GD32E230C8T6《调试篇》之 (硬件) IIC通信 + GN1650驱动芯片 + 4位8段数码管显示(成功)

GD32E230C8T6《调试篇》之 (硬件) IIC通信 + GN1650驱动芯片 + 4位8段数码管显示(成功)

  • 前言
  • 代码
    • 1)基础版
    • 2)升级版1.0(+超时检测timeout)
    • 3)升级版2.0(+超时检测timeout + goto 超时处理 + 清寄存器标志)
  • 波形图
    • 测试工具:逻辑分析仪(接线如图)
    • 实验现象
  • 总结

前言

之前调试失败的主要原因找到了,i2c_data_transmit(I2C0,Address); 不能这样传送从机的地址,我是受了软件IIC的影响,以为连续送两次就行;必须用下面的语句传送从机地址,i2c_data_transmit是用来传数据的;

//	/* send slave address to I2C bus*/
//    i2c_master_addressing(I2C0,I2C1_SLAVE_ADDRESS7,I2C_RECEIVER);
//	/* wait until ADDSEND bit is set*/
//    while(!i2c_flag_get(I2C0, I2C_FLAG_ADDSEND));
//	/* clear ADDSEND bit */
//    i2c_flag_clear(I2C0, I2C_FLAG_ADDSEND);

代码

1)基础版

#include "gd32e23x_i2c.h"
#include "gd32e23x.h"
#include "gd32e23x_it.h"
#include 
#include 
#include 
#define TIMEOUT 50
const LEDENCODE[] = {0x03F,0x006,0x05B,0x04F,0x066,0x06D,0x07D,0x007,0x07F,0x06F};

uint8_t i;

void myGPIO_init(void) 
{
	 /* enable GPIOB clock */
	 rcu_periph_clock_enable(RCU_GPIOA);	
	
	 gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_2MHZ,GPIO_PIN_0);//PB6_42  I2C0_SCL GPIO_OTYPE_PP推挽输出
	 gpio_mode_set(GPIOA, GPIO_MODE_OUTPUT, GPIO_PUPD_PULLUP, GPIO_PIN_0);	
}

//主函数处理
int main(void)
{
	systick_config();
		
	myGPIO_init();
	
	delay_ms(10);
 	
	i2c_init();

    while(1)
	{
		gpio_bit_set(GPIOA,GPIO_PIN_0); //PA0测试脚
		delay_ms(25);
		gpio_bit_reset(GPIOA,GPIO_PIN_0);
		delay_ms(25);
		GN1650_Show();
	}
 
}

/********** 数码管显示 **********/
void  GN1650_Show(void)
{	
	static uint16_t value=0;
	
	GN1650_Wrt_RAM(0x68,LEDENCODE[value/1000%10]);//high //0x48 系统指令  0x41//4级亮度 8段显示 显示开
	GN1650_Wrt_RAM(0x6A,LEDENCODE[value/100%10]); //| LEDDOT);
	GN1650_Wrt_RAM(0x6C,LEDENCODE[value/10%10]);
	GN1650_Wrt_RAM(0x6E,LEDENCODE[value%10]); //low
	
	GN1650_Wrt_RAM(0x48,0x01);	
	value++;
	if(value>9999) value=0;	
} 

void GN1650_Wrt_RAM(uint8_t Address,uint8_t Data)
{	
	/****  使用了I2C0(主模式)写功能 ****/
	
	/* wait until I2C bus is idle */
    while(  i2c_flag_get(I2C0, I2C_FLAG_I2CBSY));//如果I2C0繁忙,空等
	
	/* send a start condition to I2C bus */
	i2c_start_on_bus(I2C0);                    // 在I2C0上生成一个起始位
	/* wait until SBSEND bit is set */
    while( !i2c_flag_get(I2C0, I2C_FLAG_SBSEND)); // 如果起始位还没有发送,空等

	i2c_master_addressing(I2C0, Address, I2C_TRANSMITTER); //cmd
	while( !i2c_flag_get(I2C0, I2C_FLAG_ADDSEND)); //while(!i2c_flag_get(I2C0, I2C_FLAG_TBE));
	i2c_flag_clear(I2C0, I2C_FLAG_ADDSEND);
	
    /* wait until the RBNE bit is set */	
	i2c_data_transmit(I2C0,Data);	//data
	while( !i2c_flag_get(I2C0, I2C_FLAG_TBE));
	
	/* send a stop condition to I2C bus*/
    i2c_stop_on_bus(I2C0);	
	while( I2C_CTL0(I2C0)&0x200);	
	
	return; //ok	
}

/*!
    \brief      cofigure the I2C0 interfaces
*/

void i2c_init(void)	
{
	 i2c_deinit(I2C0);
	
	 /* enable GPIOB clock */
	 rcu_periph_clock_enable(RCU_GPIOB);	
	 /* enable I2C0 clock */
	 rcu_periph_clock_enable(RCU_I2C0);
	
	 /* connect PB6 to I2C0_SCL */
	 gpio_af_set(GPIOB,GPIO_AF_1,GPIO_PIN_6);
	 /* connect PB7 to I2C0_SDA */
	 gpio_af_set(GPIOB,GPIO_AF_1,GPIO_PIN_7);
	
	 gpio_output_options_set(GPIOB, GPIO_OTYPE_OD, GPIO_OSPEED_2MHZ,GPIO_PIN_6);//PB6_42  I2C0_SCL 
	 gpio_mode_set(GPIOB, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_6);
	
	 gpio_output_options_set(GPIOB, GPIO_OTYPE_OD, GPIO_OSPEED_2MHZ,GPIO_PIN_7);//PB7_43  I2C0_SDA
	 gpio_mode_set(GPIOB, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_7);
			
	 /* configure I2C0 clock */
	 i2c_clock_config(I2C0,1000000,I2C_DTCY_2);//可以跑到1MHz
	 /* configure I2C0 address */
	 //i2c_mode_addr_config(I2C0,I2C_I2CMODE_ENABLE,I2C_ADDFORMAT_7BITS,0);//GN1650每一位都有一个地址,规格书没有写GN1650的地址

	 /* enable acknowledge */
	 i2c_ack_config(I2C0,I2C_I2CMODE_ENABLE);
	 /* enable I2C0 */
	 i2c_enable(I2C0);	
}

2)升级版1.0(+超时检测timeout)

不要一直等标志位,等不到就执行下一条语句

#define TIMEOUT 50
const LEDENCODE[] = {0x03F,0x006,0x05B,0x04F,0x066,0x06D,0x07D,0x007,0x07F,0x06F};

uint8_t i;

void myGPIO_init(void)
{
	 /* enable GPIOB clock */
	 rcu_periph_clock_enable(RCU_GPIOA);	
		
	 gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_2MHZ,GPIO_PIN_0);//PB6_42  I2C0_SCL GPIO_OTYPE_PP推挽输出
	 gpio_mode_set(GPIOA, GPIO_MODE_OUTPUT, GPIO_PUPD_PULLUP, GPIO_PIN_0);	
}


//主函数
int main(void)
{
	systick_config();
		
	myGPIO_init();
	
	delay_ms(10);
 	
	i2c_init();

    while(1)
	{
		gpio_bit_set(GPIOA,GPIO_PIN_0);
		delay_ms(25);
		gpio_bit_reset(GPIOA,GPIO_PIN_0);
		delay_ms(25);
		GN1650_Show();
	}
 
}

/********** 数码管显示 **********/
void  GN1650_Show(void)
{	
	static uint16_t value=0;
	
	GN1650_Wrt_RAM(0x68,LEDENCODE[value/1000%10]);//high //0x48 系统指令  0x41//4级亮度 8段显示 显示开
	GN1650_Wrt_RAM(0x6A,LEDENCODE[value/100%10]); //| LEDDOT);
	GN1650_Wrt_RAM(0x6C,LEDENCODE[value/10%10]);
	GN1650_Wrt_RAM(0x6E,LEDENCODE[value%10]); //low
	
	GN1650_Wrt_RAM(0x48,0x01);
	
	value++;
	if(value>9999) value=0;
	
} 


void GN1650_Wrt_RAM(uint8_t Address,uint8_t Data)
{
	uint16_t timeout;

	
	/****  使用了I2C0(主模式)写功能 ****/
	/* wait until I2C bus is idle */

	timeout=TIMEOUT;
    while(timeout-- && i2c_flag_get(I2C0, I2C_FLAG_I2CBSY));
		
	/* send a start condition to I2C bus */
	i2c_start_on_bus(I2C0);                    // 在I2C0上生成一个起始位
	/* wait until SBSEND bit is set */
	timeout=TIMEOUT;
    while(timeout-- && !i2c_flag_get(I2C0, I2C_FLAG_SBSEND)); // 如果起始位还没有发送,空等

	
//	/* send slave address to I2C bus*/
//    i2c_master_addressing(I2C0,I2C1_SLAVE_ADDRESS7,I2C_RECEIVER);
//	/* wait until ADDSEND bit is set*/
//    while(!i2c_flag_get(I2C0, I2C_FLAG_ADDSEND));
//	/* clear ADDSEND bit */
//    i2c_flag_clear(I2C0, I2C_FLAG_ADDSEND);


	i2c_master_addressing(I2C0, Address, I2C_TRANSMITTER); //cmd
	timeout=TIMEOUT;
	while(timeout-- && !i2c_flag_get(I2C0, I2C_FLAG_ADDSEND)); //while(!i2c_flag_get(I2C0, I2C_FLAG_TBE));
	i2c_flag_clear(I2C0, I2C_FLAG_ADDSEND);
	

    /* wait until the RBNE bit is set */	
	i2c_data_transmit(I2C0,Data);	//data
	timeout=TIMEOUT;
	while(timeout-- && !i2c_flag_get(I2C0, I2C_FLAG_TBE));
	
	/* send a stop condition to I2C bus*/
    i2c_stop_on_bus(I2C0);	
	timeout=TIMEOUT;
	while(timeout-- && I2C_CTL0(I2C0)&0x200);	
	
	return; //ok
	
}

/*!
    \brief      cofigure the I2C0 interfaces
*/

void i2c_init(void)	
{
	 i2c_deinit(I2C0);
	
	 /* enable GPIOB clock */
	 rcu_periph_clock_enable(RCU_GPIOB);	
	 /* enable I2C0 clock */
	 rcu_periph_clock_enable(RCU_I2C0);
	
	 /* connect PB6 to I2C0_SCL */
	 gpio_af_set(GPIOB,GPIO_AF_1,GPIO_PIN_6);
	 /* connect PB7 to I2C0_SDA */
	 gpio_af_set(GPIOB,GPIO_AF_1,GPIO_PIN_7);
	
	 gpio_output_options_set(GPIOB, GPIO_OTYPE_OD, GPIO_OSPEED_2MHZ,GPIO_PIN_6);//PB6_42  I2C0_SCL 
	 gpio_mode_set(GPIOB, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_6);
	
	 gpio_output_options_set(GPIOB, GPIO_OTYPE_OD, GPIO_OSPEED_2MHZ,GPIO_PIN_7);//PB7_43  I2C0_SDA
	 gpio_mode_set(GPIOB, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_7);
			
	 /* configure I2C0 clock */
	 i2c_clock_config(I2C0,1000000,I2C_DTCY_2);
	 /* configure I2C0 address */
	 //i2c_mode_addr_config(I2C0,I2C_I2CMODE_ENABLE,I2C_ADDFORMAT_7BITS,0);

	 /* enable acknowledge */
	 i2c_ack_config(I2C0,I2C_I2CMODE_ENABLE);
	 /* enable I2C0 */
	 i2c_enable(I2C0);	
}

3)升级版2.0(+超时检测timeout + goto 超时处理 + 清寄存器标志)

超时就不做了,

#define TIMEOUT 50
const LEDENCODE[] = {0x03F,0x006,0x05B,0x04F,0x066,0x06D,0x07D,0x007,0x07F,0x06F};

uint8_t i;

void myGPIO_init(void)
{
	 /* enable GPIOB clock */
	 rcu_periph_clock_enable(RCU_GPIOA);	
		
	 gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_2MHZ,GPIO_PIN_0);//PB6_42  I2C0_SCL GPIO_OTYPE_PP推挽输出
	 gpio_mode_set(GPIOA, GPIO_MODE_OUTPUT, GPIO_PUPD_PULLUP, GPIO_PIN_0);	
}


//主函数处理
int main(void)
{
	systick_config();
		
	myGPIO_init();
	
	delay_ms(10);
 	
	i2c_init();

    while(1)
	{
		gpio_bit_set(GPIOA,GPIO_PIN_0);
		delay_ms(25);
		gpio_bit_reset(GPIOA,GPIO_PIN_0);
		delay_ms(25);
		GN1650_Show();
	}
 
}

/********** 数码管显示 **********/
void  GN1650_Show(void)
{	
	static uint16_t value=0;
	
	GN1650_Wrt_RAM(0x68,LEDENCODE[value/1000%10]);//high //0x48 系统指令  0x41//4级亮度 8段显示 显示开
	GN1650_Wrt_RAM(0x6A,LEDENCODE[value/100%10]); //| LEDDOT);
	GN1650_Wrt_RAM(0x6C,LEDENCODE[value/10%10]);
	GN1650_Wrt_RAM(0x6E,LEDENCODE[value%10]); //low
	
	GN1650_Wrt_RAM(0x48,0x01);
	
	value++;
	if(value>9999) value=0;	
} 

void GN1650_Wrt_RAM(uint8_t Address,uint8_t Data)
{
	uint16_t timeout;
	
	/****  使用了I2C0(主模式)写功能 ****/
	/* wait until I2C bus is idle */

	timeout=TIMEOUT;
    while(timeout-- && i2c_flag_get(I2C0, I2C_FLAG_I2CBSY));//如果I2C0繁忙,空等
	if(timeout==0) goto end_1;
	
	/* send a start condition to I2C bus */
	i2c_start_on_bus(I2C0);                    // 在I2C0上生成一个起始位
	/* wait until SBSEND bit is set */
	timeout=TIMEOUT;
    while(timeout-- && !i2c_flag_get(I2C0, I2C_FLAG_SBSEND)); // 如果起始位还没有发送,空等
	if(timeout==0) goto end_1;

	i2c_master_addressing(I2C0, Address, I2C_TRANSMITTER); //cmd
	timeout=TIMEOUT;
	while(timeout-- && !i2c_flag_get(I2C0, I2C_FLAG_ADDSEND)); //while(!i2c_flag_get(I2C0, I2C_FLAG_TBE));
	i2c_flag_clear(I2C0, I2C_FLAG_ADDSEND);
	
    /* wait until the RBNE bit is set */	
	i2c_data_transmit(I2C0,Data);	//data
	timeout=TIMEOUT;
	while(timeout-- && !i2c_flag_get(I2C0, I2C_FLAG_TBE));
	if(timeout==0) goto end_1;
	
	/* send a stop condition to I2C bus*/
    i2c_stop_on_bus(I2C0);	
	timeout=TIMEOUT;
	while(timeout-- && I2C_CTL0(I2C0)&0x200);	
	if(timeout==0) goto end_1;
	
	return; //ok
	
	end_1: //wrong 
	i2c_init();	//IIc wrong lets iic init
}

/*!
    \brief      cofigure the I2C0 interfaces
*/

void i2c_init(void)	
{
	 i2c_deinit(I2C0);
	
	 /* enable GPIOB clock */
	 rcu_periph_clock_enable(RCU_GPIOB);	
	 /* enable I2C0 clock */
	 rcu_periph_clock_enable(RCU_I2C0);
	
	 /* connect PB6 to I2C0_SCL */
	 gpio_af_set(GPIOB,GPIO_AF_1,GPIO_PIN_6);
	 /* connect PB7 to I2C0_SDA */
	 gpio_af_set(GPIOB,GPIO_AF_1,GPIO_PIN_7);
	
	 gpio_output_options_set(GPIOB, GPIO_OTYPE_OD, GPIO_OSPEED_2MHZ,GPIO_PIN_6);//PB6_42  I2C0_SCL 
	 gpio_mode_set(GPIOB, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_6);
	
	 gpio_output_options_set(GPIOB, GPIO_OTYPE_OD, GPIO_OSPEED_2MHZ,GPIO_PIN_7);//PB7_43  I2C0_SDA
	 gpio_mode_set(GPIOB, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_7);
			
	 /* configure I2C0 clock */
	 i2c_clock_config(I2C0,1000000,I2C_DTCY_2);
	 /* configure I2C0 address */
	 //i2c_mode_addr_config(I2C0,I2C_I2CMODE_ENABLE,I2C_ADDFORMAT_7BITS,0);

	 /* enable acknowledge */
	 i2c_ack_config(I2C0,I2C_I2CMODE_ENABLE);
	 /* enable I2C0 */
	 i2c_enable(I2C0);	

	/*** 清寄存器标志,IIC死掉后重启,提高抗干扰能力 ***/
	 i2c_flag_clear(I2C0, I2C_FLAG_ADDSEND);
	 i2c_flag_clear(I2C0, I2C_FLAG_SMBTO);
	 i2c_flag_clear(I2C0, I2C_FLAG_AERR);
	 i2c_flag_clear(I2C0, I2C_FLAG_BERR);

}

波形图

只点亮一位数码管;0xFF是显示的数据;

	GN1650_Wrt_RAM(0x68,0xFF);//high //0x48 系统指令  0x41//4级亮度 8段显示 显示开
	GN1650_Wrt_RAM(0x48,0x01);	

GD32E230C8T6《调试篇》之 (硬件) IIC通信 + GN1650驱动芯片 + 4位8段数码管显示(成功)_第1张图片
绿色就是测试电平,紫色D7是时钟,黄色D4是数据,绿色点是START,橙色点是STOP;放大后;
GD32E230C8T6《调试篇》之 (硬件) IIC通信 + GN1650驱动芯片 + 4位8段数码管显示(成功)_第2张图片
GD32E230C8T6《调试篇》之 (硬件) IIC通信 + GN1650驱动芯片 + 4位8段数码管显示(成功)_第3张图片
GN1650的规格书,SCL高电平时传数据;SCL第九位ACK,SDA低电平;0110 1000转成16进制=68H;1111 1111转成16进制=FFH;0x48和0x01是同样的分析方法;这样可以检验数据传输正确与否;逻辑分析仪的波形图和GN1650的时序图是否对应的上;

GD32E230C8T6《调试篇》之 (硬件) IIC通信 + GN1650驱动芯片 + 4位8段数码管显示(成功)_第4张图片
GD32E230C8T6《调试篇》之 (硬件) IIC通信 + GN1650驱动芯片 + 4位8段数码管显示(成功)_第5张图片

测试工具:逻辑分析仪(接线如图)

除了CLK、GND,找其他通道连接数码管的SCL和SDA,GND接数码管的负极;
测试脚只输出高低电平;
GD32E230C8T6《调试篇》之 (硬件) IIC通信 + GN1650驱动芯片 + 4位8段数码管显示(成功)_第6张图片

实验现象

GN1650

总结

花了半天搞定,所以不能只写代码,不看芯片规格书;也不能只看规格书,不用代码验证;
最后,连续插拔数码管几十次,硬件IIC确实容易死掉(芯片没有死,因为我的测试脚有高低电平输出),只有重新上电运行;
以上就是使用GN1650的过程。

如有不清楚的可以看看《调试篇》的三篇IIC合集 

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