ardupilot/libraries/AP_HAL_AVR_SITL/Storage.cpp

84 lines
1.7 KiB
C++

#include <AP_HAL.h>
#if CONFIG_HAL_BOARD == HAL_BOARD_AVR_SITL
#include <assert.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include "Storage.h"
using namespace AVR_SITL;
void SITLEEPROMStorage::_eeprom_open(void)
{
if (_eeprom_fd == -1) {
_eeprom_fd = open("eeprom.bin", O_RDWR|O_CREAT, 0777);
assert(ftruncate(_eeprom_fd, 4096) == 0);
}
}
uint8_t SITLEEPROMStorage::read_byte(uint16_t loc)
{
uint8_t value;
assert(loc < 4096);
_eeprom_open();
assert(pread(_eeprom_fd, &value, 1, loc) == 1);
return value;
}
uint16_t SITLEEPROMStorage::read_word(uint16_t loc)
{
uint16_t value;
assert(loc < 4096);
_eeprom_open();
assert(pread(_eeprom_fd, &value, 2, loc) == 2);
return value;
}
uint32_t SITLEEPROMStorage::read_dword(uint16_t loc)
{
uint32_t value;
assert(loc < 4096);
_eeprom_open();
assert(pread(_eeprom_fd, &value, 4, loc) == 4);
return value;
}
void SITLEEPROMStorage::read_block(void *dst, uint16_t src, size_t n)
{
assert(src < 4096 && src + n < 4096);
_eeprom_open();
assert(pread(_eeprom_fd, dst, n, src) == (ssize_t)n);
}
void SITLEEPROMStorage::write_byte(uint16_t loc, uint8_t value)
{
assert(loc < 4096);
_eeprom_open();
assert(pwrite(_eeprom_fd, &value, 1, loc) == 1);
}
void SITLEEPROMStorage::write_word(uint16_t loc, uint16_t value)
{
assert(loc < 4096);
_eeprom_open();
assert(pwrite(_eeprom_fd, &value, 2, loc) == 2);
}
void SITLEEPROMStorage::write_dword(uint16_t loc, uint32_t value)
{
assert(loc < 4096);
_eeprom_open();
assert(pwrite(_eeprom_fd, &value, 4, loc) == 4);
}
void SITLEEPROMStorage::write_block(uint16_t dst, const void *src, size_t n)
{
assert(dst < 4096);
_eeprom_open();
assert(pwrite(_eeprom_fd, src, n, dst) == (ssize_t)n);
}
#endif