[firmware] imported codebase after a bit of cleanup

Author: giuliof

firmware/.gitignore

@@ -0,0 +1,8 @@
+.vscode/
+
+build/
+output/
+
+*.hex
+*.lss
+*.bin

firmware/main.cpp

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+/**
+ * @file main.c
+ * @author Giulio (giulio@glgprograms.it)
+ * @brief Kickstart and setup code
+ * @version 0.1
+ * @date 2022-03-03
+ *
+ * @copyright Copyright (c) 2022
+ *
+ */
+
+#include <avr/interrupt.h>
+#include <avr/io.h>
+#include <util/delay.h>
+
+#include "src/clock.h"
+#include "src/floppy_main.h"
+#include "src/prompt.h"
+#include "util/port.h"
+
+#include "src/sdcard.h"
+#include "src/sdcard_gpio.h"
+#include "src/sdcard_nic.h"
+#include "src/sdcard_fat.h"
+
+#include "src/oled_gui.h"
+#include "src/oled_lcd.h"
+#include "src/encoder.h"
+
+#include "debug.h"
+
+// Enable GUI
+#define DISPLAY_ENABLED (true)
+
+static void cli_mainloop() __attribute__((noreturn));
+static void gui_mainloop() __attribute__((noreturn));
+static void display_update_file_list(uint16_t fat_idx);
+
+int main()
+{
+  // If display is not connected or disabled, use CLI
+  bool cli_mode = true;
+
+  // Set up PLL to reach desired clock speed
+  clk_init();
+
+  // Configure SDcard I/O
+  sdcard_init();
+
+  // Configure prompt uart
+  prompt_init();
+
+  // Configure floppy
+  floppy_init();
+
+  // Initialize OLED display
+  if (DISPLAY_ENABLED)
+    cli_mode = !oled_init();
+
+  PMIC.CTRL |= PMIC_HILVLEN_bm | PMIC_MEDLVLEN_bm | PMIC_LOLVLEN_bm;
+  sei();
+
+  if (cli_mode)
+    cli_mainloop();
+  else
+    gui_mainloop();
+}
+
+static void cli_mainloop()
+{
+  while (1)
+  {
+    prompt_main();
+
+    // Do nothing if drive is disabled
+    if (floppy_drive_enabled() && nic_file_selected())
+    {
+      debug_printP(PSTR("Reading enabled\n\r"));
+      floppy_main();
+    }
+  }
+}
+
+static void gui_mainloop()
+{
+  encoder_init();
+
+  // Currently "hovered" fat entry
+  uint16_t fat_entry;
+  // Currently selected folder and file names
+  char file_name[FAT_FILENAME_STRLEN] = "";
+  char cwd_name[FAT_FILENAME_STRLEN] = "";
+
+  oled_gui_volume_name(NULL, false);
+
+  while (1)
+  {
+    if (!sdcard_present())
+    {
+      oled_gui_error("Please insert an SD card");
+
+      while (!sdcard_present())
+        ;
+      // "Debouncing", assure that card is correctly inserted
+      _delay_ms(500);
+    }
+
+    oled_gui_error("Initializing SD card, please wait");
+
+    // Initialize SD card
+    if (!sdcard_card_init() || !sdcard_fat_init())
+    {
+      oled_gui_error("Error: SDcard failed in initialization");
+      // Must remove SDcard to proceed
+      while (sdcard_present())
+        ;
+
+      continue;
+    }
+
+    oled_gui_volume_name(NULL, sdcard_locked());
+    oled_gui_cwd_currentfile(NULL, NULL);
+
+    // Populate file list on home screen
+    fat_entry = 0xFFFF;
+    // TODO if fail, error: no file in this SDCARD
+    fat_next(&fat_entry);
+    display_update_file_list(fat_entry);
+
+    while (sdcard_present())
+    {
+      int8_t delta = encoder_update();
+      // Update file pointer and eventually update file list
+      if (delta != 0)
+      {
+        if (delta > 0) fat_next(&fat_entry);
+        if (delta < 0) fat_prev(&fat_entry);
+        display_update_file_list(fat_entry);
+      }
+
+      if (encoder_clicked())
+      {
+        if (fat_is_directory(fat_entry))
+        {
+          // Get directory name
+          fat_get_entry_name(cwd_name, fat_entry);
+          // Enter in directory
+          fat_cwd(fat_entry);
+          // Reset pointer in directory entry table, then validate for first file
+          fat_entry = 0xFFFF;
+          fat_next(&fat_entry);
+          // Update display with folder content
+          display_update_file_list(fat_entry);
+        }
+        else
+        {
+          bool ro = sdcard_locked() || fat_is_ro(fat_entry);
+          nic_build_fat(fat_entry);
+          floppy_write_protect(ro);
+          fat_get_entry_name(file_name, fat_entry);
+          // FIXME strip extension
+          for(uint8_t i = 0; i <= 8; i++)
+            if (file_name[i] == '.')
+            {
+              file_name[i] = '\0';
+              break;
+            }
+        }
+        oled_gui_cwd_currentfile(cwd_name, file_name);
+      }
+
+      // Do nothing if drive is disabled
+      if (floppy_drive_enabled() && nic_file_selected())
+      {
+        debug_printP(PSTR("Reading enabled\n\r"));
+
+        oled_gui_set_busyflag(true);
+
+        // While floppy is selected, floppy_main will never return
+        floppy_main();
+
+        oled_gui_set_busyflag(false);
+      }
+    }
+  }
+}
+
+static void display_update_file_list(uint16_t fat_idx)
+{
+  // Invert for first file (hovered)
+  oled_invert(true);
+
+  int i;
+
+  for (i = 0; i < 6; i++)
+  {
+    char filename[FAT_FILENAME_STRLEN];
+
+    fat_get_entry_name(filename, fat_idx);
+
+    oled_gui_fileline(filename, fat_is_directory(fat_idx), fat_is_ro(fat_idx), i);
+
+    oled_invert(false);
+
+    // If no more files, clean lines then stop
+    if (!fat_next(&fat_idx)) break;
+  }
+
+  for (i++; i < 6; i++)
+    oled_gui_fileline(NULL, false, false, i);
+}