PIC32 SPI连接

Question

我有自己的带有PIC32MX795F512L的电路板，我正在尝试将它连接到SPI (M95128-DRE)。我正在写入一个字节(0x80)并读取它(在5ms延迟之后)，但读取结果总是0xFF。我是不是做错了什么？代码：

while(true)
{
  YB_posX = 0;
  uint8_t ENA= 0b00000110; //ROM write-enable instruction
  uint8_t INS1=0b00000010; //ROM write instruction
  uint8_t add1=0x00; //address byte 1
  uint8_t add2=0xee; //address byte 2
  uint8_t INS2=0b00000011; //ROM read instruction
  uint8_t INS3=0b00000101; //read status register
  uint8_t DIS = 0b00000100; //write disable sequence
  PLIB_SPI_BufferClear(SPI_ID_4);
  LATEbits.LATE9= 0 ; // EEPROM Chip Select
  PLIB_SPI_BufferWrite (SPI_ID_4,ENA); // Write Enable
  LATEbits.LATE9= 1 ; // EEPROM Chip Select 
  LATEbits.LATE9= 0 ; // EEPROM Chip Select
  PLIB_SPI_BufferWrite (SPI_ID_4,INS1);
  PLIB_SPI_BufferWrite (SPI_ID_4,add1);
  PLIB_SPI_BufferWrite (SPI_ID_4,add2);
  PLIB_SPI_BufferWrite (SPI_ID_4,0x80); //the previous five instructions writed byte 0x50 to address(1+2)
  delay_ms(1); 
  //<-----------------
  LATEbits.LATE9=1; 
  delay_ms(5); 
  LATEbits.LATE9=0; 
  delay_ms(1); 
  PLIB_SPI_BufferWrite (SPI_ID_4,INS2); //reading instruction 
  PLIB_SPI_BufferWrite (SPI_ID_4,add1);
  PLIB_SPI_BufferWrite (SPI_ID_4,add2); 
  PLIB_SPI_BufferWrite (SPI_ID_4,0x00); //this line is necessary since the ROM needs clock signal to clock out the data.
  while(!PLIB_SPI_TransmitBufferIsEmpty(SPI_ID_4))
    {} 
  YB_posX = PLIB_SPI_BufferRead(SPI_ID_4); 
  PLIB_SPI_ReceiverOverflowClear(SPI_ID_4); 
  delay_ms(1);
  LATEbits.LATE9=1; //end of reading sequence 
  printNumI(YB_posX, 350, 235, 1, ' ');
  delay_ms(1000); 
 }

Needless to mention that the SPI is initialised and opened at the start of main.



   int main(void) {
       /* Initialise all MPLAB Harmony modules, including application(s). */
       SYS_Initialize(NULL);
      DRV_SPI0_Initialize(); // SPI initialise 
       DRV_SPI_Open(SPI_ID_4,DRV_IO_INTENT_EXCLUSIVE );

我使用的是MPLABXv.5.05，X32 v2.10和和谐配置器，附件是SPI设置的快照。欢迎任何建议。

Answer 1

问题出在和声本身。不幸的是，如果你从Harmony开始一个项目，就没有回头路了。你必须从头开始重写整个代码。

解决方案:修改spi示例\MPLAB\microchip\harmony\v2_06\apps\driver\spi\serial_eeprom

建议不要转移到Harmony v.3！大多数示例都没有在那里运行。