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perf(ds18b20-ds2480): передавай байты в Data Mode

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This commit is contained in:
Andrey Kruchinkin
2026-09-15 22:45:07 +03:00
parent 3020de7e0c
commit def3eb08f3
7 changed files with 128 additions and 13 deletions
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30
c/ds18b20-ds2480/ds2480.c
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@@ -8,9 +8,15 @@ static ds2480_status fault(ds2480 *bus, ds2480_status status)
static ds2480_status exchange(ds2480 *bus, uint8_t command, uint8_t *reply)
{
uint8_t mode = 0xE3;
if (!bus || !reply) return DS2480_ARGUMENT;
if (!bus->ready) return DS2480_NOT_READY;
if (bus->power_active && command != 0xF1) return DS2480_BUSY;
if (bus->data_mode) {
if (bus->port.write(bus->port.user, &mode, 1, bus->timeout_ms))
return fault(bus, DS2480_IO);
bus->data_mode = 0;
}
if (bus->port.write(bus->port.user, &command, 1, bus->timeout_ms) ||
bus->port.read(bus->port.user, reply, 1, bus->timeout_ms))
return fault(bus, DS2480_IO);
@@ -31,6 +37,7 @@ ds2480_status ds2480_init(ds2480 *bus, const ds2480_port *port, uint32_t timeout
copy = *port; /* Also permit reinitialization with &bus->port. */
bus->ready = 0;
bus->power_active = 0;
bus->data_mode = 0;
bus->port = copy;
bus->timeout_ms = timeout_ms;
if (copy.prepare(copy.user) ||
@@ -79,15 +86,22 @@ ds2480_status ds2480_bit(ds2480 *bus, uint8_t bit, uint8_t *received)
ds2480_status ds2480_byte(ds2480 *bus, uint8_t value, uint8_t *received)
{
uint8_t i, bit, result = 0;
ds2480_status status;
if (!received) return DS2480_ARGUMENT;
for (i = 0; i < 8; ++i) {
status = ds2480_bit(bus, (uint8_t)((value >> i) & 1), &bit);
if (status != DS2480_OK) return status;
result |= (uint8_t)(bit << i);
uint8_t mode = 0xE1, reply;
if (!bus || !received) return DS2480_ARGUMENT;
if (!bus->ready) return DS2480_NOT_READY;
if (bus->power_active) return DS2480_BUSY;
if (!bus->data_mode) {
if (bus->port.write(bus->port.user, &mode, 1, bus->timeout_ms))
return fault(bus, DS2480_IO);
bus->data_mode = 1;
}
*received = result;
if (bus->port.write(bus->port.user, &value, 1, bus->timeout_ms))
return fault(bus, DS2480_IO);
if (value == 0xE3 && bus->port.write(bus->port.user, &value, 1, bus->timeout_ms))
return fault(bus, DS2480_IO);
if (bus->port.read(bus->port.user, &reply, 1, bus->timeout_ms))
return fault(bus, DS2480_IO);
*received = reply;
return DS2480_OK;
}