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Hi ,
We have been trying to interface PGA460PSM-EVM with Arduino MEGA . We are planning to use 6 PGA460s and recieved all 6 of them. We tried the following procedures but not able to communicate with the pga460 module.
Our connections as follows
Arduino MEGA <===> PGA460PSM-EVM
TX1<===> RX ( A voltage divider which converts 5V logic to 3.3V logic
RX1 <===> TX (direct connection)
PWR <===>12V 1A supply
GND PGA460 <===>GND MEGA <===> POWER GND (common ground for all)
SCK pin is grounded with 10k resistor
The TEST pin is floating assuming the PGA460 works in 3.3V logic state .
At first
1. we tried using the ported energia libraries for arduino mega provided by Mr Akeem Whitehead in this link unfortunately we got
ERROR - did not recieve measurement results...
2. We then tried out this following code
//note: minimum requirement example used to send a burst/listen command to PGA460
//cmd 0 - p1 burst listen
byte buf0[4] = {0x55, 0x00, 0x01, 0xFE};
//cmd 1 - p2 burst listen
byte buf1[4] = {0x55, 0x01, 0x01, 0xFD};
//cmd 5 - ultrasonic measurement (assume UART_ADDR=0)
byte buf5[4] = {0x55, 0x05, 0xFA}; //change
//cmd 10 - register write decple to time of 4.096ms
byte buf10[5] = {0x55, 0x0A, 0x26, 0x00, 0xCF};
//cmd 17 - broadcast p1 burst listen
byte buf17[4] = {0x55, 0x11, 0x01, 0xED};
//cmd 19 - broadcast p1 listen only
byte buf19[4] = {0x55, 0x13, 0x01, 0xEB};
//cmd 25 - broadcast bulk threshold write
byte buf25[35] = {0x55, 0x19, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 0x84, 0x21, 0x08, 0x42, 0x10, 0x80, 0x80, 0x80, 0x80, 0x00, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 0x84, 0x21, 0x08, 0x42, 0x10, 0x80, 0x80, 0x80, 0x80, 0x00, 0x7C};
unsigned char data;
const int buttonPin = 2; // the number of the pushbutton pin
const int ledPin = 13; // the number of the LED pin
int buttonState = 0; // variable for reading the pushbutton status
void setup() {
pinMode(ledPin, OUTPUT);
pinMode(buttonPin, INPUT_PULLUP);
delay(1000);
// put your setup code here, to run once:
Serial.begin(19200);
Serial1.begin(19200,SERIAL_8N2); // initialize PGA460 UART serial channel SERIAL_8N2
delay(1000);
//assume UART_ADDR=0
//bulk threshold write mid-code values to clear THR_CRC_ERR
Serial1.write(buf25, sizeof(buf25));
delay(100);
// set UART_ADDR=0's time decouple to 4.096ms
Serial1.write(buf10, sizeof(buf10));
delay(100);
}
void loop() {
// put your main code here, to run repeatedly:
// check if the pushbutton is pressed.
while (digitalRead(buttonPin) == LOW){}
// broadcast p1 burst+listen (non-dependent on UART_ADDR)
Serial1.write(buf17, sizeof(buf17));
// delay by 100ms
delay(100);
//[TODO] print ultrasonic measurement results on terminal
// read back ultrasonic meas results from UART_ADDR=0
Serial1.write(buf5, sizeof(buf5));//Serial1
data = Serial1.read();
Serial.println(data);
// toggle red LED
digitalWrite(ledPin, !(digitalRead(ledPin))); // turn the LED on (HIGH is the voltage level)
// repeat loop every second
delay (1000);
}
But we had 255 as output in our serial monitor ( even if the wires are removed ) , we think those are garbage values .
3. We just wanted to confirm if there is a communication between PGA460 and Arduino so we used the following example code .
unsigned char WriteByteArray[4] = { 0x55, 0x09, 0x1B, 0xDB };
unsigned char ReadByte1;
unsigned char ReadByte2;
unsigned char ReadByte3;
void setup()
{
Serial.begin(115200);
Serial1.begin(115200, SERIAL_8N2);
}
void loop()
{
Serial1.write(WriteByteArray,sizeof(WriteByteArray));
Serial1.flush();
ReadByte1 = Serial1.read();
ReadByte2 = Serial1.read();
ReadByte3 = Serial1.read();
Serial.println("ReadByte1 = ");
Serial.println(ReadByte1);
Serial.println("ReadByte2 = ");
Serial.println(ReadByte2);
Serial.println("ReadByte3 = ");
Serial.println(ReadByte3);
delay(1000);
}Again we got 255 in ReadBytes 1 , 2 and 3 . Can you please guide us in establishing a communication? Akeem Whitehead1
Let me try to be clear now,
I do not want any confusion with respect to the voltage conversion. So I am using Seeeduino xiao microcontroller (has 3.3V logic pin UART).
So my connections are as follows ,
Sensor pga460<======> Seeeduino xiao uC
TX<====>RX
RX<====>TX
SCLK<===>pulled down 10K common GND
xiao GND<====> seeeduino GND <====> 12Vdc GND (common GND)
PWR of pga460<=====> 12Vdc
to be noted that The TX pin of pga460 module shows no square waves when probed with CRO
The RX pin of pga460 recieves the following signal in the picture
My TX pin of pga460 is always idle low why?
(It will also be very helpful if you can tell me the peak response hours of TI)
Can you please tell me what protocol pga460psm evm works by factory default?
The following is my code
/*The PGA460 should return three values when using this command:
•Diagnostic field (0x40) if master transmit was successful
•Register address value
•PGA460 generated checksum*/
unsigned char WriteByteArray[4] = { 0x55, 0x09, 0x2B, 0xDB };
unsigned char ReadByte1;
unsigned char ReadByte2;
unsigned char ReadByte3;
void setup()
{
SerialUSB.begin(9600);
Serial1.begin(9600,SERIAL_8N2);//SERIAL_8N2
}
void loop()
{
Serial1.write(WriteByteArray,sizeof(WriteByteArray));
Serial1.flush();
ReadByte1 = Serial1.read();
ReadByte2 = Serial1.read();
ReadByte3 = Serial1.read();
SerialUSB.println("ReadByte1 = ");
SerialUSB.println(ReadByte1);
SerialUSB.println("ReadByte2 = ");
SerialUSB.println(ReadByte2);
SerialUSB.println("ReadByte3 = ");
SerialUSB.println(ReadByte3);
}
Hi,
SCLK can be pulled down, but it is not necessary. Questions posted in the sensing forum are most likely to reply on week days between 8am and 6pm CST/MST.
From thread 3192762 mentioned previously:
Have you verified that the sync frame is sending properly? If there is an issue with this, the PGA460 will not respond.
Regards,
Gabriel
That is correct. The 2.3V seen on the RX pin is normal when disconnected. It should be near IOREG when driven.
Here is an example working UART communication with the data you are sending:
In the PGA460EVM GUI 09 2B CB was manually sent, preceded by the 0x55 sync field. Have you tried 1 stop and 2 stop bits?
Are you able to run the example found in thread https://e2e.ti.com/support/sensors/f/1023/p/840688/3192762?
Regards,
Gabriel
See pages 32 and 33 of the PGA460 datasheet for details on calculating the checksum. The sync field is not included in the TX checksum, and the diagnostic field is included in the RX checksum.
You can check the calculation using the PGA460-Q1EVM GUI. Navigate to the 'Interface Mode' page and check the UART settings, then you can type in the address and data and it will calculate the checksum. The EVM itself does not need to be connected for this.
Example:
Regards,
Gabriel
Thank you so much , checksum was the problem. We calculated using the GUI . We need to know how to calibrate the PGA460 for UTR-1440K-TT-R (default transducer) . I tried to use the following thresholds, (Taken from )PGA460-Q1: PGA460-Q1 and Arduino - Sensors forum - Sensors - TI E2E support forums
Part Number: PGA460-Q1 Other Parts Discussed in Thread: ENERGIA , PGA460 , PGA460PSM-EVM , MSP-EXP430F5529LP Hi there,
I need Arduino code for try PGA460 ultrasonic
Can I have any link briefly explaning about all parameters used here! (pga460q1 datasheet doesnot state any parameters in brief)
/* UTR-1440K-TT-R transducer example register configuration byte USER_DATA1 = 0x00 byte USER_DATA2 = 0x00 byte USER_DATA3=0x00 byte USER_DATA4=0x00 byte USER_DATA5=0x00 byte USER_DATA6=0x00 byte USER_DATA7=0x00 byte USER_DATA8=0x00 byte USER_DATA9=0x00 byte USER_DATA10=0x00 byte USER_DATA11=0x00 byte USER_DATA12=0x00 byte USER_DATA13=0x00 byte USER_DATA14=0x00 byte USER_DATA15=0x00 byte USER_DATA16=0x00 byte USER_DATA17=0x00 byte USER_DATA18=0x00 byte USER_DATA19=0x00 byte USER_DATA20=0x00 byte TVGAIN0=0x9D byte TVGAIN1=0xEE byte TVGAIN2=0xEF byte TVGAIN3=0x2D byte TVGAIN4=0xB9 byte TVGAIN5=0xEF byte TVGAIN6=0xDC byte INIT_GAIN=0x03 byte FREQUENCY=0x32 byte DEADTIME=0x80 byte PULSE_P1=0x12 byte PULSE_P2=0x12 byte CURR_LIM_P1=0x72 byte CURR_LIM_P2=0x32 byte REC_LENGTH=0x09 byte FREQ_DIAG=0x00 byte SAT_FDIAG_TH=0xEE byte FVOLT_DEC=0x7C byte DECPL_TEMP=0x8F byte DSP_SCALE=0x00 byte TEMP_TRIM=0x00 byte P1_GAIN_CTRL=0x29 byte P2_GAIN_CTRL=0x29 byte EE_CRC=0x76 byte EE_CNTRL=0x04 byte P1_THR_0=0x41 byte P1_THR_1=0x11 byte P1_THR_2=0x11 byte P1_THR_3=0x10 byte P1_THR_4=0xFF byte P1_THR_5=0xFF byte P1_THR_6=0x00 byte P1_THR_7=0x01 byte P1_THR_8=0xF8 byte P1_THR_9=0x20 byte P1_THR_10=0xC6 byte P1_THR_11=0x30 byte P1_THR_12=0x38 byte P1_THR_13=0x50 byte P1_THR_14=0x80 byte P1_THR_15=0x00 byte P2_THR_0=0x41 byte P2_THR_1=0x11 byte P2_THR_2=0x11 byte P2_THR_3=0x10 byte P2_THR_4=0xFF byte P2_THR_5=0xFF byte P2_THR_6=0x00 byte P2_THR_7=0x01 byte P2_THR_8=0xF8 byte P2_THR_9=0x20 byte P2_THR_10=0xC6 byte P2_THR_11=0x30 byte P2_THR_12=0x38 byte P2_THR_13=0x50 byte P2_THR_14=0x80 byte P2_THR_15=0x00 */ The following were not configured //byte BPF_A2_MSB=0x89 //byte BPF_A2_LSB=0x52 //byte BPF_A3_MSB=0xFC //byte BPF_A3_LSB=0xCE //byte BPF_B1_MSB=0x01 //byte BPF_B1_LSB=0x99 //byte LPF_A2_MSB=0x7F //byte LPF_A2_LSB=0x33 //byte LPF_B1_MSB=0x00 //byte LPF_B1_LSB=0x67 //byte TEST_MUX=0x00 //byte DEV_STAT0=0x80 //byte DEV_STAT1=0x00 //byte THR_CRC=0xF9
Can you please let us know why the sensor is returning distance values even if no objects are present?
Does the user data register have something to do with transducer configuration?
BPF , LPF and other registers were not configured are they essential?
Thank you
