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GNU ARM匯編--(九)s3c2440的PWM

作者：時間：2016-11-26 來源：網絡

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/*
copyleft@dndxhej@gmail.com
*/
.equNOINT,0xc0
.equGPBCON,0x56000010@led
.equGPBDAT,0x56000014@led
.equGPBUP,0x56000018@led
.equGPFCON,0x56000050@interruptconfig
.equEINTMASK,0x560000a4
.equEXTINT0,0x56000088
.equEXTINT1,0x5600008c
.equEXTINT2,0x56000090
.equINTMSK,0x4A000008
.equEINTPEND,0x560000a8
.equSUBSRCPND,0x4a000018
.equINTSUBMSK,0x4a00001c
.equSRCPND,0X4A000000
.equINTPND,0X4A000010
.equGPHCON,0x56000070
.equGPHDAT,0x56000074
.equGPB5_out,(1<<(5*2))
.equGPB6_out,(1<<(6*2))
.equGPB7_out,(1<<(7*2))
.equGPB8_out,(1<<(8*2))
.equGPBVALUE,(GPB5_out|GPB6_out|GPB7_out|GPB8_out)
.equLOCKTIME,0x4c000000
.equMPLLCON,0x4c000004
.equUPLLCON,0x4c000008
.equM_MDIV,92
.equM_PDIV,1
.equM_SDIV,1
.equU_MDIV,56
.equU_PDIV,2
.equU_SDIV,2
.equCLKDIVN,0x4c000014
.equDIVN_UPLL,0
.equHDIVN,1
.equPDIVN,1@FCLK:HCLK:PCLK=1:2:4
.equWTCON,0x53000000
.equPre_scaler,249
.equwd_timer,1
.equclock_select,00@316
.equint_gen,1@開中斷
.equreset_enable,0@關掉重啟信號
.equWTDAT,0x53000004
.equCount_reload,50000@定時器定為2SPCLK=100MPCLK/(Pre_scaler+1)/clock_select=100M/(249+1)/16=25k50000/25k=2s
.equWTCNT,0x53000008
.equCount,50000
.equTCFG0,0x51000000
.equPrescaler1,0x00@[15:8]Timer234
.equPrescaler0,249@[7:0]Timer01
.equTCFG1,0x51000004
.equDMA_MODE,0x0@[23:20]nodmachannal
.equMUX0,0x2@[3:0]1/8
@定時器輸入時鐘周期=PCLK/(prescaler+1)/(dividervalue)
@clk=100M/(249+1)/8=25k
.equTCON,0x51000008
.equDZ_eable,0@[4]關閉死區的操作
.equauto_reload,1@[3]auto_reload
.equinverter,1@[2]打開電平反轉
.equman_update,1@[1]手動更新
.equclear_man_update,0
.equstart,1@[0]開始
.equstop,0@[0]停止
.equTCNTB0,0x5100000c
.equTCMPB0,0x51000010
.equTCNTO0,0x51000014
.equULCON0,0x50000000
.equIR_MODE,0x0@[6]正常模式
.equParity_Mode,0x0@[5:3]無校驗位
.equNum_of_stop_bit,0x0@[2]一個停止位
.equWord_length,0b11@[1:0]8個數據位
.equUCON0,0x50000004
.equFCLK_Div,0@[15:12]時鐘源選擇用PCLK,所以這里用默認值
.equClk_select,0b00@[11:10]時鐘源選擇使用PCLK
.equTx_Int_Type,1@[9]中斷請求類型為Level
.equRx_Int_Type,0@1@[8]中斷請求類型為Level
.equRx_Timeout,0@[7]
.equRx_Error_Stat_Int,1@[6]
.equLoopback_Mode,0@[5]正常模式
.equBreak_Sig,0@[4]不發送終止信號
.equTx_Mode,0b01@[3:2]中斷請求或輪循模式
.equRx_Mode,0b01@[1:0]中斷請求或輪循模式
.equUFCON0,0x50000008
.equTx_FIFO_Trig_Level,0b00@[7:6]
.equRx_FIFO_Trig_Level,0b00@[5:4]
.equTx_FIFO_Reset,0b0@[2]
.equRx_FIFO_Reset,0b0@[1]
.equFIFO_Enable,0b0@[0]非FIFO模式
.equUMCON0,0x5000000C@這個寄存器可以不管的
.equUTRSTAT0,0x50000010
.equUERSTAT0,0x50000014
.equUFSTAT0,0x50000018
.equUMSTAT0,0x5000001C
.equUTXH0,0x50000020@(L小端)
.equURXH0,0x50000024@(L小端)
.equUBRDIV0,0x50000028
.equUBRDIV,0x35@PCLK=400M/4=100MUBRDIV=(int)(100M/115200/16)-1=53=0x35
.globalBuzzer_Freq_Set
.global_start
_start:breset
ldrpc,_undefined_instruction
ldrpc,_software_interrupt
ldrpc,_prefetch_abort
ldrpc,_data_abort
ldrpc,_not_used
@birq
ldrpc,_irq
ldrpc,_fiq
_undefined_instruction:.wordundefined_instruction
_software_interrupt:.wordsoftware_interrupt
_prefetch_abort:.wordprefetch_abort
_data_abort:.worddata_abort
_not_used:.wordnot_used
_irq:.wordirq
_fiq:.wordfiq
.balignl16,0xdeadbeef
reset:
ldrr3,=WTCON
movr4,#0x0
strr4,[r3]@disablewatchdog
ldrr0,=GPBCON
ldrr1,=0x15400@這個時候暫不配置GPB0為TOUT0，這時候只是配置GPB0為TOUT0
strr1,[r0]
ldrr2,=GPBDAT
ldrr1,=0x160
strr1,[r2]
blclock_setup
bluart_init
//bldelay
msrcpsr_c,#0xd2@進入中斷模式
ldrsp,=3072@中斷模式的棧指針定義
msrcpsr_c,#0xd3@進入系統模式
ldrsp,=4096@設置系統模式的棧指針
@--------------------------------------------
ldrr0,=GPBUP
ldrr1,=0x03f0
strr1,[r0]
ldrr0,=GPFCON
ldrr1,=0x2ea@0x2
strr1,[r0]
ldrr0,=EXTINT0
@ldrr1,=0x8f888@0x0@0x8f888@~(7|(7<<4)|(7<<8)|(7<<16))//低電平觸發中斷
ldrr1,=0xafaaa@0x0@0x8f888//下降沿觸發中斷
strr1,[r0]
ldrr0,=EINTPEND
ldrr1,=0xf0@0b10000
strr1,[r0]
ldrr0,=EINTMASK
ldrr1,=0x00@0b00000
strr1,[r0]
ldrr0,=SRCPND
ldrr1,=0x3ff@0x1@0b11111
strr1,[r0]
ldrr0,=SUBSRCPND
ldrr1,=0x1<<13
strr1,[r0]
ldrr0,=INTPND
ldrr1,=0x3ff@0x1@0b11111
strr1,[r0]
ldrr0,=INTSUBMSK
ldrr1,=0x0<<13
strr1,[r0]
ldrr0,=INTMSK
ldrr1,=0xfffff000@0b00000
strr1,[r0]
MRSr1,cpsr
BICr1,r1,#0x80
MSRcpsr_c,r1
blmain
irq:
sublr,lr,#4
stmfdsp!,{r0-r12,lr}
blirq_isr
ldmfdsp!,{r0-r12,pc}^
irq_isr:
ldrr2,=GPBDAT
ldrr1,=0x0e0
strr1,[r2]
ldrr0,=EINTPEND
ldrr1,=0xf0
strr1,[r0]
ldrr0,=SRCPND
ldrr1,=0x3ff@0b11111
strr1,[r0]
ldrr0,=SUBSRCPND
ldrr1,=0x3ff@0x1<<13
strr1,[r0]
ldrr0,=INTPND
ldrr1,=0x3ff@0b11111
strr1,[r0]
movpc,lr
delay:
ldrr3,=0xffffff
delay1:
subr3,r3,#1
cmpr3,#0x0
bnedelay1
movpc,lr
clock_setup:
ldrr0,=LOCKTIME
ldrr1,=0xffffffff
strr1,[r0]
ldrr0,=CLKDIVN
ldrr1,=(DIVN_UPLL<<3)|(HDIVN<<1)|(PDIVN<<0)
strr1,[r0]
ldrr0,=UPLLCON
ldrr1,=(U_MDIV<<12)|(U_PDIV<<4)|(U_SDIV<<0)@Fin=12MUPLL=48M
strr1,[r0]
nop
nop
nop
nop
nop
nop
nop
ldrr0,=MPLLCON
ldrr1,=(M_MDIV<<12)|(M_PDIV<<4)|(M_SDIV<<0)@Fin=12MFCLK=400M
strr1,[r0]
movpc,lr
uart_init:
ldrr0,=GPHCON
ldrr1,=0x2aaaa@配置GPIO復用規則為串口
strr1,[r0]
ldrr0,=ULCON0
ldrr1,=(IR_MODE<<6)|(Parity_Mode<<3)|(Num_of_stop_bit<<2)|(Word_length<<0)@
strr1,[r0]
ldrr0,=UCON0
ldrr1,=(FCLK_Div<<12)|(Clk_select<<10)|(Tx_Int_Type<<9)|(Rx_Int_Type<<8)|(Rx_Timeout<<7)|(Rx_Error_Stat_Int<<6)|(Loopback_Mode<<5)|(Break_Sig<<4)|(Tx_Mode<<2)|(Rx_Mode<<0)
strr1,[r0]
ldrr0,=UFCON0
ldrr1,=(Tx_FIFO_Trig_Level<<6)|(Rx_FIFO_Trig_Level<<4)|(Tx_FIFO_Reset<<2)|(Rx_FIFO_Reset<<1)|(FIFO_Enable<<0)@
strr1,[r0]
ldrr0,=UBRDIV0
ldrr1,=(UBRDIV<<0)
strr1,[r0]
movpc,lr
Buzzer_Freq_Set:
//ldrr0,=GPBCON
//ldrr1,=0x15400@這個時候暫不配置GPB0為TOUT0，這時候只是配置GPB0為TOUT0
//strr1,[r0]
ldrr2,=GPBDAT
ldrr1,=0x1c1
strr1,[r2]
ldrr2,=GPBCON
ldrr1,[r2]
ldrr1,[r1]
//ldrr1,=0x15400
bicr1,r1,#0x3
orrr1,r1,#0x2
strr1,[r2]
ldrr2,=GPBDAT
ldrr1,=0x1a0
strr1,[r2]
ldrr1,=TCFG0
ldrr2,=(Prescaler0<<0)
strr2,[r1]
ldrr1,=TCFG1
ldrr2,=(DMA_MODE<<20)|(MUX0<<0)
strr2,[r1]
//ldrr3,[r0]
//strr3,[r2]
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