initial commit
This commit is contained in:
+180
@@ -0,0 +1,180 @@
|
||||
#******************************************************************************
|
||||
#
|
||||
# Makefile - Rules for building the libraries, examples and docs.
|
||||
#
|
||||
# Copyright (c) 2020, Ambiq Micro
|
||||
# All rights reserved.
|
||||
#
|
||||
# Redistribution and use in source and binary forms, with or without
|
||||
# modification, are permitted provided that the following conditions are met:
|
||||
#
|
||||
# 1. Redistributions of source code must retain the above copyright notice,
|
||||
# this list of conditions and the following disclaimer.
|
||||
#
|
||||
# 2. Redistributions in binary form must reproduce the above copyright
|
||||
# notice, this list of conditions and the following disclaimer in the
|
||||
# documentation and/or other materials provided with the distribution.
|
||||
#
|
||||
# 3. Neither the name of the copyright holder nor the names of its
|
||||
# contributors may be used to endorse or promote products derived from this
|
||||
# software without specific prior written permission.
|
||||
#
|
||||
# Third party software included in this distribution is subject to the
|
||||
# additional license terms as defined in the /docs/licenses directory.
|
||||
#
|
||||
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||||
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
|
||||
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||||
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||||
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||||
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||||
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||||
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
# POSSIBILITY OF SUCH DAMAGE.
|
||||
#
|
||||
# This is part of revision 2.4.2 of the AmbiqSuite Development Package.
|
||||
#
|
||||
#******************************************************************************
|
||||
TARGET := reset_states
|
||||
COMPILERNAME := gcc
|
||||
PROJECT := reset_states_gcc
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||||
CONFIG := bin
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||||
|
||||
SHELL:=/bin/bash
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||||
#### Setup ####
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||||
|
||||
TOOLCHAIN ?= arm-none-eabi
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||||
PART = apollo2
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||||
CPU = cortex-m4
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||||
FPU = fpv4-sp-d16
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||||
#FABI = softfp
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||||
FABI = hard
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||||
|
||||
LINKER_FILE := ./reset_states.ld
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||||
STARTUP_FILE := ./startup_$(COMPILERNAME).c
|
||||
|
||||
#### Required Executables ####
|
||||
CC = $(TOOLCHAIN)-gcc
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||||
GCC = $(TOOLCHAIN)-gcc
|
||||
CPP = $(TOOLCHAIN)-cpp
|
||||
LD = $(TOOLCHAIN)-ld
|
||||
CP = $(TOOLCHAIN)-objcopy
|
||||
OD = $(TOOLCHAIN)-objdump
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||||
RD = $(TOOLCHAIN)-readelf
|
||||
AR = $(TOOLCHAIN)-ar
|
||||
SIZE = $(TOOLCHAIN)-size
|
||||
RM = $(shell which rm 2>/dev/null)
|
||||
|
||||
EXECUTABLES = CC LD CP OD AR RD SIZE GCC
|
||||
K := $(foreach exec,$(EXECUTABLES),\
|
||||
$(if $(shell which $($(exec)) 2>/dev/null),,\
|
||||
$(info $(exec) not found on PATH ($($(exec))).)$(exec)))
|
||||
$(if $(strip $(value K)),$(info Required Program(s) $(strip $(value K)) not found))
|
||||
|
||||
ifneq ($(strip $(value K)),)
|
||||
all clean:
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||||
$(info Tools $(TOOLCHAIN)-$(COMPILERNAME) not installed.)
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||||
$(RM) -rf bin
|
||||
else
|
||||
|
||||
DEFINES = -DPART_$(PART)
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||||
DEFINES+= -DAM_PART_APOLLO2
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||||
DEFINES+= -DAM_PACKAGE_BGA
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||||
DEFINES+= -Dgcc
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||||
|
||||
INCLUDES = -I../../../../../mcu/apollo2
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||||
INCLUDES+= -I../../../../../utils
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||||
INCLUDES+= -I../../../../../devices
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||||
INCLUDES+= -I../../../bsp
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||||
INCLUDES+= -I../src
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||||
INCLUDES+= -I../../../../..
|
||||
|
||||
VPATH = ../src
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||||
VPATH+=:../../../../../utils
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||||
VPATH+=:../../../../../devices
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||||
|
||||
SRC = reset_states.c
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SRC += am_util_delay.c
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SRC += am_util_faultisr.c
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SRC += am_util_stdio.c
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||||
SRC += am_devices_led.c
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||||
SRC += startup_gcc.c
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||||
|
||||
CSRC = $(filter %.c,$(SRC))
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||||
ASRC = $(filter %.s,$(SRC))
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||||
|
||||
OBJS = $(CSRC:%.c=$(CONFIG)/%.o)
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||||
OBJS+= $(ASRC:%.s=$(CONFIG)/%.o)
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||||
|
||||
DEPS = $(CSRC:%.c=$(CONFIG)/%.d)
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||||
DEPS+= $(ASRC:%.s=$(CONFIG)/%.d)
|
||||
|
||||
LIBS = ../../../../../mcu/apollo2/hal/gcc/bin/libam_hal.a
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||||
LIBS += ../../../bsp/gcc/bin/libam_bsp.a
|
||||
|
||||
CFLAGS = -mthumb -mcpu=$(CPU) -mfpu=$(FPU) -mfloat-abi=$(FABI)
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||||
CFLAGS+= -ffunction-sections -fdata-sections -fomit-frame-pointer
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||||
CFLAGS+= -MMD -MP -std=c99 -Wall -g
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||||
CFLAGS+= -O0
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||||
CFLAGS+= $(DEFINES)
|
||||
CFLAGS+= $(INCLUDES)
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||||
CFLAGS+=
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||||
|
||||
LFLAGS = -mthumb -mcpu=$(CPU) -mfpu=$(FPU) -mfloat-abi=$(FABI)
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||||
LFLAGS+= -nostartfiles -static
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||||
LFLAGS+= -Wl,--gc-sections,--entry,am_reset_isr,-Map,$(CONFIG)/$(TARGET).map
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||||
LFLAGS+= -Wl,--start-group -lm -lc -lgcc $(LIBS) -Wl,--end-group
|
||||
LFLAGS+=
|
||||
|
||||
# Additional user specified CFLAGS
|
||||
CFLAGS+=$(EXTRA_CFLAGS)
|
||||
|
||||
CPFLAGS = -Obinary
|
||||
|
||||
ODFLAGS = -S
|
||||
|
||||
#### Rules ####
|
||||
all: directories $(CONFIG)/$(TARGET).bin
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||||
|
||||
directories: $(CONFIG)
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||||
|
||||
$(CONFIG):
|
||||
@mkdir -p $@
|
||||
|
||||
$(CONFIG)/%.o: %.c $(CONFIG)/%.d
|
||||
@echo " Compiling $(COMPILERNAME) $<" ;\
|
||||
$(CC) -c $(CFLAGS) $< -o $@
|
||||
|
||||
$(CONFIG)/%.o: %.s $(CONFIG)/%.d
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||||
@echo " Assembling $(COMPILERNAME) $<" ;\
|
||||
$(CC) -c $(CFLAGS) $< -o $@
|
||||
|
||||
$(CONFIG)/$(TARGET).axf: $(OBJS) $(LIBS)
|
||||
@echo " Linking $(COMPILERNAME) $@" ;\
|
||||
$(CC) -Wl,-T,$(LINKER_FILE) -o $@ $(OBJS) $(LFLAGS)
|
||||
|
||||
$(CONFIG)/$(TARGET).bin: $(CONFIG)/$(TARGET).axf
|
||||
@echo " Copying $(COMPILERNAME) $@..." ;\
|
||||
$(CP) $(CPFLAGS) $< $@ ;\
|
||||
$(OD) $(ODFLAGS) $< > $(CONFIG)/$(TARGET).lst
|
||||
|
||||
clean:
|
||||
@echo "Cleaning..." ;\
|
||||
$(RM) -f $(OBJS) $(DEPS) \
|
||||
$(CONFIG)/$(TARGET).bin $(CONFIG)/$(TARGET).axf \
|
||||
$(CONFIG)/$(TARGET).lst $(CONFIG)/$(TARGET).map
|
||||
|
||||
$(CONFIG)/%.d: ;
|
||||
|
||||
../../../../../mcu/apollo2/hal/gcc/bin/libam_hal.a:
|
||||
$(MAKE) -C ../../../../../mcu/apollo2/hal
|
||||
|
||||
../../../bsp/gcc/bin/libam_bsp.a:
|
||||
$(MAKE) -C ../../../bsp
|
||||
|
||||
# Automatically include any generated dependencies
|
||||
-include $(DEPS)
|
||||
endif
|
||||
.PHONY: all clean directories
|
||||
+62
@@ -0,0 +1,62 @@
|
||||
/******************************************************************************
|
||||
*
|
||||
* reset_states.ld - Linker script for applications using startup_gnu.c
|
||||
*
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||||
*****************************************************************************/
|
||||
ENTRY(am_reset_isr)
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||||
|
||||
MEMORY
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||||
{
|
||||
FLASH (rx) : ORIGIN = 0x00000000, LENGTH = 1024K
|
||||
SRAM (rwx) : ORIGIN = 0x10000000, LENGTH = 256K
|
||||
}
|
||||
|
||||
SECTIONS
|
||||
{
|
||||
.text :
|
||||
{
|
||||
. = ALIGN(4);
|
||||
KEEP(*(.isr_vector))
|
||||
*(.text)
|
||||
*(.text*)
|
||||
*(.rodata)
|
||||
*(.rodata*)
|
||||
. = ALIGN(4);
|
||||
_etext = .;
|
||||
} > FLASH
|
||||
|
||||
/* User stack section initialized by startup code. */
|
||||
.stack (NOLOAD):
|
||||
{
|
||||
. = ALIGN(8);
|
||||
*(.stack)
|
||||
*(.stack*)
|
||||
. = ALIGN(8);
|
||||
} > SRAM
|
||||
|
||||
.data :
|
||||
{
|
||||
. = ALIGN(4);
|
||||
_sdata = .;
|
||||
*(.data)
|
||||
*(.data*)
|
||||
. = ALIGN(4);
|
||||
_edata = .;
|
||||
} > SRAM AT>FLASH
|
||||
|
||||
/* used by startup to initialize data */
|
||||
_init_data = LOADADDR(.data);
|
||||
|
||||
.bss :
|
||||
{
|
||||
. = ALIGN(4);
|
||||
_sbss = .;
|
||||
*(.bss)
|
||||
*(.bss*)
|
||||
*(COMMON)
|
||||
. = ALIGN(4);
|
||||
_ebss = .;
|
||||
} > SRAM
|
||||
|
||||
.ARM.attributes 0 : { *(.ARM.attributes) }
|
||||
}
|
||||
+318
@@ -0,0 +1,318 @@
|
||||
//*****************************************************************************
|
||||
//
|
||||
//! @file startup_gcc.c
|
||||
//!
|
||||
//! @brief Definitions for interrupt handlers, the vector table, and the stack.
|
||||
//
|
||||
//*****************************************************************************
|
||||
|
||||
//*****************************************************************************
|
||||
//
|
||||
// Copyright (c) 2020, Ambiq Micro
|
||||
// All rights reserved.
|
||||
//
|
||||
// Redistribution and use in source and binary forms, with or without
|
||||
// modification, are permitted provided that the following conditions are met:
|
||||
//
|
||||
// 1. Redistributions of source code must retain the above copyright notice,
|
||||
// this list of conditions and the following disclaimer.
|
||||
//
|
||||
// 2. Redistributions in binary form must reproduce the above copyright
|
||||
// notice, this list of conditions and the following disclaimer in the
|
||||
// documentation and/or other materials provided with the distribution.
|
||||
//
|
||||
// 3. Neither the name of the copyright holder nor the names of its
|
||||
// contributors may be used to endorse or promote products derived from this
|
||||
// software without specific prior written permission.
|
||||
//
|
||||
// Third party software included in this distribution is subject to the
|
||||
// additional license terms as defined in the /docs/licenses directory.
|
||||
//
|
||||
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||||
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
|
||||
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||||
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||||
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||||
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||||
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||||
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
// POSSIBILITY OF SUCH DAMAGE.
|
||||
//
|
||||
// This is part of revision 2.4.2 of the AmbiqSuite Development Package.
|
||||
//
|
||||
//*****************************************************************************
|
||||
|
||||
#include <stdint.h>
|
||||
|
||||
//*****************************************************************************
|
||||
//
|
||||
// Forward declaration of interrupt handlers.
|
||||
//
|
||||
//*****************************************************************************
|
||||
extern void am_reset_isr(void) __attribute ((naked));
|
||||
extern void am_nmi_isr(void) __attribute ((weak));
|
||||
extern void am_fault_isr(void) __attribute ((weak));
|
||||
extern void am_mpufault_isr(void) __attribute ((weak, alias ("am_fault_isr")));
|
||||
extern void am_busfault_isr(void) __attribute ((weak, alias ("am_fault_isr")));
|
||||
extern void am_usagefault_isr(void) __attribute ((weak, alias ("am_fault_isr")));
|
||||
extern void am_svcall_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
extern void am_debugmon_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
extern void am_pendsv_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
extern void am_systick_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
|
||||
extern void am_brownout_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
extern void am_watchdog_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
extern void am_clkgen_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
extern void am_vcomp_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
extern void am_ioslave_ios_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
extern void am_ioslave_acc_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
extern void am_iomaster0_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
extern void am_iomaster1_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
extern void am_iomaster2_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
extern void am_iomaster3_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
extern void am_iomaster4_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
extern void am_iomaster5_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
extern void am_gpio_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
extern void am_ctimer_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
extern void am_uart_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
extern void am_uart1_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
extern void am_adc_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
extern void am_pdm0_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
extern void am_stimer_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
extern void am_stimer_cmpr0_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
extern void am_stimer_cmpr1_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
extern void am_stimer_cmpr2_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
extern void am_stimer_cmpr3_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
extern void am_stimer_cmpr4_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
extern void am_stimer_cmpr5_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
extern void am_stimer_cmpr6_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
extern void am_stimer_cmpr7_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
extern void am_flash_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
extern void am_software0_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
extern void am_software1_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
extern void am_software2_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
extern void am_software3_isr(void) __attribute ((weak, alias ("am_default_isr")));
|
||||
|
||||
extern void am_default_isr(void) __attribute ((weak));
|
||||
|
||||
//*****************************************************************************
|
||||
//
|
||||
// The entry point for the application.
|
||||
//
|
||||
//*****************************************************************************
|
||||
extern int main(void);
|
||||
|
||||
//*****************************************************************************
|
||||
//
|
||||
// Reserve space for the system stack.
|
||||
//
|
||||
//*****************************************************************************
|
||||
__attribute__ ((section(".stack")))
|
||||
static uint32_t g_pui32Stack[1024];
|
||||
|
||||
//*****************************************************************************
|
||||
//
|
||||
// The vector table. Note that the proper constructs must be placed on this to
|
||||
// ensure that it ends up at physical address 0x0000.0000.
|
||||
//
|
||||
// Note: Aliasing and weakly exporting am_mpufault_isr, am_busfault_isr, and
|
||||
// am_usagefault_isr does not work if am_fault_isr is defined externally.
|
||||
// Therefore, we'll explicitly use am_fault_isr in the table for those vectors.
|
||||
//
|
||||
//*****************************************************************************
|
||||
__attribute__ ((section(".isr_vector")))
|
||||
void (* const g_am_pfnVectors[])(void) =
|
||||
{
|
||||
(void (*)(void))((uint32_t)g_pui32Stack + sizeof(g_pui32Stack)),
|
||||
// The initial stack pointer
|
||||
am_reset_isr, // The reset handler
|
||||
am_nmi_isr, // The NMI handler
|
||||
am_fault_isr, // The hard fault handler
|
||||
am_fault_isr, // The MPU fault handler
|
||||
am_fault_isr, // The bus fault handler
|
||||
am_fault_isr, // The usage fault handler
|
||||
0, // Reserved
|
||||
0, // Reserved
|
||||
0, // Reserved
|
||||
0, // Reserved
|
||||
am_svcall_isr, // SVCall handle
|
||||
am_debugmon_isr, // Debug monitor handler
|
||||
0, // Reserved
|
||||
am_pendsv_isr, // The PendSV handler
|
||||
am_systick_isr, // The SysTick handler
|
||||
|
||||
//
|
||||
// Peripheral Interrupts
|
||||
//
|
||||
am_brownout_isr, // 0: Brownout
|
||||
am_watchdog_isr, // 1: Watchdog
|
||||
am_clkgen_isr, // 2: CLKGEN
|
||||
am_vcomp_isr, // 3: Voltage Comparator
|
||||
am_ioslave_ios_isr, // 4: I/O Slave general
|
||||
am_ioslave_acc_isr, // 5: I/O Slave access
|
||||
am_iomaster0_isr, // 6: I/O Master 0
|
||||
am_iomaster1_isr, // 7: I/O Master 1
|
||||
am_iomaster2_isr, // 8: I/O Master 2
|
||||
am_iomaster3_isr, // 9: I/O Master 3
|
||||
am_iomaster4_isr, // 10: I/O Master 4
|
||||
am_iomaster5_isr, // 11: I/O Master 5
|
||||
am_gpio_isr, // 12: GPIO
|
||||
am_ctimer_isr, // 13: CTIMER
|
||||
am_uart_isr, // 14: UART
|
||||
am_uart1_isr, // 15: UART
|
||||
am_adc_isr, // 16: ADC
|
||||
am_pdm0_isr, // 17: PDM
|
||||
am_stimer_isr, // 18: SYSTEM TIMER
|
||||
am_stimer_cmpr0_isr, // 19: SYSTEM TIMER COMPARE0
|
||||
am_stimer_cmpr1_isr, // 20: SYSTEM TIMER COMPARE1
|
||||
am_stimer_cmpr2_isr, // 21: SYSTEM TIMER COMPARE2
|
||||
am_stimer_cmpr3_isr, // 22: SYSTEM TIMER COMPARE3
|
||||
am_stimer_cmpr4_isr, // 23: SYSTEM TIMER COMPARE4
|
||||
am_stimer_cmpr5_isr, // 24: SYSTEM TIMER COMPARE5
|
||||
am_stimer_cmpr6_isr, // 25: SYSTEM TIMER COMPARE6
|
||||
am_stimer_cmpr7_isr, // 26: SYSTEM TIMER COMPARE7
|
||||
am_flash_isr, // 27: FLASH
|
||||
am_software0_isr, // 28: SOFTWARE0
|
||||
am_software1_isr, // 29: SOFTWARE1
|
||||
am_software2_isr, // 30: SOFTWARE2
|
||||
am_software3_isr // 31: SOFTWARE3
|
||||
};
|
||||
|
||||
//*****************************************************************************
|
||||
//
|
||||
// The following are constructs created by the linker, indicating where the
|
||||
// the "data" and "bss" segments reside in memory. The initializers for the
|
||||
// "data" segment resides immediately following the "text" segment.
|
||||
//
|
||||
//*****************************************************************************
|
||||
extern uint32_t _etext;
|
||||
extern uint32_t _sdata;
|
||||
extern uint32_t _edata;
|
||||
extern uint32_t _sbss;
|
||||
extern uint32_t _ebss;
|
||||
|
||||
//*****************************************************************************
|
||||
//
|
||||
// This is the code that gets called when the processor first starts execution
|
||||
// following a reset event. Only the absolutely necessary set is performed,
|
||||
// after which the application supplied entry() routine is called.
|
||||
//
|
||||
//*****************************************************************************
|
||||
#if defined(__GNUC_STDC_INLINE__)
|
||||
void
|
||||
am_reset_isr(void)
|
||||
{
|
||||
//
|
||||
// Set the vector table pointer.
|
||||
//
|
||||
__asm(" ldr r0, =0xE000ED08\n"
|
||||
" ldr r1, =g_am_pfnVectors\n"
|
||||
" str r1, [r0]");
|
||||
|
||||
//
|
||||
// Set the stack pointer.
|
||||
//
|
||||
__asm(" ldr sp, [r1]");
|
||||
#ifndef NOFPU
|
||||
//
|
||||
// Enable the FPU.
|
||||
//
|
||||
__asm("ldr r0, =0xE000ED88\n"
|
||||
"ldr r1,[r0]\n"
|
||||
"orr r1,#(0xF << 20)\n"
|
||||
"str r1,[r0]\n"
|
||||
"dsb\n"
|
||||
"isb\n");
|
||||
#endif
|
||||
//
|
||||
// Copy the data segment initializers from flash to SRAM.
|
||||
//
|
||||
__asm(" ldr r0, =_init_data\n"
|
||||
" ldr r1, =_sdata\n"
|
||||
" ldr r2, =_edata\n"
|
||||
"copy_loop:\n"
|
||||
" ldr r3, [r0], #4\n"
|
||||
" str r3, [r1], #4\n"
|
||||
" cmp r1, r2\n"
|
||||
" blt copy_loop\n");
|
||||
//
|
||||
// Zero fill the bss segment.
|
||||
//
|
||||
__asm(" ldr r0, =_sbss\n"
|
||||
" ldr r1, =_ebss\n"
|
||||
" mov r2, #0\n"
|
||||
"zero_loop:\n"
|
||||
" cmp r0, r1\n"
|
||||
" it lt\n"
|
||||
" strlt r2, [r0], #4\n"
|
||||
" blt zero_loop");
|
||||
|
||||
//
|
||||
// Call the application's entry point.
|
||||
//
|
||||
main();
|
||||
|
||||
//
|
||||
// If main returns then execute a break point instruction
|
||||
//
|
||||
__asm(" bkpt ");
|
||||
}
|
||||
#else
|
||||
#error GNU STDC inline not supported.
|
||||
#endif
|
||||
|
||||
//*****************************************************************************
|
||||
//
|
||||
// This is the code that gets called when the processor receives a NMI. This
|
||||
// simply enters an infinite loop, preserving the system state for examination
|
||||
// by a debugger.
|
||||
//
|
||||
//*****************************************************************************
|
||||
void
|
||||
am_nmi_isr(void)
|
||||
{
|
||||
//
|
||||
// Go into an infinite loop.
|
||||
//
|
||||
while(1)
|
||||
{
|
||||
}
|
||||
}
|
||||
|
||||
//*****************************************************************************
|
||||
//
|
||||
// This is the code that gets called when the processor receives a fault
|
||||
// interrupt. This simply enters an infinite loop, preserving the system state
|
||||
// for examination by a debugger.
|
||||
//
|
||||
//*****************************************************************************
|
||||
void
|
||||
am_fault_isr(void)
|
||||
{
|
||||
//
|
||||
// Go into an infinite loop.
|
||||
//
|
||||
while(1)
|
||||
{
|
||||
}
|
||||
}
|
||||
|
||||
//*****************************************************************************
|
||||
//
|
||||
// This is the code that gets called when the processor receives an unexpected
|
||||
// interrupt. This simply enters an infinite loop, preserving the system state
|
||||
// for examination by a debugger.
|
||||
//
|
||||
//*****************************************************************************
|
||||
void
|
||||
am_default_isr(void)
|
||||
{
|
||||
//
|
||||
// Go into an infinite loop.
|
||||
//
|
||||
while(1)
|
||||
{
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user