Solar collector pump controller based on MCU ARM STM32Fo

Video sample

 

 

Example how get temperature from DS18s20 via UART

int main(void){

int i;

   UART_Config();

while(1){

OW_Reset(USART1);
OW_SendByte(0xCC);              // kreipiames i visus daviklius
OW_SendByte(0x44);             // skaiciuoja temperatura visi davikliai

delay_ms(750);                           // laukiam skaiciavimu

// ***************** T0 *****************************************
OW_Reset(USART1);
OW_SendByte(0x55);              // kreipiames i pirma davikli ID0 {0x10, 0x31, 0x19, 0xCB, 0x02, 0x08, 0x00, 0x3A};

for(i = 0; i < 8; i++){
OW_SendByte(ID0[i]);             // siunciam ID
}

OW_SendByte(0xBE);               // prasom temperaturos duomenu pirmo daviklio
for(i=0; i < 9; i++)                        // nuskaitom temperatura
{
temp[i] = OW_ReadByte();
}

t0 = ((float)temp[0] – 0.25 + ((float)(temp[7] – temp[6]) / (float)temp[7])) /2 ;
if (temp[1] != 0) t0 *= -1;
if ((t0 <=-56) || (t0 >= 126)) t0 = t0_old;
t0_old = t0;

// ***************** T0 END ***********************************

// ***************** T1 *****************************************
OW_Reset(USART1);
OW_SendByte(0x55);                    // kreipiames i antra davikli ID0 {0x10, 0xB1, 0x26, 0xCB, 0x02, 0x08, 0x00, 0x3B};

for(i = 0; i < 8; i++)
{
OW_SendByte(ID1[i]);              // siunciam ID
}

OW_SendByte(0xBE);                  // prasom temperaturos duomenu

for(i=0; i < 9; i++)                           // nuskaitom temperatura
{
temp[i] = OW_ReadByte();
}

t1 = ((float)temp[0] – 0.25 + ((float)(temp[7] – temp[6]) / (float)temp[7])) /2 ;
if (temp[1] != 0) t1 *= -1;

if ((t1 <=-56) || (t1 >= 126)) t1 = t1_old;
t1_old = t1;
// ***************** T1 END ***********************************

}

}

 

void OW_SendByte(uint8_t byte)
{
int i;
for(i=0; i<8; i++)
{
if((byte & (1<<i) ) != 0)
{
SerialPutChar(0xFF);
}else{
SerialPutChar(0x00);
}
}
}

uint8_t OW_ReadByte(void)
{
uint16_t result=0;
int i;

for(i=0; i<8; i++)
{
SerialPutChar(0xFF);
delay_ms(1);
if(USART_ReceiveData(USART1) == 0xFF)
{
result |= (1<<i);
}

}
return result;
}

 

uint8_t OW_Reset(USART_TypeDef* USARTx) {
uint8_t ow_presence;
USART_InitTypeDef USART_InitStructure;
USART_InitStructure.USART_BaudRate = 9600;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl =
USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
USART_Init(USARTx, &USART_InitStructure);

USART_Cmd(USARTx,ENABLE);
delay_ms(100);

USART_ClearFlag(USARTx, USART_FLAG_TC);

USART_SendData(USARTx, 0xF0);
while (USART_GetFlagStatus(USARTx, USART_FLAG_TC) == RESET);
ow_presence = USART_ReceiveData(USARTx);

USART_InitStructure.USART_BaudRate = 115200;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl =
USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
USART_Init(USARTx, &USART_InitStructure);

USART_Cmd(USARTx,ENABLE);
delay_ms(100);

if (ow_presence != 0xF0) {
return 1;
}

return 0;
}

 

void USART_Config(void){

USART_InitTypeDef USART_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

// Peripherial configuration
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE); // Enable GPIO clock
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE); // Enable USART clock

// GPIO configuration (USART2: PB6 Tx, PB7 Rx)
GPIO_PinAFConfig(GPIOB, GPIO_PinSource6, GPIO_AF_0); // Tx6
GPIO_PinAFConfig(GPIOB, GPIO_PinSource7, GPIO_AF_0); // Rx7

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_Level_2; // 10Mhz
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOB, &GPIO_InitStructure);

// USART configuration
USART_InitStructure.USART_BaudRate = 9600;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART1, &USART_InitStructure);

// USART interrupt configuration
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

// Additional configuration
USART_ITConfig(USART1, USART_IT_TXE, DISABLE);
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
USART_ITConfig(USART1, USART_IT_CM, ENABLE);

   USART_Cmd(USART1,ENABLE);

}

 

73! de LY3H