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Re: PIC18F4550 如何透過USB將檔案傳輸至4550中的EEPROM
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中級會員
 
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Hi, 您好:
你要不要運用以下的EE Read/Write modules 加入你的user.c程式中, 然後透過buffer將EEPROM的data讀寫入PIC中. void EE_Write (unsigned char, unsigned char); unsigned char EE_Read (unsigned char); . . . void EE_Write (unsigned char EE_Address, unsigned char EE_Data) { PIR2bits.EEIF = 0; EEADR = EE_Address; EEDATA = EE_Data; EECON1bits.EEPGD = 0; EECON1bits.CFGS = 0; EECON1bits.WREN = 1; INTCONbits.GIE = 0; //disable all interrupts _asm MOVLW 0X55 //refer to page.86 of 18f4550 doc, cause it must be follow writen sequence.. MOVWF EECON2,0 MOVLW 0XAA MOVWF EECON2,0 BSF EECON1,1,0 //Set WR bit to begin write , refer page.93 _endasm INTCONbits.GIE = 1; //enable all interrupts while (!PIR2bits.EEIF); //waiting for eeprom write action all done! PIR2bits.EEIF = 0; //if done then clear EEIF flag , it means initial EECON1bits.WREN = 0; //disable eeprom write cycle.. } unsigned char EE_Read (unsigned char EE_Address) { EEADR = EE_Address; EECON1bits.EEPGD = 0; EECON1bits.CFGS = 0; EECON1bits.RD = 1; return EEDATA; }
發表於: 2008/4/23 18:13
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PIC18F4550 如何透過USB將檔案傳輸至4550中的EEPROM
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新會員
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小弟我是剛接觸PIC的新手，用BCB寫視窗介面，TRY了幾天後，有透過USB將LED顯示亮滅，但我想請問的是， 要如何做才能將檔案傳輸至CHIP內的EEPROM，之後再將檔案牘回來。
我在MCHPFSUSB\fw\Demo\user\user.h 增加了 READ_EEDATA = 0x04 WRITE_EEDATA = 0x05 並在MCHPFSUSB\fw\Demo\user\user.c 增加了 case WRITE_EEDATA : WriteEE(); //已經將WriteEE();寫在檔案前面了 但是在我的BCB界面上該怎麼做才能達成我要的功能呢? 或是我在過程中的想法與做法有錯誤，還請各位給我點意見，謝謝
發表於: 2008/3/9 14:10
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