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GNU ARM匯編--(九)s3c2440的PWM

作者： 時間：2016-11-26 來源：網(wǎng)絡 收藏
  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@進入中斷模式
  174. ldrsp,=3072@中斷模式的棧指針定義
  176. msrcpsr_c,#0xd3@進入系統(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.

關(guān)鍵詞： ARM匯編s3c2440PW

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