【文章內容簡介】 數(shù)（），RemapMemory函數(shù)主要是設置ROMCON0、ROMCON1和DRAMCON0、DRAMCON1；并將IRQ_SERVICE函數(shù)的地址存入一個內存中的數(shù)組中。. 聲明C主函數(shù)程序入口168 GotoMain DCD $MainEntry行168聲明了GotoMain標號，其被定義為變量$MainEntry的值“main”. 根據(jù)文獻[2]第5657頁中的說明，行170181引入了由連接器預定義的變量值。170 。***********************************************171 IMPORT |Image$$RO$$Base| 。 ROM code start 172 IMPORT |Image$$RO$$Limit| 。 RAM data starts after ROM program173 IMPORT |Image$$RW$$Base| 。 Preinitialised variables174 IMPORT |Image$$ZI$$Base| 。 uninitialised variables175 IMPORT |Image$$ZI$$Limit| 。 End of variable RAM space176 177 BaseOfROM DCD |Image$$RO$$Base|178 TopOfROM DCD |Image$$RO$$Limit|179 BaseOfBSS DCD |Image$$RW$$Base|180 BaseOfZero DCD |Image$$ZI$$Base|181 EndOfBSS DCD |Image$$ZI$$Limit|. 定義從FLASH啟動程序的函數(shù)184 TIP_SIZE EQU 256185 186 IMPORT ResetMemSet187 EXPORT trans_to_boot188 trans_to_boot189 mov lr, r1 。 a2 = r1 190 ldr r1, =ResetMemSet191 ldr r2, BaseOfROM192 sub r2, r1, r2193 add r0, r0, r2 。 a1 = r0194 mov r2, TIP_SIZE195 0 196 ldr r3, [r1], 4197 str r3, [r0], 4198 subs r2, r2, 1199 bne %B0200 201 sub r0, r0, TIP_SIZE*4202 mov pc, r0 行184202定義了從FLASH固定地址BIOS_LOAD＝0x1000啟動程序的函數(shù)，似乎是重新啟動的程序。. 1 INCLUDE 23 RomBaseAddr EQU 04 RomEndAddr EQU amp。205 RamBaseAddr EQU amp。1006 RamEndAddr EQU amp。200 78 AREA text, CODE, READONLY 910 SFR_BASE EQU 0x3ff 。0x3ff000011 SRAM_BASE EQU 0x3f8 。0x3f800001213 。EXPORT InitMemory14 InitMemory15 ldr r0, =SYSCFG16 ldr r1, =SDRAM_ITF :OR: SFR_BASE16 :OR: SRAM_BASE6 :OR: CACHE_ALL :OR: CACHE_EN 17 str r1, [r0]1819 ldr r0, =CLKCON20 ldr r1, =021 str r1, [r0]2223 ldr r0, =EXTACON024 ldr r1, =0x0fff0fff25 str r1, [r0]26 ldr r0, =EXTACON127 ldr r1, =0x0fff0fff 28 str r1, [r0]2930 ldr r0, =EXTDBWTH31 ldr r1, =0xffff55632 str r1, [r0]3334 adr r0, MemCfgPara35 ldmia r0, {r1r11}36 ldr r0, =ROMCON0 37 stmia r0, {r1r11}3839 mov pc, r144041 MemCfgPara42 DCD RomBaseAddr10 :OR RomEndAddr20 :OR: amp。60 。amp。1084006043 DCD amp。1084206044 DCD amp。1084206045 DCD amp。1084206046 DCD amp。1084206047 DCD amp。1084206048 DCD RamBaseAddr10 :OR: RamEndAddr20 :OR: amp。398 。amp。1000039849 DCD amp。1004039850 DCD amp。1004039851 DCD amp。1004039852 DCD amp。ce2983fd 5354 EXPORT RemapMemory55 RemapMemory56 adr r0, RemapMemPara57 ldmia r0, {r1r11}58 ldr r0, =ROMCON059 stmia r0, {r1r11}60 nop61 nop62 ldr r0, =IRQ_SVC_VECTOR63 ldr r1, =IRQ_SERVICE 。IRQ_SVC_VECTOR in ram, so set it after remap64 str r1, [r0]6566 mov pc, r14 6768 RemapMemPara69 DCD amp。1204006070 DCD amp。1084206071 DCD amp。1084206072 DCD amp。1084206073 DCD amp。1084206074 DCD amp。1084206075 DCD amp。1000039876 DCD amp。1004039877 DCD amp。1004039878 DCD amp。1004039879 DCD amp。ce2983fd 8081 EXPORT ResetMemSet82 ResetMemSet83 adr r0, ResetMemPara84 ldmia r0, {r1r11}85 ldr r0, =ROMCON086 stmia r0, {r1r11}87 nop88 nop8990 mov pc, r14 9192 ResetMemPara93 DCD amp。2000006094 DCD amp。0000006095 DCD amp。0000006096 DCD amp。0000006097 DCD amp。0000006098 DCD amp。0000006099 DCD amp。00000000100 DCD amp。00000000101 DCD amp。00000000102 DCD amp。00000000103 DCD amp。000083fd 104105 。*************************************************106 InitInterrupt107 ldr r0, =INTMSK108 ldr r1, =0x3fffff109 str r1, [r0] 。disable all interrupt110111 mov pc, r14 112113 。*************************************************114 InitPort115 ldr r0, =IOPMOD116 ldr r1, =1117 str r1, [r0] 。all input but p0 output118119 ldr r0, =IOPCON120 ldr r1, =0121 str r1, [r0] 。disable XIRQ 03, dma req,ack, timer 0,1 output122123 ldr r0, =IOPDATA124 ldr r1, [r0] 。read input data125126 mov pc, r14 127128 。*************************************************129 InitTimer130 ldr r0, =TMOD131 ldr r1, =0132 str r1, [r0] 。disable timer 0,1133134 mov pc, r14135136 。*************************************************137 UART_DIV_CNT0 EQU 26138 UART_DIV_CNT1 EQU 0139140 InitUart141 ldr r0, =ULCON0142 ldr r1, =DATA8b :OR: STOPb1 :OR PARITY_NO143 str r1, [r0]144145 ldr r0, =UCON0146 ldr r1, =RX_STAT_INT|9147 str r1, [r0]148 149 ldr r0, =UBRDIV0150 ldr r1, =UART_DIV_CNT04|UART_DIV_CNT1151 str r1, [r0] 。if UART_DIV_CNT1==xxx0 baud rate = MCLK/(UART_DIV_CNT0+1)/16152 。if UART_DIV_CNT1==xxx1 baud rate = MCLK/(UART_DIV_CNT0+1)/16/16 153 ldr r0, =URXBUF0154 ldr r1, [r0] 。read rx data155 156 ldr r0, =ULCON1157 ldr r1, =DATA8b :OR: STOPb1 :OR PARITY_NO158 str r1, [r0]159 160 ldr r0, =UCON1161 ldr r1, =RX_STAT_INT|9162 str r1, [r0]163 164 ldr r0, =UBRDIV1165 ldr r1, =UART_DIV_CNT04|UART_DIV_CNT1166 str r1, [r0] 。if UART_DIV_CNT1==xxx0 baud rate = MCLK/(UART