));
+    bi_decl(bi_1pin_with_name(LED_PIN, "Onboard LED"));
+
+    stdio_init_all();
+    gpio_init(LED_PIN);
+    gpio_set_dir(LED_PIN, GPIO_OUT);
+
+    while (1) {
+        gpio_put(LED_PIN, 1);
+        sleep_ms(1000);
+        gpio_put(LED_PIN, 0);
+        sleep_ms(1000);
+    }
+    return 0;
+}