int main(void)
{
UART_Init();
UART_SendStr("\nSTM32F103RET6 is online.\n");
UART_SendStr("I2C init ... ");
if (!LM75_Init(100000)) UART_SendStr("ready.\n"); else {
UART_SendStr("fail.\n");
UART_SendStr("MCU halted now.\n");
while(1);
}
uint16_t value;
value = LM75_ReadReg(0x00);
UART_SendHex16(value); UART_SendChar('\n');
value = LM75_ReadConf();
UART_SendHex8(value); UART_SendChar('\n');
value = LM75_ReadReg(0x02);
UART_SendHex16(value); UART_SendChar('\n');
value = LM75_ReadReg(0x03);
UART_SendHex16(value); UART_SendChar('\n');
LM75_Shutdown(DISABLE);
int16_t temp = LM75_Temperature();
UART_SendInt(temp / 10); UART_SendChar('.');
temp %= 10;
if (temp < 0) temp *= -1;
UART_SendInt(temp % 10); UART_SendStr("C\n");
while(1);
}
/**
* @brief Configure the LM75_I2C.
* @param None
* @retval None
*/
void LM75_Config(void)
{
LM75_StructInit ();
LM75_Init();
}
/**
* @brief Main program.
* @param None
* @retval None
*/
int main(void)
{
/*!< At this stage the microcontroller clock setting is already configured,
this is done through SystemInit() function which is called from startup
file (startup_stm32f0xx.s) before to branch to application main.
To reconfigure the default setting of SystemInit() function, refer to
system_stm32f0xx.c file
*/
uint32_t index = 0;
/* NVIC Configuration */
NVIC_Config();
/* Initialize the LCD */
STM320518_LCD_Init();
/* Initialize the Temperature Sensor */
LM75_Init();
if (LM75_GetStatus() == SUCCESS)
{
/* Clear the LCD */
LCD_Clear(LCD_COLOR_WHITE);
/* Set the Back Color */
LCD_SetBackColor(LCD_COLOR_BLUE);
/* Set the Text Color */
LCD_SetTextColor(LCD_COLOR_GREEN);
LCD_DisplayStringLine(LCD_LINE_0, " Temperature ");
/* Configure the Temperature sensor device STLM75:
- Thermostat mode Interrupt
- Fault tolerance: 00
*/
LM75_WriteConfReg(0x02);
/* Configure the THYS and TOS in order to use the SMbus alert interrupt */
LM75_WriteReg(LM75_REG_THYS, TEMPERATURE_THYS << 8); /*31°C*/
LM75_WriteReg(LM75_REG_TOS, TEMPERATURE_TOS << 8); /*32°C*/
/* Enables the I2C SMBus Alert feature */
I2C_SMBusAlertCmd(LM75_I2C, ENABLE);
I2C_ClearFlag(LM75_I2C, I2C_FLAG_ALERT);
SMbusAlertOccurred = 0;
/* Enable SMBus Alert interrupt */
I2C_ITConfig(LM75_I2C, I2C_IT_ERRI, ENABLE);
/* Infinite Loop */
while (1)
{
/* Get double of Temperature value */
TempValue = LM75_ReadTemp();
if (TempValue <= 256)
{
/* Positive temperature measured */
TempCelsiusDisplay[7] = '+';
/* Initialize the temperature sensor value*/
TempValueCelsius = TempValue;
}
else
{
/* Negative temperature measured */
TempCelsiusDisplay[7] = '-';
/* Remove temperature value sign */
TempValueCelsius = 0x200 - TempValue;
}
/* Calculate temperature digits in °C */
if ((TempValueCelsius & 0x01) == 0x01)
{
TempCelsiusDisplay[12] = 0x05 + 0x30;
TempFahrenheitDisplay[12] = 0x05 + 0x30;
}
else
{
TempCelsiusDisplay[12] = 0x00 + 0x30;
TempFahrenheitDisplay[12] = 0x00 + 0x30;
}
TempValueCelsius >>= 1;
TempCelsiusDisplay[8] = (TempValueCelsius / 100) + 0x30;
TempCelsiusDisplay[9] = ((TempValueCelsius % 100) / 10) + 0x30;
TempCelsiusDisplay[10] = ((TempValueCelsius % 100) % 10) + 0x30;
if (TempValue > 256)
{
if (((9 * TempValueCelsius) / 5) <= 32)
{
/* Convert temperature °C to Fahrenheit */
TempValueFahrenheit = abs (32 - ((9 * TempValueCelsius) / 5));
/* Calculate temperature digits in °F */
TempFahrenheitDisplay[8] = (TempValueFahrenheit / 100) + 0x30;
TempFahrenheitDisplay[9] = ((TempValueFahrenheit % 100) / 10) + 0x30;
TempFahrenheitDisplay[10] = ((TempValueFahrenheit % 100) % 10) + 0x30;
/* Positive temperature measured */
TempFahrenheitDisplay[7] = '+';
}
else
{
/* Convert temperature °C to Fahrenheit */
TempValueFahrenheit = abs(((9 * TempValueCelsius) / 5) - 32);
/* Calculate temperature digits in °F */
TempFahrenheitDisplay[8] = (TempValueFahrenheit / 100) + 0x30;
TempFahrenheitDisplay[9] = ((TempValueFahrenheit % 100) / 10) + 0x30;
TempFahrenheitDisplay[10] = ((TempValueFahrenheit % 100) % 10) + 0x30;
/* Negative temperature measured */
TempFahrenheitDisplay[7] = '-';
}
}
else
{
/* Convert temperature °C to Fahrenheit */
TempValueFahrenheit = ((9 * TempValueCelsius) / 5) + 32;
/* Calculate temperature digits in °F */
TempFahrenheitDisplay[8] = (TempValueFahrenheit / 100) + 0x30;
TempFahrenheitDisplay[9] = ((TempValueFahrenheit % 100) / 10) + 0x30;
TempFahrenheitDisplay[10] = ((TempValueFahrenheit % 100) % 10) + 0x30;
/* Positive temperature measured */
TempFahrenheitDisplay[7] = '+';
}
/* Display Fahrenheit value on LCD */
for (index = 0; index < 20; index++)
{
LCD_DisplayChar(LCD_LINE_6, (319 - (16 * index)), TempCelsiusDisplay[index]);
LCD_DisplayChar(LCD_LINE_7, (319 - (16 * index)), TempFahrenheitDisplay[index]);
}
if (SMbusAlertOccurred == 1)
{
/* Set the Back Color */
LCD_SetBackColor(LCD_COLOR_BLUE);
/* Set the Text Color */
LCD_SetTextColor(LCD_COLOR_RED);
LCD_DisplayStringLine(LCD_LINE_2, "Warning: Temp exceed");
LCD_DisplayStringLine(LCD_LINE_3, " 32 C ");
}
if (SMbusAlertOccurred == 2)
{
/* Set the Back Color */
LCD_SetBackColor(LCD_COLOR_WHITE);
/* Set the Text Color */
LCD_SetTextColor(LCD_COLOR_WHITE);
LCD_ClearLine(LCD_LINE_2);
LCD_ClearLine(LCD_LINE_3);
SMbusAlertOccurred = 0;
/* Set the Back Color */
LCD_SetBackColor(LCD_COLOR_BLUE);
/* Set the Text Color */
LCD_SetTextColor(LCD_COLOR_GREEN);
}
}
}
/**
* @brief Restore Demonstration context (GPIOs Configurations, peripherals,...).
* @param None
* @retval None
*/
void IDD_Measurement_RestoreContext(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
GPIOA->MODER = GPIOA_MODER;
GPIOB->MODER = GPIOB_MODER;
GPIOC->MODER = GPIOC_MODER;
GPIOD->MODER = GPIOD_MODER;
GPIOE->MODER = GPIOE_MODER;
GPIOH->MODER = GPIOH_MODER;
GPIOA->PUPDR = GPIOA_PUPDR;
GPIOB->PUPDR = GPIOB_PUPDR;
GPIOC->PUPDR = GPIOC_PUPDR;
GPIOD->PUPDR = GPIOD_PUPDR;
GPIOE->PUPDR = GPIOE_PUPDR;
GPIOH->PUPDR = GPIOH_PUPDR;
/* At this stage the system has resumed from STOP mode ---------------------*/
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Line = IDD_WAKEUP_EXTI_LINE;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_InitStructure.EXTI_LineCmd = DISABLE;
EXTI_Init(&EXTI_InitStructure);
/* Enable the EXTI Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = IDD_WAKEUP_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = DISABLE;
NVIC_Init(&NVIC_InitStructure);
/* Configure IDD_CNT_EN pin as output push-pull ----------------------------*/
GPIO_InitStructure.GPIO_Pin = IDD_CNT_EN_PIN;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_Init(IDD_CNT_EN_GPIO_PORT, &GPIO_InitStructure);
/* Allow access to the RTC */
PWR_RTCAccessCmd(ENABLE);
/*!< LSE Enable */
RCC_LSEConfig(RCC_LSE_ON);
/*!< Wait till LSE is ready */
while (RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET)
{}
/*!< LCD Clock Source Selection */
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
/* LCD GLASS Initialization */
LCD_GLASS_Init();
/* GPIO Configuration */
Demo_GPIOConfig();
/* Interrupt Configuration */
Demo_InterruptConfig();
/* Configure the systick */
Demo_SysTickConfig();
/*------------------- Drivers Initialization -------------------------------*/
/* Initialize the LEDs toggling */
Demo_LedShowInit();
/* Initialize the LCD */
STM32L152_LCD_Init();
/* If HSE is not detected at program startup */
if (RCC_GetFlagStatus(RCC_FLAG_HSERDY) == RESET)
{
/* Generate NMI exception */
SCB->ICSR |= SCB_ICSR_NMIPENDSET;
}
/* Initialize Wave player application */
WavePlayer_Init();
/* Initialize the Thermometer application */
LM75_Init();
/* Enable Leds toggling */
Demo_LedShow(ENABLE);
/* COMP2 Configuration */
Demo_COMPConfig();
/* Enable Leds toggling */
Demo_LedShow(ENABLE);
Demo_SysTickConfig();
}
