STM32使用HAL库硬件SPI驱动WK2124一拖四SPI转四路串口芯片

╰+哭是因爲堅強的太久メ 2022-10-20 03:49 931阅读 0赞

# STM32使用HAL库硬件SPI驱动WK2124一拖四SPI转四路串口芯片 #

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### STM32基础工程生成 ###

首先使用STM32CUBEMX生成STM32的基础工程，配置时钟到72M主频：  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxMTUzNDcxNTAz_size_16_color_FFFFFF_t_70][]

配置SPI前，首先查看WK2124的芯片手册，手册里面说明了WK2124的SPI最高支持到10M并且使用SPI模式0，SPI的模式0就是时钟空闲电平为低电平且在第一个时钟延采样：  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxMTUzNDcxNTAz_size_16_color_FFFFFF_t_70 1][]  
所以STM32CUBEMX需要这样配置：  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxMTUzNDcxNTAz_size_16_color_FFFFFF_t_70 2][]  
IO配置：

*  WK2124的硬件复位引脚，这个引脚最好接上，使用STM32的IO进行控制
 *  WK2124的片选引脚
 *  如果用WK2124的中断，那么还需要配置一个IO为外部中断

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### WK2124驱动代码 ###

代码已经测试通过无问题，贴一下：

##### 头文件 #####

/* * wk2xxx.h * * Created on: Jun 17, 2021 * Author: hello */
    
    #ifndef SRC_WK2XXX_H_
    #define SRC_WK2XXX_H_
    
    #include "main.h"
    
    
    #define WK2XXX_GENA 0X00
    #define WK2XXX_GRST 0X01
    #define WK2XXX_GMUT 0X02
    #define WK2XXX_GIER 0X10
    #define WK2XXX_GIFR 0X11
    #define WK2XXX_GPDIR 0X21
    #define WK2XXX_GPDAT 0X31
    //wkxxxx slave uarts rigister address defines
    
    #define WK2XXX_SPAGE 0X03
    //PAGE0
    #define WK2XXX_SCR 0X04
    #define WK2XXX_LCR 0X05
    #define WK2XXX_FCR 0X06
    #define WK2XXX_SIER 0X07
    #define WK2XXX_SIFR 0X08
    #define WK2XXX_TFCNT 0X09
    #define WK2XXX_RFCNT 0X0A
    #define WK2XXX_FSR 0X0B
    #define WK2XXX_LSR 0X0C
    #define WK2XXX_FDAT 0X0D
    #define WK2XXX_FWCR 0X0E
    #define WK2XXX_RS485 0X0F
    //PAGE1
    #define WK2XXX_BAUD1 0X04
    #define WK2XXX_BAUD0 0X05
    #define WK2XXX_PRES 0X06
    #define WK2XXX_RFTL 0X07
    #define WK2XXX_TFTL 0X08
    #define WK2XXX_FWTH 0X09
    #define WK2XXX_FWTL 0X0A
    #define WK2XXX_XON1 0X0B
    #define WK2XXX_XOFF1 0X0C
    #define WK2XXX_SADR 0X0D
    #define WK2XXX_SAEN 0X0E
    #define WK2XXX_RTSDLY 0X0F
    
    //WK串口扩展芯片的寄存器的位定义
    //wkxxx register bit defines
    // GENA
    #define WK2XXX_UT4EN 0x08
    #define WK2XXX_UT3EN 0x04
    #define WK2XXX_UT2EN 0x02
    #define WK2XXX_UT1EN 0x01
    //GRST
    #define WK2XXX_UT4SLEEP 0x80
    #define WK2XXX_UT3SLEEP 0x40
    #define WK2XXX_UT2SLEEP 0x20
    #define WK2XXX_UT1SLEEP 0x10
    #define WK2XXX_UT4RST 0x08
    #define WK2XXX_UT3RST 0x04
    #define WK2XXX_UT2RST 0x02
    #define WK2XXX_UT1RST 0x01
    //GIER
    #define WK2XXX_UT4IE 0x08
    #define WK2XXX_UT3IE 0x04
    #define WK2XXX_UT2IE 0x02
    #define WK2XXX_UT1IE 0x01
    //GIFR
    #define WK2XXX_UT4INT 0x08
    #define WK2XXX_UT3INT 0x04
    #define WK2XXX_UT2INT 0x02
    #define WK2XXX_UT1INT 0x01
    //SPAGE
    #define WK2XXX_SPAGE0 0x00
    #define WK2XXX_SPAGE1 0x01
    //SCR
    #define WK2XXX_SLEEPEN 0x04
    #define WK2XXX_TXEN 0x02
    #define WK2XXX_RXEN 0x01
    //LCR
    #define WK2XXX_BREAK 0x20
    #define WK2XXX_IREN 0x10
    #define WK2XXX_PAEN 0x08
    #define WK2XXX_PAM1 0x04
    #define WK2XXX_PAM0 0x02
    #define WK2XXX_STPL 0x01
    //FCR
    //SIER
    #define WK2XXX_FERR_IEN 0x80
    #define WK2XXX_CTS_IEN 0x40
    #define WK2XXX_RTS_IEN 0x20
    #define WK2XXX_XOFF_IEN 0x10
    #define WK2XXX_TFEMPTY_IEN 0x08
    #define WK2XXX_TFTRIG_IEN 0x04
    #define WK2XXX_RXOUT_IEN 0x02
    #define WK2XXX_RFTRIG_IEN 0x01
    //SIFR
    #define WK2XXX_FERR_INT 0x80
    #define WK2XXX_CTS_INT 0x40
    #define WK2XXX_RTS_INT 0x20
    #define WK2XXX_XOFF_INT 0x10
    #define WK2XXX_TFEMPTY_INT 0x08
    #define WK2XXX_TFTRIG_INT 0x04
    #define WK2XXX_RXOVT_INT 0x02
    #define WK2XXX_RFTRIG_INT 0x01
    
    
    //TFCNT
    //RFCNT
    //FSR
    #define WK2XXX_RFOE 0x80
    #define WK2XXX_RFBI 0x40
    #define WK2XXX_RFFE 0x20
    #define WK2XXX_RFPE 0x10
    #define WK2XXX_RDAT 0x08
    #define WK2XXX_TDAT 0x04
    #define WK2XXX_TFULL 0x02
    #define WK2XXX_TBUSY 0x01
    //LSR
    #define WK2XXX_OE 0x08
    #define WK2XXX_BI 0x04
    #define WK2XXX_FE 0x02
    #define WK2XXX_PE 0x01
    //FWCR
    
    uint16_t WK_PortSendData(uint8_t port, const void* buf, uint16_t len);
    uint16_t WK_PortRecvData(uint8_t port, void* buf, uint16_t len);
    void WK_PortInit(uint8_t port, uint32_t fosc, uint32_t baudrate);
    void WK_IRQHandler(void);
    void WK_Rst(void);
    
    #endif /* SRC_WK2XXX_H_ */

##### 源文件 #####

/* * wk2xxx.c * * Created on: Jun 17, 2021 * Author: hello */
    
    #include "wk2xxx.h"
    #include "spi.h"
    
    
    //
    ///
    /// 移植修改区域
    ///
    //
    
    /// HAL库SPI句柄
    #define WK_SPI_Handle (&hspi2)
    
    // 拉低RST引脚
    #define WK_GPIO_RST_L() HAL_GPIO_WritePin(WK2124_RST1_GPIO_Port, WK2124_RST1_Pin, GPIO_PIN_RESET)
    
    // 拉高RST引脚
    #define WK_GPIO_RST_H() HAL_GPIO_WritePin(WK2124_RST1_GPIO_Port, WK2124_RST1_Pin, GPIO_PIN_SET)
    
    // 片选引脚拉低
    #define WK_GPIO_SEL_L() HAL_GPIO_WritePin(WK2124_CS1_GPIO_Port, WK2124_CS1_Pin, GPIO_PIN_RESET)
    
    // 片选引脚拉高
    #define WK_GPIO_SEL_H() HAL_GPIO_WritePin(WK2124_CS1_GPIO_Port, WK2124_CS1_Pin, GPIO_PIN_SET)
    
    
    static void wk_delay_ms(uint32_t nms)
    { 
    	HAL_Delay(nms);
    }
    
    static uint8_t WK_SPI_ReadWriteByte(uint8_t TxData)
    { 
    	uint8_t RxData = 0X00;
    	if (HAL_SPI_TransmitReceive(WK_SPI_Handle, &TxData, &RxData, 1, 10) != HAL_OK)
    	{ 
    		RxData = 0XFF;
    	}
    	return RxData;
    }
    
    
    
    
    //
    ///
    /// 驱动程序代码
    ///
    //
    
    
    
    /// 硬件复位（拉低复位引脚最低10毫秒进行复位）
    void WK_Rst(void)
    { 
    	WK_GPIO_RST_L();
    	wk_delay_ms(50);
    	WK_GPIO_RST_H();
    	wk_delay_ms(50);
    }
    
    void WK_WriteGReg(uint8_t reg, uint8_t value)
    { 
    	WK_GPIO_SEL_L();
    	WK_SPI_ReadWriteByte(reg);
    	WK_SPI_ReadWriteByte(value);
    	WK_GPIO_SEL_H();
    }
    
    uint8_t WK_ReadGReg(uint8_t reg)
    { 
    	uint8_t value = 0X00;
    	WK_GPIO_SEL_L();
    	WK_SPI_ReadWriteByte(0X40 | reg);
    	value = WK_SPI_ReadWriteByte(0X00);
    	WK_GPIO_SEL_H();
    	return value;
    }
    
    void WK_WriteSReg(uint8_t port, uint8_t reg, uint8_t value)
    { 
    	WK_GPIO_SEL_L();
    	WK_SPI_ReadWriteByte(((port - 1) << 4) | reg);
    	WK_SPI_ReadWriteByte(value);
    	WK_GPIO_SEL_H();
    }
    
    uint8_t WK_ReadSReg(uint8_t port, uint8_t reg)
    { 
    	uint8_t value = 0X00;
    	WK_GPIO_SEL_L();
    	WK_SPI_ReadWriteByte(0X40 | ((port - 1) << 4) | reg);
    	value = WK_SPI_ReadWriteByte(0X00);
    	WK_GPIO_SEL_H();
    	return value;
    }
    
    void WK_WriteFIFO(uint8_t port, const void* buf, uint16_t len)
    { 
    	const uint8_t* p = (const uint8_t *)buf;
    	WK_GPIO_SEL_L();
    	WK_SPI_ReadWriteByte(0X80 | ((port - 1) << 4));
    	while (len--)
    	{ 
    		WK_SPI_ReadWriteByte(*p++);
    	}
    	WK_GPIO_SEL_H();
    }
    
    void WK_ReadFIFO(uint8_t port, void* buf, uint16_t len)
    { 
    	uint8_t* p = (uint8_t *)buf;
    	WK_GPIO_SEL_L();
    	WK_SPI_ReadWriteByte(0XC0 | ((port - 1) << 4));
    	while (len--)
    	{ 
    		*p++ = WK_SPI_ReadWriteByte(0X00);
    	}
    	WK_GPIO_SEL_H();
    }
    
    void WK_PortCalcBaudrate(uint32_t fosc, uint32_t baudrate, uint8_t* BAUD0, uint8_t* BAUD1, uint8_t* PRES)
    { 
    	float value = (float)fosc / (float)(baudrate << 4);
    	*BAUD0 = (((uint32_t)value) - 1) & 0XFF;
    	*BAUD1 = ((((uint32_t)value) - 1) >> 8) & 0XFF;
    	*PRES  = ((uint32_t)(value * 10)) % 10;
    }
    
    uint16_t WK_PortSendData(uint8_t port, const void* buf, uint16_t len)
    { 
    	uint8_t  state = 0;
    	uint16_t nsend = 0;
    	state = WK_ReadSReg(port, WK2XXX_FSR);
    	if (state & WK2XXX_TFULL)                    // 发送FIFO满
    	{ 
    		nsend = 0;
    	} else
    	{ 
    		state = WK_ReadSReg(port, WK2XXX_TFCNT); // 读取发送FIFO已用空间
    		nsend = 256 - state;
    		nsend = nsend >= len ? len : nsend;
    		WK_WriteFIFO(port, buf, nsend);          // 将待发送的数据写入FIFO
    	}
    	return nsend;                                // 返回实际发送成功的数据量
    }
    
    uint16_t WK_PortRecvData(uint8_t port, void* buf, uint16_t len)
    { 
    	uint8_t state = 0;
    	uint8_t nread = 0;
    	state = WK_ReadSReg(port, WK2XXX_FSR);
    	if (state & WK2XXX_RDAT)                      // 接收FIFO非空
    	{ 
    		nread = WK_ReadSReg(port, WK2XXX_RFCNT);  // 查询FIFO中的数据量
    		nread = len >= nread ? nread : len;
    		WK_ReadFIFO(port, buf, nread);            // 读取FIFO中的数据
    	}
    	return nread;                                 // 返回实际读取到的数据量
    }
    
    void WK_PortInit(uint8_t port, uint32_t fosc, uint32_t baudrate)
    { 
    	uint8_t BAUD0 = 0, BAUD1 = 0, PRES = 0, value = 0, ret = 0;
    
    	//
    	// 使能子串口时钟
    	//
    	value = WK_ReadGReg(WK2XXX_GENA);
    	value |= (1 << (port - 1));
    	WK_WriteGReg(WK2XXX_GENA, value);
    	ret = WK_ReadGReg(WK2XXX_GENA);
    
    	//
    	// 软件复位子串口
    	//
    	value = WK_ReadGReg(WK2XXX_GRST);
    	value |= (1 << (port - 1));
    	WK_WriteGReg(WK2XXX_GRST, value);
    	ret = WK_ReadGReg(WK2XXX_GRST);
    
    	//
    	// 使能子串口总中断
    	//
    	value = WK_ReadGReg(WK2XXX_GIER);
    	value |= (1 << (port - 1));
    	WK_WriteGReg(WK2XXX_GIER, value);
    	ret = WK_ReadGReg(WK2XXX_GIER);
    
    	//
    	// 使能子串口FIFO相关中断
    	//
    	value = WK_ReadSReg(port, WK2XXX_SIER);
    	value |= WK2XXX_RFTRIG_IEN;                  // 接收FIFO触点中断
    // value |= WK2XXX_TFTRIG_IEN; // 发送FIFO触点中断
    // value |= WK2XXX_RXOUT_IEN; // 接收FIFO超时中断
    	WK_WriteSReg(port, WK2XXX_SIER, value);
    	ret = WK_ReadSReg(port, WK2XXX_SIER);
    
    	//
    	// 设置FCR寄存器
    	//
    	value = 0;
    	value |= (1 << 0);  // 复位接收FIFO
    	value |= (1 << 1);  // 复位发送FIFO
    	value |= (1 << 2);  // 使能接收FIFO(这一步必须)
    	value |= (1 << 3);  // 使能发送FIFO(这一步必须)
    	value |= (0 << 4);  // 设置接收FIFO触点固定为8字节
    	value |= (0 << 6);  // 设置发送FIFO触点固定为8字节
    	WK_WriteSReg(port, WK2XXX_FCR, value);
    	ret = WK_ReadSReg(port, WK2XXX_FCR);
    
    	//
    	// 切换到page1设置中断触点和波特率
    	//
    	WK_WriteSReg(port, WK2XXX_SPAGE, 1);
    	ret = WK_ReadSReg(port, WK2XXX_SPAGE);
    
    	WK_WriteSReg(port, WK2XXX_RFTL, 10);      // 设置接收触点为10个字节
    	ret = WK_ReadSReg(port, WK2XXX_RFTL);
    
    	WK_WriteSReg(port, WK2XXX_TFTL, 10);      // 设置发送触点为10个字节
    	ret = WK_ReadSReg(port, WK2XXX_TFTL);
    
    	WK_PortCalcBaudrate(fosc, baudrate, &BAUD0, &BAUD1, &PRES);  // 计算波特率
    
    	WK_WriteSReg(port, WK2XXX_BAUD1, BAUD1);  // 设置BAUD1
    	ret = WK_ReadSReg(port, WK2XXX_BAUD1);
    
    	WK_WriteSReg(port, WK2XXX_BAUD0, BAUD0);  // 设置BAUD0
    	ret = WK_ReadSReg(port, WK2XXX_BAUD0);
    
    	WK_WriteSReg(port, WK2XXX_PRES, PRES);    // 设置PRES
    	ret = WK_ReadSReg(port, WK2XXX_PRES);
    
    	//
    	// 切换回page0
    	//
    	WK_WriteSReg(port, WK2XXX_SPAGE, 0);
    	ret = WK_ReadSReg(port, WK2XXX_SPAGE);
    
    	//
    	// 使能子串口收发
    	//
    	value = WK_ReadSReg(port, WK2XXX_SCR);
    	value |= WK2XXX_TXEN;
    	value |= WK2XXX_RXEN;
    	WK_WriteSReg(port, WK2XXX_SCR, value);
    	ret = WK_ReadSReg(port, WK2XXX_SCR);
    }
    
    
    // 如果irq引脚接入了单片机的外部中断引脚，将该函数放入外部中断处理函数内。
    // 对于WK2124所开启的中断可以这么处理：
    void WK_IRQHandler(void)
    { 
    	int i = 0;
    	uint8_t GIFR = 0, SIFR = 0;
    
    	// 读取子串口全局中断寄存器
    	GIFR = WK_ReadGReg(WK2XXX_GIFR);
    
    	// 查询4个子串口是否发生中断
    	for (i = 0; i < 4; i++)
    	{ 
    		if ((GIFR >> i) & 0X01)
    		{ 
    			SIFR = WK_ReadSReg((i + 1), WK2XXX_SIFR);
    
    			// 有接收FIFO触点中断
    			if (SIFR & WK2XXX_RFTRIG_INT)
    			{ 
    				// 调用WK_PortRecvData接收数据
    			}
    
    			// 有接收FIFO超时中断
    			if (SIFR & WK2XXX_RXOVT_INT)
    			{ 
    
    			}
    
    			// 有发送FIFO触点中断
    			if (SIFR & WK2XXX_TFTRIG_INT)
    			{ 
    
    			}
    
    			// 有发送FIFO空中断
    			if (SIFR & WK2XXX_TFEMPTY_INT)
    			{ 
    
    			}
    
    			// 有接收FIFO数据错误中断
    			if (SIFR & WK2XXX_FERR_INT)
    			{ 
    
    			}
    		}
    	}
    }
    
    /* int main() { int nrecv = 0; uint8_t buffer[256]; // 硬件复位一下 WK_Rst(); // 初始化四个端口 WK_PortInit(1, 11059200, 9600); // WK2124晶振我用的是11.0592MHz的，这个值根据实际进行修改 WK_PortInit(2, 11059200, 9600); WK_PortInit(3, 11059200, 9600); WK_PortInit(4, 11059200, 9600); // 发送数据 WK_PortSendData(1, "helloworld\r\n", 12); WK_PortSendData(2, "helloworld\r\n", 12); WK_PortSendData(3, "helloworld\r\n", 12); WK_PortSendData(4, "helloworld\r\n", 12); // 接收数据，轮训方式 nrecv = WK_PortRecvData(1, buffer, sizeof(buffer)); if(nrecv != 0) { // 处理数据 } } */

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