short read_sensor(unsigned char volatile *target)
{
static short cntr = 0;
if(!is_power_good())
sleep();
P1OUT &= ~RX_EN_PIN; // turn off comparator
// set up watchdog interval timer to sleep during settle time
WDTCTL = WDT_MDLY_0_5;
IE1 |= WDTIE;
// a little time for regulator to stabilize active mode current AND
// filter caps to settle. for WDT_MDLY_0_5 * 48, this is 10 ms
DEBUG_PIN5_HIGH;
for ( int k = 0 ; k < 48 ; k++ )
{
_BIS_SR(LPM1_bits+GIE);
}
DEBUG_PIN5_LOW;
IE1 &= ~WDTIE;
if ( !is_power_good() )
{
DEBUG_PIN5_HIGH;
DEBUG_PIN5_LOW;
return 0;
}
//#define DELTA 0x05
#define DELTA 0x0B
//#define DELTA 0x14
#define HIBYTE 0x01
//#define HIBYTE 0x02
*(target) = HIBYTE;
*(target + 1 ) = 0xF8;
*(target + 2) = HIBYTE;
*(target + 3 ) = 0xF3;
*(target + 4) = HIBYTE;
*(target + 5 ) = 0xCA;
if ( cntr++ == 2 )
{
*(target + 1 ) = 0xF8 - DELTA;
*(target + 3 ) = 0xF3 - DELTA;
*(target + 5 ) = 0xCA + DELTA;
cntr = 0;
}
return 1;
}
void read_sensor(unsigned char volatile *target)
{
#if MONITOR_DEBUG_ON
// for monitor - set READ_SENSOR_STATE debug line - 00101 - 5
P1OUT |= wisp_debug_1;
P1OUT &= ~wisp_debug_1;
P2OUT &= ~wisp_debug_2;
P3OUT = 0x21;
#endif
// slow down clock
BCSCTL1 = XT2OFF + RSEL1; // select internal resistor (still has effect when DCOR=1)
DCOCTL = DCO1+DCO0; // set DCO step.
if(!is_power_good())
sleep();
// already off. Only needs to be done when READ has set
P1OUT &= ~RX_EN_PIN; // turn off comparator
// Set up ADC for internal temperature sensor
ADC10CTL0 &= ~ENC; // make sure this is off otherwise settings are locked.
ADC10CTL1 = INCH_10 + ADC10DIV_3; // Temp Sensor ADC10CLK/4
ADC10CTL0 = SREF_1 + ADC10SHT_3 + REFON + ADC10ON;
// a little time for regulator to stabilize active mode current AND
// filter caps to settle.
for (int i = 0; i < 50; i++);
// start conversion
unsigned int k = 0;
ADC10CTL0 |= ENC + ADC10SC; // Sampling and conversion start
while (ADC10CTL1 & ADC10BUSY); // wait while ADC finished work
*(target + k + 1 ) = (ADC10MEM & 0xff);
// grab msb bits and store it
*(target + k) = (ADC10MEM & 0x0300) >> 8;
// Power off sensor and adc
ADC10CTL0 &= ~ENC;
ADC10CTL1 = 0; // turn adc off
ADC10CTL0 = 0; // turn adc off
// Store sensor read count
sensor_counter++;
ackReply[10] = (sensor_counter & 0x00ff);
// grab msb bits and store it
ackReply[9] = (sensor_counter & 0xff00) >> 8;
return;
}
inline void sleep()
{
P1OUT &= ~RX_EN_PIN;
// enable port interrupt for voltage supervisor
P2IES = 0;
P2IFG = 0;
P2IE |= VOLTAGE_SV_PIN;
P1IE = 0;
P1IFG = 0;
TACTL = 0;
_BIC_SR(GIE); // temporarily disable GIE so we can sleep and enable interrupts
// at the same time
P2IE |= VOLTAGE_SV_PIN; // Enable Port 2 interrupt
if (is_power_good())
P2IFG = VOLTAGE_SV_PIN;
_BIS_SR(LPM4_bits | GIE);
return;
}
int main(void)
{
//*******************************Timer setup**********************************
WDTCTL = WDTPW + WDTHOLD; // Stop Watchdog Timer
P1SEL = 0;
P2SEL = 0;
P1IE = 0;
P1IFG = 0;
P2IFG = 0;
DRIVE_ALL_PINS // set pin directions correctly and outputs to low.
// Check power on bootup, decide to receive or sleep.
if(!is_power_good())
sleep();
RECEIVE_CLOCK;
#if DEBUG_PINS_ENABLED
#if USE_2618
DEBUG_PIN5_LOW;
#endif
#endif
#if ENABLE_SLOTS
// setup int epc
epc = ackReply[2]<<8;
epc |= ackReply[3];
// calculate RN16_1 table
for (Q = 0; Q < 16; Q++)
{
rn16 = epc^Q;
lfsr();
if (Q > 8)
{
RN16[(Q<<1)-9] = __swap_bytes(rn16);
RN16[(Q<<1)-8] = rn16;
}
else
{
RN16[Q] = rn16;
}
}
#endif
TACTL = 0;
asm("MOV #0000h, R9");
// dest = destorig;
#if READ_SENSOR
init_sensor();
#endif
#if !(ENABLE_SLOTS)
queryReplyCRC = crc16_ccitt(&queryReply[0],2);
queryReply[3] = (unsigned char)queryReplyCRC;
queryReply[2] = (unsigned char)__swap_bytes(queryReplyCRC);
#endif
#if SENSOR_DATA_IN_ID
// this branch is for sensor data in the id
ackReply[2] = SENSOR_DATA_TYPE_ID;
state = STATE_READ_SENSOR;
timeToSample++;
#else
ackReplyCRC = crc16_ccitt(&ackReply[0], 14);
ackReply[15] = (unsigned char)ackReplyCRC;
ackReply[14] = (unsigned char)__swap_bytes(ackReplyCRC);
#endif
#if ENABLE_SESSIONS
initialize_sessions();
#endif
state = STATE_READY;
setup_to_receive();
while (1)
{
// TIMEOUT! reset timer
if (TAR > 0x256 || delimiterNotFound) // was 0x1000
{
if(!is_power_good()) {
sleep();
}
#if SENSOR_DATA_IN_ID
// this branch is for sensor data in the id
if ( timeToSample++ == 10 ) {
state = STATE_READ_SENSOR;
timeToSample = 0;
}
#elif SENSOR_DATA_IN_READ_COMMAND
if ( timeToSample++ == 10 ) {
state = STATE_READ_SENSOR;
timeToSample = 0;
}
#else
#if !(ENABLE_READS)
if(!is_power_good())
sleep();
#endif
inInventoryRound = 0;
state = STATE_READY;
#endif
#if ENABLE_SESSIONS
handle_session_timeout();
#endif
#if ENABLE_SLOTS
if (shift < 4)
shift += 1;
else
shift = 0;
#endif
setup_to_receive();
}
switch (state)
{
case STATE_READY:
{
inInventoryRound = 0;
//////////////////////////////////////////////////////////////////////
// process the QUERY command
//////////////////////////////////////////////////////////////////////
if ( bits == NUM_QUERY_BITS && ( ( cmd[0] & 0xF0 ) == 0x80 ) )
{
handle_query(STATE_REPLY);
setup_to_receive();
}
//////////////////////////////////////////////////////////////////////
// process the SELECT command
//////////////////////////////////////////////////////////////////////
// @ short distance has slight impact on performance
else if ( bits >= 44 && ( ( cmd[0] & 0xF0 ) == 0xA0 ) )
{
handle_select(STATE_READY);
delimiterNotFound = 1;
} // select command
//////////////////////////////////////////////////////////////////////
// got >= 22 bits, and it's not the beginning of a select. just reset.
//////////////////////////////////////////////////////////////////////
else if ( bits >= MAX_NUM_QUERY_BITS && ( ( cmd[0] & 0xF0 ) != 0xA0 ) )
{
do_nothing();
state = STATE_READY;
delimiterNotFound = 1;
}
break;
}
case STATE_ARBITRATE:
{
//////////////////////////////////////////////////////////////////////
// process the QUERY command
//////////////////////////////////////////////////////////////////////
if ( bits == NUM_QUERY_BITS && ( ( cmd[0] & 0xF0 ) == 0x80 ) )
{
handle_query(STATE_REPLY);
setup_to_receive();
}
//////////////////////////////////////////////////////////////////////
// got >= 22 bits, and it's not the beginning of a select. just reset.
//////////////////////////////////////////////////////////////////////
//else if ( bits >= NUM_QUERY_BITS )
else if ( bits >= MAX_NUM_QUERY_BITS && ( ( cmd[0] & 0xF0 ) != 0xA0 ) )
{
do_nothing();
state = STATE_READY;
delimiterNotFound = 1;
}
// this state handles query, queryrep, queryadjust, and select commands.
//////////////////////////////////////////////////////////////////////
// process the QUERYREP command
//////////////////////////////////////////////////////////////////////
else if ( bits == NUM_QUERYREP_BITS && ( ( cmd[0] & 0x06 ) == 0x00 ) )
{
handle_queryrep(STATE_REPLY);
delimiterNotFound = 1;
} // queryrep command
//////////////////////////////////////////////////////////////////////
// process the QUERYADJUST command
//////////////////////////////////////////////////////////////////////
else if ( bits == NUM_QUERYADJ_BITS && ( ( cmd[0] & 0xF8 ) == 0x48 ) )
{
handle_queryadjust(STATE_REPLY);
setup_to_receive();
} // queryadjust command
//////////////////////////////////////////////////////////////////////
// process the SELECT command
//////////////////////////////////////////////////////////////////////
// @ short distance has slight impact on performance
else if ( bits >= 44 && ( ( cmd[0] & 0xF0 ) == 0xA0 ) )
{
handle_select(STATE_READY);
delimiterNotFound = 1;
} // select command
break;
}
case STATE_REPLY:
{
// this state handles query, query adjust, ack, and select commands
///////////////////////////////////////////////////////////////////////
// process the ACK command
///////////////////////////////////////////////////////////////////////
if ( bits == NUM_ACK_BITS && ( ( cmd[0] & 0xC0 ) == 0x40 ) )
{
#if ENABLE_READS
handle_ack(STATE_ACKNOWLEDGED);
setup_to_receive();
#elif SENSOR_DATA_IN_ID
handle_ack(STATE_ACKNOWLEDGED);
delimiterNotFound = 1; // reset
#else
// this branch for hardcoded query/acks
handle_ack(STATE_ACKNOWLEDGED);
//delimiterNotFound = 1; // reset
setup_to_receive();
#endif
}
//////////////////////////////////////////////////////////////////////
// process the QUERY command
//////////////////////////////////////////////////////////////////////
if ( bits == NUM_QUERY_BITS && ( ( cmd[0] & 0xF0 ) == 0x80 ) )
{
// i'm supposed to stay in state_reply when I get this, but if I'm
// running close to 1.8v then I really need to reset and get in the
// sleep, which puts me back into state_arbitrate. this is complete
// a violation of the protocol, but it sure does make everything
// work better. - polly 8/9/2008
handle_query(STATE_REPLY);
setup_to_receive();
}
//////////////////////////////////////////////////////////////////////
// process the QUERYREP command
//////////////////////////////////////////////////////////////////////
else if ( bits == NUM_QUERYREP_BITS && ( ( cmd[0] & 0x06 ) == 0x00 ) )
{
do_nothing();
state = STATE_ARBITRATE;
setup_to_receive();
} // queryrep command
//////////////////////////////////////////////////////////////////////
// process the QUERYADJUST command
//////////////////////////////////////////////////////////////////////
else if ( bits == NUM_QUERYADJ_BITS && ( ( cmd[0] & 0xF8 ) == 0x48 ) )
{
handle_queryadjust(STATE_REPLY);
delimiterNotFound = 1;
} // queryadjust command
//////////////////////////////////////////////////////////////////////
// process the SELECT command
//////////////////////////////////////////////////////////////////////
else if ( bits >= 44 && ( ( cmd[0] & 0xF0 ) == 0xA0 ) )
{
handle_select(STATE_READY);
delimiterNotFound = 1;
} // select command
else if ( bits >= MAX_NUM_QUERY_BITS && ( ( cmd[0] & 0xF0 ) != 0xA0 ) &&
( ( cmd[0] & 0xF0 ) != 0x80 ) )
{
do_nothing();
state = STATE_READY;
delimiterNotFound = 1;
}
break;
}
case STATE_ACKNOWLEDGED:
{
// responds to query, ack, request_rn cmds
// takes action on queryrep, queryadjust, and select cmds
/////////////////////////////////////////////////////////////////////
// process the REQUEST_RN command
//////////////////////////////////////////////////////////////////////
if ( bits >= NUM_REQRN_BITS && ( cmd[0] == 0xC1 ) )
{
#if 1
handle_request_rn(STATE_OPEN);
setup_to_receive();
#else
handle_request_rn(STATE_READY);
delimiterNotFound = 1;
#endif
}
#if 1
//////////////////////////////////////////////////////////////////////
// process the QUERY command
//////////////////////////////////////////////////////////////////////
if ( bits == NUM_QUERY_BITS && ( ( cmd[0] & 0xF0 ) == 0x80 ) )
{
handle_query(STATE_REPLY);
delimiterNotFound = 1;
}
///////////////////////////////////////////////////////////////////////
// process the ACK command
///////////////////////////////////////////////////////////////////////
// this code doesn't seem to get exercised in the real world. if i ever
// ran into a reader that generated an ack in an acknowledged state,
// this code might need some work.
//else if ( bits == 20 && ( ( cmd[0] & 0xC0 ) == 0x40 ) )
else if ( bits == NUM_ACK_BITS && ( ( cmd[0] & 0xC0 ) == 0x40 ) )
{
handle_ack(STATE_ACKNOWLEDGED);
setup_to_receive();
}
//////////////////////////////////////////////////////////////////////
// process the QUERYREP command
//////////////////////////////////////////////////////////////////////
else if ( bits == NUM_QUERYREP_BITS && ( ( cmd[0] & 0x06 ) == 0x00 ) )
{
// in the acknowledged state, rfid chips don't respond to queryrep
// commands
do_nothing();
state = STATE_READY;
delimiterNotFound = 1;
} // queryrep command
//////////////////////////////////////////////////////////////////////
// process the QUERYADJUST command
//////////////////////////////////////////////////////////////////////
else if ( bits == NUM_QUERYADJ_BITS && ( ( cmd[0] & 0xF8 ) == 0x48 ) )
{
do_nothing();
state = STATE_READY;
delimiterNotFound = 1;
} // queryadjust command
//////////////////////////////////////////////////////////////////////
// process the SELECT command
//////////////////////////////////////////////////////////////////////
else if ( bits >= 44 && ( ( cmd[0] & 0xF0 ) == 0xA0 ) )
{
handle_select(STATE_READY);
delimiterNotFound = 1;
} // select command
//////////////////////////////////////////////////////////////////////
// process the NAK command
//////////////////////////////////////////////////////////////////////
else if ( bits >= 10 && ( cmd[0] == 0xC0 ) )
{
do_nothing();
state = STATE_ARBITRATE;
delimiterNotFound = 1;
}
//////////////////////////////////////////////////////////////////////
// process the READ command
//////////////////////////////////////////////////////////////////////
// warning: won't work for read addrs > 127d
if ( bits == NUM_READ_BITS && ( cmd[0] == 0xC2 ) )
{
handle_read(STATE_ARBITRATE);
state = STATE_ARBITRATE;
delimiterNotFound = 1 ;
}
// FIXME: need write, kill, lock, blockwrite, blockerase
//////////////////////////////////////////////////////////////////////
// process the ACCESS command
//////////////////////////////////////////////////////////////////////
if ( bits >= 56 && ( cmd[0] == 0xC6 ) )
{
do_nothing();
state = STATE_ARBITRATE;
delimiterNotFound = 1 ;
}
#endif
else if ( bits >= MAX_NUM_READ_BITS )
{
state = STATE_ARBITRATE;
delimiterNotFound = 1 ;
}
#if 0
// kills performance ...
else if ( bits >= 44 )
{
do_nothing();
state = STATE_ARBITRATE;
delimiterNotFound = 1;
}
#endif
break;
}
case STATE_OPEN:
{
// responds to query, ack, req_rn, read, write, kill, access,
// blockwrite, and blockerase cmds
// processes queryrep, queryadjust, select cmds
//////////////////////////////////////////////////////////////////////
// process the READ command
//////////////////////////////////////////////////////////////////////
// warning: won't work for read addrs > 127d
if ( bits == NUM_READ_BITS && ( cmd[0] == 0xC2 ) )
{
handle_read(STATE_OPEN);
// note: setup_to_receive() et al handled in handle_read
}
//////////////////////////////////////////////////////////////////////
// process the REQUEST_RN command
//////////////////////////////////////////////////////////////////////
else if ( bits >= NUM_REQRN_BITS && ( cmd[0] == 0xC1 ) )
{
handle_request_rn(STATE_OPEN);
setup_to_receive();
}
//////////////////////////////////////////////////////////////////////
// process the QUERY command
//////////////////////////////////////////////////////////////////////
if ( bits == NUM_QUERY_BITS && ( ( cmd[0] & 0xF0 ) == 0x80 ) )
{
handle_query(STATE_REPLY);
delimiterNotFound = 1;
}
//////////////////////////////////////////////////////////////////////
// process the QUERYREP command
//////////////////////////////////////////////////////////////////////
else if ( bits == NUM_QUERYREP_BITS && ( ( cmd[0] & 0x06 ) == 0x00 ) )
{
do_nothing();
state = STATE_READY;
setup_to_receive();
} // queryrep command
//////////////////////////////////////////////////////////////////////
// process the QUERYADJUST command
//////////////////////////////////////////////////////////////////////
else if ( bits == 9 && ( ( cmd[0] & 0xF8 ) == 0x48 ) )
{
do_nothing();
state = STATE_READY;
delimiterNotFound = 1;
} // queryadjust command
///////////////////////////////////////////////////////////////////////
// process the ACK command
///////////////////////////////////////////////////////////////////////
else if ( bits == NUM_ACK_BITS && ( ( cmd[0] & 0xC0 ) == 0x40 ) )
{
handle_ack(STATE_OPEN);
delimiterNotFound = 1;
}
//////////////////////////////////////////////////////////////////////
// process the SELECT command
//////////////////////////////////////////////////////////////////////
else if ( bits >= 44 && ( ( cmd[0] & 0xF0 ) == 0xA0 ) )
{
handle_select(STATE_READY);
delimiterNotFound = 1;
} // select command
//////////////////////////////////////////////////////////////////////
// process the NAK command
//////////////////////////////////////////////////////////////////////
else if ( bits >= 10 && ( cmd[0] == 0xC0 ) )
{
handle_nak(STATE_ARBITRATE);
delimiterNotFound = 1;
}
break;
}
case STATE_READ_SENSOR:
{
#if SENSOR_DATA_IN_READ_COMMAND
read_sensor(&readReply[0]);
// crc is computed in the read state
RECEIVE_CLOCK;
state = STATE_READY;
delimiterNotFound = 1; // reset
#elif SENSOR_DATA_IN_ID
read_sensor(&ackReply[3]);
RECEIVE_CLOCK;
ackReplyCRC = crc16_ccitt(&ackReply[0], 14);
ackReply[15] = (unsigned char)ackReplyCRC;
ackReply[14] = (unsigned char)__swap_bytes(ackReplyCRC);
state = STATE_READY;
delimiterNotFound = 1; // reset
#endif
break;
} // end case
} // end switch
} // while loop
}
short read_sensor(unsigned char volatile *target)
{
unsigned short enough_power;
if(!is_power_good())
sleep();
P1OUT &= ~RX_EN_PIN; // turn off comparator
// slow down clock
BCSCTL1 = XT2OFF + RSEL3;
DCOCTL = DCO2 + DCO1 + DCO0;
// Power sensor, enable analog in
ADC10AE0 |= (X_INCH + Y_INCH + Z_INCH);
SET_ACCEL_ENABLE_DIR;
TURN_ON_ACCEL_ENABLE;
// set up watchdog interval timer to sleep during settle time
WDTCTL = WDT_MDLY_0_5;
IE1 |= WDTIE;
P1IE = 0;
P2IE = 0;
// a little time for regulator to stabilize active mode current AND
// filter caps to settle. for WDT_MDLY_0_5 * 46, this is slightly less than 10 ms
for ( int k = 0 ; k < 46 ; k++ )
{
#if CHECK_FOR_GOOD_VOLTAGE
//DEBUG_PIN5_HIGH;
if ( k == 1 )
{
//DEBUG_PIN5_HIGH;
enough_power = is_power_good();
//DEBUG_PIN5_LOW;
}
#endif
_BIS_SR(LPM1_bits+GIE);
//DEBUG_PIN5_LOW;
}
IE1 &= ~WDTIE;
#if CHECK_FOR_GOOD_VOLTAGE
// make sure there's enough voltage to generate good samples. samples
// get seriously wacky at ~1.8V, especially the already-noisy Z channel.
// see the accel data sheet for details.
if ( ! enough_power )
{
// low voltage -- don't sample
//DEBUG_PIN5_HIGH;
CLEAR_ACCEL_ENABLE_DIR;
TURN_OFF_ACCEL_ENABLE;
ADC10AE0 &= ~(X_INCH + Y_INCH + Z_INCH);
ADC10CTL0 &= ~ENC;
ADC10CTL1 = 0; // turn adc off
ADC10CTL0 = 0; // turn adc off
//DEBUG_PIN5_LOW;
return 0;
}
#endif
// grab data
for (int i = (DATA_LENGTH_IN_WORDS-1); i >= 0; i--)
{
ADC10CTL0 &= ~ENC; // make sure this is off otherwise settings are locked.
ADC10CTL0 = SREF_0 + ADC10SHT_3 + ADC10ON + ADC10IE;
if (i == 2)
// sample Z channel first, because it is the most noisy
ADC10CTL1 = ADC10DIV_4 + ADC10SSEL_0 + SHS_0 + CONSEQ_0 + Z_INCH;
else if (i == 1)
ADC10CTL1 = ADC10DIV_4 + ADC10SSEL_0 + SHS_0 + CONSEQ_0 + Y_INCH;
else
ADC10CTL1 = ADC10DIV_4 + ADC10SSEL_0 + SHS_0 + CONSEQ_0 + X_INCH;
ADC10CTL0 |= ENC;
ADC10CTL0 |= ADC10SC;
LPM4;
unsigned int k;
if ( i == 0 ) k = 0;
else if ( i == 1 ) k = 2;
else k = 4;
// grab sample and write it to ram
*(target + k + 1 ) = (ADC10MEM & 0xff);
*(target + k) = (ADC10MEM & 0x0300) >> 8;
#if DEBUG_BAD_SAMPLES
if ( i == 0 ) x = ADC10MEM;
else if ( i == 1 ) y = ADC10MEM;
else z = ADC10MEM;
#endif
k += 2;
}
#if DEBUG_BAD_SAMPLES
//#define THRES 50 // about 5% ... never fires
//#define THRES 30 // about 3% ... fires very rarely
//#define THRES 20
#define THRES 10
unsigned short fired = 0;
diff = ((x - lastx) > 0) ? (x - lastx) : (lastx -x);
if ( lastx != 0xffff && diff > THRES )
{
fired = 1;
}
diff = ((y - lasty) > 0) ? (y - lasty) : (lasty -y);
if ( lasty != 0xffff && diff > THRES )
{
fired = 1;
}
diff = ((z - lastz) > 0) ? (z- lastz) : (lastz -z);
if ( lastz != 0xffff && diff > THRES )
{
fired = 1;
}
lastx = x; lasty = y ; lastz = z;
if ( fired ) { DEBUG_PIN5_HIGH; DEBUG_PIN5_LOW; }
#endif
// Power off sensor and adc
CLEAR_ACCEL_ENABLE_DIR;
TURN_OFF_ACCEL_ENABLE;
ADC10AE0 &= ~(X_INCH + Y_INCH + Z_INCH);
ADC10CTL0 &= ~ENC;
ADC10CTL1 = 0; // turn adc off
ADC10CTL0 = 0; // turn adc off
return 1;
}
void read_sensor(unsigned char volatile *target)
{
// turn off comparator
P1OUT &= ~RX_EN_PIN;
// slow down clock
BCSCTL1 = XT2OFF + RSEL1; // select internal resistor (still has effect when
// DCOR=1)
DCOCTL = DCO1+DCO0; // set DCO step.
if(!is_power_good())
sleep();
// Clear out any lingering voltage on the accelerometer outputs
P6SEL = 0;
P6OUT &= ~(ACCEL_X | ACCEL_Y | ACCEL_Z);
P6DIR |= ACCEL_X | ACCEL_Y | ACCEL_Z;
P6DIR &= ~(ACCEL_X | ACCEL_Y | ACCEL_Z);
P1DIR |= ACCEL_POWER;
P1OUT |= ACCEL_POWER;
P6SEL |= ACCEL_X | ACCEL_Y | ACCEL_Z;
// a little time for regulator to stabilize active mode current AND
// filter caps to settle.
for(int i = 0; i < 225; i++);
RECEIVE_CLOCK;
// GRAB DATA
ADC12CTL0 &= ~ENC; // make sure this is off otherwise settings are locked.
ADC12CTL0 = ADC12ON + SHT0_1; // Turn on and set up ADC12
ADC12CTL1 = SHP; // Use sampling timer
ADC12MCTL0 = INCH_ACCEL_X + SREF_0; // Vr+=AVcc=Vreg=1.8V
// ADC12CTL1 = + ADC12SSEL_0 + SHS_0 + CONSEQ_0;
ADC12CTL0 |= ENC;
ADC12CTL0 |= ADC12SC;
while (ADC12CTL1 & ADC12BUSY); // wait while ADC finished work
ackReply[4] = (ADC12MEM0 & 0xff);
ackReply[3] = (ADC12MEM0 & 0x0f00) >> 8; // grab msb bits and store it
// GRAB DATA
ADC12CTL0 &= ~ENC; // make sure this is off otherwise settings are locked.
ADC12CTL0 = ADC12ON + SHT0_1;
ADC12CTL1 = SHP; // Use sampling timer
ADC12MCTL0 = INCH_ACCEL_Y + SREF_0;
ADC12CTL0 |= ENC;
ADC12CTL0 |= ADC12SC;
while (ADC12CTL1 & ADC12BUSY); // wait while ADC finished work
ackReply[6] = (ADC12MEM0 & 0xff);
ackReply[5] = (ADC12MEM0 & 0x0f00) >> 8; // grab msb bits and store it
// GRAB DATA
ADC12CTL0 &= ~ENC; // make sure this is off otherwise settings are locked.
ADC12CTL0 = ADC12ON + SHT0_1;
ADC12CTL1 = SHP;
ADC12MCTL0 = INCH_ACCEL_Z + SREF_0;
ADC12CTL0 |= ENC;
ADC12CTL0 |= ADC12SC;
while (ADC12CTL1 & ADC12BUSY); // wait while ADC finished work
ackReply[8] = (ADC12MEM0 & 0xff);
ackReply[7] = (ADC12MEM0 & 0x0f00) >> 8; // grab msb bits and store it
// Power off sensor and adc
P1DIR &= ~ACCEL_POWER;
P1OUT &= ~ACCEL_POWER;
ADC12CTL0 &= ~ENC;
ADC12CTL1 = 0; // turn adc off
ADC12CTL0 = 0; // turn adc off
// Store sensor read count
sensor_counter++;
ackReply[10] = (sensor_counter & 0x00ff);
ackReply[9] = (sensor_counter & 0xff00) >> 8; // grab msb bits and store it
// turn on comparator
P1OUT |= RX_EN_PIN;
}
void read_sensor(unsigned char volatile *target)
{
// turn off comparator
P1OUT &= ~RX_EN_PIN;
// slow down clock
BCSCTL1 = XT2OFF + RSEL1; // select internal resistor (still has effect when DCOR=1)
DCOCTL = DCO1+DCO0; // set DCO step.
if(!is_power_good())
sleep();
// Clear out any lingering voltage on the accelerometer outputs
ADC10AE0 = 0;
#if(WISP_VERSION == BLUE_WISP || WISP_VERSION == PURPLE_WISP)
P2OUT &= ~(ACCEL_X | ACCEL_Y | ACCEL_Z);
P2DIR |= ACCEL_X | ACCEL_Y | ACCEL_Z;
P2DIR &= ~(ACCEL_X | ACCEL_Y | ACCEL_Z);
#elif(WISP_VERSION == RED_WISP)
P1OUT &= ~(ACCEL_X | ACCEL_Y | ACCEL_Z);
P1DIR |= ACCEL_X | ACCEL_Y | ACCEL_Z;
P1DIR &= ~(ACCEL_X | ACCEL_Y | ACCEL_Z);
#endif
P1DIR |= ACCEL_POWER;
P1OUT |= ACCEL_POWER;
ADC10AE0 |= ACCEL_X | ACCEL_Y | ACCEL_Z;
// a little time for regulator to stabilize active mode current AND
// filter caps to settle.
for(int i = 0; i < 225; i++);
RECEIVE_CLOCK;
// GRAB DATA
ADC10CTL0 &= ~ENC; // make sure this is off otherwise settings are locked.
ADC10CTL0 = SREF_0 + ADC10SHT_1 + ADC10ON;
ADC10CTL1 = ADC10DIV_2 + ADC10SSEL_0 + SHS_0 + CONSEQ_0 + INCH_ACCEL_X;
ADC10CTL0 |= ENC;
ADC10CTL0 |= ADC10SC;
while (ADC10CTL1 & ADC10BUSY); // wait while ADC finished work
*(target+1) = (ADC10MEM & 0xff);
// grab msb bits and store it
*(target) = (ADC10MEM & 0x0300) >> 8;
// GRAB DATA
ADC10CTL0 &= ~ENC; // make sure this is off otherwise settings are locked.
ADC10CTL0 = SREF_0 + ADC10SHT_1 + ADC10ON;
ADC10CTL1 = ADC10DIV_2 + ADC10SSEL_0 + SHS_0 + CONSEQ_0 + INCH_ACCEL_Y;
ADC10CTL0 |= ENC;
ADC10CTL0 |= ADC10SC;
while (ADC10CTL1 & ADC10BUSY); // wait while ADC finished work
*(target+3) = (ADC10MEM & 0xff);
// grab msb bits and store it
*(target+2) = (ADC10MEM & 0x0300) >> 8;
// GRAB DATA
ADC10CTL0 &= ~ENC; // make sure this is off otherwise settings are locked.
ADC10CTL0 = SREF_0 + ADC10SHT_1 + ADC10ON;
ADC10CTL1 = ADC10DIV_2 + ADC10SSEL_0 + SHS_0 + CONSEQ_0 + INCH_ACCEL_Z;
ADC10CTL0 |= ENC;
ADC10CTL0 |= ADC10SC;
while (ADC10CTL1 & ADC10BUSY); // wait while ADC finished work
*(target+5) = (ADC10MEM & 0xff);
// grab msb bits and store it
*(target+4) = (ADC10MEM & 0x0300) >> 8;
// Power off sensor and adc
P1DIR &= ~ACCEL_POWER;
P1OUT &= ~ACCEL_POWER;
ADC10CTL0 &= ~ENC;
ADC10CTL1 = 0; // turn adc off
ADC10CTL0 = 0; // turn adc off
// Store sensor read count
sensor_counter++;
*(target+7) = (sensor_counter & 0x00ff);
// grab msb bits and store it
*(target+6) = (sensor_counter & 0xff00) >> 8;
// turn on comparator
P1OUT |= RX_EN_PIN;
}
