I am using TSYS01 with my Arduino nano using the SPI.
I am a beginner and it is my first time dealing with SPI. I googled the stuff on SPI etc and finally came up with me code that is mentioned below but I do not get anything out of it. I am sure the hardware connections are fine.
I start the conversion, and display the received conversion result on tera term. The code prints 0 all the time. The code is given below. Please help what I am doing wrong and how to fix that:
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*/
// the sensor communicates using SPI, so include the library:
#include <SPI.h>
// pins used for the connection with the sensor
const int chipSelectPin = 7; //pin 7 is Chip select1 as there are two sensors on my board
const int chipSelectPin2 = 6; //pin 6 is Chip select2 as there are two sensors on my board
const int protocolSelect = 8; // PS pin
unsigned int data =0; // ADC conversion data
//int data1 = 0; // PROM received data
//int data2 = 0;
//int data3 = 0;
//int data4 = 0;
void setup() {
Serial.begin(9600);
// start the SPI library:
SPI.begin();
SPI.setDataMode(2);
SPI.setClockDivider(SPI_CLOCK_DIV2);
SPI.setBitOrder(LSBFIRST);
pinMode(chipSelectPin, OUTPUT);
pinMode(chipSelectPin2, OUTPUT);
pinMode(protocolSelect, OUTPUT);
delay(10);
}
void loop() {
digitalWrite(protocolSelect, LOW);
digitalWrite(chipSelectPin, LOW);
digitalWrite(chipSelectPin2, HIGH);
SPI.transfer(0x1E); //reset temp sensor
delay (10);
SPI.transfer(0x48); //Start ADC conversion
delay(10);
data = SPI.transfer(0x00); // read ADC conversion result
delay(100);
Serial.print("I received: ");
Serial.println(data, HEX);
digitalWrite(chipSelectPin, HIGH);
digitalWrite(protocolSelect, HIGH);
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Post a connection list that shows all your connections from arduino to the chip (or a hand drawn schematic of your wiring photographed with a cell phone)
This is not what I asked for.
Reread my last post.
This is from the dsta sheet .This only shows the chip connections.
What I need yo know ( as I said), is WHICH arduino pins did you connect to WHICH pins on the chip.
Got a link to TSYS01?
One thing missing is that you need to set the SPI SS pin, 10 on an Uno, to Output, so that the Uno is SPI master. If the pin goes low, and undefined pins are inputs by default after a reset (chip feature), the pin will float. If it goes low it becomes an SPI slave.
Typically SPI devices use chip select (or slave select), goes low before the SPI.transfer, then high again after.
You don't need I/O pin (d8) for PS (TSYS01-pin-16) That pin is SPI/I2C select and should be tied to ground for SPI. You are not going to switch from SPI to I2C in the middle of your program so just connect PS to ground. You should use arduino pin-10 for your primary chip select (CSB1). Also your schematic isn't exactly correct is it? You are showing two CSB pins implying you have two chips (each chip only has one CSB , pin-2). You should redraw it showing two chips The schematic you already posted for two chips has too much information. We only want exactly what you did here with one small change: show two chips and show the two arduino chip selects (pin-10 =primaray,pin, one of the pins in the group 6-9 as the secondary chip select, ie: d6)
Get rid of this (tie pin-16 to ground)
const int protocolSelect = 8; // PS pin
Change this:
const int chipSelectPin = 7; //pin 7 is Chip select1 as there are two sensors on my board
I am attaching the schematics with both the chips before and after the recommendations that you made. I am not using my chip 1 at the moment. I want data only from my chip 2 (primary slave, CSB pin attached to pin 10 of Arduino as per your recommendation).
After making modifications that you suggested, I am still getting 0 as my output. I have made changes to the code as per your recommendations.
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/*
CSB2: pin 10 // primary SS
MOSI: pin 11
MISO: pin 12
SCK: pin 13
CSB1: pin 6 //secondary SS
*/
// the sensor communicates using SPI, so include the library:
#include <SPI.h>
// pins used for the connection with the sensor
const int chipSelectPin = 10; //pin 10 is Chip select1 as there are two sensors on my board
const int chipSelectPin2 = 6; //pin 6 is Chip select2 as there are two sensors on my board
unsigned long data =0; // ADC conversion data
void setup() {
Serial.begin(9600);
// start the SPI library:
SPI.begin();
SPI.setDataMode(2);
SPI.setClockDivider(SPI_CLOCK_DIV2);
SPI.setBitOrder(LSBFIRST);
pinMode(chipSelectPin, OUTPUT);
pinMode(chipSelectPin2, OUTPUT);
// initalize the data ready and chip select pins:
delay(10);
}
void loop() {
//Select High Resolution Mode
digitalWrite(chipSelectPin, LOW);
digitalWrite(chipSelectPin2, HIGH);
SPI.transfer(0x1E);
delay (100);
SPI.transfer(0x48);
delay(100);
data = SPI.transfer(0x00);
delay(1000);
Serial.print("I received: ");
Serial.println(data, HEX);
digitalWrite(chipSelectPin, HIGH);
}
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The second schematic is much easier to follow. Just the essentials.
It's looking like the issue may be the TSYS01 communication protocol. Where did you get the code you are using to talk to it?
and had a look at the datasheet to see how to reset the TSYS01, start conversion and then read the results. This is what I am attempting to do with my code.
SPI.transfer(0x1E); // reset the chip
delay (100);
SPI.transfer(0x48); // start temp conversion
delay(100);
data = SPI.transfer(0x00);// read the conversion results
Attached is a working sketch for five digital pots . It doesn't use Clockdivide or setSPImMode and it uses MSBFirst so I have to ask
why Mode 2? , Why LSBFIRST ? and why Clockdiiveby 2 ?
Look at the timing diagrams on your datasheet just to confirm you have all that correct and try experimenting with different changes of the three parameters I asked about. Google to see if you can find any example code for that chip (I couldn't).
Read Page 8 about the temp calculation . Look at the algorithm shown and verify you are doing that. Look at the timing diagram and check your timing. Read the part about Internal/External sensor and ask yourself if you have that jumper on for Internal sensor.
