FlapJackApps/libdivecomputer
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Read the profile ringbuffer backwards.

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This commit is contained in:
Jef Driesen 2009-04-10 09:21:08 +00:00
parent 5ce7aeffd9
commit 85e0b9dcbf
1 changed files with 19 additions and 31 deletions
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50
src/oceanic_atom2.c
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@ -61,6 +61,7 @@
#define RB_PROFILE_BEGIN 0x0A50
#define RB_PROFILE_END 0xFFF0
#define RB_PROFILE_DISTANCE(a,b) ringbuffer_distance (a, b, RB_PROFILE_BEGIN, RB_PROFILE_END)
#define RB_PROFILE_INCR(a,b) ringbuffer_increment (a, b, RB_PROFILE_BEGIN, RB_PROFILE_END)
#define PT_PROFILE_FIRST(x) (((array_uint16_le ((x) + 5) ) & 0x0FFF) * OCEANIC_ATOM2_PACKET_SIZE)
#define PT_PROFILE_LAST(x) (((array_uint16_le ((x) + 6) >> 4) & 0x0FFF) * OCEANIC_ATOM2_PACKET_SIZE)
@ -502,32 +503,6 @@ oceanic_atom2_device_write (device_t *abstract, unsigned int address, const unsi
}
static device_status_t
oceanic_atom2_read_ringbuffer (device_t *abstract, unsigned int address, unsigned char data[], unsigned int size, unsigned int begin, unsigned int end)
{
assert (address >= begin && address < end);
assert (size <= end - begin);
if (address + size > end) {
unsigned int a = end - address;
unsigned int b = size - a;
device_status_t rc = oceanic_atom2_device_read (abstract, address, data, a);
if (rc != DEVICE_STATUS_SUCCESS)
return rc;
rc = oceanic_atom2_device_read (abstract, begin, data + a, b);
if (rc != DEVICE_STATUS_SUCCESS)
return rc;
} else {
device_status_t rc = oceanic_atom2_device_read (abstract, address, data, size);
if (rc != DEVICE_STATUS_SUCCESS)
return rc;
}
return DEVICE_STATUS_SUCCESS;
}
static device_status_t
oceanic_atom2_device_dump (device_t *abstract, unsigned char data[], unsigned int size, unsigned int *result)
{
@ -699,14 +674,27 @@ oceanic_atom2_device_foreach (device_t *abstract, dive_callback_t callback, void
// Get the profile pointers.
unsigned int rb_entry_first = PT_PROFILE_FIRST (logbooks + entry);
unsigned int rb_entry_last = PT_PROFILE_LAST (logbooks + entry);
unsigned int rb_entry_end = RB_PROFILE_INCR (rb_entry_last, OCEANIC_ATOM2_PACKET_SIZE);
unsigned int rb_entry_size = RB_PROFILE_DISTANCE (rb_entry_first, rb_entry_last) + OCEANIC_ATOM2_PACKET_SIZE;
// Read the profile data.
// Memory buffer for the profile data.
unsigned char profile[(RB_PROFILE_END - RB_PROFILE_BEGIN) + OCEANIC_ATOM2_PACKET_SIZE / 2] = {0};
rc = oceanic_atom2_read_ringbuffer (abstract, rb_entry_first, profile + OCEANIC_ATOM2_PACKET_SIZE / 2, rb_entry_size, RB_PROFILE_BEGIN, RB_PROFILE_END);
if (rc != DEVICE_STATUS_SUCCESS) {
WARNING ("Cannot read dive profiles.");
return rc;
// Read the profile data.
page = rb_entry_size + OCEANIC_ATOM2_PACKET_SIZE / 2;
address = rb_entry_end;
npages = rb_entry_size / OCEANIC_ATOM2_PACKET_SIZE;
for (unsigned int i = 0; i < npages; ++i) {
// Move to the start of the current page.
if (address == RB_PROFILE_BEGIN)
address = RB_PROFILE_END;
address -= OCEANIC_ATOM2_PACKET_SIZE;
page -= OCEANIC_ATOM2_PACKET_SIZE;
// Read the profile page.
rc = oceanic_atom2_device_read (abstract, address, profile + page, OCEANIC_ATOM2_PACKET_SIZE);
if (rc != DEVICE_STATUS_SUCCESS)
return rc;
}
// Copy the logbook data to the profile.