M0516的SPI1调试问题

只看该作者 · 2015-7-22 23:40

本帖最后由 gameboy22 于 2015-7-26 22:26 编辑

最近用M0516调试NRF24L01，但是检测不到24L01；后来在线调试仿真，发现，向SPI1的TX0寄存器写数据的时候，写不进去，不知道是什么问题，我用的是SPI1.下面是相关源代码！
/*********************************************************/
/*SPI1初始化函数                                                                */
/*********************************************************/

void SPI1_Init(void)
{
   SPI1->CNTRL = SPI_CNTRL_MASTER_MODE | SPI_CNTRL_CLK_IDLE_LOW | SPI_CNTRL_MSB_FIRST | SPI_CNTRL_TX_RISING |
                           SPI_CNTRL_RX_RISING | SPI_CNTRL_TX_BIT_LEN(8);

   SPI1->DIVIDER = (SPI1->DIVIDER & (~SPI_DIVIDER_DIVIDER_Msk)) | SPI_DIVIDER_DIV(11);//HCLK / ((2+1)*2) = 8MHz
}

void GPIO_Init(void)
{

   GPIO->DBNCECON = GPIO_DBNCECON_ICLK_ON | GPIO_DBNCECON_DBCLKSRC_HCLK | GPIO_DBNCECON_DBCLKSEL_32768;

   P0->PMD = GPIO_PMD_PMD0_OUTPUT | GPIO_PMD_PMD1_OUTPUT | GPIO_PMD_PMD2_OUTPUT | GPIO_PMD_PMD3_OUTPUT
                  | GPIO_PMD_PMD6_QUASI  | GPIO_PMD_PMD4_OUTPUT | GPIO_PMD_PMD7_OUTPUT | GPIO_PMD_PMD5_QUASI;

   P1->PMD = GPIO_PMD_PMD6_INPUT  | GPIO_PMD_PMD7_INPUT | GPIO_PMD_PMD2_OUTPUT  | GPIO_PMD_PMD3_OUTPUT;

   P2->PMD = GPIO_PMD_PMD0_OUTPUT | GPIO_PMD_PMD1_OUTPUT | GPIO_PMD_PMD2_OUTPUT | GPIO_PMD_PMD3_OUTPUT |
                     GPIO_PMD_PMD4_OUTPUT | GPIO_PMD_PMD5_OUTPUT | GPIO_PMD_PMD6_INPUT  | GPIO_PMD_PMD7_OUTPUT;

   P3->PMD = GPIO_PMD_PMD2_INPUT  | GPIO_PMD_PMD3_INPUT  | GPIO_PMD_PMD6_INPUT  | GPIO_PMD_PMD7_INPUT;

   P4->PMD = GPIO_PMD_PMD0_OUTPUT | GPIO_PMD_PMD1_OUTPUT | GPIO_PMD_PMD3_INPUT       | GPIO_PMD_PMD2_OUTPUT       |
                     GPIO_PMD_PMD4_OUTPUT | GPIO_PMD_PMD5_OUTPUT;

   P3->PMD |= GPIO_PMD_PMD4_QUASI  | GPIO_PMD_PMD5_OUTPUT;

   GPIO_EnableInt(P3, 6, GPIO_INT_RISING);
   GPIO_EnableInt(P3, 2, GPIO_INT_RISING);
   GPIO_EnableInt(P1, 7, GPIO_INT_RISING);

   NVIC_EnableIRQ(GPIO_P2P3P4_IRQn);
   NVIC_EnableIRQ(GPIO_P0P1_IRQn);

   NVIC_EnableIRQ(EINT0_IRQn);
}

void SYS_Init(void)
{
   SYS_UnlockReg();
      SYSCLK->PWRCON |= SYSCLK_PWRCON_XTL12M_EN_Msk | SYSCLK_PWRCON_IRC10K_EN_Msk;

   SYS_WaitingForClockReady( SYSCLK_CLKSTATUS_XTL12M_STB_Msk);

   SYSCLK->CLKSEL0 = SYSCLK_CLKSEL0_HCLK_XTAL;

   SYSCLK->PLLCON |= SYSCLK_PLLCON_PD_Msk;

   SYSCLK->PLLCON = PLLCON_SETTING;

   SYS_WaitingForClockReady(SYSCLK_CLKSTATUS_PLL_STB_Msk | SYSCLK_CLKSTATUS_XTL12M_STB_Msk  | SYSCLK_CLKSTATUS_IRC10K_STB_Msk);

   SYSCLK->CLKSEL0 = SYSCLK_CLKSEL0_STCLK_HCLK_DIV2 | SYSCLK_CLKSEL0_HCLK_PLL;

   SYSCLK->APBCLK =       SYSCLK_APBCLK_ADC_EN_Msk | SYSCLK_APBCLK_PWM67_EN_Msk | SYSCLK_APBCLK_PWM45_EN_Msk |
                                    SYSCLK_APBCLK_PWM23_EN_Msk | SYSCLK_APBCLK_PWM01_EN_Msk | SYSCLK_APBCLK_UART0_EN_Msk |
                                       SYSCLK_APBCLK_SPI1_EN_Msk  | SYSCLK_APBCLK_I2C0_EN_Msk  | SYSCLK_APBCLK_FDIV_EN_Msk  |
                                       SYSCLK_APBCLK_TMR3_EN_Msk  | SYSCLK_APBCLK_TMR2_EN_Msk  | SYSCLK_APBCLK_TMR1_EN_Msk  |
                                       SYSCLK_APBCLK_TMR0_EN_Msk  | SYSCLK_APBCLK_WDT_EN_Msk;

   SYSCLK->CLKSEL1 = SYSCLK_CLKSEL1_PWM23_HCLK | SYSCLK_CLKSEL1_PWM01_XTAL  | SYSCLK_CLKSEL1_UART_PLL  |
                                    SYSCLK_CLKSEL1_TMR3_XTAL | SYSCLK_CLKSEL1_TMR2_XTAL | SYSCLK_CLKSEL1_TMR1_XTAL |
                                    SYSCLK_CLKSEL1_TMR0_XTAL | SYSCLK_CLKSEL1_ADC_HCLK | SYSCLK_CLKSEL1_WDT_IRC10K;

SYSCLK->CLKSEL2  = SYSCLK_CLKSEL2_PWM67_HCLK | SYSCLK_CLKSEL2_PWM45_HCLK | SYSCLK_CLKSEL2_FRQDIV_HCLK;

SYSCLK->CLKDIV = SYSCLK_CLKDIV_ADC(7) |
                           SYSCLK_CLKDIV_UART(1) |
                              SYSCLK_CLKDIV_HCLK(1);

SystemCoreClockUpdate();

SYS->P0_MFP = SYS_MFP_P00_GPIO | SYS_MFP_P01_GPIO | SYS_MFP_P02_GPIO | SYS_MFP_P03_GPIO |
                  SYS_MFP_P04_GPIO/*SPISS1*/ | SYS_MFP_P05_MOSI_1 | SYS_MFP_P06_MISO_1 | SYS_MFP_P07_SPICLK1;

SYS->P1_MFP = SYS_MFP_P10_AIN0 | SYS_MFP_P11_AIN1 | SYS_MFP_P12_GPIO/*RXD1*/ | SYS_MFP_P13_GPIO/*TXD1*/ |
                  SYS_MFP_P14_AIN4 | SYS_MFP_P15_AIN5 | SYS_MFP_P16_GPIO | SYS_MFP_P17_GPIO;

SYS->P2_MFP = SYS_MFP_P20_GPIO | SYS_MFP_P21_GPIO | SYS_MFP_P22_GPIO | SYS_MFP_P23_GPIO |
                  SYS_MFP_P24_GPIO | SYS_MFP_P25_GPIO | SYS_MFP_P26_GPIO | SYS_MFP_P27_GPIO;

SYS->P3_MFP = SYS_MFP_P30_RXD0 | SYS_MFP_P31_TXD0 | SYS_MFP_P32_GPIO | SYS_MFP_P33_GPIO |
                  SYS_MFP_P34_GPIO | SYS_MFP_P35_GPIO | SYS_MFP_P36_GPIO | SYS_MFP_P37_GPIO;

SYS->P4_MFP = SYS_MFP_P40_GPIO | SYS_MFP_P41_GPIO | SYS_MFP_P42_PWM2/*GPIO*/ | SYS_MFP_P43_GPIO |
                  SYS_MFP_P44_GPIO | SYS_MFP_P45_GPIO | SYS_MFP_P46_ICE_CLK | SYS_MFP_P47_ICE_DAT;

SYS_LockReg();

}

uint8_t SPIx_ReadWriteByte(uint8_t TxData)
{
      uint8_t u8rx0_tmp = 0;
//       _SPI_WRITE_TX_BUFFER0(SPI1, TxData);                   //发送一个byte
SPI1->TX[0] = TxData;

      _SPI_SET_GO(SPI1);                                                             //启动SPI1传输

//       while(SPI1 ->CNTRL & SPI_CNTRL_GO_BUSY);
      while(_SPI_GET_BUSY_STATUS(SPI1));
      u8rx0_tmp = _SPI_GET_RX0_DATA(SPI1) & 0xff;

      return u8rx0_tmp;       //返回收到的数据

}

上面的源码中，调试到SPI1->TX[0] = TxData;的时候，发现TX0寄存器根本就写不进去，不知道什么原因！