/*****************************************************************************
* Function Name: BatteryLevel_Measure()
******************************************************************************
* Summary:
* Measures the current battery level.
*
* Parameters:
* None
*
* Return:
* None
*
* Theory:
* The function checks if the battery measurement enable flag is set in the
* ADC ISR, and then measures the current battery level.
*
* Side Effects:
* None
*
* Note:
*
*****************************************************************************/
void BatteryLevel_Measure(void)
{
uint16 adcCountsVref;
static uint32 vddaVoltageMv;
/* Disconnect the VREF pin from the chip and lose its existing voltage */
CY_SET_REG32(CYREG_SAR_CTRL, CY_GET_REG32(CYREG_SAR_CTRL) & ~(0x01 << 7));
VrefInputPin_SetDriveMode(VrefInputPin_DM_STRONG);
VrefInputPin_Write(0);
CyDelayUs(10);
/* Switch SAR reference to 1.024V to charge external cap */
VrefInputPin_SetDriveMode(VrefInputPin_DM_ALG_HIZ);
CY_SET_REG32(CYREG_SAR_CTRL, (CY_GET_REG32(CYREG_SAR_CTRL) & ~(0x000000F0Lu)) | (0x00000040Lu) | (0x01Lu << 7));
CyDelayUs(100);
/* Switch the reference back to VDDA/2 for measuring the REF voltage */
CY_SET_REG32(CYREG_SAR_CTRL, CY_GET_REG32(CYREG_SAR_CTRL) & ~(0x01 << 7));
CY_SET_REG32(CYREG_SAR_CTRL, (CY_GET_REG32(CYREG_SAR_CTRL) & ~(0x00000070Lu)) | (0x00000060Lu));
/* Enable channel 1 of the ADC, disable channel 0 */
ADC_SetChanMask(0x02);
/* Clear ADC interrupt triggered flag and start a new conversion */
canMeasureBattery = false;
ADC_StartConvert();
while(true != canMeasureBattery);
/* Since our ADC reference is VDDA/2, we get full scale (11-bit) at VDDA/2.
* We can calculate VDDA by the formula:
* VDDA = (VREF * (Full scale ADC out) * 2) / (ADC out for VREF)
*/
adcCountsVref = ADC_GetResult16(1);
if(adcCountsVref != 0)
{
vddaVoltageMv = ((uint32)VREF_VOLTAGE_MV * ADC_FULL_SCALE_OUT * 2) / (uint32)adcCountsVref;
}
/* Battery level is implemented as a linear plot from 2.0V to 3.0V
* Battery % level = (0.1 x VDDA in mV) - 200
*/
batteryLevel = ((uint32)(vddaVoltageMv / 10)) - 200;
if((batteryLevel > 100) && (batteryLevel < 230))
{
batteryLevel = 100;
}
else if(batteryLevel >= 230)
{
batteryLevel = 0;
}
/* Enable channel 0 again, disable channel 1 */
ADC_SetChanMask(0x01);
/* Enable bypass cap for the VDDA/2 reference */
CY_SET_REG32(CYREG_SAR_CTRL, CY_GET_REG32(CYREG_SAR_CTRL) | (0x01 << 7));
}
void PrintColumn(uint8 col)
{
uint16 res[8];
for(uint8 i=0; i<8; ++i)
{
res[i] = ADC_GetResult16(i);
}
if (status_register.matrix_output > 0)
{
outbox.response_type = C2RESPONSE_MATRIX_STATUS;
outbox.payload[0] = col;
outbox.payload[1] = status_register.matrix_output;
memcpy(&outbox.payload[2], res, sizeof(res));
usb_send();
}
}
void main()
{
/* Place your initialization/startup code here (e.g. MyInst_Start()) */
uint16 adc, compare;
LCD_Start();
ADC_Start();
PWM_Start();
/* CyGlobalIntEnable; */ /* Uncomment this line to enable global interrupts. */
for(;;)
{
/* Place your application code here. */
// LCD_ClearDisplay();
LCD_Start();
adc = 0;
ADC_StartConvert();
ADC_IsEndConversion(ADC_WAIT_FOR_RESULT);
ADC_StopConvert();
adc = ADC_GetResult16();
if(adc > 255)
{
if(adc == 0xFFFF) /* underflow correction */
{
adc = 0x00;
}
else
adc = 0xFF; /* Overflow correction */
}
LCD_Position(0,0);
LCD_PrintHexUint8(adc);
compare = (uint16)(1000 + ((float)((float)((float)adc / (float)255) * (float)1000)));
LCD_Position(1,0);
LCD_PrintDecUint16(compare);
PWM_WriteCompare(compare);
PWM_WritePeriod(compare + 39999);
}
}
BTN_states getButton(void){
BTN_states btn;
uint16 temp = ADC_GetResult16(1); //A0
if (temp == 0xFFFF || temp <= 5)
btn = RIGHT;
else if(temp <= 20)
btn = UP;
else if(temp <= 40)
btn = DOWN;
else if(temp <= 60)
btn = LEFT;
else if(temp <= 100)
btn = SELECT;
else
btn = UNPRESSED;
if (btn_old != btn)
return btn_old = btn;
else
return UNPRESSED;
}
/*****************************************************************************
* Function Name: MeasureSensorVoltage()
******************************************************************************
* Summary:
* Measures the voltage connected at ADC input.
*
* Parameters:
* None
*
* Return:
* uint16 - Measured voltage
*
* Theory:
* This functions sequences the AMux to next channel and connects reference
* signal or thermistor or offset signal at ADC input. It then triggers the ADC
* and measures the signal.
*
* Side Effects:
* None
*
* Note:
*
*****************************************************************************/
static uint16 MeasureSensorVoltage ()
{
/* Connect next channel available at AMux input to Amux output */
/* Note: If no channels are connected, channel 0 gets connected by this
* fucntion */
AMuxSeq_Next();
/* Start sample conversion */
ADC_StartConvert();
/* Wait till end of two conversions and drop one sample for signal to settle
* down, it's not required if reference is continuously available.
* To reduce current consumption, CPU can be put to sleep while ADC conversion
* is in process. */
ADC_IsEndConversion(ADC_WAIT_FOR_RESULT);
ADC_IsEndConversion(ADC_WAIT_FOR_RESULT);
/* Stop ADC coversion */
ADC_StopConvert();
/* Return 16 bit measured value */
return (ADC_GetResult16(0));
}
int main()
{
CyDelay(200);
uint16 Counts=0; // ADC value (0 to 4095) right shifted by 6 which gives
// us 0 to 63 to be used to simulate actual temperature
uint16 TempSet = 2400; // Temperature set default value (left justified) 24 deg
uint16 DisplayTemp = 0; // The combined sum of desired temp and actual temp
uint16 bleTemp = 0; // Temperature sent to BLE module
uint16 bleTempSet = 0; // Temperature set value sent to BLE module
uint8 button0 = 0; // Declare CapSense button name button0
uint8 button1 = 0; // Declare CapSense button name button1
uint8 firstpress0 = 0; // Detects a transition of button1 from 0 to 1
uint8 firstpress1 = 0; // Detects a transition of button1 from 0 to 1
int buttonPrevious = 1;
CyGlobalIntEnable;
ADC_Start(); // Starts the ADC component
ADC_StartConvert(); // The ADC conversion process begins
LCD_Start(); // Start the LCD component
CapSense_Start();
CapSense_ScanAllWidgets();
LCD_WritePixel(LCD_COLON, TRUE);
ResetTimer_Start();
sendBootload_StartEx(StartBootload_ISR);
BLEIOT_Start();
/* Initialize temperuature values out of range so that main loop update is triggered */
BLEIOT_updateTemperature(10000);
BLEIOT_updatePot(100);
for(;;)
{
/* Turn BLE on/off with button press */
if(buttonPrevious && (Button_Read() == 0))
{
if(BLEIOT_remote.bleState == BLEIOT_BLEOFF)
{
BLEIOT_updateBleState(BLEIOT_BLEON);
}
else
{
BLEIOT_updateBleState(BLEIOT_BLEOFF);
}
}
buttonPrevious = Button_Read();
/* Local Thermostat Operation */
/* ADC */
// Read the ADC, shift right by 6 (i.e. divide by 64)
// and store result in Counts
Counts = ADC_GetResult16(POT_CHAN);
Counts = Counts >> 6;
/* CapSense */
if (!CapSense_IsBusy())
{
// Check Button states and store
CapSense_ProcessAllWidgets();
if(CapSense_IsWidgetActive(CapSense_BUTTON0_WDGT_ID))
{
button0 = 1;
}
else
{
button0 = 0;
}
if(CapSense_IsWidgetActive(CapSense_BUTTON1_WDGT_ID))
{
button1 = 1;
}
else
{
button1 = 0;
}
// Light LEDs Based on Capsense buttons
LED_CS0_Write(~button0);
LED_CS1_Write(~button1);
// Check for button touchdown transitions
if (button0 == 1)
{
if(firstpress0 == 0) // Touchdown event
{
firstpress0 = 1; // Remember button0 was pressed
TempSet = TempSet + 100; // Increment Temp by 1 deg
}
}
else
{
firstpress0 = 0; // Button released
}
if (button1 == 1)
{
if(firstpress1 == 0) // Touchdown event
{
firstpress1 = 1; // Remember button0 was pressed
TempSet = TempSet - 100; // Decrement Temp by 1 deg
}
}
else
{
firstpress1 = 0; // Button released
}
CapSense_ScanAllWidgets(); // Start Next Scan
}
/* Warning LEDs and Buzzer */
if((Counts * 100) < TempSet) // Temperature Cold
{
LED_Blue_Write(LED_ON); // Blue On
LED_Green_Write(LED_OFF); // Green Off
LED_Red_Write(LED_OFF); // Red Off
PWM_Stop(); // Buzzer Off
}
else if ((Counts * 100) <= (TempSet + 500)) // Temperature OK
{
LED_Blue_Write(LED_OFF); // Blue Off
LED_Green_Write(LED_ON); // Green On
LED_Red_Write(LED_OFF); // Red Off
PWM_Stop();// Buzzer Off
}
else // Tempearture too high
{
LED_Blue_Write(LED_OFF); // Blue Off
LED_Green_Write(LED_OFF); // Green Off
LED_Red_Write(LED_ON); // Red On
PWM_Start(); // Buzzer On
}
/* LCD Display */
DisplayTemp = TempSet + Counts;
LCD_Write7SegNumber_0(DisplayTemp, POS, MODE);
/* BLE operation - do only if BLE is not off */
if(BLEIOT_remote.bleState != BLEIOT_BLEOFF)
{
/* Send new temperature data to the BLE module */
if(bleTemp != Counts)
{
bleTemp = Counts;
BLEIOT_updatePot(bleTemp);
}
if(bleTempSet != TempSet)
{
bleTempSet = TempSet;
/* Scale set temperature down to whole number of degrees */
BLEIOT_updateTemperature(TempSet / 100);
}
/* Get new data from the BLE module */
/* LED0 is used for temperature changes */
if(BLEIOT_getDirtyFlags() & BLEIOT_FLAG_LED0)
{
/* Update local variable copy and clear dirty flag */
BLEIOT_updateLed0(BLEIOT_remote.led0);
if(BLEIOT_local.led0 == UP)
{
TempSet = TempSet + 100; // Increment Temp by 1 deg
}
else if (BLEIOT_local.led0 == DOWN)
{
TempSet = TempSet - 100; // Decrement Temp by 1 deg
}
}
} /* End of !BLEOFF state operations */
} /* End of superloop */
} /* End of main */