Add dcc debug write and fix mcu part number

.clang-format

@@ -0,0 +1,66 @@
+# Generated from CLion C/C++ Code Style settings
+BasedOnStyle: LLVM
+AccessModifierOffset: -2
+AlignAfterOpenBracket: Align
+AlignConsecutiveAssignments: None
+AlignOperands: Align
+AllowAllArgumentsOnNextLine: false
+AllowAllConstructorInitializersOnNextLine: false
+AllowAllParametersOfDeclarationOnNextLine: false
+AllowShortBlocksOnASingleLine: Always
+AllowShortCaseLabelsOnASingleLine: false
+AllowShortFunctionsOnASingleLine: All
+AllowShortIfStatementsOnASingleLine: Always
+AllowShortLambdasOnASingleLine: All
+AllowShortLoopsOnASingleLine: true
+AlwaysBreakAfterReturnType: None
+AlwaysBreakTemplateDeclarations: Yes
+BreakBeforeBraces: Custom
+BraceWrapping:
+  AfterCaseLabel: false
+  AfterClass: false
+  AfterControlStatement: Never
+  AfterEnum: false
+  AfterFunction: false
+  AfterNamespace: false
+  AfterUnion: false
+  BeforeCatch: false
+  BeforeElse: false
+  IndentBraces: false
+  SplitEmptyFunction: false
+  SplitEmptyRecord: true
+BreakBeforeBinaryOperators: None
+BreakBeforeTernaryOperators: true
+BreakConstructorInitializers: BeforeColon
+BreakInheritanceList: BeforeColon
+ColumnLimit: 0
+CompactNamespaces: false
+ContinuationIndentWidth: 8
+IndentCaseLabels: true
+IndentPPDirectives: None
+IndentWidth: 2
+KeepEmptyLinesAtTheStartOfBlocks: true
+MaxEmptyLinesToKeep: 2
+NamespaceIndentation: All
+ObjCSpaceAfterProperty: false
+ObjCSpaceBeforeProtocolList: true
+PointerAlignment: Right
+ReflowComments: false
+SpaceAfterCStyleCast: true
+SpaceAfterLogicalNot: false
+SpaceAfterTemplateKeyword: false
+SpaceBeforeAssignmentOperators: true
+SpaceBeforeCpp11BracedList: false
+SpaceBeforeCtorInitializerColon: true
+SpaceBeforeInheritanceColon: true
+SpaceBeforeParens: ControlStatements
+SpaceBeforeRangeBasedForLoopColon: true
+SpaceInEmptyParentheses: false
+SpacesBeforeTrailingComments: 0
+SpacesInAngles: false
+SpacesInCStyleCastParentheses: false
+SpacesInContainerLiterals: false
+SpacesInParentheses: false
+SpacesInSquareBrackets: false
+TabWidth: 4
+UseTab: ForContinuationAndIndentation

.editorconfig

@@ -0,0 +1,8 @@
+# top-most EditorConfig file
+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+indent_style = tab
+indent_size = 4

.gitignore

@@ -1,5 +1,8 @@
 bin/
 *.elf
 *.bin
+*.map
+*.lss
+*.list
 generated.*.ld
 .idea

Makefile

@@ -5,12 +5,17 @@ BUILD_DIR = bin
 
 #SHARED_DIR = ../my-common-code
 CFILES = main.c
-#CFILES += api.c
 #AFILES += api-asm.S
 
 # TODO - you will need to edit these two lines!
-DEVICE=stm32f103rcbt6
-OOCD_FILE = board/stm32f4discovery.cfg
+DEVICE=STM32F103C8T6
+OOCD_FILE=openocd.cfg
+
+# Send debug messages via OpenOCD DCC support
+CFILES += dcc_stdio.c
+VPATH += libdcc
+INCLUDES += $(patsubst %,-I%, . libdcc)
+
 
 # You shouldn't have to edit anything below here.
 #VPATH += $(SHARED_DIR)

libdcc/README

@@ -0,0 +1,18 @@
+This code is an example of using the openocd debug message system.
+
+Before the message output is seen in the debug window, the functionality
+will need enabling:
+
+From the gdb prompt:
+monitor target_request debugmsgs enable
+monitor trace point 1
+
+From the Telnet prompt:
+target_request debugmsgs enable
+trace point 1
+
+To see how many times the trace point was hit:
+(monitor) trace point 1
+
+Spen
+spen@spen-soft.co.uk

libdcc/dcc_stdio.c

@@ -0,0 +1,155 @@
+/***************************************************************************
+ *   Copyright (C) 2008 by Dominic Rath                                    *
+ *   Dominic.Rath@gmx.de                                                   *
+ *   Copyright (C) 2008 by Spencer Oliver                                  *
+ *   spen@spen-soft.co.uk                                                  *
+ *   Copyright (C) 2008 by Frederik Kriewtz                                *
+ *   frederik@kriewitz.eu                                                  *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   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 "dcc_stdio.h"
+
+#define TARGET_REQ_TRACEMSG					0x00
+#define TARGET_REQ_DEBUGMSG_ASCII			0x01
+#define TARGET_REQ_DEBUGMSG_HEXMSG(size)	(0x01 | ((size & 0xff) << 8))
+#define TARGET_REQ_DEBUGCHAR				0x02
+
+#if defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7EM__) || defined(__ARM_ARCH_6SM__)
+
+/* we use the System Control Block DCRDR reg to simulate a arm7_9 dcc channel
+ * DCRDR[7:0] is used by target for status
+ * DCRDR[15:8] is used by target for write buffer
+ * DCRDR[23:16] is used for by host for status
+ * DCRDR[31:24] is used for by host for write buffer */
+
+#define NVIC_DBG_DATA_R		(*((volatile unsigned short *)0xE000EDF8))
+
+#define	BUSY	1
+
+void dbg_write(unsigned long dcc_data)
+{
+	int len = 4;
+
+	while (len--)
+	{
+		/* wait for data ready */
+		while (NVIC_DBG_DATA_R & BUSY);
+
+		/* write our data and set write flag - tell host there is data*/
+		NVIC_DBG_DATA_R = (unsigned short)(((dcc_data & 0xff) << 8) | BUSY);
+		dcc_data >>= 8;
+	}
+}
+
+#elif defined(__ARM_ARCH_4T__) || defined(__ARM_ARCH_5TE__) || defined(__ARM_ARCH_5T__)
+
+void dbg_write(unsigned long dcc_data)
+{
+	unsigned long dcc_status;
+
+	do {
+		asm volatile("mrc p14, 0, %0, c0, c0" : "=r" (dcc_status));
+	} while (dcc_status & 0x2);
+
+	asm volatile("mcr p14, 0, %0, c1, c0" : : "r" (dcc_data));
+}
+
+#else
+ #error unsupported target
+#endif
+
+void dbg_trace_point(unsigned long number)
+{
+	dbg_write(TARGET_REQ_TRACEMSG | (number << 8));
+}
+
+void dbg_write_u32(const unsigned long *val, long len)
+{
+	dbg_write(TARGET_REQ_DEBUGMSG_HEXMSG(4) | ((len & 0xffff) << 16));
+
+	while (len > 0)
+	{
+		dbg_write(*val);
+
+		val++;
+		len--;
+	}
+}
+
+void dbg_write_u16(const unsigned short *val, long len)
+{
+	unsigned long dcc_data;
+
+	dbg_write(TARGET_REQ_DEBUGMSG_HEXMSG(2) | ((len & 0xffff) << 16));
+
+	while (len > 0)
+	{
+		dcc_data = val[0]
+			| ((len > 1) ? val[1] << 16: 0x0000);
+
+		dbg_write(dcc_data);
+
+		val += 2;
+		len -= 2;
+	}
+}
+
+void dbg_write_u8(const unsigned char *val, long len)
+{
+	unsigned long dcc_data;
+
+	dbg_write(TARGET_REQ_DEBUGMSG_HEXMSG(1) | ((len & 0xffff) << 16));
+
+	while (len > 0)
+	{
+		dcc_data = val[0]
+			| ((len > 1) ? val[1] << 8 : 0x00)
+			| ((len > 2) ? val[2] << 16 : 0x00)
+			| ((len > 3) ? val[3] << 24 : 0x00);
+
+		dbg_write(dcc_data);
+
+		val += 4;
+		len -= 4;
+	}
+}
+
+void dbg_write_str(const char *msg)
+{
+	long len;
+	unsigned long dcc_data;
+
+	for (len = 0; msg[len] && (len < 65536); len++);
+
+	dbg_write(TARGET_REQ_DEBUGMSG_ASCII | ((len & 0xffff) << 16));
+
+	while (len > 0)
+	{
+		dcc_data = msg[0]
+			| ((len > 1) ? msg[1] << 8 : 0x00)
+			| ((len > 2) ? msg[2] << 16 : 0x00)
+			| ((len > 3) ? msg[3] << 24 : 0x00);
+		dbg_write(dcc_data);
+
+		msg += 4;
+		len -= 4;
+	}
+}
+
+void dbg_write_char(char msg)
+{
+	dbg_write(TARGET_REQ_DEBUGCHAR | ((msg & 0xff) << 16));
+}

libdcc/dcc_stdio.h

@@ -0,0 +1,35 @@
+/***************************************************************************
+ *   Copyright (C) 2008 by Dominic Rath                                    *
+ *   Dominic.Rath@gmx.de                                                   *
+ *   Copyright (C) 2008 by Spencer Oliver                                  *
+ *   spen@spen-soft.co.uk                                                  *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
+ ***************************************************************************/
+
+#ifndef DCC_STDIO_H
+#define DCC_STDIO_H
+
+void dbg_write(unsigned long dcc_data);
+
+void dbg_trace_point(unsigned long number);
+
+void dbg_write_u32(const unsigned long *val, long len);
+void dbg_write_u16(const unsigned short *val, long len);
+void dbg_write_u8(const unsigned char *val, long len);
+
+void dbg_write_str(const char *msg);
+void dbg_write_char(char msg);
+
+#endif	/* DCC_STDIO_H */

libdcc/example.c

@@ -0,0 +1,56 @@
+/***************************************************************************
+ *   Copyright (C) 2008 by Spencer Oliver                                  *
+ *   spen@spen-soft.co.uk                                                  *
+ *   Copyright (C) 2008 by Frederik Kriewtz                                *
+ *   frederik@kriewitz.eu                                                  *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   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 "dcc_stdio.h"
+
+/* enable openocd debugmsg at the gdb prompt:
+ * monitor target_request debugmsgs enable
+ *
+ * create a trace point:
+ * monitor trace point 1
+ *
+ * to show how often the trace point was hit:
+ * monitor trace point
+*/
+
+int main(void)
+{
+	dbg_write_str("hello world");
+
+	dbg_write_char('t');
+	dbg_write_char('e');
+	dbg_write_char('s');
+	dbg_write_char('t');
+	dbg_write_char('\n');
+
+	unsigned long test_u32 = 0x01234567;
+	dbg_write_u32(&test_u32, 1);
+
+	static const unsigned short test_u16[] = {0x0123, 0x4567, 0x89AB, 0xCDEF, 0x0123, 0x4567, 0x89AB, 0xCDEF};
+	dbg_write_u16(test_u16, 8);
+
+	static const unsigned char test_u8[] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0XDD, 0xEE, 0xFF};
+	dbg_write_u8(test_u8, 16);
+
+	while(1)
+	{
+		dbg_trace_point(0);
+	}
+}

libopencm3

@@ -1 +1 @@
-Subproject commit 44928416eacb4c8d7774b1385c7f38fb226d080b
+Subproject commit 3b89fc5999874c49f6f5be65bbd5e75f7d77469c

main.c

@@ -22,6 +22,8 @@
 #include <libopencm3/stm32/gpio.h>
 #include <libopencm3/stm32/timer.h>
 
+#include <dcc_stdio.h>
+
 static void delay(int count)
 {
 	for (int i=0; i < count; i++) {
@@ -138,18 +140,25 @@ static void dht_start_signal(void)
 
 volatile int bla=0;
 
+void hard_fault_handler(void) {
+  __asm("bkpt 1");
+}
+
 int main(void)
 {
 	rcc_clock_setup_pll(&rcc_hse_configs[RCC_CLOCK_HSE8_72MHZ]);
 	gpio_setup();
-	tim_setup();
+	//tim_setup();
+
+	dbg_write_str("hello\n");
 
 	/* Blink the LED (PA5) on the board. */
 	while (1) {
 		/* Using API function gpio_toggle(): */
 		gpio_toggle(GPIOB, GPIO1);	/* LED on/off */
 		delay(4000000);
-		dht_start_signal();
+		//dht_start_signal();
+		dbg_write_str("hello2\n");
 	}
 
 	return 0;

openocd.cfg

@@ -1,7 +1,6 @@
-# This is an ST NUCLEO F103RB board with a single STM32F103RBT6 chip.
-# http://www.st.com/web/catalog/tools/FM116/SC959/SS1532/LN1847/PF259875
+# FT2232H Board V3 connected to Maple Mini
 
-interface ftdi
+adapter driver ftdi
 transport select swd
 ftdi_vid_pid 0x0403 0x6010
 
@@ -22,3 +21,6 @@ ftdi_layout_signal nSRST -ndata 0x0020 -noe 0x0040
 source [find target/stm32f1x.cfg]
 
 reset_config srst_only
+
+#poll on
+#target_request debugmsgs enable

rules.mk

@@ -86,7 +86,7 @@ TGT_LDFLAGS += $(ARCH_FLAGS)
 TGT_LDFLAGS += -specs=nano.specs
 TGT_LDFLAGS += -Wl,--gc-sections
 # OPTIONAL
-#TGT_LDFLAGS += -Wl,-Map=$(PROJECT).map
+TGT_LDFLAGS += -Wl,-Map=$(PROJECT).map
 ifeq ($(V),99)
 TGT_LDFLAGS += -Wl,--print-gc-sections
 endif
@@ -174,4 +174,3 @@ clean:
 
 .PHONY: all clean flash
 -include $(OBJS:.o=.d)
-