Added defined for __STM32F1XX__ to board.txt in preparation for changes to OneWire library. Also added analogWrite function to replicate what the Arduino API does, and fix the issue with needing to call pinMode with type PWM. Fade example now works, as long as a PWM compatible pin is used e.g. PA0

STM32F1XX/boards.txt

@@ -17,7 +17,7 @@ maple.upload.auto_reset=true
 maple.build.mcu=cortex-m3
 maple.build.f_cpu=72000000L
 maple.build.core=maple
-maple.build.extra_flags=-DMCU_STM32F103RB -mthumb -DSTM32_MEDIUM_DENSITY -DBOOTLOADER_maple -march=armv7-m    
+maple.build.extra_flags=-DMCU_STM32F103RB -mthumb -DSTM32_MEDIUM_DENSITY -DBOOTLOADER_maple -march=armv7-m  -D__STM32F1XX__  
 maple.build.ldscript=ld/flash.ld
 maple.build.variant=maple
 maple.build.variant_system_lib=libmaple.a
@@ -43,7 +43,7 @@ mapleRAM.upload.auto_reset=true
 mapleRAM.build.mcu=cortex-m3
 mapleRAM.build.f_cpu=72000000L
 mapleRAM.build.core=maple
-mapleRAM.build.extra_flags=-DMCU_STM32F103RB -mthumb -MD -DSTM32_MEDIUM_DENSITY -DBOOTLOADER_maple -march=armv7-m
+mapleRAM.build.extra_flags=-DMCU_STM32F103RB -mthumb -MD -DSTM32_MEDIUM_DENSITY -DBOOTLOADER_maple -march=armv7-m -D__STM32F1XX__ 
 mapleRAM.build.ldscript=ld/ram.ld
 mapleRAM.build.variant=maple
 mapleRAM.build.variant_system_lib=libmaple.a
@@ -70,7 +70,7 @@ maple_mini.upload.auto_reset=true
 maple_mini.build.mcu=cortex-m3
 maple_mini.build.f_cpu=72000000L
 maple_mini.build.core=maple
-maple_mini.build.extra_flags=-DMCU_STM32F103CB -mthumb -MD -DSTM32_MEDIUM_DENSITY -DBOOTLOADER_maple -march=armv7-m
+maple_mini.build.extra_flags=-DMCU_STM32F103CB -mthumb -MD -DSTM32_MEDIUM_DENSITY -DBOOTLOADER_maple -march=armv7-m -D__STM32F1XX__ 
 maple_mini.build.ldscript=ld/flash.ld
 maple_mini.build.variant=maple_mini
 maple_mini.build.variant_system_lib=libmaple.a
@@ -96,7 +96,7 @@ mapleRAM.upload.auto_reset=true
 maple_miniRAM.build.mcu=cortex-m3
 maple_miniRAM.build.f_cpu=72000000L
 maple_miniRAM.build.core=maple
-mapleRAM.build.extra_flags=-DMCU_STM32F103CB -mthumb -MD -DSTM32_MEDIUM_DENSITY -DBOOTLOADER_maple -march=armv7-m
+mapleRAM.build.extra_flags=-DMCU_STM32F103CB -mthumb -MD -DSTM32_MEDIUM_DENSITY -DBOOTLOADER_maple -march=armv7-m -D__STM32F1XX__ 
 mapleRAM.build.ldscript=ld/ram.ld
 mapleRAM.build.variant=maple_mini
 mapleRAM.build.variant_system_lib=libmaple.a
@@ -123,7 +123,7 @@ maple_STM32.upload.auto_reset=true
 maple_STM32.build.mcu=cortex-m3
 maple_STM32.build.f_cpu=72000000L
 maple_STM32.build.core=maple
-maple_STM32.build.extra_flags=-DMCU_STM32F103CB -mthumb -MD -DSTM32_MEDIUM_DENSITY  -march=armv7-m 
+maple_STM32.build.extra_flags=-DMCU_STM32F103CB -mthumb -MD -DSTM32_MEDIUM_DENSITY  -march=armv7-m  -D__STM32F1XX__ 
 maple_STM32.build.ldscript=ld/jtag.ld
 maple_STM32.build.variant=maple_mini
 maple_STM32.build.variant_system_lib=libmaple.a

STM32F1XX/cores/maple/pwm.cpp

@@ -36,6 +36,7 @@
 #include <libmaple/timer.h>
 
 #include "boards.h"
+#include "io.h"
 
 void pwmWrite(uint8 pin, uint16 duty_cycle) {
     if (pin >= BOARD_NR_GPIO_PINS) {
@@ -46,3 +47,15 @@ void pwmWrite(uint8 pin, uint16 duty_cycle) {
     ASSERT(dev && cc_channel);
     timer_set_compare(dev, cc_channel, duty_cycle);
 }
+
+/*
+ * Roger Clark. Added new function to replicate more closely what the Arduino API does
+ * Note. This implementation is currently slower than it could be, 
+ * because pinMode needs to be called to set the special (new) mode of PWM
+ * Some optimisation may be possible with pinMode or even in this function
+ */
+void analogWrite(uint8 pin, int duty_cycle8)
+{
+	pinMode(pin,PWM);
+	pwmWrite(pin,duty_cycle8 * 257);// 257 maps 255 to 65535 (i.e 255*257 = 65535)
+}

STM32F1XX/cores/maple/pwm.h

@@ -34,13 +34,6 @@
 
 #include <libmaple/libmaple_types.h>
 
-/**
- * As a convenience, analogWrite is an alias of pwmWrite to ease
- * porting Arduino code.  However, period and duty will have to be
- * recalibrated.
- */
-#define analogWrite pwmWrite
-
 /**
  * Set the PWM duty on the given pin.
  *
@@ -48,9 +41,19 @@
  * (based on the configured period).
  *
  * @param pin PWM output pin
- * @param duty_cycle Duty cycle to set.
+ * @param duty_cycle Duty cycle to set. (Range is 0 to 65535)
  */
-void pwmWrite(uint8 pin, uint16 duty_cycle);
+void pwmWrite(uint8 pin, uint16 duty_cycle16);
 
+/**
+ * Roger Clark. 20140103
+ * Added function to replicate the Arduino PWM functionality or range 0 to 255 
+ * User code is expected to determine and honor the maximum value
+ * (based on the configured period).
+ *
+ * @param pin PWM output pin
+ * @param duty_cycle Duty cycle to set. (Range is 0 to 255)
+ */
+void analogWrite(uint8 pin, int duty_cycle8);
 #endif
 

STM32F1XX/cores/maple/wirish_types.h

@@ -55,6 +55,7 @@ typedef struct stm32_pin_info {
     uint8 gpio_bit;             /**< Pin's GPIO port bit. */
     uint8 timer_channel;        /**< Timer channel, or 0 if none. */
     uint8 adc_channel;          /**< Pin ADC channel, or ADCx if none. */
+	uint8 pinMode; 				/**< mode specific by pinMode call (Roger Clark added to optimize compatibility with Arduino API*/
 } stm32_pin_info;
 
 /**