forked from mirror/uv-k5-firmware
69 lines
1.6 KiB
C
69 lines
1.6 KiB
C
/* Copyright 2023 Dual Tachyon
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* https://github.com/DualTachyon
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "fm.h"
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#include "settings.h"
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uint16_t gFM_Channels[20];
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bool gFmMute;
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bool FM_CheckValidChannel(uint8_t Channel)
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{
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if (Channel < 20 && gFM_Channels[Channel] - 760 < 321) {
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return true;
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}
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return false;
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}
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uint8_t FM_FindNextChannel(uint8_t Channel, uint8_t Direction)
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{
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uint8_t i;
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for (i = 0; i < 20; i++) {
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if (Channel == 0xFF) {
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Channel = 19;
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} else if (Channel >= 20) {
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Channel = 0;
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}
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if (FM_CheckValidChannel(Channel)) {
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return Channel;
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}
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Channel += Direction;
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}
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return 0xFF;
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}
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int FM_ConfigureChannelState(void)
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{
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uint8_t Channel;
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gEeprom.FM_FrequencyToPlay = gEeprom.FM_CurrentFrequency;
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if (gEeprom.FM_IsChannelSelected) {
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Channel = FM_FindNextChannel(gEeprom.FM_CurrentChannel, FM_CHANNEL_UP);
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if (Channel == 0xFF) {
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gEeprom.FM_IsChannelSelected = false;
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return -1;
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}
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gEeprom.FM_CurrentChannel = Channel;
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gEeprom.FM_FrequencyToPlay = gFM_Channels[Channel];
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}
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return 0;
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}
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