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	 > 嵌入式系統(tǒng) > 設(shè)計應(yīng)用 > GNU ARM匯編--(九)s3c2440的PWM
          
    
          

          

          


	
	
	

          
	
          
		
          
			
          GNU ARM匯編--(九)s3c2440的PWM
          
						
          
				作者：
				時間：2016-11-26
				來源：網(wǎng)絡(luò)
				
				
				
				
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          1. /*
          2. copyleft@dndxhej@gmail.com
          3. */
          5. .equNOINT,0xc0
          7. .equGPBCON,0x56000010@led
          8. .equGPBDAT,0x56000014@led
          9. .equGPBUP,0x56000018@led
          10. .equGPFCON,0x56000050@interruptconfig
          11. .equEINTMASK,0x560000a4
          12. .equEXTINT0,0x56000088
          13. .equEXTINT1,0x5600008c
          14. .equEXTINT2,0x56000090
          15. .equINTMSK,0x4A000008
          16. .equEINTPEND,0x560000a8
          18. .equSUBSRCPND,0x4a000018
          19. .equINTSUBMSK,0x4a00001c
          23. .equSRCPND,0X4A000000
          24. .equINTPND,0X4A000010
          27. .equGPHCON,0x56000070
          28. .equGPHDAT,0x56000074
          30. .equGPB5_out,(1<<(5*2))
          31. .equGPB6_out,(1<<(6*2))
          32. .equGPB7_out,(1<<(7*2))
          33. .equGPB8_out,(1<<(8*2))
          35. .equGPBVALUE,(GPB5_out|GPB6_out|GPB7_out|GPB8_out)
          37. .equLOCKTIME,0x4c000000
          38. .equMPLLCON,0x4c000004
          39. .equUPLLCON,0x4c000008
          40. .equM_MDIV,92
          41. .equM_PDIV,1
          42. .equM_SDIV,1
          43. .equU_MDIV,56
          44. .equU_PDIV,2
          45. .equU_SDIV,2
          47. .equCLKDIVN,0x4c000014
          48. .equDIVN_UPLL,0
          49. .equHDIVN,1
          50. .equPDIVN,1@FCLK:HCLK:PCLK=1:2:4
          53. .equWTCON,0x53000000
          54. .equPre_scaler,249
          55. .equwd_timer,1
          56. .equclock_select,00@316
          57. .equint_gen,1@開中斷
          58. .equreset_enable,0@關(guān)掉重啟信號
          60. .equWTDAT,0x53000004
          61. .equCount_reload,50000@定時器定為2SPCLK=100MPCLK/(Pre_scaler+1)/clock_select=100M/(249+1)/16=25k50000/25k=2s
          63. .equWTCNT,0x53000008
          64. .equCount,50000
          67. .equTCFG0,0x51000000
          68. .equPrescaler1,0x00@[15:8]Timer234
          69. .equPrescaler0,249@[7:0]Timer01
          71. .equTCFG1,0x51000004
          72. .equDMA_MODE,0x0@[23:20]nodmachannal
          73. .equMUX0,0x2@[3:0]1/8
          74. @定時器輸入時鐘周期=PCLK/(prescaler+1)/(dividervalue)
          75. @clk=100M/(249+1)/8=25k
          77. .equTCON,0x51000008
          78. .equDZ_eable,0@[4]關(guān)閉死區(qū)的操作
          79. .equauto_reload,1@[3]auto_reload
          80. .equinverter,1@[2]打開電平反轉(zhuǎn)
          81. .equman_update,1@[1]手動更新
          82. .equclear_man_update,0
          83. .equstart,1@[0]開始
          84. .equstop,0@[0]停止
          86. .equTCNTB0,0x5100000c
          87. .equTCMPB0,0x51000010
          89. .equTCNTO0,0x51000014
          92. .equULCON0,0x50000000
          93. .equIR_MODE,0x0@[6]正常模式
          94. .equParity_Mode,0x0@[5:3]無校驗位
          95. .equNum_of_stop_bit,0x0@[2]一個停止位
          96. .equWord_length,0b11@[1:0]8個數(shù)據(jù)位
          98. .equUCON0,0x50000004
          99. .equFCLK_Div,0@[15:12]時鐘源選擇用PCLK,所以這里用默認(rèn)值
          100. .equClk_select,0b00@[11:10]時鐘源選擇使用PCLK
          101. .equTx_Int_Type,1@[9]中斷請求類型為Level
          102. .equRx_Int_Type,0@1@[8]中斷請求類型為Level
          103. .equRx_Timeout,0@[7]
          104. .equRx_Error_Stat_Int,1@[6]
          105. .equLoopback_Mode,0@[5]正常模式
          106. .equBreak_Sig,0@[4]不發(fā)送終止信號
          107. .equTx_Mode,0b01@[3:2]中斷請求或輪循模式
          108. .equRx_Mode,0b01@[1:0]中斷請求或輪循模式
          110. .equUFCON0,0x50000008
          111. .equTx_FIFO_Trig_Level,0b00@[7:6]
          112. .equRx_FIFO_Trig_Level,0b00@[5:4]
          113. .equTx_FIFO_Reset,0b0@[2]
          114. .equRx_FIFO_Reset,0b0@[1]
          115. .equFIFO_Enable,0b0@[0]非FIFO模式
          117. .equUMCON0,0x5000000C@這個寄存器可以不管的
          118. .equUTRSTAT0,0x50000010
          119. .equUERSTAT0,0x50000014
          120. .equUFSTAT0,0x50000018
          121. .equUMSTAT0,0x5000001C
          122. .equUTXH0,0x50000020@(L小端)
          123. .equURXH0,0x50000024@(L小端)
          125. .equUBRDIV0,0x50000028
          126. .equUBRDIV,0x35@PCLK=400M/4=100MUBRDIV=(int)(100M/115200/16)-1=53=0x35
          128. .globalBuzzer_Freq_Set
          130. .global_start
          131. _start:breset
          132. ldrpc,_undefined_instruction
          133. ldrpc,_software_interrupt
          134. ldrpc,_prefetch_abort
          135. ldrpc,_data_abort
          136. ldrpc,_not_used
          137. @birq
          138. ldrpc,_irq
          139. ldrpc,_fiq
          143. _undefined_instruction:.wordundefined_instruction
          144. _software_interrupt:.wordsoftware_interrupt
          145. _prefetch_abort:.wordprefetch_abort
          146. _data_abort:.worddata_abort
          147. _not_used:.wordnot_used
          148. _irq:.wordirq
          149. _fiq:.wordfiq
          151. .balignl16,0xdeadbeef
          153. reset:
          156. ldrr3,=WTCON
          157. movr4,#0x0
          158. strr4,[r3]@disablewatchdog
          160. ldrr0,=GPBCON
          161. ldrr1,=0x15400@這個時候暫不配置GPB0為TOUT0，這時候只是配置GPB0為TOUT0
          162. strr1,[r0]
          164. ldrr2,=GPBDAT
          165. ldrr1,=0x160
          166. strr1,[r2]
          168. blclock_setup
          169. bluart_init
          170. //bldelay
          173. msrcpsr_c,#0xd2@進(jìn)入中斷模式
          174. ldrsp,=3072@中斷模式的棧指針定義
          176. msrcpsr_c,#0xd3@進(jìn)入系統(tǒng)模式
          177. ldrsp,=4096@設(shè)置系統(tǒng)模式的棧指針
          179. @--------------------------------------------
          181. ldrr0,=GPBUP
          182. ldrr1,=0x03f0
          183. strr1,[r0]
          185. ldrr0,=GPFCON
          186. ldrr1,=0x2ea@0x2
          187. strr1,[r0]
          189. ldrr0,=EXTINT0
          190. @ldrr1,=0x8f888@0x0@0x8f888@~(7|(7<<4)|(7<<8)|(7<<16))//低電平觸發(fā)中斷
          191. ldrr1,=0xafaaa@0x0@0x8f888//下降沿觸發(fā)中斷
          192. strr1,[r0]
          194. ldrr0,=EINTPEND
          195. ldrr1,=0xf0@0b10000
          196. strr1,[r0]
          198. ldrr0,=EINTMASK
          199. ldrr1,=0x00@0b00000
          200. strr1,[r0]
          204. ldrr0,=SRCPND
          205. ldrr1,=0x3ff@0x1@0b11111
          206. strr1,[r0]
          208. ldrr0,=SUBSRCPND
          209. ldrr1,=0x1<<13
          210. strr1,[r0]
          212. ldrr0,=INTPND
          213. ldrr1,=0x3ff@0x1@0b11111
          214. strr1,[r0]
          216. ldrr0,=INTSUBMSK
          217. ldrr1,=0x0<<13
          218. strr1,[r0]
          220. ldrr0,=INTMSK
          221. ldrr1,=0xfffff000@0b00000
          222. strr1,[r0]
          224. MRSr1,cpsr
          225. BICr1,r1,#0x80
          226. MSRcpsr_c,r1
          229. blmain
          231. irq:
          232. sublr,lr,#4
          233. stmfdsp!,{r0-r12,lr}
          236. blirq_isr
          237. ldmfdsp!,{r0-r12,pc}^
          240. irq_isr:
          242. ldrr2,=GPBDAT
          243. ldrr1,=0x0e0
          244. strr1,[r2]
          247. ldrr0,=EINTPEND
          248. ldrr1,=0xf0
          249. strr1,[r0]
          251. ldrr0,=SRCPND
          252. ldrr1,=0x3ff@0b11111
          253. strr1,[r0]
          255. ldrr0,=SUBSRCPND
          256. ldrr1,=0x3ff@0x1<<13
          257. strr1,[r0]
          259. ldrr0,=INTPND
          260. ldrr1,=0x3ff@0b11111
          261. strr1,[r0]
          263. movpc,lr
          266. delay:
          268. ldrr3,=0xffffff
          270. delay1:
          271. subr3,r3,#1
          273. cmpr3,#0x0
          275. bnedelay1
          277. movpc,lr
          280. clock_setup:
          282. ldrr0,=LOCKTIME
          283. ldrr1,=0xffffffff
          284. strr1,[r0]
          286. ldrr0,=CLKDIVN
          287. ldrr1,=(DIVN_UPLL<<3)|(HDIVN<<1)|(PDIVN<<0)
          288. strr1,[r0]
          290. ldrr0,=UPLLCON
          291. ldrr1,=(U_MDIV<<12)|(U_PDIV<<4)|(U_SDIV<<0)@Fin=12MUPLL=48M
          292. strr1,[r0]
          293. nop
          294. nop
          295. nop
          296. nop
          297. nop
          298. nop
          299. nop
          300. ldrr0,=MPLLCON
          301. ldrr1,=(M_MDIV<<12)|(M_PDIV<<4)|(M_SDIV<<0)@Fin=12MFCLK=400M
          302. strr1,[r0]
          306. movpc,lr
          309. uart_init:
          310. ldrr0,=GPHCON
          311. ldrr1,=0x2aaaa@配置GPIO復(fù)用規(guī)則為串口
          312. strr1,[r0]
          314. ldrr0,=ULCON0
          315. ldrr1,=(IR_MODE<<6)|(Parity_Mode<<3)|(Num_of_stop_bit<<2)|(Word_length<<0)@
          316. strr1,[r0]
          318. ldrr0,=UCON0
          319. 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)
          320. strr1,[r0]
          322. ldrr0,=UFCON0
          323. ldrr1,=(Tx_FIFO_Trig_Level<<6)|(Rx_FIFO_Trig_Level<<4)|(Tx_FIFO_Reset<<2)|(Rx_FIFO_Reset<<1)|(FIFO_Enable<<0)@
          324. strr1,[r0]
          326. ldrr0,=UBRDIV0
          327. ldrr1,=(UBRDIV<<0)
          328. strr1,[r0]
          330. movpc,lr
          332. Buzzer_Freq_Set:
          334. //ldrr0,=GPBCON
          335. //ldrr1,=0x15400@這個時候暫不配置GPB0為TOUT0，這時候只是配置GPB0為TOUT0
          336. //strr1,[r0]
          338. ldrr2,=GPBDAT
          339. ldrr1,=0x1c1
          340. strr1,[r2]
          342. ldrr2,=GPBCON
          343. ldrr1,[r2]
          344. ldrr1,[r1]
          345. //ldrr1,=0x15400
          346. bicr1,r1,#0x3
          347. orrr1,r1,#0x2
          348. strr1,[r2]
          350. ldrr2,=GPBDAT
          351. ldrr1,=0x1a0
          352. strr1,[r2]
          354. ldrr1,=TCFG0
          355. ldrr2,=(Prescaler0<<0)
          356. strr2,[r1]
          358. ldrr1,=TCFG1
          359. ldrr2,=(DMA_MODE<<20)|(MUX0<<0)
          360. strr2,[r1]
          362. //ldrr3,[r0]
          363. //strr3,[r2]
          365. 				   
				
            
                
			
							
            
                
			            
                            
              
            
          
		
          
		
          
		
          
		
          
		
          
			
            
				
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            			            ARM匯編s3c2440PW
                        
            
          
            
			
          
		
          	
		

	

          
	
	
          
		
          
			
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