/* Initializes the BMP085 configuration to
* the I2C1 module. Automatically enables interrupts,
* I2C1 module, and the GPIO A Peripheral, and the
* callback application for the BMP085 created by TI.
*
* Input:
* abI2cModule
* Returns:
* none
*
*/
void bmp085Init(uint32_t i2cModule){
if(!bmpI2CInited){
i2cInit(AB_I2C_MODULE_1);
I2CMInit(&bmpI2cModuleInstance, i2cGetBase(i2cModule), i2cGetInterruptID(i2cModule), 0xff, 0xff,
ROM_SysCtlClockGet());
bmpI2CInited = 1;
}
BMP180Init(&bmpAppInstance[bmpStructCounter], &bmpI2cModuleInstance, BMP085_I2C_ADDRESS,
bmp085AppCallback, &bmpAppInstance[bmpStructCounter]);
bmpStructCounter++;
while(bmp085_dataFlag == 0);
bmp085_dataFlag = 0;
}
int main(void) {
int delay;
float fTemperature, fPressure, fAltitude, fK_Altitude, fAltitude_sum,fK_Altitude_sum;
int count,i;
// static float f_meas[VAR_COUNT], fAlt_Mean, fAlt_Var;
unsigned short sw1_count, sw2_count;
unsigned char sw1_was_cleared = 0, sw2_was_cleared = 0;
// Set the clocking to run directly from the external crystal/oscillator.
MAP_SysCtlClockSet(SYSCTL_SYSDIV_1 | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN |
WRFL_XTAL);
//init ports and peripherals
PlatformInit();
Nokia5110_Init();
Nokia5110_Clear();
Nokia5110_DrawFullImage(gears_logo);
for(delay=0; delay<1000000; delay=delay+1);
Nokia5110_Clear();
Nokia5110_SetCursor(3, 1);
Nokia5110_OutString("WRFL");
Nokia5110_SetCursor(1, 2);
Nokia5110_OutString("Prototype");
Nokia5110_SetCursor(2, 4);
Nokia5110_OutString("VER 0.1");
Nokia5110_SetCursor(0, 5);
Nokia5110_OutString("NightMecanic");
for(delay=0; delay<1000000; delay=delay+1);
Nokia5110_Clear();
//
// Enable interrupts to the processor.
//
MAP_IntMasterEnable();
//
// Initialize I2C1 peripheral.
//
I2CMInit(&g_sI2CInst, BMP180_I2C_BASE, BMP180_I2C_INT, 0xff, 0xff,
MAP_SysCtlClockGet());
//
// Initialize the BMP180
//
BMP180Init(&g_sBMP180Inst, &g_sI2CInst, BMP180_I2C_ADDRESS,
BMP180AppCallback, &g_sBMP180Inst);
//
// Wait for initialization callback to indicate reset request is complete.
//
while(g_vui8DataFlag == 0)
{
//
// Wait for I2C Transactions to complete.
//
}
//
// Reset the data ready flag
//
g_vui8DataFlag = 0;
//set oversampling to 8x
g_sBMP180Inst.ui8Mode = 0xC0;
//Initialize the Kalman filter
Kalman_Init(&Alt_KState, 0.0f, 1.0f, ALT_KALMAN_R, ALT_KALMAN_Q);
//
// Enable the system ticks at 10 hz.
//
MAP_SysTickPeriodSet(MAP_SysCtlClockGet() / (40 * 3));
MAP_SysTickIntEnable();
MAP_SysTickEnable();
Nokia5110_SetCursor(0, 0);
Nokia5110_OutString("SW1:");
Nokia5110_SetCursor(0, 2);
Nokia5110_OutString("SW2:");
//config done
count = 0;
//
// Begin the data collection and printing. Loop Forever.
//
while(1)
{
// SW1
if (sw_state & SW1){
if (sw1_was_cleared){
sw1_was_cleared = 0;
sw1_count++;
Nokia5110_SetCursor(5, 0);
Nokia5110_OutUDec(sw1_count);
}
}else
sw1_was_cleared = 1;
//SW2
if (sw_state & SW2){
if (sw2_was_cleared){
sw2_was_cleared = 0;
sw2_count++;
Nokia5110_SetCursor(5, 2);
Nokia5110_OutUDec(sw2_count);
}
}else
sw2_was_cleared = 1;
// handle BMP180 data (display average every 50 samples)
if (g_vui8DataFlag ){
//
// Reset the data ready flag.
//
g_vui8DataFlag = 0;
//
// Get a local copy of the latest temperature data in float format.
//
BMP180DataTemperatureGetFloat(&g_sBMP180Inst, &fTemperature);
//
// Print temperature with three digits of decimal precision.
//
//Nokia5110_SetCursor(0, 0);
//Nokia5110_OutString("Temp:");
//Nokia5110_OutFloatp3(fTemperature);
//
// Get a local copy of the latest air pressure data in float format.
//
BMP180DataPressureGetFloat(&g_sBMP180Inst, &fPressure);
//
// Print Pressure with three digits of decimal precision.
//
//Nokia5110_SetCursor(0, 1);
// Nokia5110_OutString("Pres:");
//Nokia5110_SetCursor(0, 2);
//display in hPa
//Nokia5110_OutFloatp3((fPressure / 100.0f));
//
// Calculate the altitude.
//
//fAltitude = 44330.0f * (1.0f - powf(fPressure / 101325.0f,
// 1.0f / 5.255f));
//corrected:
fAltitude = 44330.0f * (1.0f - powf(fPressure / LOC_ALT_P0,
1.0f / 5.255f));
// Kalman filtered altitude
Kalman_Update (&Alt_KState, fAltitude);
fK_Altitude = Alt_KState.X;
fAltitude_sum += fAltitude;
fK_Altitude_sum += fK_Altitude;
count++;
if (count>=50){
Nokia5110_SetCursor(0, 3);
Nokia5110_OutString("Alt:");
Nokia5110_OutFloatp3(fAltitude_sum/50.0);
Nokia5110_SetCursor(0, 5);
Nokia5110_OutString("KAlt:");
Nokia5110_OutFloatp3(fK_Altitude_sum/50.0);
fAltitude_sum = 0;
fK_Altitude_sum = 0;
count = 0;
}
/*
//calculate variance
f_meas[count]=fK_Altitude;
count++;
if (count>=VAR_COUNT){
fAlt_Mean = 0.0f;
fAlt_Var = 0.0f;
// calculate mean
for(i=0; i<VAR_COUNT; i++){
fAlt_Mean = fAlt_Mean +f_meas[i];
}
fAlt_Mean = fAlt_Mean/((float) VAR_COUNT);
// Calculate Var
for(i=0; i<VAR_COUNT; i++){
fAlt_Var = fAlt_Var + powf((f_meas[i] - fAlt_Mean),2.0f);
}
fAlt_Var = fAlt_Var/((float) VAR_COUNT);
//
// Print altitude with three digits of decimal precision.
//
Nokia5110_SetCursor(0, 4);
Nokia5110_OutString("Var:");
Nokia5110_OutFloatp3(fAlt_Var);
count = 0;
}
*/
//
// Delay to keep printing speed reasonable. About 100msec.
//
//MAP_SysCtlDelay(MAP_SysCtlClockGet() / (10 * 3));
}
}//while end
}
void initI2C(void)
{
uint8_t ui8Mask;
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOE);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOH);
SysCtlPeripheralEnable(SYSCTL_PERIPH_I2C7);
GPIOPinConfigure(GPIO_PD0_I2C7SCL);
GPIOPinConfigure(GPIO_PD1_I2C7SDA);
GPIOPinTypeI2CSCL(GPIO_PORTD_BASE, GPIO_PIN_0);
GPIOPinTypeI2C(GPIO_PORTD_BASE, GPIO_PIN_1);
//
// Configure and Enable the GPIO interrupt. Used for INT signal from the
// ISL29023
//
GPIOPinTypeGPIOInput(GPIO_PORTE_BASE, GPIO_PIN_5);
GPIOIntEnable(GPIO_PORTE_BASE, GPIO_PIN_5);
GPIOIntTypeSet(GPIO_PORTE_BASE, GPIO_PIN_5, GPIO_FALLING_EDGE);
IntEnable(INT_GPIOE);
I2CMInit(&g_sI2CInst, I2C7_BASE, INT_I2C7, 0xff, 0xff, g_SysClock);
//
// Initialize the SHT21.
//
SHT21Init(&g_sSHT21Inst, &g_sI2CInst, SHT21_I2C_ADDRESS,
SHT21AppCallback, &g_sSHT21Inst);
SysCtlDelay(g_SysClock / (100 * 3));
//
// Initialize the TMP006
//
TMP006Init(&g_sTMP006Inst, &g_sI2CInst, TMP006_I2C_ADDRESS,
TMP006AppCallback, &g_sTMP006Inst);
SysCtlDelay(g_SysClock / (100 * 3));
//
// Initialize the BMP180.
//
BMP180Init(&g_sBMP180Inst, &g_sI2CInst, BMP180_I2C_ADDRESS,
BMP180AppCallback, &g_sBMP180Inst);
SysCtlDelay(g_SysClock / (100 * 3));
IntPrioritySet(INT_I2C7, 0x00);
IntPrioritySet(INT_GPIOM, 0x00);
IntPrioritySet(INT_TIMER0A, 0x80);
IntPrioritySet(INT_TIMER1A, 0x40);
IntPrioritySet(INT_GPIOE, 0x80);
IntPrioritySet(INT_UART0, 0x80);
//
// Initialize the ISL29023 Driver.
//
ISL29023Init(&g_sISL29023Inst, &g_sI2CInst, ISL29023_I2C_ADDRESS,
ISL29023AppCallback, &g_sISL29023Inst);
SysCtlDelay(g_SysClock / (100 * 3));
//
// Configure the ISL29023 to measure ambient light continuously. Set a 8
// sample persistence before the INT pin is asserted. Clears the INT flag.
// Persistence setting of 8 is sufficient to ignore camera flashes.
//
ui8Mask = (ISL29023_CMD_I_OP_MODE_M | ISL29023_CMD_I_INT_PERSIST_M |
ISL29023_CMD_I_INT_FLAG_M);
ISL29023ReadModifyWrite(&g_sISL29023Inst, ISL29023_O_CMD_I, ~ui8Mask,
(ISL29023_CMD_I_OP_MODE_ALS_CONT |
ISL29023_CMD_I_INT_PERSIST_8),
ISL29023AppCallback, &g_sISL29023Inst);
//
// Configure the upper threshold to 80% of maximum value
//
g_sISL29023Inst.pui8Data[1] = 0xCC;
g_sISL29023Inst.pui8Data[2] = 0xCC;
ISL29023Write(&g_sISL29023Inst, ISL29023_O_INT_HT_LSB,
g_sISL29023Inst.pui8Data, 2, ISL29023AppCallback,
&g_sISL29023Inst);
//
// Wait for transaction to complete
//
SysCtlDelay(g_SysClock / (100 * 3));
//
// Configure the lower threshold to 20% of maximum value
//
g_sISL29023Inst.pui8Data[1] = 0x33;
g_sISL29023Inst.pui8Data[2] = 0x33;
ISL29023Write(&g_sISL29023Inst, ISL29023_O_INT_LT_LSB,
g_sISL29023Inst.pui8Data, 2, ISL29023AppCallback,
&g_sISL29023Inst);
//
// Wait for transaction to complete
//
SysCtlDelay(g_SysClock / (100 * 3));
//
// Write the command to start a humidity measurement.
//
SHT21Write(&g_sSHT21Inst, SHT21_CMD_MEAS_RH, g_sSHT21Inst.pui8Data, 0,
SHT21AppCallback, &g_sSHT21Inst);
//
// Wait for transaction to complete
//
SysCtlDelay(g_SysClock / (100 * 3));
//
// Initialize the MPU9150 Driver.
//
MPU9150Init(&g_sMPU9150Inst, &g_sI2CInst, MPU9150_I2C_ADDRESS,
MPU9150AppCallback, &g_sMPU9150Inst);
SysCtlDelay(g_SysClock / (100 * 3));
//
// Write application specifice sensor configuration such as filter settings
// and sensor range settings.
//
g_sMPU9150Inst.pui8Data[0] = MPU9150_CONFIG_DLPF_CFG_94_98;
g_sMPU9150Inst.pui8Data[1] = MPU9150_GYRO_CONFIG_FS_SEL_250;
g_sMPU9150Inst.pui8Data[2] = (MPU9150_ACCEL_CONFIG_ACCEL_HPF_5HZ |
MPU9150_ACCEL_CONFIG_AFS_SEL_2G);
MPU9150Write(&g_sMPU9150Inst, MPU9150_O_CONFIG, g_sMPU9150Inst.pui8Data, 3,
MPU9150AppCallback, &g_sMPU9150Inst);
SysCtlDelay(g_SysClock / (100 * 3));
//
// Initialize the DCM system. 50 hz sample rate.
// accel weight = .2, gyro weight = .8, mag weight = .2
//
CompDCMInit(&g_sCompDCMInst, 1.0f / 50.0f, 0.2f, 0.6f, 0.2f);
SysCtlDelay(g_SysClock / (100 * 3));
ui32CompDCMStarted = 0;
//
// Print the basic outline of our data table. Done once and then kept as we
// print only the data.
//
// CLI_Write("\033[2J\033[H");
// CLI_Write("MPU9150 9-Axis Simple Data Application Example\n\r\n\r");
// CLI_Write("\033[20GX\033[31G|\033[43GY\033[54G|\033[66GZ\n\r\n\r");
// CLI_Write("Accel\033[8G|\033[31G|\033[54G|\n\r\n\r");
// CLI_Write("Gyro\033[8G|\033[31G|\033[54G|\n\r\n\r");
// CLI_Write("Mag\033[8G|\033[31G|\033[54G|\n\r\n\r");
// CLI_Write("\n\033[20GRoll\033[31G|\033[43GPitch\033[54G|\033[66GYaw\n\r\n\r");
// CLI_Write("Eulers\033[8G|\033[31G|\033[54G|\n\r\n\r");
// CLI_Write("\n\033[17GQ1\033[26G|\033[35GQ2\033[44G|\033[53GQ3\033[62G|"
// "\033[71GQ4\n\r\n\r");
// CLI_Write("Q\033[8G|\033[26G|\033[44G|\033[62G|\n\r\n\r");
TimerEnable(TIMER1_BASE, TIMER_A);
}
//*****************************************************************************
//
// Main 'C' Language entry point.
//
//*****************************************************************************
int
main(void)
{
float fTemperature, fPressure, fAltitude;
int32_t i32IntegerPart;
int32_t i32FractionPart;
//
// Setup the system clock to run at 40 MHz from PLL with crystal reference
//
ROM_SysCtlClockSet(SYSCTL_SYSDIV_5 | SYSCTL_USE_PLL | SYSCTL_XTAL_16MHZ |
SYSCTL_OSC_MAIN);
//
// Initialize the UART.
//
ConfigureUART();
//
// Print the welcome message to the terminal.
//
UARTprintf("\033[2JBMP180 Example\n");
//
// Set the color to a white approximation.
//
g_pui32Colors[RED] = 0x8000;
g_pui32Colors[BLUE] = 0x8000;
g_pui32Colors[GREEN] = 0x8000;
//
// Initialize RGB driver. Use a default intensity and blink rate.
//
RGBInit(0);
RGBColorSet(g_pui32Colors);
RGBIntensitySet(0.5f);
RGBEnable();
//
// The I2C3 peripheral must be enabled before use.
//
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_I2C3);
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
//
// Configure the pin muxing for I2C3 functions on port D0 and D1.
// This step is not necessary if your part does not support pin muxing.
//
ROM_GPIOPinConfigure(GPIO_PD0_I2C3SCL);
ROM_GPIOPinConfigure(GPIO_PD1_I2C3SDA);
//
// Select the I2C function for these pins. This function will also
// configure the GPIO pins pins for I2C operation, setting them to
// open-drain operation with weak pull-ups. Consult the data sheet
// to see which functions are allocated per pin.
//
GPIOPinTypeI2CSCL(GPIO_PORTD_BASE, GPIO_PIN_0);
ROM_GPIOPinTypeI2C(GPIO_PORTD_BASE, GPIO_PIN_1);
//
// Initialize the GPIO for the LED.
//
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
ROM_GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, GPIO_PIN_1);
ROM_GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_1, 0x00);
//
// Enable interrupts to the processor.
//
ROM_IntMasterEnable();
//
// Initialize the I2C3 peripheral.
//
I2CMInit(&g_sI2CInst, I2C3_BASE, INT_I2C3, 0xff, 0xff,
ROM_SysCtlClockGet());
//
// Initialize the BMP180.
//
BMP180Init(&g_sBMP180Inst, &g_sI2CInst, BMP180_I2C_ADDRESS,
BMP180AppCallback, &g_sBMP180Inst);
//
// Wait for initialization callback to indicate reset request is complete.
//
while(g_vui8DataFlag == 0)
{
//
// Wait for I2C Transactions to complete.
//
}
//
// Reset the data ready flag
//
g_vui8DataFlag = 0;
//
// Enable the system ticks at 10 Hz.
//
ROM_SysTickPeriodSet(ROM_SysCtlClockGet() / (10 * 3));
ROM_SysTickIntEnable();
ROM_SysTickEnable();
//
// After all the init and config we start blink the LED
//
RGBBlinkRateSet(1.0f);
//
// Begin the data collection and printing. Loop Forever.
//
while(1)
{
//
// Read the data from the BMP180 over I2C. This command starts a
// temperature measurement. Then polls until temperature is ready.
// Then automatically starts a pressure measurement and polls for that
// to complete. When both measurement are complete and in the local
// buffer then the application callback is called from the I2C
// interrupt context. Polling is done on I2C interrupts allowing
// processor to continue doing other tasks as needed.
//
BMP180DataRead(&g_sBMP180Inst, BMP180AppCallback, &g_sBMP180Inst);
while(g_vui8DataFlag == 0)
{
//
// Wait for the new data set to be available.
//
}
//
// Reset the data ready flag.
//
g_vui8DataFlag = 0;
//
// Get a local copy of the latest temperature data in float format.
//
BMP180DataTemperatureGetFloat(&g_sBMP180Inst, &fTemperature);
//
// Convert the floats to an integer part and fraction part for easy
// print.
//
i32IntegerPart = (int32_t) fTemperature;
i32FractionPart =(int32_t) (fTemperature * 1000.0f);
i32FractionPart = i32FractionPart - (i32IntegerPart * 1000);
if(i32FractionPart < 0)
{
i32FractionPart *= -1;
}
//
// Print temperature with three digits of decimal precision.
//
UARTprintf("Temperature %3d.%03d\t\t", i32IntegerPart, i32FractionPart);
//
// Get a local copy of the latest air pressure data in float format.
//
BMP180DataPressureGetFloat(&g_sBMP180Inst, &fPressure);
//
// Convert the floats to an integer part and fraction part for easy
// print.
//
i32IntegerPart = (int32_t) fPressure;
i32FractionPart =(int32_t) (fPressure * 1000.0f);
i32FractionPart = i32FractionPart - (i32IntegerPart * 1000);
if(i32FractionPart < 0)
{
i32FractionPart *= -1;
}
//
// Print Pressure with three digits of decimal precision.
//
UARTprintf("Pressure %3d.%03d\t\t", i32IntegerPart, i32FractionPart);
//
// Calculate the altitude.
//
fAltitude = 44330.0f * (1.0f - powf(fPressure / 101325.0f,
1.0f / 5.255f));
//
// Convert the floats to an integer part and fraction part for easy
// print.
//
i32IntegerPart = (int32_t) fAltitude;
i32FractionPart =(int32_t) (fAltitude * 1000.0f);
i32FractionPart = i32FractionPart - (i32IntegerPart * 1000);
if(i32FractionPart < 0)
{
i32FractionPart *= -1;
}
//
// Print altitude with three digits of decimal precision.
//
UARTprintf("Altitude %3d.%03d", i32IntegerPart, i32FractionPart);
//
// Print new line.
//
UARTprintf("\n");
//
// Delay to keep printing speed reasonable. About 100 milliseconds.
//
ROM_SysCtlDelay(ROM_SysCtlClockGet() / (10 * 3));
}//while end
}
//*****************************************************************************
//
// Main 'C' Language entry point.
//
//*****************************************************************************
int
main(void)
{
float fTemperature, fPressure, fAltitude;
int32_t i32IntegerPart;
int32_t i32FractionPart;
tContext sContext;
uint32_t ui32SysClock;
char pcBuf[15];
//
// Setup the system clock to run at 40 Mhz from PLL with crystal reference
//
ui32SysClock = MAP_SysCtlClockFreqSet((SYSCTL_XTAL_25MHZ |
SYSCTL_OSC_MAIN |
SYSCTL_USE_PLL |
SYSCTL_CFG_VCO_480), 40000000);
//
// Configure the device pins.
//
PinoutSet();
//
// Initialize the display driver.
//
Kentec320x240x16_SSD2119Init(ui32SysClock);
//
// Initialize the graphics context.
//
GrContextInit(&sContext, &g_sKentec320x240x16_SSD2119);
//
// Draw the application frame.
//
FrameDraw(&sContext, "bmp180");
//
// Flush any cached drawing operations.
//
GrFlush(&sContext);
//
// Enable UART0
//
MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0);
//
// Initialize the UART for console I/O.
//
UARTStdioConfig(0, 115200, ui32SysClock);
//
// Print the welcome message to the terminal.
//
UARTprintf("\033[2JBMP180 Example\n");
//
// The I2C3 peripheral must be enabled before use.
//
MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_I2C3);
//
// Configure the pin muxing for I2C3 functions on port G4 and G5.
// This step is not necessary if your part does not support pin muxing.
//
MAP_GPIOPinConfigure(GPIO_PG4_I2C3SCL);
MAP_GPIOPinConfigure(GPIO_PG5_I2C3SDA);
//
// Select the I2C function for these pins. This function will also
// configure the GPIO pins pins for I2C operation, setting them to
// open-drain operation with weak pull-ups. Consult the data sheet
// to see which functions are allocated per pin.
//
MAP_GPIOPinTypeI2CSCL(GPIO_PORTG_BASE, GPIO_PIN_4);
MAP_GPIOPinTypeI2C(GPIO_PORTG_BASE, GPIO_PIN_5);
//
// Enable interrupts to the processor.
//
MAP_IntMasterEnable();
//
// Initialize I2C3 peripheral.
//
I2CMInit(&g_sI2CInst, I2C3_BASE, INT_I2C3, 0xff, 0xff,
ui32SysClock);
//
// Initialize the BMP180
//
BMP180Init(&g_sBMP180Inst, &g_sI2CInst, BMP180_I2C_ADDRESS,
BMP180AppCallback, &g_sBMP180Inst);
//
// Wait for initialization callback to indicate reset request is complete.
//
while(g_vui8DataFlag == 0)
{
//
// Wait for I2C Transactions to complete.
//
}
//
// Reset the data ready flag
//
g_vui8DataFlag = 0;
//
// Enable the system ticks at 10 hz.
//
MAP_SysTickPeriodSet(ui32SysClock / (10 * 3));
MAP_SysTickIntEnable();
MAP_SysTickEnable();
//
// Configure PQ4 to control the blue LED.
//
MAP_GPIOPinTypeGPIOOutput(GPIO_PORTQ_BASE, GPIO_PIN_4);
//
// Print temperature, pressure and altitude labels once on the LCD.
//
GrStringDraw(&sContext, "Temperature", 11,
((GrContextDpyWidthGet(&sContext) / 2) - 96),
((GrContextDpyHeightGet(&sContext) - 32) / 2) - 24, 1);
GrStringDraw(&sContext, "Pressure", 8,
((GrContextDpyWidthGet(&sContext) / 2) - 63),
(GrContextDpyHeightGet(&sContext) - 32) / 2, 1);
GrStringDraw(&sContext, "Altitude", 8,
((GrContextDpyWidthGet(&sContext) / 2) - 59),
((GrContextDpyHeightGet(&sContext) - 32) / 2) + 24, 1);
//
// Begin the data collection and printing. Loop Forever.
//
while(1)
{
//
// Read the data from the BMP180 over I2C. This command starts a
// temperature measurement. Then polls until temperature is ready.
// Then automatically starts a pressure measurement and polls for that
// to complete. When both measurement are complete and in the local
// buffer then the application callback is called from the I2C
// interrupt context. Polling is done on I2C interrupts allowing
// processor to continue doing other tasks as needed.
//
BMP180DataRead(&g_sBMP180Inst, BMP180AppCallback, &g_sBMP180Inst);
while(g_vui8DataFlag == 0)
{
//
// Wait for the new data set to be available.
//
}
//
// Reset the data ready flag.
//
g_vui8DataFlag = 0;
//
// Get a local copy of the latest temperature data in float format.
//
BMP180DataTemperatureGetFloat(&g_sBMP180Inst, &fTemperature);
//
// Convert the floats to an integer part and fraction part for easy
// print.
//
i32IntegerPart = (int32_t) fTemperature;
i32FractionPart =(int32_t) (fTemperature * 1000.0f);
i32FractionPart = i32FractionPart - (i32IntegerPart * 1000);
if(i32FractionPart < 0)
{
i32FractionPart *= -1;
}
//
// Print temperature with three digits of decimal precision to LCD and
// terminal.
//
usnprintf(pcBuf, sizeof(pcBuf), "%03d.%03d ", i32IntegerPart,
i32FractionPart);
GrStringDraw(&sContext, pcBuf, 8,
((GrContextDpyWidthGet(&sContext) / 2) + 16),
((GrContextDpyHeightGet(&sContext) - 32) / 2) - 24, 1);
UARTprintf("Temperature %3d.%03d\t\t", i32IntegerPart,
i32FractionPart);
//
// Get a local copy of the latest air pressure data in float format.
//
BMP180DataPressureGetFloat(&g_sBMP180Inst, &fPressure);
//
// Convert the floats to an integer part and fraction part for easy
// print.
//
i32IntegerPart = (int32_t) fPressure;
i32FractionPart =(int32_t) (fPressure * 1000.0f);
i32FractionPart = i32FractionPart - (i32IntegerPart * 1000);
if(i32FractionPart < 0)
{
i32FractionPart *= -1;
}
//
// Print Pressure with three digits of decimal precision to LCD and
// terminal.
//
usnprintf(pcBuf, sizeof(pcBuf), "%3d.%03d ", i32IntegerPart,
i32FractionPart);
GrStringDraw(&sContext, pcBuf, -1,
((GrContextDpyWidthGet(&sContext) / 2) + 16),
(GrContextDpyHeightGet(&sContext) - 32) / 2, 1);
UARTprintf("Pressure %3d.%03d\t\t", i32IntegerPart, i32FractionPart);
//
// Calculate the altitude.
//
fAltitude = 44330.0f * (1.0f - powf(fPressure / 101325.0f,
1.0f / 5.255f));
//
// Convert the floats to an integer part and fraction part for easy
// print.
//
i32IntegerPart = (int32_t) fAltitude;
i32FractionPart =(int32_t) (fAltitude * 1000.0f);
i32FractionPart = i32FractionPart - (i32IntegerPart * 1000);
if(i32FractionPart < 0)
{
i32FractionPart *= -1;
}
//
// Print altitude with three digits of decimal precision to LCD and
// terminal.
//
usnprintf(pcBuf, sizeof(pcBuf), "%3d.%03d ", i32IntegerPart,
i32FractionPart);
GrStringDraw(&sContext, pcBuf, 8,
((GrContextDpyWidthGet(&sContext) / 2) + 16),
((GrContextDpyHeightGet(&sContext) - 32) / 2) + 24, 1);
UARTprintf("Altitude %3d.%03d", i32IntegerPart, i32FractionPart);
//
// Print new line.
//
UARTprintf("\n");
//
// Delay to keep printing speed reasonable. About 100 milliseconds.
//
MAP_SysCtlDelay(ui32SysClock / (10 * 3));
}
}
