Support for atmega16m1, atmega32m1 and atmega64m1

optiboot/bootloaders/optiboot/Makefile.custom

@@ -13,3 +13,25 @@ wildfire:
 	mv $(PROGRAM)_$(CHIP).hex $(PROGRAM)_$(TARGET).hex
 	mv $(PROGRAM)_$(CHIP).lst $(PROGRAM)_$(TARGET).lst
 
+atmega16m1: MCU_TARGET = atmega16m1
+atmega16m1: CFLAGS += $(COMMON_OPTIONS)
+atmega16m1: AVR_FREQ = 16000000L
+atmega16m1: LDSECTIONS  = -Wl,--section-start=.text=0x3e00 -Wl,--section-start=.version=0x3ffc
+atmega16m1: $(PROGRAM)_atmega16m1.hex
+atmega16m1: $(PROGRAM)_atmega16m1.lst
+
+mega16m1: TARGET = mega16m1
+mega16m1: CHIP = atmega16m1
+mega16m1:
+	$(MAKE) $(CHIP) AVR_FREQ=16000000L LED=D0
+	mv $(PROGRAM)_$(CHIP).hex $(PROGRAM)_$(TARGET).hex
+	mv $(PROGRAM)_$(CHIP).lst $(PROGRAM)_$(TARGET).lst
+
+mega16m1_isp: mega16m1
+mega16m1_isp: TARGET = mega16m1
+mega16m1_isp: MCU_TARGET = atmega16m1
+mega16m1_isp: HFUSE = DE
+mega16m1_isp: LFUSE = DE
+mega16m1_isp: EFUSE = FF
+mega16m1_isp: isp
+

optiboot/bootloaders/optiboot/avrdude.rc

@@ -0,0 +1,30 @@
+# 
+# Archivo para agregar soporte del atmega16m1 al avrdude
+#
+# Para que este archivo sea reconocido hay que:
+# - En Windows: copiar este archivo (avrdude.rc) al mismo 
+#               directorio del programa avrdude.exe
+# - En Linux: copiar este archivo con el nombre .avrduderc
+#               en el directorio HOME
+#
+# http://www.nongnu.org/avrdude/user-manual/avrdude_10.html
+
+#------------------------------------------------------------
+# ATmega16m1
+#------------------------------------------------------------
+
+part parent "m328"
+    id              = "m16m1";
+    desc            = "ATmega16M1";
+    # stk500_devcode	= 0x;
+    # avr910_devcode	= 0x;
+    signature       = 0x1e 0x94 0x84;
+    bs2             = 0xe2;
+
+    memory "efuse"
+        read            = "0 1 0 1 0 0 0 0 0 0 0 0 1 0 0 0",
+                          "x x x x x x x x o o o o o o o o";
+        write           = "1 0 1 0 1 1 0 0 1 0 1 0 0 1 0 0",
+                          "x x x x x x x x x x i i i i i i";
+    ;
+;

optiboot/bootloaders/optiboot/optiboot.c

@@ -236,7 +236,7 @@
 #define OPTIBOOT_CUSTOMVER 0
 #endif
 
-unsigned const int __attribute__((section(".version"))) 
+unsigned const int __attribute__((section(".version")))
 optiboot_version = 256*(OPTIBOOT_MAJVER + OPTIBOOT_CUSTOMVER) + OPTIBOOT_MINVER;
 
 
@@ -288,8 +288,14 @@ optiboot_version = 256*(OPTIBOOT_MAJVER + OPTIBOOT_CUSTOMVER) + OPTIBOOT_MINVER;
 #define UART 0
 #endif
 
+#if defined(__AVR_ATmega16M1__) || defined(__AVR_ATmega32M1__) || defined(__AVR_ATmega64M1__)
+#define BAUD_SETTING ( (F_CPU)/(BAUD_RATE * 8L) - 1 )
+#define BAUD_ACTUAL (F_CPU/(8 * ((BAUD_SETTING)+1)))
+#else
 #define BAUD_SETTING (( (F_CPU + BAUD_RATE * 4L) / ((BAUD_RATE * 8L))) - 1 )
 #define BAUD_ACTUAL (F_CPU/(8 * ((BAUD_SETTING)+1)))
+#endif
+
 #if BAUD_ACTUAL <= BAUD_RATE
   #define BAUD_ERROR (( 100*(BAUD_RATE - BAUD_ACTUAL) ) / BAUD_RATE)
   #if BAUD_ERROR >= 5
@@ -306,14 +312,26 @@ optiboot_version = 256*(OPTIBOOT_MAJVER + OPTIBOOT_CUSTOMVER) + OPTIBOOT_MINVER;
   #endif
 #endif
 
+#if defined(__AVR_ATmega16M1__) || defined(__AVR_ATmega32M1__) || defined(__AVR_ATmega64M1__)
+// don't know how to choose the numbers
+#if BAUD_SETTING > ( (1 << 12) - 1 )
+#error Unachievable baud rate (too slow) BAUD_RATE
+#endif // baud rate slow check
+#if BAUD_SETTING < 3
+#if BAUD_ERROR != 0 // permit high bitrates (ie 1Mbps@16MHz) if error is zero
+#error Unachievable baud rate (too fast) BAUD_RATE
+#endif
+#endif // baud rate fastn check
+#else
 #if (F_CPU + BAUD_RATE * 4L) / (BAUD_RATE * 8L) - 1 > 250
-#error Unachievable baud rate (too slow) BAUD_RATE 
+#error Unachievable baud rate (too slow) BAUD_RATE
 #endif // baud rate slow check
 #if (F_CPU + BAUD_RATE * 4L) / (BAUD_RATE * 8L) - 1 < 3
 #if BAUD_ERROR != 0 // permit high bitrates (ie 1Mbps@16MHz) if error is zero
-#error Unachievable baud rate (too fast) BAUD_RATE 
+#error Unachievable baud rate (too fast) BAUD_RATE
 #endif
 #endif // baud rate fastn check
+#endif
 
 /* Watchdog settings */
 #define WATCHDOG_OFF    (0)
@@ -495,6 +513,13 @@ int main(void) {
   UCSRB = _BV(RXEN) | _BV(TXEN);  // enable Rx & Tx
   UCSRC = _BV(URSEL) | _BV(UCSZ1) | _BV(UCSZ0);  // config USART; 8N1
   UBRRL = (uint8_t)( (F_CPU + BAUD_RATE * 4L) / (BAUD_RATE * 8L) - 1 );
+#elif defined(__AVR_ATmega16M1__) || defined(__AVR_ATmega32M1__) || defined(__AVR_ATmega64M1__)
+  // USART 8N1, enable RX and TX
+  LINCR = (0 << LCONF1) | (0 << LCONF0) | (0 << LENA) | (1 << LCMD2) | (1 << LCMD1) | (1 << LCMD0);
+  LINENIR = 0; // disable interrupts
+  LINBTR = (1 << LDISR) | 8; // 8 samples per bit
+  LINBRR = (uint16_t)( F_CPU/(8*BAUD_RATE)-1);
+  LINCR |= (1 << LENA);
 #else
   UART_SRA = _BV(U2X0); //Double speed mode USART0
   UART_SRB = _BV(RXEN0) | _BV(TXEN0);
@@ -684,8 +709,13 @@ int main(void) {
 
 void putch(char ch) {
 #ifndef SOFT_UART
+#if defined(__AVR_ATmega16M1__) || defined(__AVR_ATmega32M1__) || defined(__AVR_ATmega64M1__)
+  while ( LINSIR & _BV(LBUSY));
+  LINDAT = ch;
+#else
   while (!(UART_SRA & _BV(UDRE0)));
   UART_UDR = ch;
+#endif
 #else
   __asm__ __volatile__ (
     "   com %[ch]\n" // ones complement, carry set
@@ -748,6 +778,23 @@ uint8_t getch(void) {
     :
       "r25"
 );
+#else
+#if defined(__AVR_ATmega16M1__) || defined(__AVR_ATmega32M1__) || defined(__AVR_ATmega64M1__)
+while(!(LINSIR & _BV(LRXOK)))
+  ;
+if (!(LINERR & _BV(LFERR))) {
+    /*
+     * A Framing Error indicates (probably) that something is talking
+     * to us at the wrong bit rate.  Assume that this is because it
+     * expects to be talking to the application, and DON'T reset the
+     * watchdog.  This should cause the bootloader to abort and run
+     * the application "soon", if it keeps happening.  (Note that we
+     * don't care that an invalid char is returned...)
+     */
+  watchdogReset();
+}
+
+ch = LINDAT;
 #else
   while(!(UART_SRA & _BV(RXC0)))
     ;
@@ -765,6 +812,7 @@ uint8_t getch(void) {
 
   ch = UART_UDR;
 #endif
+#endif
 
 #ifdef LED_DATA_FLASH
 #if defined(__AVR_ATmega8__) || defined (__AVR_ATmega32__) || defined (__AVR_ATmega16__)