tms320c6000价格_tms320c6000_tm320c6000网盘(2)

先宏定义一下EMIF相关的寄存器，因为我们要读Flash，所以在二级引导程序运行前要配置EMIF寄存器，

;
;  ======== c6713_emif.s62 ========
;
            .title  "Flash bootup utility"

; global EMIF symbols defined for the c671x family
            .include        boot_c671x.h62

;EMIF Register Addresses for c671x family  
EMIF_GCTL       .equ  0x01800000  ;EMIF global control
EMIF_CE1        .equ  0x01800004  ;address of EMIF CE1 control reg.
EMIF_CE0        .equ  0x01800008  ;EMIF CE0control
EMIF_CE2        .equ  0x01800010  ;EMIF CE2control
EMIF_CE3        .equ  0x01800014  ;EMIF CE3control
EMIF_SDRAMCTL   .equ  0x01800018  ;EMIF SDRAM control
EMIF_SDRAMTIM   .equ  0x0180001c  ;EMIF SDRAM timer
EMIF_SDRAMEXT   .equ  0x01800020  ;EMIF SDRAM extension

; EMIF Register Values specifically for 6713 DSK
EMIF_GCTL_V     .equ  0x00000078  ;
EMIF_CE0_V      .equ  0xffffff23  ;EMIF CE0 SDRAM
EMIF_CE1_V      .equ  0xffffff13  ;EMIF CE1 Flash 8-bit
EMIF_CE2_V      .equ  0xffffbf93 ;EMIF CE2 Daughtercard 32-bit async
EMIF_CE3_V      .equ  0xffffff13  ;EMIF CE3 Daughtercard 32-bit async
EMIF_SDRAMCTL_V .equ  0x53115000  ;EMIF SDRAM control
EMIF_SDRAMTIM_V .equ  0x00000578  ;SDRAM timing (refresh)
EMIF_SDRAMEXT_V .equ  0x000a8529  ;SDRAM extended control

宏定义的EMIF寄存器声明为全局符号，.global与C语言中的extern效果一致，声明为外部符号。

;
;  ======== boot_c671x.h62 ========
;

    .if ($isdefed("BOOT_C671X_") = 0)  ; prevent multiple includes of this file
BOOT_C671X_ .set    1

; EMIF Register Addresses for c671x family         
        .global EMIF_GCTL         ;EMIF global control
        .global EMIF_CE1          ;address of EMIF CE1 control reg.
        .global EMIF_CE0          ;EMIF CE0control
        .global EMIF_CE2          ;EMIF CE2control
        .global EMIF_CE3          ;EMIF CE3control
        .global EMIF_SDRAMCTL     ;EMIF SDRAM control
        .global EMIF_SDRAMTIM     ;EMIF SDRAM timer
        .global EMIF_SDRAMEXT     ;EMIF SDRAM extension

; EMIF Register Values for c671x family
        .global EMIF_GCTL_V       ;
        .global EMIF_CE0_V        ;EMIF CE0 SDRAM
        .global EMIF_CE1_V        ;EMIF CE1 Flash 8-bit
        .global EMIF_CE2_V        ;EMIF CE2 Daughtercard 32-bit async
        .global EMIF_CE3_V        ;EMIF CE3 Daughtercard 32-bit async
        .global EMIF_SDRAMCTL_V   ;EMIF SDRAM control
        .global EMIF_SDRAMTIM_V   ;SDRAM timing (refresh)
        .global EMIF_SDRAMEXT_V   ;SDRAM extended control

    .endif      ; if BOOT_C671X_ is not defined

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