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	 > 嵌入式系統(tǒng) > 設計應用 > GNU ARM匯編--(十)s3c2440的RTC
          
    
          

          

          


	
	
	

          
	
          
		
          
			
          GNU ARM匯編--(十)s3c2440的RTC
          
						
          
				作者：
				時間：2016-11-26
				來源：網(wǎng)絡
				
				
				
				
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        2. ldrr0,=TCFG0
        3. ldrr1,=(Prescaler0<<0)
        4. strr1,[r0]
        6. ldrr0,=TCFG1
        7. ldrr1,=(DMA_MODE<<20)|(MUX0<<0)
        8. strr1,[r0]
        11. ldrr0,=TCNTB0
        12. ldrr1,=10
        13. strr1,[r0]
        15. ldrr0,=TCMPB0
        16. ldrr1,=2
        17. strr1,[r0]
        21. ldrr0,=TCON
        22. ldrr1,=(DZ_eable<<4)|(auto_reload<<3)|(inverter<<2)|(man_update<<1)|(start<<0)
        23. strr1,[r0]
        25. ldrr0,=TCON
        26. ldrr1,=(DZ_eable<<4)|(auto_reload<<3)|(inverter<<2)|(clear_man_update<<1)|(start<<0)
        27. strr1,[r0]
        29. */
        37. ldrlr,=loop
        38. //ldrpc,_rtc_uart_test
        39. //_rtc_uart_test:.wordrtc_uart_test
        40. blrtc_uart_test
        42. ldrr2,=GPBDAT
        43. ldrr1,=0x1c0
        44. strr1,[r2]
        45. bldelay
        46. loop:
        47. ldrr2,=BCDSEC@BCDMIN
        48. ldrr1,[r2]
        49. cmpr1,#0x06
        50. bleqledon
        53. bloop@死循環(huán)
        55. ledon:
        56. ldrr2,=GPBDAT
        57. ldrr1,=0x160
        58. strr1,[r2]
        60. ldrr3,=0xffffff
        62. delay3:
        63. subr3,r3,#1
        65. cmpr3,#0x0
        67. bnedelay3
        68. movpc,lr
        72. undefined_instruction:
        73. nop
        74. software_interrupt:
        75. nop
        76. prefetch_abort:
        77. nop
        78. data_abort:
        79. nop
        80. not_used:
        81. nop
        82. fiq:
        83. nop

          84. rtc_uart_test.s:
          本文引用地址：http://www.ex-cimer.com/article/201611/321721.htm
          [cpp]view plaincopy
          1. #include
          2. #include
          3. #include
          4. #include
          5. #include
          7. #include"rtc_uart_test.h"
          8. externvoidBuzzer_Freq_Set(intfreq);
          9. //externvoidBuzzer_Freq_Set(void);
          10. charuart_GetByte(void)
          11. {
          12. while(!(rUTRSTAT0&0x1));//WaituntilTHRisempty.
          13. returnRdURXH0();
          14. }
          17. voiduart_GetString(char*pt)
          18. {
          19. while(*pt)
          20. uart_GetByte();
          21. }
          24. voiduart_SendByte(intdata)
          25. {
          27. if(data==)
          28. {
          29. while(!(rUTRSTAT0&0x2));
          30. WrUTXH0();
          31. }
          32. while(!(rUTRSTAT0&0x2));//WaituntilTHRisempty.
          33. WrUTXH0(data);
          35. }
          37. //====================================================================
          38. voiduart_SendString(char*pt)
          39. {
          40. while(*pt)
          41. uart_SendByte(*pt++);
          42. }
          44. voiduart_Printf(char*fmt,...)
          45. {
          46. va_listap;
          47. charstring[256];
          49. va_start(ap,fmt);
          50. //vsprintf(string,fmt,ap);
          51. uart_SendString(string);
          52. va_end(ap);
          53. }
          55. voiduart_test(void)
          56. {
          58. charstr[20]="helloworld";
          59. inta=97;
          60. //while(1)
          61. //uart_SendByte(a);
          62. uart_SendString(str);
          63. chars=uart_GetByte();
          64. //if(s==a)
          65. if(s==97)
          66. rGPBDAT=0x1c0;
          67. //uart_SendByte(a);
          68. //uart_SendByte(97);
          69. //uart_SendByte(a);
          70. uart_SendByte((int)s);
          71. uart_SendByte((int)s);
          72. }
          75. voidrtc_uart_test(void)
          76. {
          77. rRTCCON=0x1;
          78. rTICNT=0x0;
          79. rRTCALM=0x42;
          83. rBCDYEAR=0x10;
          84. rBCDMON=0x11;
          85. rBCDDATE=0x07;
          86. rBCDDAY=0x05;
          87. rBCDHOUR=0x12;
          88. rBCDMIN=0x03;
          89. rBCDSEC=0x00;
          91. rALMMIN=0x04;
          92. uart_SendString("begin");
          93. //uart_Printf("year:%d",rBCDYEAR);
          94. }
          97. voidpwm_uart_test(void)
          98. {
          99. intfreq=10;
          100. inti;
          101. for(i=0;i<100;i++)
          102. uart_SendString("app");
          103. //Buzzer_Freq_Set(freq);
          104. //Buzzer_Freq_Set();
          105. //uart_test();
          106. uart_SendString("start");
          107. /*
          108. inti;
          109. for(i=0;i<1000;i++)
          110. uart_SendString("wait");
          111. while(1)
          112. {
          113. charkey=uart_GetByte();
          114. uart_SendByte(key);
          115. if(key==a||key==A)
          116. {
          117. if(freq<2000)//lci20000
          118. freq+=10;
          119. uart_SendByte(a);
          120. Buzzer_Freq_Set(freq);
          121. }
          123. if(key==b||key==B)
          124. {
          125. if(freq>11)
          126. freq-=10;
          127. uart_SendByte(b);
          128. Buzzer_Freq_Set(freq);
          129. }
          131. //uart_SendString("	Freq=%d",freq);
          132. //if(key==ESC_KEY)
          133. //{
          134. //Buzzer_Stop();
          135. //return;
          136. //}
          138. }
          140. */
          141. }

          在調(diào)這個過程中,因為RTCCON中的CLKRST最初被我置為1,導致時間根本不走,為了查這個問題,專門通過led顯示來判斷這個時間是不是不走:
          ldr r2, =BCDSEC  @BCDMIN
          ldr r1,[r2]
          cmp   r1, #0x06
           bleq   ledon
          通過這里的判斷,可以明確時間有被設進去,可是時間不走.經(jīng)過google,才確定是寄存器的設置問題.
          到此,rtc的鬧鐘也實現(xiàn)了功能.明天就用這個做鬧鐘吧～～
          
				
            
                
			
							
          
                
			            
          
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