STM32L073RZT 调试SPI问题

现象描述：

spi通信一次后，第二次通信spi的SR寄存器异常0xFF31(MODF, CRCERR, RXNE)，通信失败。

以下为调用流程及相关代码：

NFC_ID();

NFC_REG_B_TEST();

 

//SPI 读
void SPI_Read_Data(uint8_t* w_data, uint32_t w_size, uint8_t* r_data, uint32_t r_size) {SET_SPI_CSS(GPIO_PIN_RESET);HAL_SPI_Transmit(&hspi1, (uint8_t*)w_data, w_size, 1000);HAL_SPI_Receive(&hspi1, (uint8_t*)r_data, r_size, 1000);SET_SPI_CSS(GPIO_PIN_SET);
}

#include "st25r3920b.h"static void ReadREG(REGIST_x blockx, uint8_t reg_addr, uint8_t* data, uint32_t size) {reg_addr |= 0x40;uint16_t reg_b = 0;if(REGIST_A == blockx) {SPI_Read_Data(&reg_addr, 1, data, size);}else if(REGIST_B == blockx) {reg_b = (((uint16_t)0xFB) << 8) | reg_addr;SPI_Read_Data((uint8_t*)&reg_b, 2, data, size);}
}static void WriteREG(REGIST_x blockx, uint8_t reg_addr, uint8_t* data, uint32_t size) {reg_addr |= 0x00;if(REGIST_A == blockx) {SPI_Write_Data(&reg_addr, 1);SPI_Write_Data(data, size);}else if(REGIST_B == blockx) {uint16_t reg_b = (((uint16_t)0xFB) << 8) | reg_addr;SPI_Write_Data((uint8_t*)&reg_b, 2);SPI_Write_Data(data, size);}
}void NFC_ID(void){ uint8_t chip_id = 0;ReadREG(REGIST_A, CHIP_ID__REG, &chip_id, 1);UART1_printf("ID: 0x%02X\r\n", chip_id);
}void NFC_REG_B_TEST(void){ uint8_t value = 0;ReadREG(REGIST_B, TX_DRIVER_TIMING_REG, &value, 1);UART1_printf("0x29 REG: 0x%02X\r\n", value);
}

 

 

 

问题分析调试：

用  UART1_printf("SPI_SR:%X\r\n", hspi1.Instance->SR) 输出SPI状态寄存器值

1. 单步调试，取人SR寄存器的值为： 第二次通信前0xFF31

怀疑两次SPI通信间的间隔时间太短 ==》添加延时函数后，无效果。

2. 将串口输出当道第一次通信之前，第一次通信前0x2; 发现输出后两次通信均异常

根据经验怀疑可能是 勾选了 “Use MicroLIB” 造成的，去掉勾选后果然正常了。