SPI配置有问题

伙计们，我对SPI配置有问题。这是我为SPIPins configWrite函数和mainloop配置的配置。所以在这种配置下，SCK1管脚上总是有一些脉冲，SDO1上什么也没发生。无法理解问题是什么。任何帮助都将非常感激。



      以下为原文

    Guys, I'm having a problem with the SPI configuration.
Here's my config for SPI
void Init_SPI(BYTE spi_module)
{
switch (spi_module)
{
case SPI1:
IEC0bits.SPI1IE = 0; //Disable SPI Interrupts
IEC0bits.SPI1TXIE = 0; //Disable SPI TX Interrupt
IEC3bits.SPI1RXIE = 0; //Disable SPI RX Interrupt
SPI1CON1Lbits.SPIEN = 0; //Disable SPI Module
IFS0bits.SPI1IF = 0; //Clear SPI Int Flag
IFS0bits.SPI1TXIF = 0; //Clear SPI TX Int Flag
IFS3bits.SPI1RXIF = 0; //Clear SPI RX Int Flag
IPC2bits.SPI1IP = 1; //Interrupt Priority
IPC2bits.SPI1TXIP = 0; //TX Int Priority
IPC14bits.SPI1RXIP = 1; //RX Int Priority
IEC0bits.SPI1IE = 1; //Enable SPI Interrupts
IEC0bits.SPI1TXIE = 0; //Disable SPI TX Interrupt
IEC3bits.SPI1RXIE = 1; //Enable SPI RX Interrupt
uint16_t i = SPI1BUFL; //Clear buffer
#ifdef TX_MODE
SPI1CON1Lbits.MSTEN = 1; //Master Mode
#elif defined(RX_MODE)
SPI1CON1Lbits.MSTEN = 0; //Slave Mode
#endif
SPI1CON1Lbits.SPISIDL = 1; //Halt Module in Idle Mode
SPI1CON1Lbits.DISSDO = 0; //SDO Pin Controlled by the Module
SPI1CON1Hbits.AUDEN = 0; //Audio Protocol is Disabled
SPI1CON1Lbits.MODE16 = 0; //8-bit Communication Mode
SPI1CON1Lbits.MODE32 = 0; //...
SPI1CON1Lbits.SMP = 0; //Input Data is Sampled at the Middle of Data Out Time
SPI1CON1Lbits.CKE = 0; //Transmit Happens on Transition from Ide clk state to active clk state
SPI1CON1Lbits.SSEN = 0; //Not Using SS1 Pin
SPI1CON1Lbits.CKP = 1; //Ide State for clk = high, active = low
SPI1CON1Lbits.DISSDI = 0; //SDI Pin Controlled by the Module
SPI1CON1Lbits.MCLKEN = 0; //PBCLK is Used by the BRG
SPI1CON1Lbits.SPIFE = 0; //Frame Sync Pulse Precedes the First Bit Clk
SPI1CON1Lbits.ENHBUF = 0; //Enhanced Buffer Mode is Disabled
SPI1CON1Hbits.SPISGNEXT = 0; //Data from RX FIFO not Sign-Extended
SPI1CON1Hbits.IGNROV = 1; //Receive Overflow is not a Critical Error (data in the FIFO is not Overwritten)
SPI1CON1Hbits.IGNTUR = 1; //Transmit Underrun is not a Critical Error
SPI1CON1Hbits.AUDMONO = 0; //Not in Use
SPI1CON1Hbits.URDTEN = 1; //Transmit SPI1URDT buff during Transmit Underrun
SPI1CON1Hbits.AUDMOD = 0b11; //Not in Use
SPI1CON1Hbits.FRMEN = 0; //Framed Mode Disabled
SPI1CON1Hbits.FRMSYNC = 0; //Frame Sync Pulse Output (Master) - Not in Use
SPI1CON1Hbits.FRMPOL = 1; //Frame Sync Pulse = active-high - Not in Use
SPI1CON1Hbits.MSSEN = 0; //Slave Select is Disabled
SPI1CON1Hbits.FRMSYPW = 0; //Frame Sync Pulse is One Clk Wide - Not in Use
SPI1CON1Hbits.FRMCNT = 0b000; //Generates a Frame Sync Pulse on each Serial Word - Not in Use
SPI1CON2Lbits.WLENGTH = 0b00000; //See MODE bits
SPI1STATLbits.FRMERR = 0; //Clear Frame Error is Detected
SPI1BRGLbits.BRG = 0; //BaudRate = Fpb / 2
SPI1IMSKHbits.RXWIEN = 0; //Disable receive buffer element watermark interrupt
SPI1IMSKHbits.RXMSK = 0b00000; //RX Buffer Mask
SPI1IMSKHbits.TXWIEN = 0; //Disable Transmit Buffer Element Watermark Interrupt
SPI1IMSKHbits.TXMSK = 0b00000; //TX Buffer Mask
SPI1STATLbits.SPIROV = 0; //Clear SPIROV bit
SPI1CON1bits.SPIEN = 1; //Enable SPI1
break;
}
}
Pins config
Unlock_PPS();
//SPI1 Module
TRIS_SDO1 = TRIS_OUT;
TRIS_SDI1 = TRIS_IN;
TRIS_SCK1 = TRIS_OUT;
// Assign SCK1 to RP17
RPOR8bits.RP17R = _RPOUT_SCK1OUT;
// Assign SDO1 to RP16
RPOR8bits.RP16R = _RPOUT_SDO1;
// Assign SDI1 to RP30
RPINR20bits.SDI1R = 30;
//SPI2 Module
TRIS_SDO2 = TRIS_OUT;
TRIS_SDI2 = TRIS_IN;
TRIS_SCK2 = TRIS_IN;
// Assign SCK1 to RP3
RPINR20bits.SCK1R = 3;
// Assign SDO2 to RP4
RPOR2bits.RP4R = _RPOUT_SDO2;
// Assign SDI2 to RP12
RPINR20bits.SDI1R = 12;
Lock_PPS();
Write function
void SPI_Write(BYTE spi, unsigned char data)
{
SPI1BUFL = data;
while (SPI1STATLbits.SPITBF);
}
And main loop
void Main_Loop()
{
while (true)
{
#ifdef TX_MODE
SPI_Write(SPI1, 0x15);
Delay_ms(100);
#endif
}
}
So with this configuration there are always some impulses on the SCK1 pin and nothing happens on the SDO1. Can't understand what is the problem. Any help would be very appreciated.