// deactivate the given channel...note: stops data colleciton to issue its commands
// N is the channel number: 1-8
//
void ADS1299::deactivateChannel(int N)
{
byte reg, config;
//check the inputs
if ((N < 1) || (N > 8)) return;
//proceed...first, disable any data collection
SDATAC(); delay(1); // exit Read Data Continuous mode to communicate with ADS
//shut down the channel
N = constrain(N-1,0,7); //subtracts 1 so that we're counting from 0, not 1
reg = CH1SET+(byte)N; // select the current channel
config = RREG(reg); delay(1); // get the current channel settings
bitSet(config,7); // set bit7 to shut down channel
if (use_N_inputs) bitClear(config,3); // clear bit3 to disclude from SRB2 if used
WREG(reg,config); delay(1); // write the new value to disable the channel
//remove the channel from the bias generation...
reg = BIAS_SENSP; // set up to disconnect the P inputs from Bias generation
config = RREG(reg); delay(1); //get the current bias settings
bitClear(config,N); //clear this channel's bit to remove from bias generation
WREG(reg,config); delay(1); //send the modified byte back to the ADS
reg = BIAS_SENSN; // set up to disconnect the N inputs from Bias generation
config = RREG(reg); delay(1); //get the current bias settings
bitClear(config,N); //clear this channel's bit to remove from bias generation
WREG(reg,config); delay(1); //send the modified byte back to the ADS
};
//Configure the test signals that can be inernally generated by the ADS1299
void ADS1299::configureInternalTestSignal(byte amplitudeCode, byte freqCode)
{
if (amplitudeCode == ADSTESTSIG_NOCHANGE) amplitudeCode = (RREG(CONFIG2) & (0b00000100));
if (freqCode == ADSTESTSIG_NOCHANGE) freqCode = (RREG(CONFIG2) & (0b00000011));
freqCode &= 0b00000011; //only the last two bits are used
amplitudeCode &= 0b00000100; //only this bit is used
byte message = 0b11010000 | freqCode | amplitudeCode; //compose the code
WREG(CONFIG2,message); delay(1);
}
// USE THIS METHOD IF YOU WANT TO CONTROL THE SIGNAL INCLUSION IN SRB AND BIAS GENERATION
void ADS1299::activateChannel(int N,byte gainCode,byte inputCode,boolean useInBias)
{
byte reg, config;
//check the inputs
if ((N < 1) || (N > 8)) return;
//proceed...first, disable any data collection
SDATAC(); delay(1); // exit Read Data Continuous mode to communicate with ADS
//active the channel using the given gain. Set MUX for normal operation
//see ADS1299 datasheet, PDF p44
N = constrain(N-1,0,7); //shift down by one
config = 0b00000000; //left-most zero (bit 7) is to activate the channel
gainCode = gainCode & 0b01110000; //bitwise AND to get just the bits we want and set the rest to zero
config = config | gainCode; //bitwise OR to set just the gain bits high or low and leave the rest
inputCode = inputCode & 0b00000111; //bitwise AND to get just the bits we want and set the rest to zero
config = config | inputCode; //bitwise OR to set just the gain bits high or low and leave the rest
if ((use_SRB2[N]) && useInBias)config |= 0b00001000; //set the SRB2 flag if you plan to use it
WREG(CH1SET+(byte)N,config); delay(1);
//add this channel to the bias generation
//see ADS1299 datasheet, PDF p44
if(useInBias){
reg = BIAS_SENSP; // set up to connect the P inputs for bias generation
config = RREG(reg); //get the current bias settings
bitSet(config,N); //set this channel's bit to add it to the bias generation
WREG(reg,config); delay(1); //send the modified byte back to the ADS
reg = BIAS_SENSN; // set up to connect the N input for bias generation
config = RREG(reg); //get the current bias settings
bitSet(config,N); //set this channel's bit to add it to the bias generation
WREG(reg,config); delay(1); //send the modified byte back to the ADS
}
// // Now, these actions are necessary whenever there is at least one active channel
// // though they don't strictly need to be done EVERY time we activate a channel.
// // just once after the reset.
//activate SRB1 as the Negative input for all channels, if needed
// setSRB1(use_SRB1());
setSRB1(false);
//Finalize the bias setup...activate buffer and use internal reference for center of bias creation, datasheet PDF p42
WREG(CONFIG3,0b11101100); delay(1); // THIS COULD MOVE TO THE INITIALIZATION
};
// Register Read/Write Commands
byte ADS1299::getDeviceID() { // simple hello world com check
byte data = RREG(0x00);
if(verbosity){ // verbosity otuput
Serial.print("Device ID ");
printHex(data);
Serial.println();
}
return data;
}
static void _stp_print_regs(struct pt_regs * regs)
{
_stp_printf("RIP: %016lx\nRSP: %016lx\n",
RREG(ip, regs), RREG(sp, regs));
_stp_printf("RAX: %016lx RBX: %016lx RCX: %016lx\n",
RREG(ax, regs), RREG(bx, regs), RREG(cx, regs));
_stp_printf("RDX: %016lx RSI: %016lx RDI: %016lx\n",
RREG(dx, regs), RREG(si, regs), RREG(di, regs));
_stp_printf("RBP: %016lx R08: %016lx R09: %016lx\n",
RREG(bp, regs), regs->r8, regs->r9);
_stp_printf("R10: %016lx R11: %016lx R12: %016lx\n",
regs->r10, regs->r11, regs->r12);
_stp_printf("R13: %016lx R14: %016lx R15: %016lx\n",
regs->r13, regs->r14, regs->r15);
}
