stm8l151C6物理SPI和 RC522 链接问题

只看该作者 · 2018-5-19 10:50

调试好几天了，在网上试了好多方法还是不通，希望有大神给看下到底代码写的对不对，大家往下看：
硬件连接：
   使用的单片机为stm8l151C6，物理SPI和一个RC522芯片进行连接，没有SCK时钟
   PB4：NSS片选
   PB5：SCK
   PB6：MOSI
   PB7：MISO
   PC4：RST（复位）
   PD6：pwr（电源，自己为低功耗设计）
问题：
   物理SPI初始化使能之后一直写数据，用示波器检测SCK引脚时钟，发现没有时钟信号
   程序一直卡在while (SPI_GetFlagStatus(SPI1, SPI_FLAG_RXNE) == RESET)
   模拟SPI通信没有问题
代码如下：
void main(void)
{
hardware_init();
//enableInterrupts();
while (1)
{
//       ReadRawRC(0x05);
      SPIWritebyte(0xAA);
//       BSP_RFID_WriteRegister(CommandReg,0xAA);
//    gpio_set_low(PORTB, PIN5);
//    gpio_set_high(PORTB, PIN5);
}
}

void hardware_init(void)
{
u8 rv = 0;
u8 ctrl_reg = 0, ver_reg = 0;

// gpio_set_high(PORTD, PIN7);
// system clock init
sysclk_init_hsi(CLK_SYSCLKDiv_1);
//CLK_HSIPrescalerConfig(CLK_PRESCALER_HSIDIV1);
/* Select HSE as system clock source */
//  CLK_SYSCLKSourceSwitchCmd(ENABLE);
//  CLK_SYSCLKSourceConfig(CLK_SYSCLKSource_HSE);
  /*High speed external clock prescaler: 1*/
//  CLK_SYSCLKDivConfig(CLK_SYSCLKDiv_1);

// com load configuration & init
com_load_config(com_cfg, 1);
com_init(COM1, 2400, USART_WordLength_9b, USART_StopBits_1, USART_Parity_Even, USART_Mode_All, ENABLE, 0);
com_recv_init(COM1);

/* Check if the system has resumed from IWDG reset */
if (RST_GetFlagStatus(RST_FLAG_IWDGF) != RESET)
{
      /* Clear IWDGF Flag */
      RST_ClearFlag(RST_FLAG_IWDGF);
      printf("RST_FLAG_IWDGF\r\n");
}

// rtc init
rtc_init();

BSP1_RFID_LoadConfig(&rfid_config); //加载管脚配置
CLK_PeripheralClockConfig(CLK_Peripheral_SPI1, ENABLE);
GPIO_Init(GPIOB, GPIO_Pin_4, GPIO_Mode_Out_PP_High_Fast); //NSS片选
GPIO_Init(GPIOB, GPIO_Pin_5, GPIO_Mode_Out_PP_High_Fast); //SCK
GPIO_Init(GPIOB, GPIO_Pin_6, GPIO_Mode_Out_PP_High_Fast); //MOSI
//主机模式，配置为输入
GPIO_Init(GPIOB, GPIO_Pin_7, GPIO_Mode_In_PU_No_IT); //MISO

BSP1_RFID_PowerOn();       //给RC522芯片上电
//BSP1_RFID_PowerOff();

SPI_DeInit(SPI1);
SPI_Init(SPI1, SPI_FirstBit_MSB, SPI_BaudRatePrescaler_8, SPI_Mode_Master,SPI_CPOL_Low, SPI_CPHA_1Edge,SPI_Direction_2Lines_FullDuplex, SPI_NSS_Soft, 0x07);
//SPI_Init(SPI1, SPI_FirstBit_MSB, SPI_BaudRatePrescaler_128, SPI_Mode_Master,SPI_CPOL_High, SPI_CPHA_2Edge,SPI_Direction_2Lines_FullDuplex, SPI_NSS_Soft, 0x07);
SPI_Cmd(SPI1, ENABLE);  /* 使能SPI */

rv = BSP1_RFID_Reset(&ctrl_reg, &ver_reg);  //和PcdReset库函数一模一样
printf("ctrl_reg:%02X, ver_reg:%02X\r\n", ctrl_reg, ver_reg);
if (rv != 0)
{
      printf("rfid init error\r\n");
}
BSP_RFID_AntennaOff();
delay_ms(1);
BSP_RFID_AntennaOn();
BSP_RFID_ConfigISOType('A');       //针对ISO14443A型卡进行初始化

return;
}

/*! \brief
*    rc522 reset
* \return
*    MI_OK    - success
*    MI_ERR    - failure
*/
char BSP1_RFID_Reset(u8 *ctrl_reg, u8 *version)
{
unsigned char val = 0;

/* set rc522 rst to push pull output state , and set it to 0 */
BSP_GPIO_Init(rfid_config_handler->rst.port, rfid_config_handler->rst.pin, GPIO_Mode_Out_PP_Low_Fast);
// /* set rs522 nss to push pull output state, and set it to 1, disable sck,mosi,miso pin */
// BSP_GPIO_Init(rfid_config_handler->nss.port, rfid_config_handler->nss.pin, GPIO_Mode_Out_PP_High_Fast);
// /* set rc522 sck to push pull output state, and set it to 1 */
// BSP_GPIO_Init(rfid_config_handler->sck.port, rfid_config_handler->sck.pin, GPIO_Mode_Out_PP_High_Fast);
// /* set rc522 miso to push up input state*/
// BSP_GPIO_Init(rfid_config_handler->miso.port, rfid_config_handler->miso.pin, GPIO_Mode_In_PU_No_IT);
// //BSP_GPIO_Init(rfid_config_handler->miso.port, rfid_config_handler->miso.pin, GPIO_Mode_Out_PP_High_Fast);
// /* set rc522 mosi to push pull output state, and set it to 1 */
// BSP_GPIO_Init(rfid_config_handler->mosi.port, rfid_config_handler->mosi.pin, GPIO_Mode_Out_PP_High_Fast);

delay_us(10);

/* rs522 will be reset by setting rst to execute 1-0-1 sequence. */
BSP_GPIO_SetHigh(rfid_config_handler->rst.port, rfid_config_handler->rst.pin);
delay_us(10);
BSP_GPIO_SetLow(rfid_config_handler->rst.port, rfid_config_handler->rst.pin);
delay_us(10);
BSP_GPIO_SetHigh(rfid_config_handler->rst.port, rfid_config_handler->rst.pin);
delay_us(10);

// RC522_RST_H();
// delay_us(10);
// RC522_RST_L();
// delay_us(10);
// RC522_RST_H();
// delay_us(10);

WriteRawRC(CommandReg,PCD_RESETPHASE);
delay_us(10);

WriteRawRC(ModeReg,0x3D);          //和Mifare卡通讯，CRC初始值0x6363
WriteRawRC(TReloadRegL,30);
WriteRawRC(TReloadRegH,0);
WriteRawRC(TModeReg,0x8D);
WriteRawRC(TPrescalerReg,0x3E);

WriteRawRC(TxAutoReg,0x40);//必须要

val = ReadRawRC(ControlReg);
if (val == 0xFF)
{
      //printf("CtlReg:%02X\r\n", val);
      return MI_ERR;
}

*ctrl_reg = val;

val = ReadRawRC(VersionReg);
if (val == 0xFF)
{
      //printf("Ver:%02X\r\n", val);
      return MI_ERR;
}

*version = val;
//
// BSP_RFID_AntennaOff();
// BSP_RFID_ConfigISOType('A');
// delay_ms(1);
// BSP_RFID_AntennaOn();

return MI_OK;
}

void SPIWritebyte(u8 Byte)
{
  u16 retry=0;
//  u8 rv = 0;

  while (SPI_GetFlagStatus(SPI1, SPI_FLAG_TXE) == RESET)
  {
retry++;
if(retry>200)
{
   return;
}
  }
  SPI_SendData(SPI1, Byte);
  retry=0;
  //while (SPI_GetFlagStatus(SPI1, SPI_FLAG_RXNE) == RESET)
  while (SPI_GetFlagStatus(SPI1, SPI_FLAG_BSY) == SET)
  {
retry++;
if(retry>400)return;
  }
  while (SPI_GetFlagStatus(SPI1, SPI_FLAG_RXNE) == RESET)
  {
retry++;
if(retry>400)return;
  }
  SPI_ReceiveData(SPI1);
}