GD32F310定时器采样MP6050并在彩色LCD上显示波形-32定时器计时

1.开发环境

(1)IAR8.4

(2)MPU6050 1.8寸显示屏

2.软件

(1)MPU6050陀螺仪驱动

i2C配置：

void i2c0_gpio_config(void)

{ rcu_periph_clock_enable(RCU_GPIOB); rcu_periph_clock_enable(RCU_I2C0); gpio_af_set(GPIOB, GPIO_AF_1, GPIO_PIN_6); gpio_af_set(GPIOB, GPIO_AF_1, GPIO_PIN_7); gpio_mode_set(GPIOB, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_6); gpio_output_options_set(GPIOB, GPIO_OTYPE_OD, GPIO_OSPEED_50MHZ, GPIO_PIN_6); gpio_mode_set(GPIOB, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_7); gpio_output_options_set(GPIOB, GPIO_OTYPE_OD, GPIO_OSPEED_50MHZ, GPIO_PIN_7);

}

void i2c_config(void)

{ i2c_clock_config(I2C0, 200000, I2C_DTCY_2); i2c_mode_addr_config(I2C0, I2C_I2CMODE_ENABLE, I2C_ADDFORMAT_7BITS, SlaveAddress); i2c_enable(I2C0); i2c_ack_config(I2C0, I2C_ACK_ENABLE);

}

uint8_t Read_Byte(uint16_t SlaveAddr,uint16_t ReadAddr, uint8_t *DataByte)

{ uint8_t err = 1; i2c_start_on_bus(I2C0); while(!i2c_flag_get(I2C0, I2C_FLAG_SBSEND)); i2c_master_addressing(I2C0, SlaveAddr<<1, I2C_TRANSMITTER); while(!i2c_flag_get(I2C0, I2C_FLAG_ADDSEND)); i2c_flag_clear(I2C0, I2C_FLAG_ADDSEND); while(!i2c_flag_get(I2C0, I2C_FLAG_TBE)); i2c_data_transmit(I2C0, ReadAddr); while(!i2c_flag_get(I2C0, I2C_FLAG_TBE)); i2c_start_on_bus(I2C0); while(!i2c_flag_get(I2C0, I2C_FLAG_SBSEND)); i2c_master_addressing(I2C0, SlaveAddr<<1, I2C_RECEIVER); while(!i2c_flag_get(I2C0, I2C_FLAG_ADDSEND)); i2c_ack_config(I2C0, I2C_ACK_DISABLE); i2c_flag_clear(I2C0, I2C_FLAG_ADDSEND); i2c_stop_on_bus(I2C0); while(!i2c_flag_get(I2C0, I2C_FLAG_RBNE)); *DataByte = i2c_data_receive(I2C0); i2c_ack_config(I2C0, I2C_ACK_ENABLE); err = 0; return err;

}

uint8_t Write_Byte(uint16_t SlaveAddr,uint16_t WriteAddr,uint16_t WriteByte)

{ uint8_t err = 0; i2c_start_on_bus(I2C0); while(!i2c_flag_get(I2C0, I2C_FLAG_SBSEND)); i2c_master_addressing(I2C0, SlaveAddr<<1, I2C_TRANSMITTER); while(!i2c_flag_get(I2C0, I2C_FLAG_ADDSEND)); i2c_flag_clear(I2C0, I2C_FLAG_ADDSEND); while(!i2c_flag_get(I2C0, I2C_FLAG_TBE)); i2c_data_transmit(I2C0, WriteAddr); while(!i2c_flag_get(I2C0, I2C_FLAG_TBE)); i2c_data_transmit(I2C0, WriteByte); while(!i2c_flag_get(I2C0, I2C_FLAG_TBE)); i2c_stop_on_bus(I2C0); return err;

}

陀螺仪初始化：

void mpu6050_init(){

Write_Byte( SlaveAddress, PWR_MGMT_1, 0x00 ); delay_1ms(10); Write_Byte( SlaveAddress, SMPLRT_DIV, 0x07 ); delay_1ms(10); Write_Byte( SlaveAddress, CONFIG, 0x06 ); delay_1ms(10); Write_Byte( SlaveAddress, GYRO_CONFIG, 0x18); delay_1ms(10); Write_Byte( SlaveAddress, ACCEL_CONFIG, 0x01); delay_1ms(10);

}

void GetData(uint16_t SlaveAddr,uint16_t REG_Address,short data[3])

{ uint8_t H=0,L=0; for(int i=0;i<3;i++){ Read_Byte(SlaveAddress, REG_Address+(i*2), &H); Read_Byte( SlaveAddress, REG_Address+(i*2+1),&L); data[i]=(( short)(H<<8))|L; }

(2)LCD驱动

驱动：

void LCD_GPIO_Init(void)

{ rcu_periph_clock_enable(RCU_GPIOA); gpio_mode_set(GPIOA, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3|GPIO_PIN_4|GPIO_PIN_5); gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3|GPIO_PIN_4|GPIO_PIN_5); gpio_bit_set(GPIOA,GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3|GPIO_PIN_4|GPIO_PIN_5);

}

void LCD_Writ_Bus(uint8_t dat)

{ uint8_t i; LCD_CS_Clr(); for(i=0;i<8;i++) { LCD_SCLK_Clr(); if(dat&0x80) { LCD_MOSI_Set(); } else { LCD_MOSI_Clr(); } LCD_SCLK_Set(); dat<<=1; }

LCD_CS_Set();

}

void LCD_WR_DATA8(uint8_t dat)

{ LCD_Writ_Bus(dat);

}

void LCD_WR_DATA(uint16_t dat)

{ LCD_Writ_Bus(dat>>8); LCD_Writ_Bus(dat);

}

void LCD_WR_REG(uint8_t dat)

{ LCD_DC_Clr();//д???? LCD_Writ_Bus(dat); LCD_DC_Set();//д????

}

void LCD_Address_Set(uint16_t x1,uint16_t y1,uint16_t x2,uint16_t y2)

{ if(USE_HORIZONTAL==0) { LCD_WR_REG(0x2a);//?е?????? LCD_WR_DATA(x1+2); LCD_WR_DATA(x2+2); LCD_WR_REG(0x2b);//?е?????? LCD_WR_DATA(y1+1); LCD_WR_DATA(y2+1); LCD_WR_REG(0x2c);//??????д } else if(USE_HORIZONTAL==1) { LCD_WR_REG(0x2a);//?е?????? LCD_WR_DATA(x1+2); LCD_WR_DATA(x2+2); LCD_WR_REG(0x2b);//?е?????? LCD_WR_DATA(y1+1); LCD_WR_DATA(y2+1); LCD_WR_REG(0x2c);//??????д } else if(USE_HORIZONTAL==2) { LCD_WR_REG(0x2a);//?е?????? LCD_WR_DATA(x1+1); LCD_WR_DATA(x2+1); LCD_WR_REG(0x2b);//?е?????? LCD_WR_DATA(y1+2); LCD_WR_DATA(y2+2); LCD_WR_REG(0x2c);//??????д } else { LCD_WR_REG(0x2a);//?е?????? LCD_WR_DATA(x1+1); LCD_WR_DATA(x2+1); LCD_WR_REG(0x2b);//?е?????? LCD_WR_DATA(y1+2); LCD_WR_DATA(y2+2); LCD_WR_REG(0x2c);//??????д }

}

void LCD_Init(void)

{ LCD_GPIO_Init(); LCD_RES_Clr(); delay_1ms(100); LCD_RES_Set(); delay_1ms(100); LCD_BLK_Set(); delay_1ms(100); delay_1ms(120); LCD_WR_REG(0xB1); LCD_WR_DATA8(0x05); LCD_WR_DATA8(0x3C); LCD_WR_DATA8(0x3C); LCD_WR_REG(0xB2); LCD_WR_DATA8(0x05); LCD_WR_DATA8(0x3C); LCD_WR_DATA8(0x3C); LCD_WR_REG(0xB3); LCD_WR_DATA8(0x05); LCD_WR_DATA8(0x3C); LCD_WR_DATA8(0x3C); LCD_WR_DATA8(0x05); LCD_WR_DATA8(0x3C); LCD_WR_DATA8(0x3C); LCD_WR_REG(0xB4); //Dot inversion LCD_WR_DATA8(0x03); LCD_WR_REG(0xC0); LCD_WR_DATA8(0x28); LCD_WR_DATA8(0x08); LCD_WR_DATA8(0x04); LCD_WR_REG(0xC1); LCD_WR_DATA8(0XC0); LCD_WR_REG(0xC2); LCD_WR_DATA8(0x0D); LCD_WR_DATA8(0x00); LCD_WR_REG(0xC3); LCD_WR_DATA8(0x8D); LCD_WR_DATA8(0x2A); LCD_WR_REG(0xC4); LCD_WR_DATA8(0x8D); LCD_WR_DATA8(0xEE); LCD_WR_REG(0xC5); //VCOM LCD_WR_DATA8(0x1A); LCD_WR_REG(0x36); //MX, MY, RGB mode if(USE_HORIZONTAL==0)LCD_WR_DATA8(0x00); else if(USE_HORIZONTAL==1)LCD_WR_DATA8(0xC0); else if(USE_HORIZONTAL==2)LCD_WR_DATA8(0x70); else LCD_WR_DATA8(0xA0); LCD_WR_REG(0xE0); LCD_WR_DATA8(0x04); LCD_WR_DATA8(0x22); LCD_WR_DATA8(0x07); LCD_WR_DATA8(0x0A); LCD_WR_DATA8(0x2E); LCD_WR_DATA8(0x30); LCD_WR_DATA8(0x25); LCD_WR_DATA8(0x2A); LCD_WR_DATA8(0x28); LCD_WR_DATA8(0x26); LCD_WR_DATA8(0x2E); LCD_WR_DATA8(0x3A); LCD_WR_DATA8(0x00); LCD_WR_DATA8(0x01); LCD_WR_DATA8(0x03); LCD_WR_DATA8(0x13); LCD_WR_REG(0xE1); LCD_WR_DATA8(0x04); LCD_WR_DATA8(0x16); LCD_WR_DATA8(0x06); LCD_WR_DATA8(0x0D); LCD_WR_DATA8(0x2D); LCD_WR_DATA8(0x26); LCD_WR_DATA8(0x23); LCD_WR_DATA8(0x27); LCD_WR_DATA8(0x27); LCD_WR_DATA8(0x25); LCD_WR_DATA8(0x2D); LCD_WR_DATA8(0x3B); LCD_WR_DATA8(0x00); LCD_WR_DATA8(0x01); LCD_WR_DATA8(0x04); LCD_WR_DATA8(0x13); //————————————End ST7735S Gamma Sequence—————————–// LCD_WR_REG(0x3A); //65k mode LCD_WR_DATA8(0x05); LCD_WR_REG(0x29); //Display on

}

显示函数：

void LCD_Fill(uint16_t xsta,uint16_t ysta,uint16_t xend,uint16_t yend,uint16_t color)

{ uint16_t i,j; LCD_Address_Set(xsta,ysta,xend-1,yend-1);//?????????Χ for(i=ysta;i

}

void LCD_DrawPoint(uint16_t x,uint16_t y,uint16_t color)

{ LCD_Address_Set(x,y,x,y);//???ù??λ?? LCD_WR_DATA(color);

}

void LCD_DrawLine(uint16_t x1,uint16_t y1,uint16_t x2,uint16_t y2,uint16_t color)

{ uint16_t t; int xerr=0,yerr=0,delta_x,delta_y,distance; int incx,incy,uRow,uCol; delta_x=x2-x1; //???????????? delta_y=y2-y1; uRow=x1;//??????????? uCol=y1; if(delta_x>0)incx=1; //??????????? else if (delta_x==0)incx=0;//????? else {incx=-1;delta_x=-delta_x;} if(delta_y>0)incy=1; else if (delta_y==0)incy=0;//???? else {incy=-1;delta_y=-delta_y;} if(delta_x>delta_y)distance=delta_x; //???????????????? else distance=delta_y; for(t=0;tdistance) { xerr-=distance; uRow+=incx; } if(yerr>distance) { yerr-=distance; uCol+=incy; } }

}

void LCD_DrawRectangle(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2,uint16_t color)

{ LCD_DrawLine(x1,y1,x2,y1,color); LCD_DrawLine(x1,y1,x1,y2,color); LCD_DrawLine(x1,y2,x2,y2,color); LCD_DrawLine(x2,y1,x2,y2,color);

}

void Draw_Circle(uint16_t x0,uint16_t y0,uint8_t r,uint16_t color)

{ int a,b; a=0;b=r; while(a<=b) { LCD_DrawPoint(x0-b,y0-a,color); LCD_DrawPoint(x0+b,y0-a,color); LCD_DrawPoint(x0-a,y0+b,color); LCD_DrawPoint(x0-a,y0-b,color); LCD_DrawPoint(x0+b,y0+a,color); LCD_DrawPoint(x0+a,y0-b,color); LCD_DrawPoint(x0+a,y0+b,color); LCD_DrawPoint(x0-b,y0+a,color); a++; if((a*a+b*b)>(r*r)) { b–; } }

}

void LCD_ShowChar(uint16_t x,uint16_t y,uint8_t num,uint16_t fc,uint16_t bc,uint8_t sizey,uint8_t mode)

{ uint8_t temp,sizex,t,m=0; uint16_t i,TypefaceNum; uint16_t x0=x; sizex=sizey/2; TypefaceNum=(sizex/8+((sizex%8)?1:0))*sizey; num=num- ; LCD_Address_Set(x,y,x+sizex-1,y+sizey-1); for(i=0;i

}

void LCD_ShowString(uint16_t x,uint16_t y,const uint8_t *p,uint16_t fc,uint16_t bc,uint8_t sizey,uint8_t mode)

{ while(*p!=�) { LCD_ShowChar(x,y,*p,fc,bc,sizey,mode); x+=sizey/2; p++; }

}

uint32_t mypow(uint8_t m,uint8_t n)

{ uint32_t result=1; while(n–)result*=m; return result;

}

void LCD_ShowIntNum(uint16_t x,uint16_t y,uint16_t num,uint8_t len,uint16_t fc,uint16_t bc,uint8_t sizey)

{ uint8_t t,temp; uint8_t enshow=0; uint8_t sizex=sizey/2; for(t=0;t

}

void LCD_ShowFloatNum1(uint16_t x,uint16_t y,float num,uint8_t len,uint16_t fc,uint16_t bc,uint8_t sizey)

{ uint8_t t,temp,sizex; uint16_t num1; sizex=sizey/2; num1=num*100; for(t=0;t

}

(3)主函数

void gd_led_config(void);

void gd_led_toggle(void);

int data[128]={0},data2[128]={0},data3[128]={0};

short Acc[3],Gyro[3];

void TIMER2_IRQHandler(void) {

if(SET == timer_interrupt_flag_get(TIMER2, TIMER_INT_FLAG_UP)){ /* clear channel 0 interrupt bit */ timer_interrupt_flag_clear(TIMER2, TIMER_INT_FLAG_UP); GetData(SlaveAddress,ACCEL_XOUT_H,Acc); GetData(SlaveAddress,GYRO_XOUT_H,Gyro); gd_led_toggle(); }

}

void nvic_config(void)

{ nvic_irq_enable(TIMER2_IRQn, 0, 0);

}

void timer_config(void)

{ TIMER2 Configuration: TIMER2CLK = SystemCoreClock/8400(GD32F330)or 10800(GD32F350) = 10KHz. the period is 1s(10000/10000 = 1s). timer_oc_parameter_struct timer_ocinitpara; timer_parameter_struct timer_initpara; /* enable the peripherals clock */ rcu_periph_clock_enable(RCU_TIMER2); /* deinit a TIMER */ timer_deinit(TIMER2); /* initialize TIMER init parameter struct */ timer_struct_para_init(&timer_initpara); /* TIMER2 configuration */ timer_initpara.prescaler = 4999; timer_initpara.alignedmode = TIMER_COUNTER_EDGE; timer_initpara.counterdirection = TIMER_COUNTER_UP; timer_initpara.period = 999; timer_initpara.clockdivision = TIMER_CKDIV_DIV1; timer_init(TIMER2, &timer_initpara); /* clear channel 0 interrupt bit */ timer_interrupt_flag_clear(TIMER2, TIMER_INT_FLAG_UP); /* enable the TIMER interrupt */ timer_interrupt_enable(TIMER2, TIMER_INT_UP); /* enable a TIMER */ timer_enable(TIMER2);

}

int main(void)

{ gd_led_config(); systick_config(); i2c0_gpio_config();

i2c_config();

mpu6050_init(); LCD_Init(); LCD_Fill(0,0,LCD_W,LCD_H,BLACK); //LCD_ShowString(0,0,”Hellow GD32F310G8!”,WHITE,BLUE,12,0); timer_config(); /* configure the TIMER2 interrupt */ nvic_config(); while(1) { for(int i=0;i<128;i++){ LCD_DrawPoint( i, data[i],RED); LCD_DrawPoint( i, data2[i],GREEN); LCD_DrawPoint( i, data3[i],BLUE); } delay_1ms(10); for(int i=0;i<128;i++){ LCD_DrawPoint( i, data[i],BLACK); LCD_DrawPoint( i, data2[i],BLACK); LCD_DrawPoint( i, data3[i],BLACK); } for(int i=0;i<127;i++){ data[i]=data[i+1]; data2[i]=data2[i+1]; data3[i]=data3[i+1]; } data[127]=20+(int)(((float)Gyro[0])/164); data2[127]=60+(int)(((float)Gyro[1])/164); data3[127]=100+(int)(((float)Gyro[2])/164); //char cpd[10]; //sprintf(cpd,”%d”,Acc[0]); //LCD_ShowString(0,0,cpd,WHITE,BLUE,12,0); }

}

void gd_led_config(void)

{ rcu_periph_clock_enable(RCU_GPIOA); gpio_mode_set(GPIOA, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO_PIN_1); gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_1); GPIO_BC(GPIOA) = GPIO_PIN_1;

}

void gd_led_toggle(void)

{ GPIO_TG(GPIOA) = GPIO_PIN_1;

}

3.效果

GD32存在一个问题，用队列缓冲陀螺仪数据时，运行数秒后死机。

审核编辑：刘清