66 lines
2 KiB
Rust
66 lines
2 KiB
Rust
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use core::ffi::{c_int, c_uchar};
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pub const EEPROM_STORAGE_SPACE_START: c_int = 16;
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extern "C" {
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#[link_name = "arduboy_eeprom_read"]
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fn arduboy_eeprom_read_raw(idx: c_int) -> c_uchar;
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#[link_name = "arduboy_eeprom_update"]
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fn arduboy_eeprom_update_raw(idx: c_int, val: c_uchar);
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#[link_name = "arduboy_eeprom_write"]
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fn arduboy_eeprom_write_raw(idx: c_int, val: c_uchar);
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#[link_name = "arduboy_eeprom_get"]
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fn arduboy_eeprom_get_raw(idx: c_int) -> c_uchar;
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#[link_name = "arduboy_eeprom_put"]
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fn arduboy_eeprom_put_raw(idx: c_int, val: c_uchar);
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}
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///This is the struct to interact in a save way with the EEPROM C++ library.
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pub struct EEPROM {
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start_c1: i16,
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start_c2: i16,
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pub idx: i16,
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}
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impl EEPROM {
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pub const fn new(mut idx: i16) -> EEPROM {
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if idx > 950 {
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idx = 0
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}
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EEPROM {
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start_c1: EEPROM_STORAGE_SPACE_START + idx,
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start_c2: EEPROM_STORAGE_SPACE_START + idx + 1,
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idx: EEPROM_STORAGE_SPACE_START + idx + 2,
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}
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}
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pub fn init(&self) {
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let c1 = self.read_start_c1();
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let c2 = self.read_start_c2();
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if c1 != b'Z' || c2 != b'D' {
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self.update(b'M');
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self.update(b'V');
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self.update(0);
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};
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}
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pub fn read(&self) -> u8 {
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unsafe { arduboy_eeprom_read_raw(self.idx) }
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}
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fn read_start_c1(&self) -> u8 {
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unsafe { arduboy_eeprom_read_raw(self.start_c1) }
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}
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fn read_start_c2(&self) -> u8 {
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unsafe { arduboy_eeprom_read_raw(self.start_c2) }
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}
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pub fn update(&self, val: u8) {
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unsafe { arduboy_eeprom_update_raw(self.idx, val) }
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}
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pub fn write(&self, val: u8) {
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unsafe { arduboy_eeprom_write_raw(self.idx, val) }
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}
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pub fn get(&self, buffer: &mut u8) {
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*buffer = unsafe { arduboy_eeprom_get_raw(self.idx) }
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}
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pub fn put(&self, val: u8) {
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unsafe { arduboy_eeprom_put_raw(self.idx, val) }
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}
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}
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