v0.2.1 with FlashStringHelper

Author: nerdralph

avr/boards.txt

@@ -8,12 +8,14 @@ picocore.upload.using=avrdude
 picocore.bootloader.unlock_bits=0x3f
 picocore.bootloader.lock_bits=0x3e
 picocore.build.core=picocore
+# board name will be used for macro define
 picocore.build.board=attiny
 # build flags are for compile only, not link
 #picocore.build.extra_flags={build.timing}
 
-#picocore.upload.maximum_data_size=64
+#picocore.upload.maximum_size=1024
 #picocore.build.mcu_compile=attiny13a
+#picocore.build.mcu=attiny13a
 #picocore.build.variant=attiny13
 
 # default clock = 8Mhz
@@ -23,6 +25,7 @@ menu.mcu=MCU
 
 picocore.menu.mcu.t13=ATtiny13
 picocore.menu.mcu.t13.build.mcu=attiny13
+#picocore.menu.mcu.t13.build.variant=attiny13
 picocore.menu.mcu.t13.build.f_cpu=9600000L
 picocore.menu.mcu.t13.upload.maximum_size=1024
 

avr/cores/picocore/Arduino.h

@@ -3,6 +3,7 @@
  * 20200310 add digital pin functions 
  * 20200301 prototype 
  * 20200319 v0.2beta with analogRead/Write & WDT millis()
+ * 20200416 v0.2.1 with FlashStringHelper & portxxxxRegister functions
  */
 
 #pragma once
@@ -13,6 +14,10 @@
 #include <util/delay.h>
 #include "constants.h"
 
+#define min(a,b) ((a)<(b)?(a):(b))
+#define max(a,b) ((a)>(b)?(a):(b))
+#define abs(x) __builtin_abs(x)
+
 #ifdef __cplusplus
 class __FlashStringHelper;
 #define F(string_literal) (reinterpret_cast<const __FlashStringHelper *>(PSTR(string_literal)))

avr/cores/picocore/constants.h

@@ -3,8 +3,10 @@
 
 static const uint8_t LOW = 0;
 static const uint8_t HIGH = 1;
-static const uint8_t LED_BUILTIN = 2;
-static const uint8_t NUM_DIGITAL_PINS = 6;
+//static const uint8_t LED_BUILTIN = 2;
+enum {LED_BUILTIN = 2};
+//static const uint8_t NUM_DIGITAL_PINS = 6;
+enum {NUM_DIGITAL_PINS = 6};
 
 typedef enum {MSBFIRST = 0, LSBFIRST} _bitOrder;
 

avr/cores/picocore/pcrt.S

@@ -50,6 +50,7 @@ __init:
     clr r1
 
     .section .init9
+    .global main
 ; main must go in .init9 to save rjmp
 ;    rjmp main
 

avr/platform.txt

@@ -12,7 +12,8 @@ version=0.1.0
 # AVR compile variables
 # ---------------------
 
-compiler.warning_flags=-w
+#compiler.warning_flags=-w
+compiler.warning_flags=
 compiler.warning_flags.none=-w
 compiler.warning_flags.default=
 compiler.warning_flags.more=-Wall
@@ -38,7 +39,7 @@ compiler.objcopy.cmd=avr-objcopy
 compiler.objcopy.eep.flags=-O ihex -j .eeprom --set-section-flags=.eeprom=alloc,load --no-change-warnings --change-section-lma .eeprom=0
 compiler.elf2hex.flags=-O ihex -R .eeprom
 compiler.elf2hex.cmd=avr-objcopy
-compiler.ldflags=
+#compiler.ldflags=
 compiler.size.cmd=avr-size
 
 # This can be overridden in boards.txt
@@ -47,7 +48,7 @@ build.extra_flags=
 # These can be overridden in platform.local.txt
 compiler.c.extra_flags=
 # force linker to search for __vectors (in pcrt)
-compiler.c.elf.extra_flags=-nostartfiles -Wl,--undefined=__vectors -Wl,--undefined=main
+compiler.c.elf.extra_flags=-nostartfiles -Wl,--undefined=__vectors
 compiler.S.extra_flags=
 compiler.cpp.extra_flags=
 compiler.ar.extra_flags=