31 lines
780 B
Markdown
31 lines
780 B
Markdown
|
# I2C FRAM driver
|
||
|
|
|
||
|
|
This library provides a driver for this FRAM part: https://www.adafruit.com/products/1895
|
||
|
|
|
||
|
|
The memory is accessed one byte at a time. The library provides a utility functions
|
||
|
|
to write an entire buffer.
|
||
|
|
|
||
|
|
## Reading/writing byte
|
||
|
|
|
||
|
|
```
|
||
|
|
let addr = 100
|
||
|
|
i2c_fram.writeByte(addr, 42)
|
||
|
|
let val = i2c_fram.readByte(addr)
|
||
|
|
console.log(`${addr}: ${val}`)
|
||
|
|
```
|
||
|
|
|
||
|
|
## Reading/writing a buffer
|
||
|
|
|
||
|
|
This code will log current time and acceleration in X axis every second.
|
||
|
|
|
||
|
|
```
|
||
|
|
let bufSz = 8
|
||
|
|
for (let addr = 0; addr < 0x8000; addr += bufSz) {
|
||
|
|
let buf = pins.createBuffer(bufSz)
|
||
|
|
buf.setNumber(NumberFormat.Int32LE, 0, input.runningTime())
|
||
|
|
buf.setNumber(NumberFormat.Int32LE, 4, input.acceleration(Dimension.X))
|
||
|
|
i2c_fram.writeBuffer(addr, buf)
|
||
|
|
basic.pause(1000)
|
||
|
|
}
|
||
|
|
```
|