📄 initbdi_key(f,r,m,c)ok.s
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bl delay20ms
LDR R2,=PIO_ISR
LDR R0,[R2]
LDR R2,=CS4_addr
ldrb r1,=0x00
strb r1,[r2];re enable
;-----------------------------------------------------------------------
;- Restore used registers and LR_usr from the System/User Stack
ldmfd sp!, {r0-r4,r14}
;- Mark the End of Interrupt on the interrupt controller
ldr r0, = AIC_BASE
str r0, [r0, #AIC_EOICR]
;- Restore SPSR_irq and r0 from the IRQ stack
ldmfd sp!, {r0, r14}
msr SPSR, r14
;- Restore ajusted LR_irq from IRQ stack directly in the PC
ldmfd sp!, {pc}^
;-------------------------------------------------------------------
COM_download STMFD sp!,{R0-R2,R5,lr}
; BL on_p7;START TRANSFER
LDR R1,=send_bufffer;ADDR OF STRING
LDR R0,=0x434C4557;WELC
STR R0,[R1]
LDR R0,=0x21454D4F;OME!
STR R0,[R1,#4]
LDR R5,=0x00000008
BL sendstring
BL getbyte
CMP R5,#82;"R"
BNE COM_ERROR
LDR R5,=0x00000041;"A"
BL sendbyte
LDR R5,=0x00000004;get the start address of download
BL getstring
LDR R1,=receive_bufffer;save the start address
LDR R0,[R1]
LDR R2,=addr_download
STR R0,[R2]
; BL DISPLAY_R0
LDR R5,=0x00000053;"S"
BL sendbyte
LDR R5,=0x00000004;get the sector size of download,128 bytes/sector
BL getstring
LDR R0,[R1];save the sector size
LDR R2,=secsize_download
STR R0,[R2]
; BL DISPLAY_R0
SEC_WRI BL getbyte
CMP R5,#71;"G"
BNE COM_downloadEND
LDR R5,=0x00000047;"G"
BL sendbyte;start sector write
LDR R5,=0x00000080;get a sector(128 bytes)
BL getstring
BL BUF2ROM
LDR R2,=secsize_download
LDR R0,[R2]
SUB R0,R0,#1
CMP R0,#0
BEQ END_FILE
STR R0,[R2]
B SEC_WRI
END_FILE
LDR R5,=0x00000045;"E"
BL sendbyte;END OF TRANSFER
BL TRANSFEROK
COM_downloadEND
LDMFD sp!,{R0-R2,R5,PC};Return
COM_ERROR
; BL off_p7
;B COM_downloadEND
B COM_ERROR
TRANSFEROK STMFD sp!,{lr}
; BL on_p7
LDMFD sp!,{PC};Return
COM_Display
STMFD sp!,{R0-R4,lr}
;Display-R,(Register)
; M,(Memory)
LDR R5,=0x00000041;"A"
BL sendbyte
BL getbyte
CMP R5,#0x52;"R" File
bleq COM_Register
CMP R5,#0x4D;"M" Display
bleq COM_Memory
LDMFD sp!,{R0-R4,PC};Return
COM_Register
STMFD sp!,{R0-R4,lr}
;display R,(Register) 128-Byte
LDR R5,=0x00000041;"A"
BL sendbyte
BL getbyte
CMP R5,#0x52;"R" reply
LDR R2,=debug_SP_End
STR R0,[R2]
LDR R2,=s_addr_display
STR R0,[R2]
LDR R5,=0x00000118
BL send_MEM_UART0
;s_addr_display,280-byte(0x118)r0-r15
LDMFD sp!,{R0-R4,PC};Return
COM_Memory
STMFD sp!,{R0-R4,lr}
;display M,(Memory) 128-Byte
LDR R5,=0x00000041;"A"
BL sendbyte
LDR R5,=0x00000004;get the start address of download
BL getstring
LDR R5,=0x00000041;"A"
BL sendbyte
BL getbyte
CMP R5,#0x52;"R" File
LDR R1,=receive_bufffer;save the start address
LDR R0,[R1]
LDR R2,=s_addr_display
STR R0,[R2]
LDR R5,=0x00000100
BL send_MEM_UART0
;s_addr_display,256-byte(0x100)
LDMFD sp!,{R0-R4,PC};Return
send_MEM_UART0
STMFD sp!,{R0-R4,lr}
;s_addr_display
;R5:COUNT OF TRANSMIT LOW 16-BIT
;SET R5,BEFORE CALL,256-byte(0x100)
LDR R0,=USART0
send_MEMwait2 LDR R1,[R0,#0x14];US_CSR
LDR R2,=0xFFFFFFEF
BIC R1,R1,R2;ENDTX
CMP R1,#0
BEQ send_MEMwait2
LDR R2,=s_addr_display;start ADDR OF MEM
ldr r1,[r2]
STR R1,[R0,#0x38];US_TPR
;ADDR OF TRANSMITTER POIONTER
STR R5,[R0,#0x3C];US_TCR
send_MEMwait4 LDR R1,[R0,#0x14];US_CSR
LDR R2,=0xFFFFFFEF
BIC R1,R1,R2;ENDTX
CMP R1,#0
BEQ send_MEMwait4
LDMFD sp!,{R0-R4,PC};Return
COM_Change
STMFD sp!,{R0-R5,lr}
LDR R5,=0x00000041;"A"
BL sendbyte
LDR R5,=0x00000004;get the address to change
BL getstring
ldr r2,=receive_bufffer
ldr r0,[r2]
LDR R5,=0x00000041;"A"
BL sendbyte
LDR R5,=0x00000004;get the Value
BL getstring
ldr r2,=receive_bufffer
ldr r1,[r2]
str r1,[r0]
LDR R5,=0x00000041;"A"
BL sendbyte
LDMFD sp!,{R0-R5,PC};Return
BUF2ROM STMFD sp!,{R0-R4,lr}
LDR R2,=0x00000D80;END OF RECEIVE_BUFFER
LDR R1,=receive_bufffer
SUB R1,R1,#4
LDR R4,=addr_download
LDR R3,[R4]
SUB R3,R3,#4
BUFWRI_LOOP LDR R0,[R1,#4]!
STR R0,[R3,#4]!
CMP R1,R2;RECEIVE_BUFFFER END
BNE BUFWRI_LOOP
STR R3,[R4]
;SECTOR WRITE OK,CAN WAIT 10MS OR NOT
LDMFD sp!,{R0-R4,PC};Return
;GETCHAR STMFD sp!,{R0-R2,R5,lr}
BL getbyte
SUB R5,R5,#0x20
MOV R5,R5,LSL #16
LDR R1,=0x0000C000;写RAM且地址+1
ADD R2,R2,R1
LDR R0,=LCDparam
STR R2,[R0];param
;BL PR11;
; BL on_p7
LDMFD sp!,{R0-R2,R5,PC};Return
;WRIstring
;正常显示字符串，以0x00结尾
;入口:r6=字符串首地址!
;GETSTRING STMFD sp!,{R0-R2,R5-R6,lr}
LDR R5,=0x00000003;HI!
BL getstring
LDR R1,=receive_bufffer
LDR R0,[R1]
LDR R2,=0xFF000000
BIC R0,R0,R2;
STR R0,[R1]
MOV R6,R1
; BL WRIstring
; BL on_p7
LDMFD sp!,{R0-R2,R5-R6,PC};Return
test_USART0 STMFD sp!,{R0-R1,lr}
bl init_USART0
test_USART0_loop
ldr R5,=0x55
bl sendbyte
b test_USART0_loop
LDMFD sp!,{R0-R1,PC};Return
init_USART0
STMFD sp!,{R0-R1,lr}
LDR R0,=USART0
;BL DISPLAY_R0
; LDR R1,=0x000000C0;Normal mode,1 stop bit,even parity,
;Asynchoronous mode,8-bit,MCKI,
LDR R1,=0x000008C0;Normal mode,1 stop bit,even parity,
;Asynchoronous mode,8-bit,MCKI,
STR R1,[R0,#0x04];US_MR
LDR R1,=0x0000000D;115200 BPS
STR R1,[R0,#0x20];US_BRGR
LDR R1,=0x0
STR R1,[R0,#0x24];US_RTOR Disable Receive Time-out
LDR R1,=0x0
STR R1,[R0,#0x28];US_TTGR Disable Transmitter time-guard
LDR R1,=0x00000004;Reset Receiver
STR R1,[R0];US_CR
LDR R1,=0x00000008;Reset Transmitter
STR R1,[R0];US_CR
LDR R1,=0x00000100;Reset Status bits
STR R1,[R0];US_CR
LDR R1,=0x00000010;Receiver Enable
STR R1,[R0];US_CR
LDR R1,=0x00000040;Transmitter Enable
STR R1,[R0];US_CR
LDR R1,=0xFFFFFE1B;DISENABLE INTERRUPT
STR R1,[R0,#0x0C] ;US_IDR
LDR R1,=0x000001E4;ENABLE INTERRUPT
STR R1,[R0,#0x08] ;US_IER
;PROSESS ERROR IN TRANSMIT & RECEIVE
; BL on_p7
LDMFD sp!,{R0-R1,PC};Return
sendbyte STMFD sp!,{R0-R2,lr}
;R5:low 8-bit
LDR R0,=USART0
sendbytewait LDR R1,[R0,#0x14];US_CSR
LDR R2,=0xFFFFFFFD
BIC R1,R1,R2;TXRDY
CMP R1,#2
BNE sendbytewait
STR R5,[R0,#0x1C];US_THR
LDMFD sp!,{R0-R2,PC};Return
sendstring STMFD sp!,{R0-R2,lr}
;R5:COUNT OF TRANSMIT LOW 16-BIT
;SET R5,BEFORE CALL
LDR R0,=USART0
sendstrwait2 LDR R1,[R0,#0x14];US_CSR
LDR R2,=0xFFFFFFEF
BIC R1,R1,R2;ENDTX
CMP R1,#0
BEQ sendstrwait2
LDR R1,=send_bufffer
STR R1,[R0,#0x38];US_TPR
;ADDR OF TRANSMITTER POIONTER
STR R5,[R0,#0x3C];US_TCR
sendstrwait4 LDR R1,[R0,#0x14];US_CSR
LDR R2,=0xFFFFFFEF
BIC R1,R1,R2;ENDTX
CMP R1,#0
BEQ sendstrwait4
LDMFD sp!,{R0-R2,PC};Return
getbyte STMFD sp!,{R0-R2,lr}
;R5 low 8-bit
LDR R0,=USART0
getbytewait LDR R1,[R0,#0x14];US_CSR
LDR R2,=0xFFFFFFFE
BIC R1,R1,R2;RXRDY
CMP R1,#1
BNE getbytewait
LDR R5,[R0,#0x18];US_RHR
LDMFD sp!,{R0-R2,PC};Return
getstring
STMFD sp!,{R0-R2,lr}
;R5:COUNT OF RECEIVER,LOW 16-BIT
;SET R5,BEFORE CALL
LDR R0,=USART0
LDR R1,=receive_bufffer
STR R1,[R0,#0x30];US_RPR
;ADDR OF RECEIVER POIONTER
STR R5,[R0,#0x34];US_RCR
getstrwait2 LDR R1,[R0,#0x14];US_CSR
LDR R2,=0xFFFFFFF7
BIC R1,R1,R2;ENDRX
CMP R1,#0
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