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Enable big page support

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The Oceanic Pro Plus 4 appears to support the big page B4 and B8 read
commands, but with some strange twists:

 * When sending the B8 read command, a 256 byte packet is received. The
   checksums of the packet are valid, but the upper half of the payload
   data is always filled with zero bytes. That means we can't use this
   command.

 * The B4 read command appears to use a 2 byte checksum instead of the
   normal 1 byte checksum. That means we can use this command with a
   small model specific tweak.
This commit is contained in:
Jef Driesen 2022-12-29 16:34:53 +01:00
parent 3414f72f60
commit ceae89e149
1 changed files with 3 additions and 2 deletions
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5
src/oceanic_atom2.c
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@ -948,7 +948,8 @@ oceanic_atom2_device_open (dc_device_t **out, dc_context_t *context, dc_iostream
}
// Set the big page support.
if (device->base.layout == &aeris_f11_layout) {
if (device->base.layout == &aeris_f11_layout ||
device->base.layout == &oceanic_proplus3_layout) {
device->bigpage = 8;
} else if (device->base.layout == &oceanic_proplusx_layout ||
device->base.layout == &aqualung_i770r_layout ||
@ -1042,7 +1043,7 @@ oceanic_atom2_device_read (dc_device_t *abstract, unsigned int address, unsigned
break;
case 8:
read_cmd = CMD_READ8;
crc_size = 1;
crc_size = device->base.model == PROPLUS4 ? 2 : 1;
break;
case 16:
read_cmd = CMD_READ16;