A library for Rust to generate NVS partitions for ESP32.
See examples/write_simple.rs.
- Make
NvsPartitionby callingNvsPartition::new - call
NvsPartition::add_primitive_entryto add primitive (u8, i8, u16, i16, u32, i32, u64, i64) values. Both namespace and key are must be represented byNvsKeytype. (NvsKeyis just a type alias ofheapless::String<15>, because ESP32 NVS supports 15 + 1 (null terminator) string for namespace and key.) - call
NvsPartition::add_string_entryto add string values. - call
NvsPartition::add_binary_entryto add BLOBs. - call
NvsPartition::writeto write out the NVS partition content to a file.
use esp32_nvs::{NvsKey, NvsPartition};
use std::{fs::File, io::*, str::FromStr};
fn main() -> Result<()> {
let mut file = File::create("output.bin")?;
let mut partition: NvsPartition = NvsPartition::new();
let namespace = NvsKey::from_str("hoge").unwrap();
let mut long_data = [0u8; 4097];
for i in 0..long_data.len() {
long_data[i] = (i & 0xff) as u8;
}
let mut long_string = String::with_capacity((126 - 10 - 1) * 32 - 1);
for i in 0..long_string.capacity() {
long_string.push(char::from_u32(0x20 + (i % 0x40) as u32).unwrap());
}
partition.add_primitive_entry(
&namespace,
&NvsKey::from_str("fuga").unwrap(),
0xdeadbeefu32,
);
partition
.add_string_entry(
&namespace,
&NvsKey::from_str("long_value").unwrap(),
"string",
)
.unwrap();
partition
.add_binary_entry(
&namespace,
&NvsKey::from_str("long_long_value").unwrap(),
&long_data,
)
.unwrap();
partition
.add_string_entry(
&namespace,
&NvsKey::from_str("long_str").unwrap(),
&long_string,
)
.unwrap();
partition
.add_string_entry(
&namespace,
&NvsKey::from_str("long_str2").unwrap(),
&long_string,
)
.unwrap();
partition.write(&mut file)?;
Ok(())
}This library is available under the MIT License. See also LICENSE file.