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GNU ARM汇编--(九)s3c2440的PWM

时间：11-26 来源：互联网 点击：

  1. 90
  2. .equINTMSK,0x4A000008
  3. .equEINTPEND,0x560000a8
  5. .equSUBSRCPND,0x4a000018
  6. .equINTSUBMSK,0x4a00001c
  10. .equSRCPND,0X4A000000
  11. .equINTPND,0X4A000010
  14. .equGPHCON,0x56000070
  15. .equGPHDAT,0x56000074
  17. .equGPB5_out,(1<(5*2))
  18. .equGPB6_out,(1<(6*2))
  19. .equGPB7_out,(1<(7*2))
  20. .equGPB8_out,(1<(8*2))
  22. .equGPBVALUE,(GPB5_out|GPB6_out|GPB7_out|GPB8_out)
  24. .equLOCKTIME,0x4c000000
  25. .equMPLLCON,0x4c000004
  26. .equUPLLCON,0x4c000008
  27. .equM_Mdiv,92
  28. .equM_Pdiv,1
  29. .equM_Sdiv,1
  30. .equU_Mdiv,56
  31. .equU_Pdiv,2
  32. .equU_Sdiv,2
  34. .equCLKdivN,0x4c000014
  35. .equdivN_UPLL,0
  36. .equHdivN,1
  37. .equPdivN,1@FCLK:HCLK:PCLK=1:2:4
  40. .equWTCON,0x53000000
  41. .equPre_scaler,249
  42. .equwd_timer,1
  43. .equclock_select,00@316
  44. .equint_gen,1@开中断
  45. .equreset_enable,0@关掉重启信号
  47. .equWTDAT,0x53000004
  48. .equCount_reload,50000@定时器定为2SPCLK=100MPCLK/(Pre_scaler+1)/clock_select=100M/(249+1)/16=25k50000/25k=2s
  50. .equWTCNT,0x53000008
  51. .equCount,50000
  54. .equTCFG0,0x51000000
  55. .equPrescaler1,0x00@[15:8]Timer234
  56. .equPrescaler0,249@[7:0]Timer01
  58. .equTCFG1,0x51000004
  59. .equDMA_MODE,0x0@[23:20]nodmachannal
  60. .equMUX0,0x2@[3:0]1/8
  61. @定时器输入时钟周期=PCLK/(prescaler+1)/(dividervalue)
  62. @clk=100M/(249+1)/8=25k
  64. .equTCON,0x51000008
  65. .equDZ_eable,0@[4]关闭死区的操作
  66. .equauto_reload,1@[3]auto_reload
  67. .equinverter,1@[2]打开电平反转
  68. .equman_update,1@[1]手动更新
  69. .equclear_man_update,0
  70. .equstart,1@[0]开始
  71. .equstop,0@[0]停止
  73. .equTCNTB0,0x5100000c
  74. .equTCMPB0,0x51000010
  76. .equTCNTO0,0x51000014
  79. .equULCON0,0x50000000
  80. .equIR_MODE,0x0@[6]正常模式
  81. .equParity_Mode,0x0@[5:3]无校验位
  82. .equNum_of_stop_bit,0x0@[2]一个停止位
  83. .equWord_length,0b11@[1:0]8个数据位
  85. .equUCON0,0x50000004
  86. .equFCLK_Div,0@[15:12]时钟源选择用PCLK,所以这里用默认值
  87. .equClk_select,0b00@[11:10]时钟源选择使用PCLK
  88. .equTx_Int_Type,1@[9]中断请求类型为Level
  89. .equRx_Int_Type,0@1@[8]中断请求类型为Level
  90. .equRx_Timeout,0@[7]
  91. .equRx_Error_Stat_Int,1@[6]
  92. .equLoopback_Mode,0@[5]正常模式
  93. .equBreak_Sig,0@[4]不发送终止信号
  94. .equTx_Mode,0b01@[3:2]中断请求或轮循模式
  95. .equRx_Mode,0b01@[1:0]中断请求或轮循模式
  97. .equUFCON0,0x50000008
  98. .equTx_FIFO_Trig_Level,0b00@[7:6]
  99. .equRx_FIFO_Trig_Level,0b00@[5:4]
  100. .equTx_FIFO_Reset,0b0@[2]
  101. .equRx_FIFO_Reset,0b0@[1]
  102. .equFIFO_Enable,0b0@[0]非FIFO模式
  104. .equUMCON0,0x5000000C@这个寄存器可以不管的
  105. .equUTRSTAT0,0x50000010
  106. .equUERSTAT0,0x50000014
  107. .equUFSTAT0,0x50000018
  108. .equUMSTAT0,0x5000001C
  109. .equUTXH0,0x50000020@(L小端)
  110. .equURXH0,0x50000024@(L小端)
  112. .equUBRdiv0,0x50000028
  113. .equUBRdiv,0x35@PCLK=400M/4=100MUBRdiv=(int)(100M/115200/16)-1=53=0x35
  115. .globalBuzzer_Freq_Set
  117. .global_start
  118. _start:breset
  119. ldrpc,_undefined_instruction
  120. ldrpc,_software_interrupt
  121. ldrpc,_prefetch_abort
  122. ldrpc,_data_abort
  123. ldrpc,_not_used
  124. @birq
  125. ldrpc,_irq
  126. ldrpc,_fiq
  130. _undefined_instruction:.wordundefined_instruction
  131. _software_interrupt:.wordsoftware_interrupt
  132. _prefetch_abort:.wordprefetch_abort
  133. _data_abort:.worddata_abort
  134. _not_used:.wordnot_used
  135. _irq:.wordirq
  136. _fiq:.wordfiq
  138. .balignl16,0xdeadbeef
  140. reset:
  143. ldrr3,=WTCON
  144. movr4,#0x0
  145. strr4,[r3]@disablewatchdog
  147. ldrr0,=GPBCON
  148. ldrr1,=0x15400@这个时候暂不配置GPB0为TOUT0，这时候只是配置GPB0为TOUT0
  149. strr1,[r0]
  151. ldrr2,=GPBDAT
  152. ldrr1,=0x160
  153. strr1,[r2]
  155. blclock_setup
  156. bluart_init
  157. //bldelay
  160. msrcpsr_c,#0xd2@进入中断模式
  161. ldrsp,=3072@中断模式的栈指针定义
  163. msrcpsr_c,#0xd3@进入系统模式
  164. ldrsp,=4096@设置系统模式的栈指针
  166. @--------------------------------------------
  168. ldrr0,=GPBUP
  169. ldrr1,=0x03f0
  170. strr1,[r0]
  172. ldrr0,=GPFCON
  173. ldrr1,=0x2ea@0x2
  174. strr1,[r0]
  176. ldrr0,=EXTINT0
  177. @ldrr1,=0x8f888@0x0@0x8f888@~(7|(7<4)|(7<8)|(7<16))//低电平触发中断
  178. ldrr1,=0xafaaa@0x0@0x8f888//下降沿触发中断
  179. strr1,[r0]
  181. ldrr0,=EINTPEND
  182. ldrr1,=0xf0@0b10000
  183. strr1,[r0]
  185. ldrr0,=EINTMASK
  186. ldrr1,=0x00@0b00000
  187. strr1,[r0]
  191. ldrr0,=SRCPND
  192. ldrr1,=0x3ff@0x1@0b11111
  193. strr1,[r0]
  195. ldrr0,=SUBSRCPND
  196. ldrr1,=0x1<13
  197. strr1,[r0]
  199. ldrr0,=INTPND
  200. ldrr1,=0x3ff@0x1@0b11111
  201. strr1,[r0]
  203. ldrr0,=INTSUBMSK
  204. ldrr1,=0x0<13
  205. strr1,[r0]
  207. ldrr0,=INTMSK
  208. ldrr1,=0xfffff000@0b00000
  209. strr1,[r0]
  211. MRSr1,cpsr
  212. BICr1,r1,#0x80
  213. MSRcpsr_c,r1
  216. blmain
  218. irq:

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