picocalc_keyboard: add bootmode register

Code/picocalc_keyboard/keyboard.h

@@ -58,6 +58,10 @@ enum key_state
 #define KEY_F9 0x89
 #define KEY_F10 0x90
 
+#define BOOTMODE_DEFAULT  0x00 // normal boot mode
+#define BOOTMODE_SDCARD   0x01 // sdcard multiboot: loads .bin to FLASH+200K
+#define BOOTMODE_FWUPDATE 0x02 // enter BOOTSEL to upload .uf2 firmware
+
 typedef void (*key_callback)(char, enum key_state);
 typedef void (*lock_callback)(bool, bool);
 
@@ -66,6 +70,7 @@ void keyboard_set_key_callback(key_callback callback);
 void keyboard_set_lock_callback(lock_callback callback);
 bool keyboard_get_capslock(void);
 bool keyboard_get_numlock(void);
+uint8_t keyboard_get_bootmode(void);
 void keyboard_init(void);
 
 #define NUM_OF_COLS 8

Code/picocalc_keyboard/keyboard.ino

@@ -78,6 +78,8 @@ static struct {
 
     bool numlock_changed;
     bool numlock;
+
+    uint8_t bootmode;
 } self;
 
 void output_string(char*str){
@@ -423,6 +425,11 @@ bool keyboard_get_numlock(void)
   return self.numlock;
 }
 
+uint8_t keyboard_get_bootmode(void)
+{
+  return self.bootmode;
+}
+
 void keyboard_init(void)
 {
   struct port_config port_init;
@@ -431,6 +438,8 @@ void keyboard_init(void)
   for (int i = 0; i < MOD_LAST; ++i)
     self.mods[i] = false;
 
+  self.bootmode = BOOTMODE_DEFAULT;
+
   // Rows
   port_init.direction = PORT_PIN_DIR_INPUT;
   port_init.input_pull = PORT_PIN_PULL_UP;
@@ -449,5 +458,13 @@ void keyboard_init(void)
   port_init.input_pull = PORT_PIN_PULL_UP;
   for(uint32_t i = 0; i < NUM_OF_BTNS; ++i)
     port_pin_set_config(btn_pins[i], &port_init);
+
+  //B12=left,B11=down [FWUPDATE],B10=up [SDCARD-MULTIBOOT],B9=right
+  if (port_pin_get_input_level(btn_pins[10]) == 0) {
+    self.bootmode = BOOTMODE_FWUPDATE;
+  }
+  if (port_pin_get_input_level(btn_pins[9]) == 0) {
+    self.bootmode = BOOTMODE_SDCARD;
+  }
 #endif
 }

Code/picocalc_keyboard/picocalc_keyboard.ino

@@ -168,6 +168,11 @@ void receiveEvent(int howMany) {
       write_buffer[1] = js_bits;
       write_buffer_len = 2;
     }break;
+    case REG_ID_BOOT:{
+      write_buffer[0] = reg;
+      write_buffer[1] = keyboard_get_bootmode();
+      write_buffer_len = 2;
+    }break;
     default: {
       write_buffer[0] = 0;
       write_buffer[1] = 0;

Code/picocalc_keyboard/reg.h

@@ -19,6 +19,7 @@ enum reg_id
   REG_ID_BAT = 0x0b,// battery
   REG_ID_C64_MTX = 0x0c,// read c64 matrix
   REG_ID_C64_JS = 0x0d, // joystick io bits
+  REG_ID_BOOT = 0x0e, // boot mode (see keyboard.h)
   REG_ID_LAST,
 };
 

Code/picocalc_keyboard/reg.ino

@@ -1,4 +1,5 @@
 #include "reg.h"
+#include "keyboard.h"
 
 static uint8_t regs[REG_ID_LAST];
 
@@ -42,4 +43,5 @@ void reg_init(void)
   regs[REG_ID_BKL] = 255;//100%duty
   regs[REG_ID_BK2] = 0;
   regs[REG_ID_BAT] = 0; //default .no battery ,no charging
+  regs[REG_ID_BOOT] = BOOTMODE_DEFAULT;
 }