【GD32L233C-START 评测】-六、SPI驱动RC522刷卡

kit7828

【GD32L233C-START 评测】-六、SPI驱动RC522刷卡 [复制链接]

刚好要做个刷卡的测试，就利用GD开始了

RC522是买的网上通用的那种廉价的，RST接到PB0，SDA接PB12，SCK接PB13，MISO接PB14，MOSI接PB15.

GD32的MCU手册中可以查到，使用spi需要重映射为AF6

于是，发现一个大坑

PB12这里一直出问题，后来查了其他测友的文章，只映射PB13-PB15，就OK了，不知道其他测友有没有遇到类似的问题。

#define SPI_CS_PORT			GPIOB
#define	SPI_CS_PIN			GPIO_PIN_12
#define RST_522_PORT		GPIOB
#define	RST_522_PIN			GPIO_PIN_0

#define	RCU_SPI_PORT		RCU_GPIOB

#define SPI_CS_HIGH     gpio_bit_set(SPI_CS_PORT, SPI_CS_PIN)
#define SPI_CS_LOW      gpio_bit_reset(SPI_CS_PORT, SPI_CS_PIN) 

#define RST_522_HIGH    gpio_bit_set(RST_522_PORT, RST_522_PIN) 
#define RST_522_LOW    	gpio_bit_reset(RST_522_PORT, RST_522_PIN)

宏定义之后的初始化代码如下

void SpiInit(void)
{
	spi_parameter_struct spi_init_struct;
	rcu_periph_clock_enable(RCU_SPI_PORT);
	rcu_periph_clock_enable(RCU_SPI1);
	
	gpio_mode_set(RST_522_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, RST_522_PIN );
  gpio_output_options_set(RST_522_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, RST_522_PIN);
	
	/* SPI1 GPIO configuration: NSS/PB12 */
	gpio_mode_set(SPI_CS_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, SPI_CS_PIN );
	gpio_output_options_set(SPI_CS_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, SPI_CS_PIN);

	/* SPI1 GPIO configuration: SCK/PB13, MISO/PB14, MOSI/PB15 */
	gpio_af_set(GPIOB, GPIO_AF_6, GPIO_PIN_13 | GPIO_PIN_14 | GPIO_PIN_15);
	gpio_mode_set(GPIOB, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO_PIN_13 | GPIO_PIN_14 | GPIO_PIN_15);
	gpio_output_options_set(GPIOB, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_13 | GPIO_PIN_14 | GPIO_PIN_15);

	/* deinitilize SPI and the parameters */
	spi_i2s_deinit(SPI1);
	spi_struct_para_init(&spi_init_struct);

	/* SPI1 parameter configuration */
	spi_init_struct.trans_mode           = SPI_TRANSMODE_FULLDUPLEX;
	spi_init_struct.device_mode          = SPI_MASTER;
	spi_init_struct.frame_size           = SPI_FRAMESIZE_8BIT;
	spi_init_struct.clock_polarity_phase = SPI_CK_PL_LOW_PH_1EDGE;
	spi_init_struct.nss                  = SPI_NSS_SOFT;
	spi_init_struct.prescale             = SPI_PSC_8;
	spi_init_struct.endian               = SPI_ENDIAN_MSB;
	spi_init(SPI1, &spi_init_struct);
	
	spi_crc_polynomial_set(SPI1, 7);

	spi_enable(SPI1);
}

Rc522的代码是以前stm32的项目中翻过来的

uint8_t Scan_Card(void)
{
    uint8_t status, i, snr;
    static u8 Key[6] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
		//static u8 Tempbuf[16] ={0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C};;
    u8 CardID[5];

    status = MI_NOTAGERR;
    for(i = 0; i < 4; i++)//将存放卡号的数组清空
        CardID[i] = 0;
    status = PcdRequest(PICC_REQALL, CardID);//寻卡，CardID存放卡类型
    
		if(status == MI_OK)
		{
				status = PcdAnticoll(CardID);//防冲撞
				if(status == MI_OK)
				{
						//printf ( "\r\n防冲撞OK" );
						status = PcdSelect(CardID);//选定卡片--参数为卡的序列号
						if(status == MI_OK)
						{
								printf ( "\r\n选定卡片OK" );
//										snr = 8;
//                    status = PcdAuthState(PICC_AUTHENT1A, (snr * 4 - 1), Key, CardID);
//                    //验证密码
//                    if(status == MI_OK)
//                        printf ( "\r\n验证密码成功" );
//										else
//												printf ( "\r\n验证密码失败" );
//										
								//Display_CARD( CardID [ 0 ], CardID [ 1 ], CardID [ 2 ], CardID [ 3 ] );
								printf("\r\n Scan_Card No.:  %d-%d-%d-%d",CardID [ 0 ], CardID [ 1 ], CardID [ 2 ], CardID [ 3 ]);
								return MI_OK;
						}
				}
    }
    else
        status = MI_NOTAGERR;

		return status;
}

初始化后，在main主循环中调用Scan_Card就能看到效果了