DSP

DSP6713 CE1#不拉低

2019-07-15 19:43发布

站内问答 / DSP
15325 1 1779
在家，我用的是DSP6713，在CE1空间接了一个Flash：AM29LV160D，但不知道为什么不论擦除，还是读写，CE1#片选信号都不拉低，请问哪些原因会导致这个问题？
下面是我的程序：主程序：
  1. Flash_StartAdd = 0x90000000;

  3. flash_chip_erase();
  4. printf("Finish flash erase!! ");// Write flash memory.
  5. for(i=0;i<0x400;i++)
  6. {
  7. data = i;//fmod(i,0x10000);
  8. addr = (Flash_StartAdd+2*i);
  9. Write_Flash_Word(&data,&addr);
  10. }
  11. printf("Write flash ok. ");// Read flash memory.
  12. for(i=0;i<0x400;i++)
  13. {
  14. addr = Flash_StartAdd+2*i;
  15. Read_Flash_Word(&data,&addr);
  16. if(data != fmod(i,0x10000))
  17. {
  18. printf(" Testing is Failure! ");
  19. printf("Address 0x%x is error! Data is 0x%x ",i,data);
  20. exit(0);
  21. }
  22. }
  23. printf("Opereation is success. ");
  24. #define FLASH_ADR1 (0x90000000+0x555<<1)
  25. #define FLASH_ADR2 (0x90000000+0x2AA<<1)
  26. #define Sourceaddr 0x90000000
  27. #define Toggle_Bit 0x80 //0x40 /* d6 = 1 */
  28. #define Hangup_Bit 0x20 /* d5 = 1 */
  29. #define Pass_Flag 0
  30. #define Fail_Flag 1
  31. void flash_chip_erase()
  32. {
  33. *(volatile Uint16*)FLASH_ADR1=0x012a;//0xaa;
  34. *(volatile Uint16*)FLASH_ADR2=0x0095;//0x55;
  35. *(volatile Uint16*)FLASH_ADR1=0x0100;//0x80;
  36. *(volatile Uint16*)FLASH_ADR1=0x012a;//0xaa;
  37. *(volatile Uint16*)FLASH_ADR2=0x0095;//0x55;
  38. *(volatile Uint16*)FLASH_ADR1=0x0010;//0x10;
  39. }
  40. int Toggle_Bit_Check(Uint16 *addr)
  41. {
  42. Uint16 toggle_data,read_data;
  43. toggle_data = *addr&Toggle_Bit;
  44. do{
  45. if(((read_data = *addr) &Toggle_Bit) == toggle_data)
  46. break;
  47. toggle_data = read_data & Toggle_Bit;
  48. }while((read_data&Hangup_Bit) != Hangup_Bit);
  49. toggle_data = *addr & Toggle_Bit;
  50. if(((read_data = *addr)&Toggle_Bit) != toggle_data)
  51. return (Fail_Flag);
  52. return (Pass_Flag);
  53. }

  55. int Write_Flash_Word(Uint16 *data,Uint16 *address)
  56. {
  57. *(volatile Uint16 *)FLASH_ADR1=0x012a;//0xaa;
  58. *(volatile Uint16 *)FLASH_ADR2=0x0095;//0x55;
  59. *(volatile Uint16 *)FLASH_ADR1=0x0120;//0xa0;
  60. *address=*data;
  61. return(Toggle_Bit_Check(address));
  62. }
  63. int Read_Flash_Word(Uint16 *data,Uint16 *address)
  64. {
  65. *(volatile Uint16 *)FLASH_ADR1=0x012a;//0xaa;
  66. *(volatile Uint16 *)FLASH_ADR2=0x0095;//0x55;
  67. *(volatile Uint16 *)FLASH_ADR1=0x01b0;//0xf0;
  68. *data=*address;
  69. return(Toggle_Bit_Check(address));
  70. }
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1条回答
sundonga
2019-07-15 21:09
这个是因为地址计算错误，没有写到0x90000000CE1空间去……

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