Browsing this Thread:
2 Anonymous Users
|
有關外接eeprom 的問題
|
|
中級會員
Joined
: 2009/8/1 13:22 最後登入時間
: 2010/2/3 11:26
Group:
註冊會員
Level : 6 HP : 0 / 137 MP : 19 / 6079 EXP : 48
|
使用環境:MPLAB V8.36 MCC18 V3.31 ICD3 PIC18F24J50 CONFIG 設定(XMAL=12MHZ)
EEPROM是用MX25L8005
使用spi2 把接腳用pps印射到接腳
OpenSPI2(SPI_FOSC_4 , MODE_00, SMPMID); OUT_PIN_PPS_RP11 = OUT_FN_PPS_SCK2; OUT_PIN_PPS_RP12 = OUT_FN_PPS_SDO2; IN_FN_PPS_SDI2 = IN_PIN_PPS_RP13; IN_FN_PPS_SCK2IN = IN_PIN_PPS_RP11;
現在已經用示波器讀出SDK、SDO的資料,但回傳的資料都是0X00。 請問還有哪些需要注意的?
以下是我的程式 void EEP_WREN(void) { EEP_CS LOW; WriteSPI2(WREN); EEP_CS HIGH; } void EEP_WRDI(void) { EEP_CS LOW; WriteSPI2(WRDI); EEP_CS HIGH; } void EEP_SE(void) { EEP_WREN(); EEP_CS LOW; WriteSPI2(SE); WriteSPI2(0x00); //位子0X000000 WriteSPI2(0x00); WriteSPI2(0x00); EEP_CS HIGH; delay_ms(60); } unsigned char EEP_READ(void) { char worr; int hunter; EEP_CS LOW; WriteSPI2(READ); WriteSPI2(0x00); WriteSPI2(0x00); WriteSPI2(0x00);
worr = ReadSPI2(); EEP_CS HIGH; return worr; }
void EEP_WRITE(unsigned char Rog) { int a; EEP_WREN(); EEP_CS LOW; WriteSPI2(WRITE); WriteSPI2(0x00); WriteSPI2(0x00); WriteSPI2(0x00);
WriteSPI2(Rog); EEP_CS HIGH; EEP_WRDI(); }
發表於: 2009/11/9 10:09
|
|
You can view topic.
你 不可以 發起新主題
You cannot reply to posts.
You cannot edit your posts.
You cannot delete your posts.
You cannot add new polls.
You cannot vote in polls.
You cannot attach files to posts.
You cannot post without approval.
You cannot use topic type.
You cannot use HTML syntax.
You cannot use signature.
You cannot create PDF files.
You cannot get print page.