add basic-serialflash-project
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# ----------------------------------------------------------------------------
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# ATMEL Microcontroller Software Support
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# ----------------------------------------------------------------------------
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# Copyright (c) 2008, Atmel Corporation
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#
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
|
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# modification, are permitted provided that the following conditions are met:
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#
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# - Redistributions of source code must retain the above copyright notice,
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# this list of conditions and the disclaimer below.
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#
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# Atmel's name may not be used to endorse or promote products derived from
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# this software without specific prior written permission.
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#
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# DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
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# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
|
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# DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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# OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
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# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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# ----------------------------------------------------------------------------
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# Makefile for compiling basic-serialflash-project
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#-------------------------------------------------------------------------------
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# User-modifiable options
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#-------------------------------------------------------------------------------
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# Chip & board used for compilation
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# (can be overriden by adding CHIP=chip and BOARD=board to the command-line)
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CHIP = at91sam7s128
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BOARD = simtrace
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# Trace level used for compilation
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# (can be overriden by adding TRACE_LEVEL=#number to the command-line)
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# TRACE_LEVEL_DEBUG 5
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# TRACE_LEVEL_INFO 4
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# TRACE_LEVEL_WARNING 3
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# TRACE_LEVEL_ERROR 2
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# TRACE_LEVEL_FATAL 1
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# TRACE_LEVEL_NO_TRACE 0
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TRACE_LEVEL = 4
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# Optimization level, put in comment for debugging
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OPTIMIZATION = -Os
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# AT91 library directory
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AT91LIB = ../at91lib
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# Output file basename
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OUTPUT = basic-serialflash-project-$(BOARD)-$(CHIP)
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# Compile for all memories available on the board (this sets $(MEMORIES))
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include $(AT91LIB)/boards/$(BOARD)/board.mak
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# Output directories
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BIN = bin
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OBJ = obj
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#-------------------------------------------------------------------------------
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# Tools
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#-------------------------------------------------------------------------------
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# Tool suffix when cross-compiling
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CROSS_COMPILE_COMPILE = arm-elf-
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# Compilation tools
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CC = $(CROSS_COMPILE_COMPILE)gcc
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SIZE = $(CROSS_COMPILE_COMPILE)size
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STRIP = $(CROSS_COMPILE_COMPILE)strip
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OBJCOPY = $(CROSS_COMPILE_COMPILE)objcopy
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# Flags
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INCLUDES = -I$(AT91LIB)/boards/$(BOARD) -I$(AT91LIB)/peripherals
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INCLUDES += -I$(AT91LIB)/memories -I$(AT91LIB)
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CFLAGS = -Wall -mlong-calls -ffunction-sections
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CFLAGS += -g $(OPTIMIZATION) $(INCLUDES) -D$(CHIP) -DTRACE_LEVEL=$(TRACE_LEVEL)
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ASFLAGS = -g $(OPTIMIZATION) $(INCLUDES) -D$(CHIP) -D__ASSEMBLY__
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LDFLAGS = -g $(OPTIMIZATION) -nostartfiles -Wl,--gc-sections
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#-------------------------------------------------------------------------------
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# Files
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#-------------------------------------------------------------------------------
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# Directories where source files can be found
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PERIPH = $(AT91LIB)/peripherals
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MEM = $(AT91LIB)/memories
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BOARDS = $(AT91LIB)/boards
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UTILITY = $(AT91LIB)/utility
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VPATH += $(MEM)/spi-flash
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VPATH += $(UTILITY)
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VPATH += $(PERIPH)/dbgu $(PERIPH)/pio $(PERIPH)/aic $(PERIPH)/pmc
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VPATH += $(PERIPH)/cp15
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VPATH += $(BOARDS)/$(BOARD) $(BOARDS)/$(BOARD)/$(CHIP)
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# Objects built from C source files
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C_OBJECTS = main.o
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C_OBJECTS += spid.o at26.o
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C_OBJECTS += math.o string.o stdio.o
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C_OBJECTS += dbgu.o pio.o aic.o pmc.o cp15.o
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C_OBJECTS += board_memories.o board_lowlevel.o
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# Objects built from Assembly source files
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ASM_OBJECTS = board_cstartup.o
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ASM_OBJECTS += cp15_asm.o
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# Append OBJ and BIN directories to output filename
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OUTPUT := $(BIN)/$(OUTPUT)
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#-------------------------------------------------------------------------------
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# Rules
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#-------------------------------------------------------------------------------
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all: $(BIN) $(OBJ) $(MEMORIES)
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$(BIN) $(OBJ):
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mkdir $@
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define RULES
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C_OBJECTS_$(1) = $(addprefix $(OBJ)/$(1)_, $(C_OBJECTS))
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ASM_OBJECTS_$(1) = $(addprefix $(OBJ)/$(1)_, $(ASM_OBJECTS))
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$(1): $$(ASM_OBJECTS_$(1)) $$(C_OBJECTS_$(1))
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$(CC) $(LDFLAGS) -T"$(AT91LIB)/boards/$(BOARD)/$(CHIP)/$$@.lds" -o $(OUTPUT)-$$@.elf $$^
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$(OBJCOPY) -O binary $(OUTPUT)-$$@.elf $(OUTPUT)-$$@.bin
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$(SIZE) $$^ $(OUTPUT)-$$@.elf
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$$(C_OBJECTS_$(1)): $(OBJ)/$(1)_%.o: %.c Makefile $(OBJ) $(BIN)
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$(CC) $(CFLAGS) -D$(1) -c -o $$@ $$<
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$$(ASM_OBJECTS_$(1)): $(OBJ)/$(1)_%.o: %.S Makefile $(OBJ) $(BIN)
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$(CC) $(ASFLAGS) -D$(1) -c -o $$@ $$<
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debug_$(1): $(1)
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perl ../resources/gdb/debug.pl $(OUTPUT)-$(1).elf
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endef
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$(foreach MEMORY, $(MEMORIES), $(eval $(call RULES,$(MEMORY))))
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clean:
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-rm -f $(OBJ)/*.o $(BIN)/*.bin $(BIN)/*.elf
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@ -0,0 +1,619 @@
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/* ----------------------------------------------------------------------------
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* ATMEL Microcontroller Software Support
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* ----------------------------------------------------------------------------
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* Copyright (c) 2008, Atmel Corporation
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
|
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* modification, are permitted provided that the following conditions are met:
|
||||
*
|
||||
* - Redistributions of source code must retain the above copyright notice,
|
||||
* this list of conditions and the disclaimer below.
|
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*
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* Atmel's name may not be used to endorse or promote products derived from
|
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* this software without specific prior written permission.
|
||||
*
|
||||
* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
||||
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
|
||||
* DISCLAIMED. IN NO EVENT SHALL ATMEL 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,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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* ----------------------------------------------------------------------------
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*/
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//------------------------------------------------------------------------------
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/// \dir "Basic-serialflash-project"
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///
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/// !!!Purpose
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///
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/// The Basic Serialflash project will help new users get familiar with SPI interface
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/// on Atmel's AT91 family of microcontrollers. This project gives you an AT26
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/// serial firmware dataflash programming code so that can help develop your own
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/// SPI devices applications with maximum efficiency.
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///
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/// You can find following information depends on your needs:
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/// - A Spi low level driver performs SPI device Initializes, data transfer and
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/// receive. It can be used by upper SPI driver such as AT26 %dataflash.
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/// - A Dataflash driver is based on top of the corresponding Spi driver.
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/// It allow user to do operations with %dataflash in a unified way.
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///
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/// !See also
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/// - "spi-flash": Dataflash interface driver.
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///
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/// !!!Requirements
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///
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/// This package can be used with all Atmel evaluation kits that have SPI
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/// interface and on-board or external Dataflash connected. The package runs at
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/// SRAM or SDRAM, so SDRAM device is needed if you want to run this package in SDRAM.
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///
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///
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/// !!!Description
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///
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/// The demonstration program tests the dataflash present on the evaluation kit by
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/// erasing and writing each one of its pages.
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///
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/// !!!Usage
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///
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/// -# Build the program and download it inside the evaluation board. Please
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/// refer to the <a href="http://www.atmel.com/dyn/resources/prod_documents/doc6224.pdf">SAM-BA User Guide</a>,
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/// the <a href="http://www.atmel.com/dyn/resources/prod_documents/doc6310.pdf">GNU-Based Software Development</a>
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/// application note or to the <a href="ftp://ftp.iar.se/WWWfiles/arm/Guides/EWARM_UserGuide.ENU.pdf">IAR EWARM User Guide</a>,
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/// depending on your chosen solution.
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/// -# On the computer, open and configure a terminal application
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/// (e.g. HyperTerminal on Microsoft Windows) with these settings:
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/// - 115200 bauds
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/// - 8 bits of data
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/// - No parity
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/// - 1 stop bit
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/// - No flow control
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/// -# Start the application.
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/// -# Upon startup, the application will output the following lines on the DBGU:
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/// \code
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/// -- Basic Serial Firmware Dataflash Project xxx --
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/// -- AT91xxxxxx-xx
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/// -- Compiled: xxx xx xxxx xx:xx:xx --
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/// -I- SPI and At26 initialized
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/// \endcode
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/// -# The program will connect to the serial firmware dataflash through the SPI
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/// and start sending commands to it. It will perform the following:
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/// - Read the JEDEC identifier of the device to autodetect it
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/// The next line should indicate if the serial dataflash has been
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/// correctly identified. For example, this is what appears when an
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/// AT26DF321 chip is recognized:
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/// \code
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/// -I- AT26DF321 Serial Flash detected
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/// \endcode
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/// - Erase the chip
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/// - Check that each page is blank
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/// - Write a "Walking one" pattern on each page:
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/// \code
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/// Byte 0 = 00000001
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/// Byte 1 = 00000010
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/// Byte 2 = 00000100
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/// ........
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/// \endcode
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/// - Verify that the pattern has been correctly applied on each page
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//------------------------------------------------------------------------------
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//------------------------------------------------------------------------------
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/// \unit
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///
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/// !Purpose
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///
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/// This file contains all the specific code for the basic-serialflash-project.
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/// It tests the serial firmware dataflash present on the evaluation kit by
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/// erasing and writing each one of its pages.
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///
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/// !Contents
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/// The code can be roughly broken down as follows:
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/// - AT26 Dataflash write data function.
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/// - AT26 Dataflash read data function.
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/// - AT26 Dataflash erase function.
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/// - Other AT26 functions (such as AT26_GetStatus())
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/// - The main() function, which implements the program behavior.
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/// - Initializes an AT26 instance and configures SPI chip select pin.
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/// - Config SPI Interrupt Service Routine.
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/// - Identifier the AT26 device connected to the evaluation kit.
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/// - Test the dataflash by erasing and writing each one of its pages.
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///
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/// !See also
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/// - "spi-flash": SPI Dataflash interface driver.
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///
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/// Please refer to the list of functions in the #Overview# tab of this unit
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/// for more detailed information.
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//------------------------------------------------------------------------------
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//------------------------------------------------------------------------------
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// Headers
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//------------------------------------------------------------------------------
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#include <board.h>
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#include <dbgu/dbgu.h>
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#include <pio/pio.h>
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#include <aic/aic.h>
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#include <utility/assert.h>
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#include <utility/trace.h>
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#include <utility/math.h>
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#include <memories/spi-flash/at26.h>
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#include <string.h>
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//------------------------------------------------------------------------------
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// Internal definitions
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//------------------------------------------------------------------------------
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/// Maximum device page size in bytes.
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#define MAXPAGESIZE 256
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#if defined(BOARD_AT45_A_SPI_BASE)
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/// Address of the SPI peripheral connected to the AT26.
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#define SPI_BASE BOARD_AT45_A_SPI_BASE
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/// Peripheral identifier of the SPI connected to the AT26.
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#define SPI_ID BOARD_AT45_A_SPI_ID
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/// Chip select value used to select the AT26 chip.
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#define SPI_CS BOARD_AT45_A_NPCS
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/// SPI peripheral pins to configure to access the serial flash.
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#define SPI_PINS BOARD_AT45_A_SPI_PINS, BOARD_AT45_A_NPCS_PIN
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#elif defined(AT91C_BASE_SPI0)
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/// Address of the SPI peripheral connected to the AT26.
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#define SPI_BASE AT91C_BASE_SPI0
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/// Peripheral identifier of the SPI connected to the AT26.
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#define SPI_ID AT91C_ID_SPI0
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/// Chip select value used to select the AT26 chip.
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#define SPI_CS 0
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/// SPI peripheral pins to configure to access the serial flash.
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#define SPI_PINS PINS_SPI0, PIN_SPI0_NPCS0
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#else
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/// Address of the SPI peripheral connected to the AT26.
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#define SPI_BASE AT91C_BASE_SPI
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/// Peripheral identifier of the SPI connected to the AT26.
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#define SPI_ID AT91C_ID_SPI
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/// Chip select value used to select the AT26 chip.
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#define SPI_CS 0
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/// SPI peripheral pins to configure to access the serial flash.
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#define SPI_PINS PINS_SPI, PIN_SPI_NPCS0
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#endif //#if defined(AT91C_BASE_SPI0)
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//------------------------------------------------------------------------------
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// Internal variables
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//------------------------------------------------------------------------------
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/// SPI driver instance.
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static Spid spid;
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/// Serial flash driver instance.
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static At26 at26;
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#define PIN_SPI_nWP0 {1 << 15, AT91C_BASE_PIOA, AT91C_ID_PIOA, PIO_OUTPUT_1, PIO_DEFAULT}
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/// Pins to configure for the application.
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static Pin pins[] = {SPI_PINS, PIN_SPI_nWP0};
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//------------------------------------------------------------------------------
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// Internal functions
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//------------------------------------------------------------------------------
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//------------------------------------------------------------------------------
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/// Interrupt service routine for the SPI peripheral. Forwards the interrupt
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/// to the SPI driver.
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//------------------------------------------------------------------------------
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static void ISR_Spi(void)
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{
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SPID_Handler(&spid);
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}
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//------------------------------------------------------------------------------
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/// Reads and returns the status register of the serial flash.
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/// \param pAt26 Pointer to an AT26 driver instance.
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//------------------------------------------------------------------------------
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static unsigned char AT26_ReadStatus(At26 *pAt26)
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{
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unsigned char error, status;
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SANITY_CHECK(pAt26);
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// Issue a status read command
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error = AT26_SendCommand(pAt26, AT26_READ_STATUS, 1, &status, 1, 0, 0, 0);
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ASSERT(!error, "-F- AT26_GetStatus: Failed to issue command.\n\r");
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// Wait for transfer to finish
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while (AT26_IsBusy(pAt26));
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return status;
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}
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//------------------------------------------------------------------------------
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/// Writes the given value in the status register of the serial flash device.
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/// \param pAt26 Pointer to an AT26 driver instance.
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/// \param status Status to write.
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//------------------------------------------------------------------------------
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static void AT26_WriteStatus(At26 *pAt26, unsigned char status)
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{
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unsigned char error;
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SANITY_CHECK(pAt26);
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// Issue a write status command
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error = AT26_SendCommand(pAt26, AT26_WRITE_STATUS, 1, &status, 1, 0, 0, 0);
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ASSERT(!error, "-F- AT26_WriteStatus: Failed to issue command.\n\r");
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while (AT26_IsBusy(pAt26));
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}
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//------------------------------------------------------------------------------
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/// Waits for the serial flash device to become ready to accept new commands.
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/// \param pAt26 Pointer to an AT26 driver instance.
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//------------------------------------------------------------------------------
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static void AT26_WaitReady(At26 *pAt26)
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{
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unsigned char ready = 0;
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SANITY_CHECK(pAt26);
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// Read status register and check busy bit
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while (!ready) {
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ready = ((AT26_ReadStatus(pAt26) & AT26_STATUS_RDYBSY) == AT26_STATUS_RDYBSY_READY);
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}
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}
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//------------------------------------------------------------------------------
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/// Reads and returns the serial flash device ID.
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/// \param pAt26 Pointer to an AT26 driver instance.
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//------------------------------------------------------------------------------
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static unsigned int AT26_ReadJedecId(At26 *pAt26)
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{
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unsigned char error;
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unsigned int id = 0;
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SANITY_CHECK(pAt26);
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// Issue a read ID command
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error = AT26_SendCommand(pAt26, AT26_READ_JEDEC_ID, 1,
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(unsigned char *) &id, 3, 0, 0, 0);
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ASSERT(!error, "-F- AT26_GetJedecId: Could not issue command.\n\r");
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// Wait for transfer to finish
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while (AT26_IsBusy(pAt26));
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return id;
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}
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//------------------------------------------------------------------------------
|
||||
/// Enables critical writes operation on a serial flash device, such as sector
|
||||
/// protection, status register, etc.
|
||||
/// \para pAt26 Pointer to an AT26 driver instance.
|
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//------------------------------------------------------------------------------
|
||||
static void AT26_EnableWrite(At26 *pAt26)
|
||||
{
|
||||
unsigned char error;
|
||||
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||||
SANITY_CHECK(pAt26);
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||||
|
||||
// Issue a write enable command
|
||||
error = AT26_SendCommand(pAt26, AT26_WRITE_ENABLE, 1, 0, 0, 0, 0, 0);
|
||||
ASSERT(!error, "-F- AT26_EnableWrite: Could not issue command.\n\r");
|
||||
|
||||
// Wait for end of transfer
|
||||
while (AT26_IsBusy(pAt26));
|
||||
}
|
||||
|
||||
//------------------------------------------------------------------------------
|
||||
/// Unprotects the contents of the serial flash device.
|
||||
/// Returns 0 if the device has been unprotected; otherwise returns
|
||||
/// SF_PROTECTED.
|
||||
/// \param pAt26 Pointer to an AT26 driver instance.
|
||||
//------------------------------------------------------------------------------
|
||||
static unsigned char AT26_Unprotect(At26 *pAt26)
|
||||
{
|
||||
unsigned char status;
|
||||
|
||||
SANITY_CHECK(pAt26);
|
||||
|
||||
// Get the status register value to check the current protection
|
||||
status = AT26_ReadStatus(pAt26);
|
||||
if ((status & AT26_STATUS_SWP) == AT26_STATUS_SWP_PROTNONE) {
|
||||
|
||||
// Protection already disabled
|
||||
return 0;
|
||||
}
|
||||
|
||||
// Check if sector protection registers are locked
|
||||
if ((status & AT26_STATUS_SPRL) == AT26_STATUS_SPRL_LOCKED) {
|
||||
|
||||
// Unprotect sector protection registers by writing the status reg.
|
||||
AT26_EnableWrite(pAt26);
|
||||
AT26_WriteStatus(pAt26, 0);
|
||||
}
|
||||
|
||||
// Perform a global unprotect command
|
||||
AT26_EnableWrite(pAt26);
|
||||
AT26_WriteStatus(pAt26, 0);
|
||||
|
||||
// Check the new status
|
||||
if ((status & (AT26_STATUS_SPRL | AT26_STATUS_SWP)) != 0) {
|
||||
|
||||
return AT26_ERROR_PROTECTED;
|
||||
}
|
||||
else {
|
||||
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
//------------------------------------------------------------------------------
|
||||
/// Erases all the content of the memory chip.
|
||||
/// \param pAt26 Pointer to an AT26 driver instance.
|
||||
//------------------------------------------------------------------------------
|
||||
static unsigned char AT26_EraseChip(At26 *pAt26)
|
||||
{
|
||||
unsigned char status;
|
||||
unsigned char error;
|
||||
|
||||
SANITY_CHECK(pAt26);
|
||||
|
||||
// Check that the flash is ready an unprotected
|
||||
status = AT26_ReadStatus(pAt26);
|
||||
if ((status & AT26_STATUS_SWP) != AT26_STATUS_SWP_PROTNONE) {
|
||||
|
||||
TRACE_WARNING("AT26_EraseBlock: Device is protected.\n\r");
|
||||
return AT26_ERROR_PROTECTED;
|
||||
}
|
||||
|
||||
// Enable critical write operation
|
||||
AT26_EnableWrite(pAt26);
|
||||
|
||||
// Erase the chip
|
||||
error = AT26_SendCommand(pAt26, AT26_CHIP_ERASE_2, 1, 0, 0, 0, 0, 0);
|
||||
ASSERT(!error, "-F- AT26_ChipErase: Could not issue command.\n\r");
|
||||
while (AT26_IsBusy(pAt26));
|
||||
AT26_WaitReady(pAt26);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
//------------------------------------------------------------------------------
|
||||
/// Erases the specified 4KB block of the serial firmware dataflash.
|
||||
/// Returns 0 if successful; otherwise returns AT26_ERROR_PROTECTED if the
|
||||
/// device is protected or AT26_ERROR_BUSY if it is busy executing a command.
|
||||
/// \param pAt26 Pointer to an AT26 driver instance.
|
||||
/// \param address Address of the block to erase.
|
||||
//------------------------------------------------------------------------------
|
||||
static unsigned char AT26_EraseBlock(At26 *pAt26, unsigned int address)
|
||||
{
|
||||
unsigned char status;
|
||||
unsigned char error;
|
||||
|
||||
SANITY_CHECK(pAt26);
|
||||
|
||||
// Check that the flash is ready an unprotected
|
||||
status = AT26_ReadStatus(pAt26);
|
||||
if ((status & AT26_STATUS_RDYBSY) != AT26_STATUS_RDYBSY_BUSY) {
|
||||
|
||||
TRACE_WARNING("AT26_EraseBlock: Device is not ready.\n\r");
|
||||
return AT26_ERROR_BUSY;
|
||||
}
|
||||
else if ((status & AT26_STATUS_SWP) != AT26_STATUS_SWP_PROTNONE) {
|
||||
|
||||
TRACE_WARNING("AT26_EraseBlock: Device is protected.\n\r");
|
||||
return AT26_ERROR_PROTECTED;
|
||||
}
|
||||
|
||||
// Enable critical write operation
|
||||
AT26_EnableWrite(pAt26);
|
||||
|
||||
// Start the block erase command
|
||||
error = AT26_SendCommand(pAt26, AT26_BLOCK_ERASE_4K, 4, 0, 0, address, 0, 0);
|
||||
ASSERT(!error, "-F- AT26_EraseBlock: Could not issue command.\n\r");
|
||||
while (AT26_IsBusy(pAt26));
|
||||
AT26_WaitReady(pAt26);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
//------------------------------------------------------------------------------
|
||||
/// Writes data at the specified address on the serial firmware dataflash. The
|
||||
/// page(s) to program must have been erased prior to writing. This function
|
||||
/// handles page boundary crossing automatically.
|
||||
/// Returns 0 if successful; otherwise, returns AT26_ERROR_PROGRAM is there has
|
||||
/// been an error during the data programming.
|
||||
/// \param pAt26 Pointer to an AT26 driver instance.
|
||||
/// \param pData Data buffer.
|
||||
/// \param size Number of bytes in buffer.
|
||||
/// \param address Write address.
|
||||
//------------------------------------------------------------------------------
|
||||
static unsigned char AT26_Write(
|
||||
At26 *pAt26,
|
||||
unsigned char *pData,
|
||||
unsigned int size,
|
||||
unsigned int address)
|
||||
{
|
||||
unsigned int pageSize;
|
||||
unsigned int writeSize;
|
||||
unsigned char error;
|
||||
unsigned char status;
|
||||
|
||||
SANITY_CHECK(pAt26);
|
||||
SANITY_CHECK(pData);
|
||||
|
||||
// Retrieve device page size
|
||||
pageSize = AT26_PageSize(&at26);
|
||||
|
||||
// Program one page after the other
|
||||
while (size > 0) {
|
||||
|
||||
// Compute number of bytes to program in page
|
||||
writeSize = min(size, pageSize - (address % pageSize));
|
||||
|
||||
// Enable critical write operation
|
||||
AT26_EnableWrite(pAt26);
|
||||
|
||||
// Program page
|
||||
error = AT26_SendCommand(pAt26, AT26_BYTE_PAGE_PROGRAM, 4,
|
||||
pData, writeSize, address, 0, 0);
|
||||
ASSERT(!error, "-F- AT26_WritePage: Failed to issue command.\n\r");
|
||||
while (AT26_IsBusy(pAt26));
|
||||
AT26_WaitReady(pAt26);
|
||||
|
||||
// Make sure that write was without error
|
||||
status = AT26_ReadStatus(pAt26);
|
||||
if ((status & AT26_STATUS_EPE) == AT26_STATUS_EPE_ERROR) {
|
||||
|
||||
return AT26_ERROR_PROGRAM;
|
||||
}
|
||||
|
||||
size -= writeSize;
|
||||
address += writeSize;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
//------------------------------------------------------------------------------
|
||||
/// Reads data from the specified address on the serial flash.
|
||||
/// \param pAt26 Pointer to an AT26 driver instance.
|
||||
/// \param pData Data buffer.
|
||||
/// \param size Number of bytes to read.
|
||||
/// \param address Read address.
|
||||
//------------------------------------------------------------------------------
|
||||
static void AT26_Read(
|
||||
At26 *pAt26,
|
||||
unsigned char *pData,
|
||||
unsigned int size,
|
||||
unsigned int address)
|
||||
{
|
||||
unsigned char error;
|
||||
|
||||
// Start a read operation
|
||||
error = AT26_SendCommand(pAt26, AT26_READ_ARRAY_LF, 4, pData, size, address, 0, 0);
|
||||
ASSERT(!error, "-F- AT26_Read: Could not issue command.\n\r");
|
||||
while (AT26_IsBusy(pAt26));
|
||||
}
|
||||
|
||||
//------------------------------------------------------------------------------
|
||||
// External functions
|
||||
//------------------------------------------------------------------------------
|
||||
|
||||
//------------------------------------------------------------------------------
|
||||
/// Initializes the serial flash and performs several tests on it.
|
||||
//------------------------------------------------------------------------------
|
||||
int main(void)
|
||||
{
|
||||
unsigned int jedecId;
|
||||
unsigned int numPages;
|
||||
unsigned int pageSize;
|
||||
unsigned int i, j;
|
||||
unsigned int address;
|
||||
unsigned char pBuffer[MAXPAGESIZE];
|
||||
|
||||
// Configure the DBGU
|
||||
TRACE_CONFIGURE(DBGU_STANDARD, 115200, BOARD_MCK);
|
||||
printf("-- Basic Serial Firmware Dataflash Project %s --\n\r", SOFTPACK_VERSION);
|
||||
printf("-- %s\n\r", BOARD_NAME);
|
||||
printf("-- Compiled: %s %s --\n\r", __DATE__, __TIME__);
|
||||
|
||||
// Initialize the SPI and serial flash
|
||||
PIO_Configure(pins, PIO_LISTSIZE(pins));
|
||||
AIC_ConfigureIT(SPI_ID, 0, ISR_Spi);
|
||||
SPID_Configure(&spid, SPI_BASE, SPI_ID);
|
||||
AT26_Configure(&at26, &spid, SPI_CS);
|
||||
AIC_EnableIT(SPI_ID);
|
||||
TRACE_INFO("SPI and AT26 drivers initialized\n\r");
|
||||
|
||||
// Read the JEDEC ID of the device to identify it
|
||||
jedecId = AT26_ReadJedecId(&at26);
|
||||
if (AT26_FindDevice(&at26, jedecId)) {
|
||||
|
||||
TRACE_INFO("%s serial flash detected\n\r", AT26_Name(&at26));
|
||||
}
|
||||
else {
|
||||
|
||||
TRACE_ERROR("Failed to recognize the device (JEDEC ID is 0x%08X).\n\r", jedecId);
|
||||
return 1;
|
||||
}
|
||||
ASSERT(MAXPAGESIZE >= AT26_PageSize(&at26), "-F- MAXPAGESIZE too small\n\r");
|
||||
|
||||
// Get device parameters
|
||||
numPages = AT26_PageNumber(&at26);
|
||||
pageSize = AT26_PageSize(&at26);
|
||||
|
||||
// Unprotected the flash
|
||||
AT26_Unprotect(&at26);
|
||||
TRACE_INFO("Flash unprotected\n\r");
|
||||
|
||||
// Erase the chip
|
||||
TRACE_INFO("Chip is being erased...\n\r");
|
||||
AT26_EraseChip(&at26);
|
||||
TRACE_INFO("Checking erase ...\n\r");
|
||||
|
||||
// Check that the chip has been erased correctly
|
||||
address = 0;
|
||||
for (i=0; i < numPages; i++) {
|
||||
|
||||
TRACE_INFO("Checking page #%u\r", i);
|
||||
AT26_Read(&at26, pBuffer, pageSize, address);
|
||||
for (j=0; j < pageSize; j++) {
|
||||
|
||||
if (pBuffer[j] != 0xFF) {
|
||||
|
||||
TRACE_ERROR("Failed erase on page%u:byte%u\n\r", i, j);
|
||||
TRACE_ERROR(
|
||||
"-E- Expected 0xFF, read 0x%02X\n\r",
|
||||
pBuffer[j]);
|
||||
return 2;
|
||||
}
|
||||
}
|
||||
|
||||
address += pageSize;
|
||||
}
|
||||
TRACE_INFO("Erase successful.\n\r");
|
||||
|
||||
// Program a "walking one" pattern on each page
|
||||
TRACE_INFO("Programming a walking 1 on all pages ...\n\r");
|
||||
address = 0;
|
||||
for (i=0; i < numPages; i++) {
|
||||
|
||||
TRACE_INFO("Programming page #%u\r", i);
|
||||
|
||||
// Fill buffer
|
||||
for (j=0; j < pageSize; j++) {
|
||||
|
||||
pBuffer[j] = 1 << (j & 0x7);
|
||||
}
|
||||
|
||||
// Write buffer
|
||||
AT26_Write(&at26, pBuffer, pageSize, address);
|
||||
|
||||
// Read page back and check result
|
||||
memset(pBuffer, 0, pageSize);
|
||||
AT26_Read(&at26, pBuffer, pageSize, address);
|
||||
|
||||
for (j=0; j < pageSize; j++) {
|
||||
|
||||
if (pBuffer[j] != (1 << (j & 0x7))) {
|
||||
|
||||
TRACE_ERROR("Failed program on page%u:byte%u\n\r", i, j);
|
||||
TRACE_ERROR(
|
||||
"-E- Expected 0x%02X, read 0x%02X\n\r",
|
||||
1 << (j & 0x7),
|
||||
pBuffer[j]);
|
||||
return 3;
|
||||
}
|
||||
}
|
||||
|
||||
address += pageSize;
|
||||
}
|
||||
|
||||
TRACE_INFO("Walking 1 test successful.\n\r");
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue