fixed float printf for F303

F3:F303/floatPrintf/Makefile

@@ -1,4 +1,4 @@
-BINARY		= usart1
+BINARY		= float
 BOOTPORT	?= /dev/ttyUSB0
 BOOTSPEED	?= 115200
 # MCU FAMILY
@@ -9,12 +9,10 @@ MCU			?= F303xb
 ARMARCH = __ARM_ARCH_7M__
 # change this linking script depending on particular MCU model,
 LDSCRIPT	?= stm32f303xB.ld
-# debug
-#DEFS		= -DEBUG
 
 INDEPENDENT_HEADERS=
 
-FP_FLAGS	?= -mfpu=fpv4-sp-d16 -mfloat-abi=softfp -fsingle-precision-constant -mlittle-endian -DARM_MATH_CM4
+FP_FLAGS	?= -mfpu=fpv4-sp-d16 -mfloat-abi=hard -fsingle-precision-constant -mlittle-endian -DARM_MATH_CM4
 ASM_FLAGS	?= -mthumb -mcpu=cortex-m4
 ARCH_FLAGS	= $(ASM_FLAGS) $(FP_FLAGS) -D $(ARMARCH)
 
@@ -42,6 +40,8 @@ DFUUTIL		:= $(shell which dfu-util)
 ###############################################################################
 # Source files
 OBJDIR 		:= mk
+# target (debug/release)
+TARGFILE := $(OBJDIR)/TARGET
 SRC			:= $(wildcard *.c)
 OBJS		:= $(addprefix $(OBJDIR)/, $(SRC:%.c=%.o))
 STARTUP		:= $(OBJDIR)/startup.o
@@ -59,16 +59,15 @@ LIB_DIR		:= $(INC_DIR)/ld
 # C flags
 CFLAGS		+= -g -gdwarf-2   # debuggin symbols in listing
 CFLAGS		+= -O2 -D__thumb2__=1 -MD
-CFLAGS		+= -Wall -Werror -Wextra -Wshadow 
+CFLAGS		+= -Wall -Wextra -Wshadow 
-CFLAGS		+= -fshort-enums -ffunction-sections -fdata-sections -flto
+CFLAGS		+= -fshort-enums -ffunction-sections -fdata-sections
-#CFLAGS		+= -fno-common -ffunction-sections -fdata-sections -fno-stack-protector
+#CFLAGS		+= -fno-common -fno-stack-protector
 CFLAGS		+=  $(ARCH_FLAGS)
 
 ###############################################################################
 # Linker flags
-#LDFLAGS		+= -nostartfiles --static -nostdlib  -specs=nosys.specs -specs=nano.specs
+LDFLAGS		+= -nostartfiles --static -specs=nosys.specs -specs=nano.specs
 LDFLAGS		+= $(ARCH_FLAGS)
-LDFLAGS		+= -specs=nano.specs -flto
 LDFLAGS		+= -L$(LIB_DIR) 
 #-L$(TOOLCHLIB)
 LDFLAGS		+= -T$(LDSCRIPT)
@@ -76,7 +75,7 @@ LDFLAGS		+= -Wl,-Map=$(MAP),--cref -Wl,--gc-sections -Wl,--print-memory-usage
 
 ###############################################################################
 # Used libraries
-#LDLIBS		+=  -lc $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
+LDLIBS		+= -lm -lc $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
 
 DEFS		+= -DSTM32$(FAMILY) -DSTM32$(MCU)
 
@@ -85,7 +84,29 @@ LIST	:= $(OBJDIR)/$(BINARY).list
 BIN		:= $(BINARY).bin
 HEX		:= $(BINARY).hex
 
-all: bin list size
+ifeq ($(shell test -e $(TARGFILE) && echo -n yes),yes)
+	TARGET := $(file < $(TARGFILE))
+else
+	TARGET := RELEASE
+endif
+
+ifeq ($(TARGET), DEBUG)
+	.DEFAULT_GOAL := debug
+endif
+
+# release: add LTO
+release: CFLAGS += -flto
+release: LDFLAGS += -flto
+release: $(TARGFILE) bin list size
+
+#debug: add debug flags
+debug: CFLAGS += -DEBUG -Werror -g3
+debug: TARGET := DEBUG
+debug: $(TARGFILE) bin list size
+
+$(TARGFILE): $(OBJDIR)
+	@echo -e "\t\tTARGET: $(TARGET)"
+	@echo "$(TARGET)" > $(TARGFILE)
 
 elf: $(ELF)
 bin: $(BIN)
@@ -127,8 +148,7 @@ size: $(ELF)
 
 clean:
 	@echo "  CLEAN"
-	$(RM) $(OBJS) $(DEPS) $(ELF) $(HEX) $(LIST) $(MAP)
+	@rm -rf $(OBJDIR) 2>/dev/null || true
-	@rmdir $(OBJDIR) 2>/dev/null || true
 
 
 flash: $(BIN)
@@ -143,4 +163,10 @@ dfuboot: $(BIN)
 	@echo "  LOAD  $(BIN) THROUGH DFU"
 	$(DFUUTIL) -a0 -D $(BIN) -s 0x08000000
 
-.PHONY: clean flash boot
+openocd:
+	openocd -f openocd.cfg
+
+dbg:
+	arm-none-eabi-gdb $(ELF) -ex 'target remote localhost:3333' -ex 'monitor reset halt'
+
+.PHONY: size clean flash boot dfuboot openocd dbg

F3:F303/floatPrintf/main.c

@@ -15,8 +15,10 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
+#include <math.h>
+#include <stm32f3.h>
+#include <string.h>
 
-#include "stm32f3.h"
 #include "hardware.h"
 #include "usart.h"
 
@@ -27,12 +29,17 @@ void sys_tick_handler(void){
 }
 
 // be careful: if pow10 would be bigger you should change str[] size!
-static const float pwr10[] = {1., 10., 100., 1000., 10000.};
+static const float pwr10[] = {1.f, 10.f, 100.f, 1000.f, 10000.f};
-static const float rounds[] = {0.5, 0.05, 0.005, 0.0005, 0.00005};
+static const float rounds[] = {0.5f, 0.05f, 0.005f, 0.0005f, 0.00005f};
 #define P10L  (sizeof(pwr10)/sizeof(uint32_t) - 1)
 static char * float2str(float x, uint8_t prec){
-    if(prec > P10L) prec = P10L;
     static char str[16] = {0}; // -117.5494E-36\0 - 14 symbols max!
+    if(prec > P10L) prec = P10L;
+    if(isnan(x)){ memcpy(str, "NAN", 4); return str;}
+    else{
+        int i = isinf(x);
+        if(i){memcpy(str, "-INF", 5); if(i == 1) return str+1; else return str;}
+    }
     char *s = str + 14; // go to end of buffer
     uint8_t minus = 0;
     if(x < 0){
@@ -89,8 +96,9 @@ static char * float2str(float x, uint8_t prec){
     return s+1;
 }
 
-static const float tests[] = {-1.23456789e-37, -3.14159265e-2, -1234.56789, -1.2345678, 0., 1e-40, 0.1234567, 123.456789, 2.473829e31};
+static const float tests[] = {-1.23456789e-37f, -3.14159265e-2f, -1234.56789f, -1.2345678f, 0.f, 1e-40f, 0.1234567f, 123.456789f, 2.473829e31f, 
-#define TESTN 9
+NAN, INFINITY, -INFINITY};
+#define TESTN 12
 
 int main(void){
     sysreset();
@@ -100,15 +108,14 @@ int main(void){
     usart_setup();
     usart_send("Start\n");
     uint32_t ctr = Tms;
-    float x = 0.519, more = 5.123;
+    float more = 5.123f, ang = 0.f;
     while(1){
         if(Tms - ctr > 499){
             ctr = Tms;
             pin_toggle(GPIOB, 1 << 1 | 1 << 0); // toggle LED @ PB0
             /**/
-            if((x += 0.519) > more){
+            more += 0.1234567f;
-                more += 5.123;
+            ang += 0.5f;
-            }
         }
         if(bufovr){
             bufovr = 0;
@@ -121,6 +128,16 @@ int main(void){
                     usart_send(float2str(tests[i], j));
                     usart_putchar('\n');
                 }
+                usart_send("\nValue of 'more': ");
+                usart_send(float2str(more, 4));
+                usart_send(", sqrt of 'more': ");
+                usart_send(float2str(sqrtf(more), 4));
+                usart_send("\nValue of 'ang': ");
+                usart_send(float2str(ang, 4));
+                usart_send(", tan of 'ang' degr: ");
+                usart_send(float2str(tan(ang/180.f*M_PI), 4));
+                usart_send("\ninf and nan: "); usart_send(float2str(ang/0.f, 4)); usart_putchar(' '); usart_send(float2str(sqrtf(-ang), 4));
+                usart_putchar('\n');
             }else{
                 usart_send("Get by USART1: ");
                 usart_send(txt);

F3:F303/floatPrintf/openocd.cfg

@@ -0,0 +1,119 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+# script for stm32f3x family
+
+#
+# stm32 devices support both JTAG and SWD transports.
+#
+source [find interface/stlink-v2-1.cfg]
+source [find target/swj-dp.tcl]
+source [find mem_helper.tcl]
+
+if { [info exists CHIPNAME] } {
+   set _CHIPNAME $CHIPNAME
+} else {
+   set _CHIPNAME stm32f3x
+}
+
+set _ENDIAN little
+
+# Work-area is a space in RAM used for flash programming
+# By default use 16kB
+if { [info exists WORKAREASIZE] } {
+   set _WORKAREASIZE $WORKAREASIZE
+} else {
+   set _WORKAREASIZE 0x4000
+}
+
+# JTAG speed should be <= F_CPU/6. F_CPU after reset is 8MHz, so use F_JTAG = 1MHz
+#
+# Since we may be running of an RC oscilator, we crank down the speed a
+# bit more to be on the safe side. Perhaps superstition, but if are
+# running off a crystal, we can run closer to the limit. Note
+# that there can be a pretty wide band where things are more or less stable.
+adapter speed 1000
+
+adapter srst delay 100
+if {[using_jtag]} {
+ jtag_ntrst_delay 100
+}
+
+#jtag scan chain
+if { [info exists CPUTAPID] } {
+   set _CPUTAPID $CPUTAPID
+} else {
+   if { [using_jtag] } {
+      # See STM Document RM0316
+      # Section 29.6.3 - corresponds to Cortex-M4 r0p1
+      set _CPUTAPID 0x4ba00477
+   } {
+      set _CPUTAPID 0x2ba01477
+   }
+}
+
+swj_newdap $_CHIPNAME cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_CPUTAPID
+dap create $_CHIPNAME.dap -chain-position $_CHIPNAME.cpu
+
+if {[using_jtag]} {
+   jtag newtap $_CHIPNAME bs -irlen 5
+}
+
+set _TARGETNAME $_CHIPNAME.cpu
+target create $_TARGETNAME cortex_m -endian $_ENDIAN -dap $_CHIPNAME.dap
+
+$_TARGETNAME configure -work-area-phys 0x20000000 -work-area-size $_WORKAREASIZE -work-area-backup 0
+
+set _FLASHNAME $_CHIPNAME.flash
+flash bank $_FLASHNAME stm32f1x 0 0 0 0 $_TARGETNAME
+
+reset_config srst_nogate
+
+if {![using_hla]} {
+   # if srst is not fitted use SYSRESETREQ to
+   # perform a soft reset
+   cortex_m reset_config sysresetreq
+}
+
+proc stm32f3x_default_reset_start {} {
+	# Reset clock is HSI (8 MHz)
+	adapter speed 1000
+}
+
+proc stm32f3x_default_examine_end {} {
+	# Enable debug during low power modes (uses more power)
+	mmw 0xe0042004 0x00000007 0 ;# DBGMCU_CR |= DBG_STANDBY | DBG_STOP | DBG_SLEEP
+
+	# Stop watchdog counters during halt
+	mmw 0xe0042008 0x00001800 0 ;# DBGMCU_APB1_FZ |= DBG_IWDG_STOP | DBG_WWDG_STOP
+}
+
+proc stm32f3x_default_reset_init {} {
+	# Configure PLL to boost clock to HSI x 8 (64 MHz)
+	mww 0x40021004 0x00380400   ;# RCC_CFGR = PLLMUL[3:1] | PPRE1[2]
+	mmw 0x40021000 0x01000000 0 ;# RCC_CR |= PLLON
+	mww 0x40022000 0x00000012   ;# FLASH_ACR = PRFTBE | LATENCY[1]
+	sleep 10                    ;# Wait for PLL to lock
+	mmw 0x40021004 0x00000002 0 ;# RCC_CFGR |= SW[1]
+
+	# Boost JTAG frequency
+	adapter speed 8000
+}
+
+# Default hooks
+$_TARGETNAME configure -event examine-end { stm32f3x_default_examine_end }
+$_TARGETNAME configure -event reset-start { stm32f3x_default_reset_start }
+$_TARGETNAME configure -event reset-init { stm32f3x_default_reset_init }
+
+tpiu create $_CHIPNAME.tpiu -dap $_CHIPNAME.dap -ap-num 0 -baseaddr 0xE0040000
+
+lappend _telnet_autocomplete_skip _proc_pre_enable_$_CHIPNAME.tpiu
+proc _proc_pre_enable_$_CHIPNAME.tpiu {_targetname} {
+	targets $_targetname
+
+	# Set TRACE_IOEN; TRACE_MODE is set to async; when using sync
+	# change this value accordingly to configure trace pins
+	# assignment
+	mmw 0xe0042004 0x00000020 0
+}
+
+$_CHIPNAME.tpiu configure -event pre-enable "_proc_pre_enable_$_CHIPNAME.tpiu $_TARGETNAME"

F3:F303/floatPrintf/usart1.cflags

@@ -0,0 +1 @@
+-std=c17

F3:F303/floatPrintf/usart1.config

@@ -0,0 +1,7 @@
+// Add predefined macros for your project here. For example:
+// #define THE_ANSWER 42
+#define EBUG
+#define STM32F3
+#define STM32F303xb
+#define __thumb2__ 1
+#define __ARM_ARCH_7M__

F3:F303/floatPrintf/usart1.creator

@@ -0,0 +1 @@
+[General]

F3:F303/floatPrintf/usart1.creator.user

@@ -0,0 +1,157 @@
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F3:F303/floatPrintf/usart1.cxxflags

@@ -0,0 +1 @@
+-std=c++17

F3:F303/floatPrintf/usart1.files

@@ -0,0 +1,5 @@
+hardware.c
+hardware.h
+main.c
+usart.c
+usart.h

F3:F303/floatPrintf/usart1.includes

@@ -0,0 +1,6 @@
+.
+../inc
+../inc/Fx
+../inc/cm
+../inc/ld
+../inc/startup