CY7C68013开发之一：固件开发_总结_AetherWANG

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CY7C68013开发之一：固件开发_总结

(2014-02-25 16:46:53)

标签：

cy7c68013

cyusb

fx2

usb

固件

固件,指的是本来存在EEPROM,上电之后cpy到RAM里面去的那段程序.

固件开发过程的输入是一个keil工程,输出是一个.hex或者.iic文件

keil工程模版为:

C:\Cypress\Cypress Suite USB 3.4.7\Firmware\Bulkloop

其中要改的地方有两处,一个是dscr.a51文件,一个是fw.c文件中的TD_Init();和 TD_Poll();俩函数.

其中dscr.a51是usb设备描述符的配置,描述符的定义和概念与usb2.0协议相关,这个还没有看,不过显然这个.a51程序分成三部分HighSpeedConfigDscr/FullSpeedConfigDscr/StringDscr.我主要是修改了EPx的配置,抄了一篇网上的翻译:

___________________________________________下面是对dscr.a51文件的分析_________________________________________________

该文件主要是一个USB设备的描述符配置表

;;-----------------------------------------------------------------------------

;; File: dscr.a51

;; Contents: This file contains descriptor data tables.

;;

;;-----------------------------------------------------------------------------

;;下面是USB设备的设备描述符类型

;; 设备描述符

;; 配置描述符

;; 接口描述符

;; 端口描述符

;; String字串描述符

;; 装置认可描述符(新添加的,暂时未查到详细信息)

DSCR_DEVICE equ 1 ;; Descriptor type: Device

DSCR_CONFIG equ 2 ;; Descriptor type: Configuration

DSCR_STRING equ 3 ;; Descriptor type: String

DSCR_INTRFC equ 4 ;; Descriptor type: Interface

DSCR_ENDPNT equ 5 ;; Descriptor type: Endpoint

DSCR_DEVQUAL equ 6 ;; Descriptor type: Device Qualifier

;;下面是各描述符的长度

;;设备描述符的长度为18个字节

;;配置描述符的长度为9个字节

;;接口描述符的长度为9个字节

;;端口描述符的长度为7个字节

;;(暂时省略)

DSCR_DEVICE_LEN equ 18

DSCR_CONFIG_LEN equ 9

DSCR_INTRFC_LEN equ 9

DSCR_ENDPNT_LEN equ 7

DSCR_DEVQUAL_LEN equ 10

;;下面应该是事务格式,也即传输类型

;;控制传输方式

;;同步

;;批处理

;;中断

ET_CONTROL equ 0 ;; Endpoint type: Control

ET_ISO equ 1 ;; Endpoint type: Isochronous

ET_BULK equ 2 ;; Endpoint type: Bulk

ET_INT equ 3 ;; Endpoint type: Interrupt

public DeviceDscr, DeviceQualDscr, HighSpeedConfigDscr, FullSpeedConfigDscr, StringDscr, UserDscr

;; TGE DSCR SEGMENT CODE

;;-----------------------------------------------------------------------------

;; Global Variables

;;-----------------------------------------------------------------------------

;; TGE rseg DSCR ;; locate the descriptor table in on-part memory.

cseg at 90H ;; TODO: this needs to be changed before release

;;设备描述符的结构

DeviceDscr:

db DSCR_DEVICE_LEN ;; Descriptor length

db DSCR_DEVICE ;; Decriptor type

dw 0002H ;; Specification Version (BCD)

db 00H ;; Device class

db 00H ;; Device sub-class

db 00H ;; Device sub-sub-class

db 64 ;; Maximum packet size

dw 4705H ;; Vendor ID

dw 0210H ;; Product ID (Sample Device)

dw 0000H ;; Product version ID

db 1 ;; Manufacturer string index

db 2 ;; Product string index

db 0 ;; Serial number string index

db 1 ;; Number of configurations

;;装置认可描述符的结构

DeviceQualDscr:

db DSCR_DEVQUAL_LEN ;; Descriptor length

db DSCR_DEVQUAL ;; Decriptor type

dw 0002H ;; Specification Version (BCD)

db 00H ;; Device class

db 00H ;; Device sub-class

db 00H ;; Device sub-sub-class

db 64 ;; Maximum packet size

db 1 ;; Number of configurations

db 0 ;; Reserved

;;高速描述符的结构介绍开始

;;高速配置描述符结构

HighSpeedConfigDscr:

db DSCR_CONFIG_LEN ;; Descriptor length

db DSCR_CONFIG ;; Descriptor type

db (HighSpeedConfigDscrEnd-HighSpeedConfigDscr) mod 256 ;; Total Length (LSB)

db (HighSpeedConfigDscrEnd-HighSpeedConfigDscr) / 256 ;; Total Length (MSB)

db 1 ;; Number of interfaces

db 1 ;; Configuration number

db 0 ;; Configuration string

db 10100000b ;; Attributes (b7 - buspwr, b6 - selfpwr, b5 - rwu)

db 50 ;; Power requirement (div 2 ma)

;;高速接口描述符结构

;; Interface Descriptor

db DSCR_INTRFC_LEN ;; Descriptor length

db DSCR_INTRFC ;; Descriptor type

db 0 ;; Zero-based index of this interface

db 0 ;; Alternate setting

db 2 ;; Number of end points

db 0ffH ;; Interface class

db 00H ;; Interface sub class

db 00H ;; Interface sub sub class

db 0 ;; Interface descriptor string index

;;高速端口描述符结构(出端点)

;; Endpoint Descriptor

db DSCR_ENDPNT_LEN ;; Descriptor length

db DSCR_ENDPNT ;; Descriptor type

db 02H ;; Endpoint number, and direction

db ET_BULK ;; Endpoint type

db 00H ;; Maximun packet size (LSB)

db 02H ;; Max packect size (MSB)

db 00H ;; Polling interval

;;高速端口描述符结构(入端点)

;; Endpoint Descriptor

db DSCR_ENDPNT_LEN ;; Descriptor length

db DSCR_ENDPNT ;; Descriptor type

db 86H ;; Endpoint number, and direction

db ET_BULK ;; Endpoint type

db 00H ;; Maximun packet size (LSB)

db 02H ;; Max packect size (MSB)

db 00H ;; Polling interval

HighSpeedConfigDscrEnd:

;;高速描述符结构介绍完毕

;;全速描述符结构介绍开始

;;全速配置描述符

FullSpeedConfigDscr:

db DSCR_CONFIG_LEN ;; Descriptor length

db DSCR_CONFIG ;; Descriptor type

db (FullSpeedConfigDscrEnd-FullSpeedConfigDscr) mod 256 ;; Total Length (LSB)

db (FullSpeedConfigDscrEnd-FullSpeedConfigDscr) / 256 ;; Total Length (MSB)

db 1 ;; Number of interfaces

db 1 ;; Configuration number

db 0 ;; Configuration string

db 10100000b ;; Attributes (b7 - buspwr, b6 - selfpwr, b5 - rwu)

db 50 ;; Power requirement (div 2 ma)

;;全速接口描述符

;; Interface Descriptor

db DSCR_INTRFC_LEN ;; Descriptor length

db DSCR_INTRFC ;; Descriptor type

db 0 ;; Zero-based index of this interface

db 0 ;; Alternate setting

db 2 ;; Number of end points

db 0ffH ;; Interface class

db 00H ;; Interface sub class

db 00H ;; Interface sub sub class

db 0 ;; Interface descriptor string index

;;全速端点描述符(出端点)

;; Endpoint Descriptor

db DSCR_ENDPNT_LEN ;; Descriptor length

db DSCR_ENDPNT ;; Descriptor type

db 02H ;; Endpoint number, and direction

db ET_BULK ;; Endpoint type

db 40H ;; Maximun packet size (LSB)

db 00H ;; Max packect size (MSB)

db 00H ;; Polling interval

;;全速端点描述符(入端点)

;; Endpoint Descriptor

db DSCR_ENDPNT_LEN ;; Descriptor length

db DSCR_ENDPNT ;; Descriptor type

db 86H ;; Endpoint number, and direction

db ET_BULK ;; Endpoint type

db 40H ;; Maximun packet size (LSB)

db 00H ;; Max packect size (MSB)

db 00H ;; Polling interval

FullSpeedConfigDscrEnd:

;;全速描述符介绍完毕

;;下面是字串描述符介绍

StringDscr:

StringDscr0:

db StringDscr0End-StringDscr0 ;; String descriptor length

db DSCR_STRING

db 09H,04H

StringDscr0End:

StringDscr1:

db StringDscr1End-StringDscr1 ;; String descriptor length

db DSCR_STRING

db 'S',00

db 'R',00

db 'C',00

db 'O',00

db 'U',00

db 'T',00

db '_',00

db 'S',00

db ' ',00

db 'v',00

db '0',00

db '.',00

db '2',00

db '.',00

db '0',00

StringDscr1End:

StringDscr2:

db StringDscr2End-StringDscr2 ;; Descriptor length

db DSCR_STRING

db 'E',00

db 'Z',00

db '-',00

db 'U',00

db 'S',00

db 'B',00

db ' ',00

db 'F',00

db 'X',00

db '2',00

db ' ',00

db 'D',00

db 'K',00

db ' ',00

db 'B',00

db 'O',00

db 'A',00

db 'R',00

db 'D',00

db ' ',00

db 'W',00

db '/',00

db 'L',00

db 'O',00

db 'G',00

db 'I',00

db 'C',00

db ' ',00

db 'A',00

db 'N',00

db 'A',00

db 'L',00

db 'Y',00

db 'Z',00

db 'E',00

db 'R',00

StringDscr2End:

UserDscr:

dw 0000H

end

_________________________________________________________________

疑问: 在分析dscr,a51文件时,得知该文件是一个USB设备固件描述符表,有一个疑问就是里面只列出了高速设备和全速设备的描述符,而且这两种描述符中还只包括了ET-BULK(应该批处理传输)的方式,其它(中断、控制、同步）的在哪里定义了啊，而且对于低速设备不用做描述吗

第二部分就是两个函数了,函数就是直接配置寄存器,寄存器定义参考

FX2 TechRefManual.pdf @C:\Cypress\USB\Doc\FX2

由于slaveFIFO不需要void TD_Poll(void) 进行操作,这里只分析void TD_Init( void )

代码之前是寄存器说明,在手册里面寄存器一章一开始:

Most registers deal with endpoints. The general register format is DDDnFFF, where:

DDD is endpoint direction, IN or OUT with respect to the USB host.

n is the endpoint number, where:

•“ISO” indicates isochronous endpoints as a group.

FFF is the function, where:

• CS is a control and status register

• IRQ is an Interrupt Request bit

• IE is an Interrupt Enable bit

• BC, BCL, and BCH are byte count registers. BC is used for single byte counts, and

BCH/BCL are used as the high and low bytes of 16-bit byte counts.

• DATA is a single-register access to a FIFO.

• BUF is the start address of a buffer.

void TD_Init( void )

{ // Called once at startup

// BYTE i;

// set the CPU clock to 48MHz

CPUCS = ((CPUCS & ~bmCLKSPD) | bmCLKSPD1) ;

// SYNCDELAY;

// REVCTL = 0x03;

SYNCDELAY;

IFCONFIG |= 0x43; //外部时钟(IFCLK pin),48MHz(产生的内部时钟,没用),内部时钟不输出,IFCLK signal不反转,同步方式 sync,接口方式:Slave FIFO

// IFCONFIG = 0x03; // slave fifo, internal clk, async

// IFCONFIG = 0xc3; // slave fifo, external clk, sync

SYNCDELAY;

EP2CFG = 0xA0; // 有效,EP2 is DIR=OUT, TYPE=BULK, SIZE=512bytes, BUF=4x

// EP2CFG = 0xA2; // EP2 is DIR=OUT, TYPE=BULK, SIZE=512, BUF=2x

SYNCDELAY;

EP6CFG = 0xE0; // 有效,EP6 is DIR=IN, TYPE=BULK,SIZE=512bytes,BUF=4x

//必须按照这个顺序来RESET FIFO的endpoint

SYNCDELAY;

FIFORESET = 0x80; // reset all FIFOs

SYNCDELAY;

FIFORESET = 0x02;

SYNCDELAY;

FIFORESET = 0x04;

SYNCDELAY;

FIFORESET = 0x06;

SYNCDELAY;

FIFORESET = 0x08;

SYNCDELAY;

FIFORESET = 0x00;

SYNCDELAY;

EP2FIFOCFG = 0x00; // EP2 is AUTOOUT=0, AUTOIN=0, ZEROLEN=0, WORDWIDE=0

SYNCDELAY;

EP2FIFOCFG = 0x11; // EP2 is 不满之前1个clk出现flag,不空之前一个clk出现flag,AUTOOUT=1 usb有数据以后立即放入FIFO的endpoint 不需要cpu处理, AUTOIN=0, ZEROLEN=0, WORDWIDE=1应该是指word

SYNCDELAY;

OUTPKTEND = 0x82; //跳过一个out packet 在EP1

SYNCDELAY;

OUTPKTEND = 0x82;

SYNCDELAY;

EP6AUTOINLENH = 2; // EP6 auto in length: 512

SYNCDELAY;

EP6AUTOINLENL = 0;

SYNCDELAY;

// EP6FIFOCFG = 0x08; //8-bits

EP6FIFOCFG = 0x09; //EP6 is 不满之前1个clk出现flag,不空之前一个clk出现flag,AUTOIN=1.不允许空数据包, WORDWIDE=1应该是指word

// this lets the EP6 auto commit IN packets,

// and sets the slave FIFO data interface to 16-bits

SYNCDELAY;

EP4FIFOCFG = 0x00;

SYNCDELAY;

EP8FIFOCFG = 0x00;

SYNCDELAY; //FLAG控制寄存器全部置为0,FLAGA=PF,FLAGB=FF,FLAGC=EF, 具体FPAG ABCD由addr[1:0]选定,此处ADDR[1:0]=10 选中EP6

PINFLAGSAB = 0x00;

SYNCDELAY;

PINFLAGSCD = 0x00;

SYNCDELAY;

PORTACFG |= 0x01; // configures PORTA.0 as INT0

SYNCDELAY;

FIFOPINPOLAR = 0x04; // all signals active low ,SLWR(slave write) signal active high

EP2FIFOPFH = 0x80; //FIFO的programmable flag控制寄存器组设置当FIFO多于(DECIS=1)或者少于(DECIS=0)一个值(PFC) 默认为半满半空的时候pf置位

EP2FIFOPFL = 0x10; //EP2: FIFO多于(DECIS=1) 8Byte时 PF置位

EP6FIFOPFH = 0x13; //EP6: FIFO少于 2PKT+1024+512Byte时 PF置位

EP6FIFOPFL = 0x00;

OEA = 0x08; //port A output Enable 阻止进入低功耗模式?

}

估计还是看不懂,那么就读一读EZ-USB FX2 Technical Reference Manual的Chapter 9 Slave FIFOs

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