1 // Copyright 2023 The Pigweed Authors
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License"); you may not
4 // use this file except in compliance with the License. You may obtain a copy of
5 // the License at
6 //
7 // https://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
11 // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
12 // License for the specific language governing permissions and limitations under
13 // the License.
14
15 #include "pw_digital_io_rp2040/digital_io.h"
16
17 #include "hardware/gpio.h"
18 #include "pw_digital_io/digital_io.h"
19 #include "pw_status/status.h"
20
21 namespace pw::digital_io {
22
Rp2040DigitalIn(Rp2040Config config)23 Rp2040DigitalIn::Rp2040DigitalIn(Rp2040Config config) : config_(config) {}
24
DoEnable(bool enable)25 Status Rp2040DigitalIn::DoEnable(bool enable) {
26 if (!enable) {
27 gpio_deinit(config_.pin);
28 return OkStatus();
29 }
30
31 gpio_init(config_.pin);
32 gpio_set_dir(config_.pin, GPIO_IN);
33 gpio_set_pulls(config_.pin, config_.enable_pull_up, config_.enable_pull_down);
34 return OkStatus();
35 }
36
DoGetState()37 Result<State> Rp2040DigitalIn::DoGetState() {
38 if (gpio_get_function(config_.pin) != GPIO_FUNC_SIO ||
39 gpio_get_dir(config_.pin) != GPIO_IN) {
40 return Status::FailedPrecondition();
41 }
42
43 const bool pin_value = gpio_get(config_.pin);
44 const State state = config_.PhysicalToLogical(pin_value);
45 return pw::Result<State>(state);
46 }
47
Rp2040DigitalInOut(Rp2040Config config)48 Rp2040DigitalInOut::Rp2040DigitalInOut(Rp2040Config config) : config_(config) {}
49
DoEnable(bool enable)50 Status Rp2040DigitalInOut::DoEnable(bool enable) {
51 if (!enable) {
52 gpio_deinit(config_.pin);
53 return OkStatus();
54 }
55
56 gpio_init(config_.pin);
57 gpio_set_dir(config_.pin, GPIO_OUT);
58 gpio_set_pulls(config_.pin, config_.enable_pull_up, config_.enable_pull_down);
59 return OkStatus();
60 }
61
DoSetState(State level)62 Status Rp2040DigitalInOut::DoSetState(State level) {
63 if (gpio_get_function(config_.pin) != GPIO_FUNC_SIO ||
64 gpio_get_dir(config_.pin) != GPIO_OUT) {
65 return Status::FailedPrecondition();
66 }
67
68 gpio_put(config_.pin, config_.LogicalToPhysical(level));
69 return OkStatus();
70 }
71
DoGetState()72 Result<State> Rp2040DigitalInOut::DoGetState() {
73 if (gpio_get_function(config_.pin) != GPIO_FUNC_SIO ||
74 gpio_get_dir(config_.pin) != GPIO_OUT) {
75 return Status::FailedPrecondition();
76 }
77
78 const bool pin_value = gpio_get(config_.pin);
79 const State state = config_.PhysicalToLogical(pin_value);
80 return pw::Result<State>(state);
81 }
82
83 } // namespace pw::digital_io
84