stm32 +lora 测试

只看该作者 · 2019-8-25 17:35

I2C 写一个字节数据
void I2C_WriteByte(uint8_t addr,uint8_t data)
{
while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY));

I2C_GenerateSTART(I2C1, ENABLE);//开启I2C1
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));/*EV5,主模式*/

I2C_Send7bitAddress(I2C1, OLED_ADDRESS, I2C_Direction_Transmitter);//器件地址 -- 默认0x78
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));

I2C_SendData(I2C1, addr);//寄存器地址
while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));

I2C_SendData(I2C1, data);//发送数据
while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));

I2C_GenerateSTOP(I2C1, ENABLE);//关闭I2C1总线
}

只看该作者 · 2019-8-25 17:37

写命令
void WriteCmd(unsigned char I2C_Command)//写命令
{
I2C_WriteByte(0x00, I2C_Command);
}

只看该作者 · 2019-8-25 17:38

写数据
void WriteDat(unsigned char I2C_Data)//写数据
{
I2C_WriteByte(0x40, I2C_Data);
}

只看该作者 · 2019-8-25 17:38

OLED初始化
void OLED_Init(void)
{
SysTick_delay_ms(100); //这里的延时很重要

WriteCmd(0xAE); //display off
WriteCmd(0x20); //Set Memory Addressing Mode
WriteCmd(0x10); //00,Horizontal Addressing Mode;01,Vertical Addressing Mode;10,Page Addressing Mode (RESET);11,Invalid
WriteCmd(0xb0); //Set Page Start Address for Page Addressing Mode,0-7
WriteCmd(0xc8); //Set COM Output Scan Direction
WriteCmd(0x00); //---set low column address
WriteCmd(0x10); //---set high column address
WriteCmd(0x40); //--set start line address
WriteCmd(0x81); //--set contrast control register
WriteCmd(0xff); //亮度调节 0x00~0xff
WriteCmd(0xa1); //--set segment re-map 0 to 127
WriteCmd(0xa6); //--set normal display
WriteCmd(0xa8); //--set multiplex ratio(1 to 64)
WriteCmd(0x3F); //
WriteCmd(0xa4); //0xa4,Output follows RAM content;0xa5,Output ignores RAM content
WriteCmd(0xd3); //-set display offset
WriteCmd(0x00); //-not offset
WriteCmd(0xd5); //--set display clock divide ratio/oscillator frequency
WriteCmd(0xf0); //--set divide ratio
WriteCmd(0xd9); //--set pre-charge period
WriteCmd(0x22); //
WriteCmd(0xda); //--set com pins hardware configuration
WriteCmd(0x12);
WriteCmd(0xdb); //--set vcomh
WriteCmd(0x20); //0x20,0.77xVcc
WriteCmd(0x8d); //--set DC-DC enable
WriteCmd(0x14); //
WriteCmd(0xaf); //--turn on oled panel
}

只看该作者 · 2019-8-25 17:40

设置起始点坐标
void OLED_SetPos(unsigned char x, unsigned char y) //设置起始点坐标
{
WriteCmd(0xb0+y);
WriteCmd(((x&0xf0)>>4)|0x10);
WriteCmd((x&0x0f)|0x01);
}

只看该作者 · 2019-8-25 17:47

全屏填充
void OLED_Fill(unsigned char fill_Data)//全屏填充
{
unsigned char m,n;
for(m=0;m<8;m++)
{
WriteCmd(0xb0+m); //page0-page1
WriteCmd(0x00); //low column start address
WriteCmd(0x10); //high column start address
for(n=0;n<128;n++)
{
WriteDat(fill_Data);
}
}
}

只看该作者 · 2019-8-25 17:47

清屏
void OLED_CLS(void)//清屏
{
OLED_Fill(0x00);
}

只看该作者 · 2019-8-25 17:48

将OLED从休眠中唤醒
void OLED_ON(void)
{
WriteCmd(0X8D);  //设置电荷泵
WriteCmd(0X14);  //开启电荷泵
WriteCmd(0XAF);  //OLED唤醒
}

只看该作者 · 2019-8-25 17:49

让OLED休眠 -- 休眠模式下,OLED功耗不到10uA
void OLED_OFF(void)
{
WriteCmd(0X8D);  //设置电荷泵
WriteCmd(0X10);  //关闭电荷泵
WriteCmd(0XAE);  //OLED休眠
}

只看该作者 · 2019-8-25 17:49

OLED在指定位置显示一个字符
void OLED_ShowChar(unsigned char x,unsigned char y,unsigned char ch,unsigned char TextSize)
{
unsigned c=0,i;
   c = ch - 32;
switch(TextSize)
{
case 1:
      OLED_SetPos(x,y);
      for(i=0;i<6;i++)
WriteDat(F6x8[c][i]);
break;
case 2:
   OLED_SetPos(x,y);
for(i=0;i<8;i++)
WriteDat(F8X16[c*16+i]);
OLED_SetPos(x,y+1);
for(i=0;i<8;i++)
WriteDat(F8X16[c*16+i+8]);
break;
}
}

只看该作者 · 2019-8-25 17:50

OLED在指定位置显示字符串
void OLED_ShowStr(unsigned char x, unsigned char y, unsigned char ch[], unsigned char TextSize)
{
unsigned char c = 0,i = 0,j = 0;
switch(TextSize)
{
case 1:
{
while(ch[j] != '\0')
{
c = ch[j] - 32;
if(x > 126)
{
x = 0;
y++;
}
OLED_SetPos(x,y);
for(i=0;i<6;i++)
WriteDat(F6x8[c][i]);
x += 6;
j++;
}
}break;
case 2:
{
while(ch[j] != '\0')
{
c = ch[j] - 32;
if(x > 120)
{
x = 0;
y++;
}
OLED_SetPos(x,y);
for(i=0;i<8;i++)
WriteDat(F8X16[c*16+i]);
OLED_SetPos(x,y+1);
for(i=0;i<8;i++)
WriteDat(F8X16[c*16+i+8]);
x += 8;
j++;
}
}break;
}
}

只看该作者 · 2019-8-25 17:51

OLED在指定位置显示汉子
void OLED_ShowCN(unsigned char x, unsigned char y, unsigned char N)
{
unsigned char wm=0;
unsigned int adder=32*N;
OLED_SetPos(x , y);
for(wm = 0;wm < 16;wm++)
{
WriteDat(F16x16[adder]);
adder += 1;
}
OLED_SetPos(x,y + 1);
for(wm = 0;wm < 16;wm++)
{
WriteDat(F16x16[adder]);
adder += 1;
}
}

只看该作者 · 2019-8-25 18:02

OLED显示BMP图

void OLED_DrawBMP(unsigned char x0,unsigned char y0,unsigned char x1,unsigned char y1,unsigned char BMP[])
{
unsigned int j=0;
unsigned char x,y;

if(y1%8==0)
y = y1/8;
else
y = y1/8 + 1;
for(y=y0;y<y1;y++)
{
OLED_SetPos(x0,y);
for(x=x0;x<x1;x++)
{
WriteDat(BMP[j++]);
}
}
}

只看该作者 · 2019-8-25 18:05

2. LORA串口部分：
Lora串口2初始化
/****Lora串口2初始化*****/
/*******TXD PA2**********/
/*******RXD PA3**********/
void Lora_USART_Config()
{
  GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef  USART_InitStucture;
NVIC_InitTypeDef NVIC_InitStructure;
//打开GPIOA时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
  //打开串口2外设时钟
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);

//将USART_TX GPIO配置为推挽输出
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
//将USART_RX GPIO配置为浮空输入模式
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

USART_InitStucture.USART_BaudRate = 9600; //波特率
USART_InitStucture.USART_WordLength = USART_WordLength_8b;//数据位
USART_InitStucture.USART_StopBits = USART_StopBits_1;//停止位
USART_InitStucture.USART_Parity = USART_Parity_No;//校验位
USART_InitStucture.USART_HardwareFlowControl =
USART_HardwareFlowControl_None;  //配置硬件流
USART_InitStucture.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART2,&USART_InitStucture);
USART_ITConfig(USART2,USART_IT_RXNE,ENABLE);//是能串口接收中断
USART_Cmd(USART2,ENABLE); //是能串口

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn; //配置串口的中断源
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; //抢占优先级
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; //子优先级
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;  //是能中断
NVIC_Init(&NVIC_InitStructure);
}

只看该作者 · 2019-8-25 18:05

LoRa串口接收中断函数
/****LoRa串口接收中断函数****/
void USART2_IRQHandler(void)
{
  uint8_t Res;
if(USART_GetFlagStatus(USART2,USART_IT_RXNE) != RESET) //接收中断
{
   USART_ClearFlag(USART2, USART_FLAG_RXNE);
   Res = USART_ReceiveData(USART2);  //读取接收的数据
   if(!(LoraUartRxSta&0x8000))    //未接收完成
   {
      if(LoraUartRxSta&0x4000)    //已经接收到0x0d  "\r"
{
   if(Res != 0x0a)
   {
   LoraUartRxSta = 0;       //接收错误
   }
   else                      //接收完成
   {
   LoraUartRxSta |= 0x8000;
   }
}
else                         //还没有接收到0x0d  "\r"
{
   if(Res == 0x0d)
{
LoraUartRxSta |= 0x4000;
}
else
{
   LoraUartRxBuf[LoraUartRxSta&0x3fff] = Res;
LoraUartRxSta++;
}
}
   }
}
}

只看该作者 · 2019-8-25 18:07

//接收数据结构体
typedef struct LoraReceiveBuff
{
uint8_t LoraId[3]; //ID号
uint8_t HumiData[3]; //温度信息
uint8_t TempData[3]; //湿度信息
}LoraReceiveData;

只看该作者 · 2019-8-25 18:07

void LoraTestData()
{

OLED_ShowStr(0,0," Node1 ReData",2);
OLED_ShowStr(0,3,"Temp: ",2);
OLED_ShowStr(100,3,"C",2);
OLED_ShowStr(0,6,"Humi: ",2);
OLED_ShowStr(100,6,"H",2);
if(LoraUartRxSta&0x8000)
{
loradata.LoraId[0] = LoraUartRxBuf[0];
loradata.LoraId[1] = LoraUartRxBuf[1];
loradata.LoraId[2] = LoraUartRxBuf[2];
loradata.TempData[0] = LoraUartRxBuf[3];
loradata.TempData[1] = LoraUartRxBuf[4];
loradata.TempData[2] = LoraUartRxBuf[5];
loradata.HumiData[0] = LoraUartRxBuf[6];
loradata.HumiData[1] = LoraUartRxBuf[7];
loradata.HumiData[2] = LoraUartRxBuf[8];
if((loradata.LoraId[0]=='#')&&(loradata.LoraId[1]=='0')&&(loradata.LoraId[2]=='1'))
{
OLED_ShowChar(60,3,loradata.TempData[0],2);
OLED_ShowChar(68,3,loradata.TempData[1],2);
OLED_ShowChar(76,3,loradata.TempData[2],2);
OLED_ShowChar(60,6,loradata.HumiData[0],2);
OLED_ShowChar(68,6,loradata.HumiData[1],2);
OLED_ShowChar(76,6,loradata.HumiData[2],2);
}
LoraUartRxSta =0;
}
}

1万 · 2019-8-26 08:44

SX1278吗？

只看该作者 · 2019-8-26 14:03

goodluck09876 发表于 2019-8-26 08:44
SX1278吗？

是的，正点原子那个Lora模组

1万 · 2019-8-26 14:23

hanzhen654 发表于 2019-8-26 14:03
是的，正点原子那个Lora模组

这个应该是很好用的！你选择PA了吗？就是无线功放？