28377s 的SPI 例程GPIO使用自发自收，未使用GPIO，是否配置有误？另外配置SPI和GPIO使用查询发送数据，示波器没有数据且无时钟信号。

Smith John2

问题：28377的例程中SPI的GPIO使用为GPIO16 GPIO17 GPIO18 GPIO19 ，但是实际上SPI使用的都是这几个。调试过程中我使用了SPIA，设置GPIO58 、59、60、61。使用的是查询方式发送数据，SPITXBUF寄存器的值为我设定的值，但是使用示波器没有时钟信号和数据信号。

    GpioCtrlRegs.GPBPUD.bit.GPIO58 = 0;   // Enable pull-up on GPIO16 (SPISIMOA)
    GpioCtrlRegs.GPBPUD.bit.GPIO59 = 0;   // Enable pull-up on GPIO17 (SPISOMIA)
    GpioCtrlRegs.GPBPUD.bit.GPIO60 = 0;   // Enable pull-up on GPIO18 (***)
    GpioCtrlRegs.GPBPUD.bit.GPIO61 = 0;   // Enable pull-up on GPIO19 (SPISTEA)

    GpioCtrlRegs.GPBQSEL2.bit.GPIO58 = 3; // Asynch input GPIO16 (SPISIMOA)
    GpioCtrlRegs.GPBQSEL2.bit.GPIO59 = 3; // Asynch input GPIO17 (SPISOMIA)
    GpioCtrlRegs.GPBQSEL2.bit.GPIO60 = 3; // Asynch input GPIO18 (***)
    GpioCtrlRegs.GPBQSEL2.bit.GPIO61 = 3; // Asynch input GPIO19 (SPISTEA)

    GpioCtrlRegs.GPBMUX2.bit.GPIO58 = 3; // Configure GPIO16 as SPISIMOA
    GpioCtrlRegs.GPBMUX2.bit.GPIO59 = 3; // Configure GPIO17 as SPISOMIA
    GpioCtrlRegs.GPBMUX2.bit.GPIO60 = 3; // Configure GPIO18 as ***
    GpioCtrlRegs.GPBMUX2.bit.GPIO61 = 3; // Configure GPIO19 as SPISTEA

SPI配置

SpiaRegs.***.all =0x004F; //CLKPOLARITY=1，16bit

SpiaRegs.***.all =0x0006; //CLK_PHASE=0，master

SpiaRegs.SPIBRR.all =0x001F;
SpiaRegs.***.all =0x00CF; //CLKPOLARITY=1，Reset，16bit

SpiaRegs.SPIPRI.bit.FREE = 1;

主函数

void main(void)
{
Uint16 sdata; // send data
Uint16 rdata; // received data

InitSysCtrl();

InitSpiaGpio();

DINT;

InitPieCtrl();

   IER = 0x0000;
   IFR = 0x0000;

   InitPieVectTable();

   spi_init();    // init SPI

   sdata = 0x1011;
   for(;;)
   {
     spi_xmit(sdata);
     DELAY_US(100000L);
   }
}

9 年多前

0 Jason Wu4 9 年多前

Mastermind 6280 points

GPIO16 GPIO17 GPIO18 GPIO19关于SPI的配置屏蔽了么？

0 Smith John2 9 年多前回复 Jason Wu4

Prodigy 151 points

我使用修改后是屏蔽了的。能不能看出来哪里有问题。

0 囧 9 年多前

TI__Mastermind 23997 points

GpioCtrlRegs.GPBQSEL2.bit.GPIO58 = 3; // Asynch input GPIO16 (SPISIMOA)
    GpioCtrlRegs.GPBQSEL2.bit.GPIO59 = 3; // Asynch input GPIO17 (SPISOMIA)
    GpioCtrlRegs.GPBQSEL2.bit.GPIO60 = 3; // Asynch input GPIO18 (SPICLKA)
    GpioCtrlRegs.GPBQSEL2.bit.GPIO61 = 3; // Asynch input GPIO19 (SPISTEA)

    GpioCtrlRegs.GPBMUX2.bit.GPIO58 = 3; // Configure GPIO16 as SPISIMOA
    GpioCtrlRegs.GPBMUX2.bit.GPIO59 = 3; // Configure GPIO17 as SPISOMIA
    GpioCtrlRegs.GPBMUX2.bit.GPIO60 = 3; // Configure GPIO18 as SPICLKA
    GpioCtrlRegs.GPBMUX2.bit.GPIO61 = 3; // Configure GPIO19 as SPISTEA

你的mux和滤波设置有做eallow保护吗？另外GPIO58到GPIO61是高速SPI口，你设置内部input qualification是没用的

0 Smith John2 9 年多前回复囧

Prodigy 151 points

eallow写了保护，没粘过来（抱歉）！你说的高速SPI口，不是可以通过HS_MODE = 0不使能高速SPI模式，我已经配置成不使用高速SPI模式！能不能说具体点为什么设置内部input qualification没有用。这个问题调了几天了，非常感谢。

0 囧 9 年多前回复 Smith John2

TI__Mastermind 23997 points

NOTE: High-speed SPI and AUXCLKIN use a different signal path that does not support inversion or
qualification. For more details on high-speed SPI pins, see Section 6.6.

TRM的GPIO那一章有这句话，就是只要这四个GPIO mux成SPI就没有input qualification功能，不管你是不是禁止了HS _MODE

0 Smith John2 9 年多前回复囧

Prodigy 151 points

那我需要使用这个gpio该怎么使用呢？

0 囧 9 年多前回复 Smith John2

TI__Mastermind 23997 points

你是要把这四个GPIO变成SPI还是只是GPIO功能？没有太明白你的意思

0 Smith John2 9 年多前回复囧

Prodigy 151 points

spi功能

0 囧 9 年多前回复 Smith John2

TI__Mastermind 23997 points

你可以用这四个GPIO作为SPI口用，但是和其他GPIO有区别的是，这四个是高速SPI口，所以只要你mux成SPI，和普通SPI口不同的是，gpio input qualification就会无效，但是SPI功能是正常的

0 wenlin zhou 9 年多前

Prodigy 10 points

我遇到了相同的问题，请教一下后来怎么解决的？

0 Zhaoming Liu 8 年多前回复囧

Prodigy 160 points

您好，我也遇到了SPI没有反应的问题，我用的是SPIB口，配置如下：

GpioCtrlRegs.GPBPUD.bit.GPIO63 = 0; // Enable pull-up on GPIO16 (SPISIMOA)
GpioCtrlRegs.GPCPUD.bit.GPIO64 = 0; // Enable pull-up on GPIO17 (SPISOMIA)
GpioCtrlRegs.GPCPUD.bit.GPIO65 = 0; // Enable pull-up on GPIO18 (SPICLKA)
GpioCtrlRegs.GPCPUD.bit.GPIO66 = 0; // Enable pull-up on GPIO19 (SPISTEA)

GpioCtrlRegs.GPBQSEL2.bit.GPIO63 = 3; // Asynch input GPIO16 (SPISIMOA)
GpioCtrlRegs.GPCQSEL1.bit.GPIO64 = 3; // Asynch input GPIO17 (SPISOMIA)
GpioCtrlRegs.GPCQSEL1.bit.GPIO65 = 3; // Asynch input GPIO18 (SPICLKA)
GpioCtrlRegs.GPCQSEL1.bit.GPIO66 = 3; // Asynch input GPIO19 (SPISTEA)

GpioCtrlRegs.GPBGMUX2.bit.GPIO63 = 3;
GpioCtrlRegs.GPCGMUX1.bit.GPIO64 = 3;
GpioCtrlRegs.GPCGMUX1.bit.GPIO65 = 3;
GpioCtrlRegs.GPCGMUX1.bit.GPIO66 = 3;

GpioCtrlRegs.GPBMUX2.bit.GPIO63 = 3;
GpioCtrlRegs.GPCMUX1.bit.GPIO64 = 3;
GpioCtrlRegs.GPCMUX1.bit.GPIO65 = 3;
GpioCtrlRegs.GPCMUX1.bit.GPIO66 = 3;

发送数据是没有反应，使用命令职位SC端 GpioDataRegs.GPCCLEAR.bit.GPIO66 = 1，观察寄存器时发现也没有变化，目前还不知是怎么回事，非常感谢您的帮助。

0 Zhaoming Liu 8 年多前回复 wenlin zhou

Prodigy 160 points

您好，我也遇到了相同的问题，不知您是否已经解决了

0 Hong Liu37 7 年多前回复 Zhaoming Liu

Intellectual 260 points

我现在也遇到了相同的问题，我使用的CPU是28069，求教

0 ZHAO WANG 5 年多前

Prodigy 130 points

破案了

要加一排寄存器的配置

如下：

EALLOW;

/* Enable internal pull-up for the selected pins */
// Pull-ups can be enabled or disabled by the user.
// This will enable the pullups for the specified pins.
// Comment out other unwanted lines.

     GpioCtrlRegs.GPBPUD.bit.GPIO58 = 0;   // Enable pull-up on GPIO16 (SPISIMOA)
// GpioCtrlRegs.GPAPUD.bit.GPIO5 = 0;    // Enable pull-up on GPIO5 (SPISIMOA)
     GpioCtrlRegs.GPBPUD.bit.GPIO59 = 0;   // Enable pull-up on GPIO17 (SPISOMIA)
// GpioCtrlRegs.GPAPUD.bit.GPIO3 = 0;    // Enable pull-up on GPIO3 (SPISOMIA)
     GpioCtrlRegs.GPBPUD.bit.GPIO60 = 0;   // Enable pull-up on GPIO18 (***)
     GpioCtrlRegs.GPBPUD.bit.GPIO61 = 0;   // Enable pull-up on GPIO19 (SPISTEA)

/* Set qualification for selected pins to asynch only */
// This will select asynch (no qualification) for the selected pins.
// Comment out other unwanted lines.

     GpioCtrlRegs.GPBQSEL2.bit.GPIO58 = 3; // Asynch input GPIO16 (SPISIMOA)
// GpioCtrlRegs.GPAQSEL1.bit.GPIO5 = 3; // Asynch input GPIO5 (SPISIMOA)
     GpioCtrlRegs.GPBQSEL2.bit.GPIO59 = 3; // Asynch input GPIO17 (SPISOMIA)
// GpioCtrlRegs.GPAQSEL1.bit.GPIO3 = 3; // Asynch input GPIO3 (SPISOMIA)
     GpioCtrlRegs.GPBQSEL2.bit.GPIO60 = 3; // Asynch input GPIO18 (***)
     GpioCtrlRegs.GPBQSEL2.bit.GPIO61 = 3; // Asynch input GPIO19 (SPISTEA)

/* Configure SPI-A pins using GPIO regs*/
// This specifies which of the possible GPIO pins will be SPI functional pins.
// Comment out other unwanted lines.

     GpioCtrlRegs.GPBGMUX2.bit.GPIO58 = 3; // Configure GPIO16 as SPISIMOA
// GpioCtrlRegs.GPAMUX1.bit.GPIO5 = 2; // Configure GPIO5 as SPISIMOA
     GpioCtrlRegs.GPBGMUX2.bit.GPIO59= 3; // Configure GPIO17 as SPISOMIA
// GpioCtrlRegs.GPAMUX1.bit.GPIO3 = 2; // Configure GPIO3 as SPISOMIA
     GpioCtrlRegs.GPBGMUX2.bit.GPIO60 =3; // Configure GPIO18 as ***
     GpioCtrlRegs.GPBGMUX2.bit.GPIO61 = 3; // Configure GPIO19 as SPISTEA

     GpioCtrlRegs.GPBMUX2.bit.GPIO58 = 3; // Configure GPIO16 as SPISIMOA
// GpioCtrlRegs.GPAMUX1.bit.GPIO5 = 2; // Configure GPIO5 as SPISIMOA
     GpioCtrlRegs.GPBMUX2.bit.GPIO59= 3; // Configure GPIO17 as SPISOMIA
// GpioCtrlRegs.GPAMUX1.bit.GPIO3 = 2; // Configure GPIO3 as SPISOMIA
     GpioCtrlRegs.GPBMUX2.bit.GPIO60 =3; // Configure GPIO18 as ***
     GpioCtrlRegs.GPBMUX2.bit.GPIO61 = 3; // Configure GPIO19 as SPISTEA

EDIS;

也就是要加这个GPBGMUX2的寄存器配置才能用。

C2000 微控制器

C2000™︎ 微控制器论坛

28377s 的SPI 例程GPIO使用自发自收，未使用GPIO，是否配置有误？另外配置SPI和GPIO使用查询发送数据，示波器没有数据且无时钟信号。