update

attic/due-#010 - blink direct muti-target/main.cpp

@@ -0,0 +1,45 @@
+// ==========================================================================
+//
+// blink the LED on an Arduino Due
+//
+// (c) Wouter van Ooijen (wouter@voti.nl) 2017
+//
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy at 
+// http://www.boost.org/LICENSE_1_0.txt) 
+//
+// ==========================================================================
+
+#include "hwlib.hpp"
+
+int main( void ){   
+
+   if constexpr ( hwlib::target_board == hwlib::target_boards::arduino_uno ){
+
+      DDRB |= ( 0b01 << 5 );
+      for(;;){
+         PORTB &= ~( 0b01 << 5 );
+         for( volatile uint32_t i = 0; i < 50'000; ++i );
+         PORTB |= ( 0b01 << 5 );
+         for( volatile uint32_t i = 0; i < 50'000; ++i );
+      }      
+
+   } else if constexpr ( hwlib::target_board == hwlib::target_boards::arduino_due ){
+
+      PIOB->PIO_OER = 0x01 << 27;
+      for(;;){
+         PIOB->PIO_SODR = 0x01 << 27;
+         for( volatile int i = 0; i < 100'000; i++ ){}
+         IOB->PIO_CODR = 0x01 << 27;
+         for( volatile int i = 0; i < 100'000; i++ ){}
+      }    
+
+   } else {
+
+       void no_blink_variation_for_this_target();
+       no_blink_variation_for_this_target();
+
+   }
+
+}
+

attic/due-#010 - blink direct muti-target/makefile

@@ -0,0 +1,25 @@
+#============================================================================
+#
+# simple project makefile (just a main file)
+#
+# (c) Wouter van Ooijen (wouter@voti.nl) 2017
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at 
+# http://www.boost.org/LICENSE_1_0.txt) 
+#
+#============================================================================
+
+# source files in this project (main.* is automatically assumed)
+SOURCES :=
+
+# header files in this project
+HEADERS :=
+
+# other places to look for files for this project
+SEARCH  := 
+
+# set RELATIVE to the next higher directory 
+# and defer to the appropriate Makefile.* there
+RELATIVE := ..
+include $(RELATIVE)/makefile.link

demo/arduino-due/due-#089 - constexpr/main.cpp

@@ -0,0 +1,36 @@
+#include "hwlib.hpp"
+
+namespace target = hwlib::target;
+
+constexpr double pow( double v, int n ){
+   return ( n == 0 ) 
+      ? 1 
+      : v * pow( v, n - 1 );
+}
+
+constexpr int fac( int n ){
+   return ( n ==  0 ) 
+      ? 1 
+      : n * fac( n - 1 );
+}
+
+constexpr double sine( double angle ){
+   double value = 0;
+   for( int i = 1; i < 10; i += 2 ){
+      value += (( i % 4 ) == 1 ? 1 : -1 ) * pow( angle, i ) / fac( i );
+   }   
+   return value;
+}
+
+constexpr double pi = 3.14;
+
+constexpr int height = static_cast< int >( 1000 * sine( 2 * pi / 12 ));
+
+int main( void ){
+
+   // wait for the terminal emulator to start up
+   hwlib::wait_ms( 1'000 );
+
+   hwlib::cout << "1000 * sin( 30 ) = " << height << "\n";
+
+}

demo/arduino-due/due-#089 - constexpr/makefile

@@ -0,0 +1,28 @@
+#============================================================================
+#
+# simple project makefile (just a main file)
+#
+# (c) Wouter van Ooijen (wouter@voti.nl) 2017
+#
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at 
+# http://www.boost.org/LICENSE_1_0.txt) 
+#
+#============================================================================
+
+# source files in this project (main.* is automatically assumed)
+SOURCES :=
+
+# header files in this project
+HEADERS :=
+
+# other places to look for files for this project
+SEARCH  := 
+
+# other things to build
+RESULTS := main.lss main.lst
+
+# set RELATIVE to the next higher directory 
+# and defer to the appropriate Makefile.* there
+RELATIVE := ..
+include $(RELATIVE)/makefile.link

demo/arduino-uno/__codelite.workspace

@@ -12,7 +12,7 @@
       <Project Name="001 - two" ConfigName="Release"/>
     </WorkspaceConfiguration>
   </BuildMatrix>
-  <Project Name="010 - blink - direct" Path="010 - blink - direct/_codelite.project" Active="No"/>
+  <Project Name="010 - blink - direct" Path="010 - blink - direct/_codelite.project" Active="Yes"/>
   <BuildMatrix>
     <WorkspaceConfiguration Name="Release" Selected="yes">
       <Project Name="010 - blink - direct" ConfigName="Release"/>
@@ -42,7 +42,7 @@
       <Project Name="031 - uart - input" ConfigName="Release"/>
     </WorkspaceConfiguration>
   </BuildMatrix>
-  <Project Name="lcd - scrolling message" Path="lcd - scrolling message/_codelite.project" Active="Yes"/>
+  <Project Name="lcd - scrolling message" Path="lcd - scrolling message/_codelite.project" Active="No"/>
   <BuildMatrix>
     <WorkspaceConfiguration Name="Release" Selected="yes">
       <Project Name="lcd - scrolling message" ConfigName="Release"/>

library/core/hwlib-targets.hpp

@@ -0,0 +1,33 @@
+// ==========================================================================
+//
+// File      : hwlib-targets.hpp
+// Part of   : C++ hwlib library for close-to-the-hardware OO programming
+// Copyright : wouter@voti.nl 2017-2019
+//
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy at 
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+// ==========================================================================
+
+// included only via hwlib.hpp, hence no multiple-include guard is needed
+
+// this file contains Doxygen lines
+/// @file
+
+namespace hwlib {
+
+enum class target_boards {
+   none,
+   arduino_uno,
+   arduino_due,
+   blue_pill
+};
+
+enum class target_chips {
+   atmega328p,
+   atsam3x8e,
+   stm32f103c8
+};
+
+}; // namespace hwlib   

library/hwlib-all.hpp

@@ -31,6 +31,7 @@
 #include <type_traits>
 
 #include HWLIB_INCLUDE( core/hwlib-defines.hpp )
+#include HWLIB_INCLUDE( core/hwlib-targets.hpp )
 #include HWLIB_INCLUDE( core/hwlib-panic.hpp )
 #include HWLIB_INCLUDE( core/hwlib-common.hpp )
 #include HWLIB_INCLUDE( core/hwlib-wait.hpp )

library/peripherals/hwlib-hc595.hpp

@@ -102,7 +102,7 @@ class hc595 : public port_out {
       return 8;
    }   
 
-   void write( uint_fast8_t x ) override {
+   void write( uint_fast16_t x ) override {
       write_buffer = x; 
    }  
 

library/peripherals/hwlib-pcf8574.hpp

@@ -113,12 +113,12 @@ class pcf8574 : public port_oc {
       return 8;
    }   
 
-   void write( uint_fast8_t x ) override {
+   void write( uint_fast16_t x ) override {
       write_buffer = x; 
       dirty = true;
    }  
 
-   uint_fast8_t read() override {
+   uint_fast16_t read() override {
       return read_buffer;  
    }  
 

library/ports/hwlib-port-direct.hpp

@@ -46,12 +46,12 @@ class port_direct_from_in_out_t : public port_in_out {
       return slave.number_of_pins();
    }	  
 
-   void write( uint_fast8_t  v ) override {
+   void write( uint_fast16_t  v ) override {
       slave.write( v );
       slave.flush();
    }
 
-   uint_fast8_t  read() override { 
+   uint_fast16_t read() override { 
       slave.refresh();
       return slave.read();
    }
@@ -106,7 +106,7 @@ class port_direct_from_in_t : public port_in {
       return slave.number_of_pins();
    }	  
 
-   uint_fast8_t  read() override { 
+   uint_fast16_t  read() override { 
       slave.refresh();
       return slave.read();
    }
@@ -145,7 +145,7 @@ class port_direct_from_out_t : public port_out {
       return slave.number_of_pins();
    }	  
 
-   void write( uint_fast8_t  v ) override {
+   void write( uint_fast16_t  v ) override {
       slave.write( v );
 	  slave.flush();
    }
@@ -184,12 +184,12 @@ class port_direct_from_oc_t : public port_oc {
       return slave.number_of_pins();
    }	  
 
-   void write( uint_fast8_t  v ) override {
+   void write( uint_fast16_t  v ) override {
       slave.write( v );
 	  slave.flush();
    }
 
-   uint_fast8_t read() override { 
+   uint_fast16_t read() override { 
       slave.refresh();
       return slave.read();
    }