Hello All,

 

I have been having good momentum in the past few weeks. I was able to get the FRAM I2C to work. You can see the example code below:

 

/********************************************
writeSample
- Writes one 16 bit (two byte) sample to FRAM
- Uses FRAM automatic incrementing
- Assumes that A1 and A0 lines are set to logic zero
********************************************/
void writeSample(uint32 addr, uint16 sample)
{
  uint8 slaveAddr = 0x50;
  uint8 pageBit = 0;
  uint8 msb = 0;
  uint8 lsb = 0;

  //Step 1: Break address into components, set the slave address
  pageBit = HI16(addr) & 1U;
  msb = HI8(LO16(addr));
  lsb = LO8(LO16(addr));
  slaveAddr |= pageBit;

  //Step 2: Write the slave address/page bit & address MSB/LSB to FRAM
  I2C_I2CMasterSendStart(slaveAddr, 0);
  I2C_I2CMasterWriteByte(msb);
  I2C_I2CMasterWriteByte(lsb);

  //Step 3: Write the MSB then LSB of the sample to FRAM
  I2C_I2CMasterWriteByte(HI8(sample));
  I2C_I2CMasterWriteByte(LO8(sample));
  I2C_I2CMasterSendStop();
}

 

I recently hit a stumbling block though. The amount of data transferred off of the FRAM is so large that my computer has difficulty processing all of the USB-UART data! I've been hoping to get around this by using a Python script with PySerial:

 

import sys

import csv

import serial

 

#Setup serial port

ser = serial.Serial(port='COM22', baudrate=115200, timeout=60)

 

#Read

myData = ser.readline()

ser.close()  

 

So far, this has kind of been working. I will need to determine how I can get around this stumbling block. I hope to have a more interesting blog post next time with some sleep data.