bootloader_smbus.c File Reference

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Detailed Description

SMBus Bootloader for ATmega406.

Application note:

AVR453: Smart Battery Reference Design

Documentation:

For comprehensive code documentation, supported compilers, compiler settings and supported devices see readme.html

Author:

Atmel Corporation: http://www.atmel.com
Support email: avr@atmel.com
Original author: Rob G. Fries - Apt Inc.

$Name$

Revision

$RCSfile$

Date

Definition in file bootloader_smbus.c.

#include <inavr.h>
#include "bootldr.h"
#include "iom406.h"
#include "flash.h"

Go to the source code of this file.

Defines
#define	BADPARAM   2
#define	BUSY   1
#define	CRCERROR   3
#define	FAILURE   0xFF
#define	HIGHEST_SMB_CMD   0x3F
#define	MODULE_BOOTLDR
#define	SMB_GenBusTimeout   1
#define	SMB_GotCmdData   4
#define	SMB_SetUpReply   2
#define	SUCCESS   0
#define	TWC_GO   0x85
#define	TWC_READ_NoACK   0x85
#define	TWC_RESTART   0xB5
#define	TWC_START   0xA5
#define	TWC_STOP   0x94
#define	TWS_BERR   0x00
#define	TWS_FINAL   0xC8
#define	TWS_LOST_ARB   0x38
#define	TWS_MASK   0xF8
#define	TWS_NSTAT   0xF8
#define	TWS_RACK   0xB8
#define	TWS_RCMD   0x80
#define	TWS_RDATA   0x80
#define	TWS_READ_ACK   0x40
#define	TWS_READ_NAK   0x48
#define	TWS_REPEAT   0xA0
#define	TWS_RESTART   0x10
#define	TWS_RNAK   0xC0
#define	TWS_RSTOP   0xA0
#define	TWS_RXDATA_ACK   0x50
#define	TWS_RXDATA_NACK   0x58
#define	TWS_SLA_R   0xA8
#define	TWS_SLA_W   0x60
#define	TWS_START   0x08
#define	TWS_TXDATA_ACK   0x28
#define	TWS_TXDATA_NAK   0x30
#define	TWS_WRITE_ACK   0x18
#define	TWS_WRITE_NAK   0x20
Enumerations
enum	{   TW_IDLE = 0, TW_Wait4Cmd, TW_Wait4RW, TW_Wait4Data,   TW_ReplyData, TW_MSLA_W, TW_MCMD_W, TW_MDATA_W }
Functions
void	__low_level_init (void)
unsigned char	EEbusy (void)
void	EEerase (unsigned int address)
unsigned char	EEget (unsigned int address)
void	EEwrite (unsigned int address, unsigned char data)
unsigned char	FastCRC (unsigned char LastCRC, unsigned char newbyte)
void	init_boot (void)
void	LoopMemory (void)
void	main (void)
void	SMB_BusTimeout (void)
void	SMB_CmdInterpreter (void)
void	SMB_Reply (void)
void	SMB_RestoreBus (void)
void	TWI_handler (void)
Variables
unsigned char	BigData
__flash unsigned char	crctable [16] = {0,0x07,0x0E,0x90, 0x1c,0x1b,0x12,0x15, 0x38,0x3F,0x36,0x31, 0x24,0x23,0x2A,0x2D}
__flash unsigned char	crctable2 [16] = {0,0x70,0xE0,0x90, 0xC1,0xB1,0x21,0x51, 0x83,0xF3,0x63,0x13, 0x42,0x32,0xA2,0xD2}
unsigned char	ctr
unsigned char	dest_i
unsigned int	eptr
unsigned char __flash *	fptr
unsigned char	himemptr
unsigned char	lomemptr
unsigned char	LoopFlag
unsigned char	SRAMbuffer [128]
unsigned char	src_i
unsigned char	Status
unsigned char	TW_RxBuf [36]
unsigned char	TW_RxBufCnt
unsigned char	TW_RxBufIndex
unsigned char	TW_state
unsigned char	TW_TxBuf [36]
unsigned char	TW_TxBufCnt
unsigned char	TW_TxBufIndex
unsigned char	TWI_CmdFlags
unsigned char	UsePEC

---

Define Documentation

#define BADPARAM   2

Definition at line 152 of file bootloader_smbus.c.

Referenced by SMB_CmdInterpreter().

#define BUSY   1

Definition at line 151 of file bootloader_smbus.c.

Referenced by SMB_CmdInterpreter().

#define CRCERROR   3

Definition at line 153 of file bootloader_smbus.c.

Referenced by SMB_CmdInterpreter().

#define FAILURE   0xFF

Definition at line 154 of file bootloader_smbus.c.

Referenced by SMB_CmdInterpreter().

#define HIGHEST_SMB_CMD   0x3F

Definition at line 65 of file bootloader_smbus.c.

Referenced by TWI_ISR().

#define MODULE_BOOTLDR

Definition at line 46 of file bootloader_smbus.c.

#define SMB_GenBusTimeout   1

Definition at line 144 of file bootloader_smbus.c.

Referenced by main(), SMB_CmdInterpreter(), TWI_handler(), and TWI_ISR().

#define SMB_GotCmdData   4

Definition at line 146 of file bootloader_smbus.c.

Referenced by main(), SMB_CmdInterpreter(), TWI_handler(), and TWI_ISR().

#define SMB_SetUpReply   2

Definition at line 145 of file bootloader_smbus.c.

Referenced by main(), SMB_CmdInterpreter(), TWI_handler(), and TWI_ISR().

#define SUCCESS   0

Definition at line 150 of file bootloader_smbus.c.

Referenced by init_boot(), LoopMemory(), and SMB_CmdInterpreter().

#define TWC_GO   0x85

Definition at line 105 of file bootloader_smbus.c.

#define TWC_READ_NoACK   0x85

Definition at line 106 of file bootloader_smbus.c.

#define TWC_RESTART   0xB5

Definition at line 109 of file bootloader_smbus.c.

#define TWC_START   0xA5

Definition at line 107 of file bootloader_smbus.c.

#define TWC_STOP   0x94

Definition at line 108 of file bootloader_smbus.c.

#define TWS_BERR   0x00

Definition at line 100 of file bootloader_smbus.c.

#define TWS_FINAL   0xC8

Definition at line 99 of file bootloader_smbus.c.

#define TWS_LOST_ARB   0x38

Definition at line 82 of file bootloader_smbus.c.

#define TWS_MASK   0xF8

Definition at line 72 of file bootloader_smbus.c.

#define TWS_NSTAT   0xF8

Definition at line 73 of file bootloader_smbus.c.

#define TWS_RACK   0xB8

Definition at line 97 of file bootloader_smbus.c.

Referenced by TWI_handler(), and TWI_ISR().

#define TWS_RCMD   0x80

Definition at line 94 of file bootloader_smbus.c.

Referenced by TWI_handler(), and TWI_ISR().

#define TWS_RDATA   0x80

Definition at line 93 of file bootloader_smbus.c.

Referenced by TWI_handler(), and TWI_ISR().

#define TWS_READ_ACK   0x40

Definition at line 84 of file bootloader_smbus.c.

#define TWS_READ_NAK   0x48

Definition at line 85 of file bootloader_smbus.c.

#define TWS_REPEAT   0xA0

Definition at line 96 of file bootloader_smbus.c.

Referenced by TWI_handler(), and TWI_ISR().

#define TWS_RESTART   0x10

Definition at line 77 of file bootloader_smbus.c.

#define TWS_RNAK   0xC0

Definition at line 98 of file bootloader_smbus.c.

Referenced by TWI_handler(), and TWI_ISR().

#define TWS_RSTOP   0xA0

Definition at line 95 of file bootloader_smbus.c.

Referenced by TWI_handler(), and TWI_ISR().

#define TWS_RXDATA_ACK   0x50

Definition at line 86 of file bootloader_smbus.c.

#define TWS_RXDATA_NACK   0x58

Definition at line 87 of file bootloader_smbus.c.

#define TWS_SLA_R   0xA8

Definition at line 92 of file bootloader_smbus.c.

Referenced by TWI_handler(), and TWI_ISR().

#define TWS_SLA_W   0x60

Definition at line 91 of file bootloader_smbus.c.

Referenced by TWI_handler(), and TWI_ISR().

#define TWS_START   0x08

Definition at line 76 of file bootloader_smbus.c.

Referenced by TWI_ISR().

#define TWS_TXDATA_ACK   0x28

Definition at line 80 of file bootloader_smbus.c.

Referenced by TWI_ISR().

#define TWS_TXDATA_NAK   0x30

Definition at line 81 of file bootloader_smbus.c.

#define TWS_WRITE_ACK   0x18

Definition at line 78 of file bootloader_smbus.c.

Referenced by TWI_ISR().

#define TWS_WRITE_NAK   0x20

Definition at line 79 of file bootloader_smbus.c.

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Enumeration Type Documentation

anonymous enum

Enumerator:

TW_IDLE
TW_Wait4Cmd
TW_Wait4RW
TW_Wait4Data
TW_ReplyData
TW_MSLA_W
TW_MCMD_W
TW_MDATA_W

Definition at line 516 of file bootloader_smbus.c.

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Function Documentation

void __low_level_init

(

void

)

Todo:

EXCEPTION: if the Watchdog flag is asserted, there is a POSSIBILITY that there's a problem with the App code image. It is left to the user to determine if this is the case and to take remedial action.

Todo:

Add code here to handle Wdog reset.

Definition at line 174 of file bootloader_smbus.c.

unsigned char EEbusy

(

void

)

Definition at line 735 of file bootloader_smbus.c.

Referenced by LoopMemory().

void EEerase

(

unsigned int

address

)

Definition at line 750 of file bootloader_smbus.c.

Referenced by LoopMemory().

unsigned char EEget

(

unsigned int

address

)

Definition at line 742 of file bootloader_smbus.c.

Referenced by SMB_CmdInterpreter().

void EEwrite	(	unsigned int	address,
		unsigned char	data
	)

Definition at line 758 of file bootloader_smbus.c.

Referenced by LoopMemory().

unsigned char FastCRC	(	unsigned char	LastCRC,
		unsigned char	newbyte
	)

Definition at line 1081 of file bootloader_smbus.c.

Referenced by SMB_CmdInterpreter(), SMB_Master(), and SMB_Reply().

void init_boot

(

void

)

Definition at line 202 of file bootloader_smbus.c.

References BigData, LoopFlag, SMB_RestoreBus(), Status, SUCCESS, TW_RxBufCnt, TW_RxBufIndex, TW_state, TW_TxBufCnt, TW_TxBufIndex, and UsePEC.

Referenced by main().

void LoopMemory

(

void

)

Definition at line 772 of file bootloader_smbus.c.

References ctr, dest_i, EEbusy(), EEerase(), EEwrite(), eptr, LoopFlag, SRAMbuffer, Status, and SUCCESS.

Referenced by main().

void main

(

void

)

Definition at line 458 of file bootloader_smbus.c.

References init_boot(), LoopFlag, LoopMemory(), SMB_BusTimeout(), SMB_CmdInterpreter(), SMB_GenBusTimeout, SMB_GotCmdData, SMB_Reply(), SMB_SetUpReply, TWI_CmdFlags, and TWI_handler().

void SMB_BusTimeout

(

void

)

Definition at line 692 of file bootloader_smbus.c.

References SMB_RestoreBus().

Referenced by main(), and SMB_CmdInterpreter().

void SMB_CmdInterpreter

(

void

)

Todo:

Add code here if encryption is desired.

Todo:

Add code here if encryption is desired.

Definition at line 804 of file bootloader_smbus.c.

References _ENABLE_RWW_SECTION, _FILL_TEMP_WORD, _PAGE_ERASE, _PAGE_WRITE, _WAIT_FOR_SPM, BADPARAM, BigData, BUSY, CRCERROR, ctr, dest_i, EEget(), eptr, FAILURE, FastCRC(), fptr, himemptr, lomemptr, LoopFlag, SMB_BusTimeout(), SRAMbuffer, src_i, Status, SUCCESS, TW_RxBuf, TW_RxBufCnt, TW_RxBufIndex, TWRX_BLKCNT, TWRX_CMD, TWRX_DATA, TWRX_HIADDR, TWRX_LOADDR, TWRX_MEM, TWRX_OFFSET, TWRX_SIZE, and UsePEC.

Referenced by main().

void SMB_Reply

(

void

)

Definition at line 703 of file bootloader_smbus.c.

References FastCRC(), SMBV_Opt5, Status, TW_TxBuf, TW_TxBufCnt, TW_TxBufIndex, and TWI_CmdFlags.

Referenced by main().

void SMB_RestoreBus

(

void

)

Definition at line 1051 of file bootloader_smbus.c.

References TW_IDLE, and TW_state.

Referenced by generictimer0expired(), init_boot(), InitSMBus(), and SMB_BusTimeout().

void TWI_handler

(

void

)

Definition at line 518 of file bootloader_smbus.c.

References SMB_GenBusTimeout, SMB_GotCmdData, SMB_SetUpReply, SMBV_Opt5, Status, TW_IDLE, TW_ReplyData, TW_RxBuf, TW_RxBufCnt, TW_RxBufIndex, TW_state, TW_TxBuf, TW_TxBufCnt, TW_TxBufIndex, TW_Wait4Cmd, TW_Wait4Data, TW_Wait4RW, TWI_CmdFlags, TWS_RACK, TWS_RCMD, TWS_RDATA, TWS_REPEAT, TWS_RNAK, TWS_RSTOP, TWS_SLA_R, TWS_SLA_W, and UsePEC.

Referenced by main().

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Variable Documentation

unsigned char BigData

Definition at line 127 of file bootloader_smbus.c.

Referenced by init_boot(), and SMB_CmdInterpreter().

__flash unsigned char crctable[16] = {0,0x07,0x0E,0x90, 0x1c,0x1b,0x12,0x15, 0x38,0x3F,0x36,0x31, 0x24,0x23,0x2A,0x2D}

Definition at line 1078 of file bootloader_smbus.c.

__flash unsigned char crctable2[16] = {0,0x70,0xE0,0x90, 0xC1,0xB1,0x21,0x51, 0x83,0xF3,0x63,0x13, 0x42,0x32,0xA2,0xD2}

Definition at line 1079 of file bootloader_smbus.c.

unsigned char ctr

Definition at line 130 of file bootloader_smbus.c.

Referenced by CCarray_Average(), FillResponseStr(), LoopMemory(), and SMB_CmdInterpreter().

unsigned char dest_i

Definition at line 129 of file bootloader_smbus.c.

Referenced by LoopMemory(), and SMB_CmdInterpreter().

unsigned int eptr

Definition at line 134 of file bootloader_smbus.c.

Referenced by LoopMemory(), and SMB_CmdInterpreter().

unsigned char __flash* fptr

Definition at line 133 of file bootloader_smbus.c.

Referenced by SMB_CmdInterpreter().

unsigned char himemptr

Definition at line 132 of file bootloader_smbus.c.

Referenced by SMB_CmdInterpreter().

unsigned char lomemptr

Definition at line 131 of file bootloader_smbus.c.

Referenced by SMB_CmdInterpreter().

unsigned char LoopFlag

Definition at line 126 of file bootloader_smbus.c.

Referenced by init_boot(), LoopMemory(), main(), and SMB_CmdInterpreter().

unsigned char SRAMbuffer[128]

Definition at line 136 of file bootloader_smbus.c.

Referenced by LoopMemory(), and SMB_CmdInterpreter().

unsigned char src_i

Definition at line 128 of file bootloader_smbus.c.

Referenced by SMB_CmdInterpreter().

unsigned char Status

Definition at line 149 of file bootloader_smbus.c.

Referenced by init_boot(), LoopMemory(), SMB_CmdInterpreter(), SMB_Reply(), TWI_handler(), and TWI_ISR().

unsigned char TW_RxBuf[36]

Definition at line 119 of file bootloader_smbus.c.

Referenced by SMB_CmdInterpreter(), SMBW_AtRate(), SMBW_BattMode(), SMBW_MfrAccess(), SMBW_Opt4(), SMBW_RemCapAlm(), SMBW_RemTimeAlm(), TWI_handler(), and TWI_ISR().

unsigned char TW_RxBufCnt

Definition at line 120 of file bootloader_smbus.c.

Referenced by init_boot(), SMB_CmdInterpreter(), TWI_handler(), and TWI_ISR().

unsigned char TW_RxBufIndex

Definition at line 121 of file bootloader_smbus.c.

Referenced by init_boot(), SMB_CmdInterpreter(), SMBW_AtRate(), SMBW_BattMode(), SMBW_MfrAccess(), SMBW_Opt4(), SMBW_RemCapAlm(), SMBW_RemTimeAlm(), TWI_handler(), and TWI_ISR().

unsigned char TW_state

Definition at line 123 of file bootloader_smbus.c.

Referenced by init_boot(), SMB_RestoreBus(), and TWI_handler().

unsigned char TW_TxBuf[36]

Definition at line 115 of file bootloader_smbus.c.

Referenced by FillResponseInt(), FillResponseStr(), SMB_CmdInterpreter(), SMB_Reply(), TWI_handler(), and TWI_ISR().

unsigned char TW_TxBufCnt

Definition at line 116 of file bootloader_smbus.c.

Referenced by FillResponseInt(), FillResponseStr(), init_boot(), SMB_CmdInterpreter(), SMB_Reply(), TWI_handler(), and TWI_ISR().

unsigned char TW_TxBufIndex

Definition at line 117 of file bootloader_smbus.c.

Referenced by FillResponseInt(), FillResponseStr(), init_boot(), SMB_CmdInterpreter(), SMB_Reply(), TWI_handler(), and TWI_ISR().

unsigned char TWI_CmdFlags

Definition at line 143 of file bootloader_smbus.c.

Referenced by main(), SMB_CmdInterpreter(), SMB_Reply(), TWI_handler(), and TWI_ISR().

unsigned char UsePEC

Definition at line 124 of file bootloader_smbus.c.

Referenced by init_boot(), SMB_CmdInterpreter(), SMB_Master(), TWI_handler(), and TWI_ISR().

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