Hello,
I'm trying to read the device ID in FM25V20A-PG by sending 1001 1111b using an Arduino nano.
The problem is that all I get back is 0xFF on the MISO line. Can some help me find a solution?
I have all my connections according to the datasheet. I have pin WP and DNU connected to VDD. I also tried changing the SPI frequency speed but nothing helped.
Settings in my code:
SPI_MODE0
MSBFIRST
Here is my Arduino code: (In the code I'm trying to see the first 3 bytes of the device's ID)
#include<SPI.h>
const int chipselect=10;
const byte RDID=0b10011111;
byte v=0x00;
void setup() {
// put your setup code here, to run once:
Serial.begin(9600);
pinMode(chipselect, OUTPUT);
digitalWrite(chipselect, HIGH);
Serial.print("Chip Select: "); Serial.println( digitalRead(chipselect), BIN); //To show Chip select pint status in the serial monitor
delay(20);
SPI.begin();
SPI.setBitOrder(MSBFIRST);
SPI.setDataMode(SPI_MODE0);
SPI.setClockDivider(SPI_CLOCK_DIV128);
digitalWrite(chipselect, LOW);
delay(1);
Serial.print("Chip Select: "); Serial.println( digitalRead(chipselect), BIN); //To show Chip select pint status in the serial monitor
v=SPI.transfer(RDID);
Serial.println(v, BIN);
v=SPI.transfer(0x00);
Serial.println(v, BIN);
v=SPI.transfer(0x00);
Serial.println(v, BIN);
v=SPI.transfer(0x00);
Serial.println(v, BIN);
digitalWrite(chipselect, HIGH);
Serial.print("Chip Select: "); Serial.println( digitalRead(chipselect), BIN); //To show Chip select pint status in the serial monitor
SPI.end();
}
void loop() {
// put your main code here, to run repeatedly:
}
Here is the output I get
