From ecafd0c25665044a0e1d7da9077b7184628d52fb Mon Sep 17 00:00:00 2001
From: Ronald Schaten <ronald@schatenseite.de>
Date: Sat, 25 Oct 2008 19:29:11 +0000
Subject: [PATCH] prepared bootloader for use with Sun Type 5 keyboard

---
 bootloader/Makefile           |  4 +-
 bootloader/bootloaderconfig.h | 96 ++++++++++++++++++++++++++++++++++-
 2 files changed, 98 insertions(+), 2 deletions(-)

diff --git a/bootloader/Makefile b/bootloader/Makefile
index 04fd23c..2e9abd1 100644
--- a/bootloader/Makefile
+++ b/bootloader/Makefile
@@ -22,7 +22,9 @@ AVRDUDE = avrdude $(PROGRAMMER) -p $(DEVICE)
 CC = avr-gcc
 
 # Options:
-DEFINES = #-DDEBUG_LEVEL=2
+DEFINES = -DMODELIBMMODELM
+#DEFINES = -DMODELSUNTYPE5
+
 CFLAGS = -Wall -Os -I. -mmcu=$(DEVICE) -DF_CPU=$(F_CPU) $(DEFINES)
 LDFLAGS = -Wl,--section-start=.text=$(BOOTLOADER_ADDRESS)
 
diff --git a/bootloader/bootloaderconfig.h b/bootloader/bootloaderconfig.h
index ec0618e..3d382e5 100644
--- a/bootloader/bootloaderconfig.h
+++ b/bootloader/bootloaderconfig.h
@@ -115,6 +115,15 @@
 
 #ifndef __ASSEMBLER__   /* assembler cannot parse function definitions */
 
+#ifdef MODELSUNTYPE5
+#   define SRCLOCKON    PORTC |= (1 << PC5)
+#   define SRCLOCKOFF   PORTC &= ~(1 << PC5)
+#   define SRDATAON     PORTC |= (1 << PC6)
+#   define SRDATAOFF    PORTC &= ~(1 << PC6)
+#   define SRSTROBEON   PORTC |= (1 << PC7)
+#   define SRSTROBEOFF  PORTC &= ~(1 << PC7)
+#   define KEYROW 6
+#endif
 uint8_t ledcounter = 0; ///< counter used to set the speed of the running light
 uint8_t ledstate = 0;   ///< state of the running light
 
@@ -122,25 +131,67 @@ uint8_t ledstate = 0;   ///< state of the running light
  * Prepare IO-ports for detection of bootloader-condition, which happens in
  * bootLoaderCondition().
  */
+#ifdef MODELIBMMODELM
 static inline void bootLoaderInit(void) {
     // switch on leds
     DDRD  |= (1 << PIND4) | (1 << PIND5) | (1 << PIND6);
     PORTD &= ~((1 << PIND4) | (1 << PIND5) | (1 << PIND6));
     // choose matrix position for hotkey. we use KEY_KPminus, so we set row 13
-    // and later look for pin 7
+    // and later look for column 7
     DDRA  = 0x00;
     PORTA = 0xff;
     DDRC  = (1 << DDC2);
     PORTC = ~(1 << PINC2);
 }
+#endif
+#ifdef MODELSUNTYPE5
+static inline void bootLoaderInit(void) {
+    // configure ports
+    DDRA = 0x00;
+    PORTA = 0xff;
+    DDRB = (1 << PB4) |(1 << PB5) | (1 << PB6) | (1 << PB7);
+    PORTB = (1 << PB0) | (1 << PB1) | (1 << PB2) | (1 << PB3);
+    DDRC = (1 << PC5) | (1 << PC6) | (1 << PC7);
+    PORTC = (1 << PC0) | (1 << PC1) | (1 << PC2) | (1 << PC3) | (1 << PC4);
+    DDRD &= ~((1 << PD4) | (1 << PD5) | (1 << PD6) | (1 << PD7));
+    PORTD |= (1 << PD4) | (1 << PD5) | (1 << PD6) | (1 << PD7);
+
+    // switch on leds
+    PORTB &= ~((1 << PB4) | (1 << PB5) | (1 << PB6) | (1 << PB7));
+
+    // choose matrix position for hotkey. we use KEY_KPminus, so we set all
+    // rows to 1 except for row 6 (KEYROW) and later look for column 6
+    SRDATAON;
+    SRSTROBEOFF;
+    uint8_t i = 0;
+    for (i = 0; i < (21 - KEYROW); i++) {
+        SRCLOCKON; SRCLOCKOFF;
+    }
+    SRDATAOFF;
+    SRCLOCKON; SRCLOCKOFF;
+    SRDATAON;
+    for (i = 0; i < KEYROW; i++) {
+        SRCLOCKON; SRCLOCKOFF;
+    }
+    SRSTROBEON; SRSTROBEOFF;
+}
+#endif
 
 /**
  * Clean up after boot loader action. In this case: switch off all LEDs.
  */
+#ifdef MODELIBMMODELM
 static inline void bootLoaderExit(void) {
     // switch off leds
     PORTD |= (1 << PIND4) | (1 << PIND5) | (1 << PIND6);
 }
+#endif
+#ifdef MODELSUNTYPE5
+static inline void bootLoaderExit(void) {
+    // switch off leds
+    PORTB |= (1 << PB4) | (1 << PB5) | (1 << PB6) | (1 << PB7);
+}
+#endif
 
 /**
  * Check if conditions for boot loader are met. This function is called in an
@@ -148,6 +199,7 @@ static inline void bootLoaderExit(void) {
  * the LEDs.
  * \return 1 if bootloader should be active, 0 otherwise
  */
+#ifdef MODELIBMMODELM
 static inline uint8_t bootLoaderCondition() {
     // look for pin 7
     if (!(PINB & (1 << PINB7))) {
@@ -182,6 +234,48 @@ static inline uint8_t bootLoaderCondition() {
         return 0;
     }
 }
+#endif
+#ifdef MODELSUNTYPE5
+static inline uint8_t bootLoaderCondition() {
+    // look for pin 7
+    if (!(PINA & (1 << PINA6))) {
+        // boot loader active, blink leds
+        _delay_ms(1);
+        ledcounter++;
+        if (ledcounter == 127) {
+            switch (ledstate) {
+                case 0:
+                    PORTB &= ~(1 << PINB7);
+                    PORTB |= (1 << PINB4) | (1 << PINB5) | (1 << PINB6);
+                    ledstate = 1;
+                    break;
+                case 1:
+                    PORTB &= ~(1 << PINB6);
+                    PORTB |= (1 << PINB4) | (1 << PINB5) | (1 << PINB7);
+                    ledstate = 2;
+                    break;
+                case 2:
+                    PORTB &= ~(1 << PINB5);
+                    PORTB |= (1 << PINB4) | (1 << PINB6) | (1 << PINB7);
+                    ledstate = 3;
+                    break;
+                case 3:
+                    PORTB &= ~(1 << PINB4);
+                    PORTB |= (1 << PINB5) | (1 << PINB6) | (1 << PINB7);
+                    ledstate = 0;
+                    break;
+                default:
+                    ledstate = 0;
+            }
+            ledcounter = 0;
+        }
+        return 1;
+    } else {
+        // no boot loader
+        return 0;
+    }
+}
+#endif
 
 #endif /* __ASSEMBLER__ */