mayhem-firmware/firmware/application/apps/ui_mictx.cpp

/*
 * Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
 * Copyright (C) 2016 Furrtek
 *
 * This file is part of PortaPack.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street,
 * Boston, MA 02110-1301, USA.
 */

#include "ui_mictx.hpp"

#include "baseband_api.hpp"
#include "audio.hpp"

#include "wm8731.hpp"
using wolfson::wm8731::WM8731;

#include "tonesets.hpp"
#include "portapack_hal.hpp"
#include "cpld_update.hpp"
#include "string_format.hpp"
#include "irq_controls.hpp"

#include <cstring>

using namespace tonekey;
using namespace portapack;


WM8731 audio_codec_wm8731 { i2c0, 0x1a };


namespace ui {

void MicTXView::focus() {
	switch(focused_ui) {
		case 0:
			field_frequency.focus();
			break;
		case 1:
			field_rxfrequency.focus();
			break;
		default:
			field_va.focus();
			break;
	}	
}

void MicTXView::update_vumeter() {
	vumeter.set_value(audio_level);
}

void MicTXView::on_tx_progress(const bool done) {
	// Roger beep played, stop transmitting
	if (done)
		set_tx(false);
}

void MicTXView::configure_baseband() {
	baseband::set_audiotx_config(
		sampling_rate / 20,		// Update vu-meter at 20Hz
		transmitting ? transmitter_model.channel_bandwidth() : 0,
		mic_gain,
		shift_bits_s16,			// to be used in dsp_modulate
		TONES_F2D(tone_key_frequency(tone_key_index), sampling_rate),
		enable_am,
		enable_dsb,
		enable_usb,
		enable_lsb
	);

}

void MicTXView::set_tx(bool enable) {
	if (enable) {
		if (rx_enabled)  //If audio RX is enabled
			rxaudio(false); //Then turn off audio RX
		transmitting = true;
		configure_baseband();
		transmitter_model.set_tuning_frequency(tx_frequency);
		transmitter_model.set_tx_gain(tx_gain);
		transmitter_model.set_rf_amp(rf_amp);
		transmitter_model.enable();
		portapack::pin_i2s0_rx_sda.mode(3);		// This is already done in audio::init but gets changed by the CPLD overlay reprogramming
	} else {
		if (transmitting && rogerbeep_enabled) {
			baseband::request_beep();	//Transmit the roger beep
			transmitting = false;		//And flag the end of the transmission so ...
		} else { // (if roger beep was enabled, this will be executed after the beep ends transmitting.
			transmitting = false;
			configure_baseband();
			transmitter_model.disable();
			if (rx_enabled)  //If audio RX is enabled and we've been transmitting
				rxaudio(true); //Turn back on audio RX
		}
	}
}

void MicTXView::do_timing() {
	if (va_enabled) {
		if (!transmitting) {
			// Attack
			if (audio_level >= va_level) {
				if ((attack_timer >> 8) >= attack_ms) {
					decay_timer = 0;
					attack_timer = 0;
					set_tx(true);
				} else {
					attack_timer += lcd_frame_duration;
				}
			} else {
				attack_timer = 0;
			}
		} else {
			// Decay
			if (audio_level < va_level) {
				if ((decay_timer >> 8) >= decay_ms) {
					decay_timer = 0;
					attack_timer = 0;
					set_tx(false);
				} else {
					decay_timer += lcd_frame_duration;
				}
			} else {
				decay_timer = 0;
			}
		}
	} else {
		// Check for PTT release
		const auto switches_state = get_switches_state();
		if (!switches_state[4] && transmitting && !button_touch)		// Select button
			set_tx(false);
	}
}

/* Hmmmm. Maybe useless now.
void MicTXView::on_tuning_frequency_changed(rf::Frequency f) {
	transmitter_model.set_tuning_frequency(f);
	//if ( rx_enabled )
		receiver_model.set_tuning_frequency(f); //Update freq also for RX
}
*/

void MicTXView::rxaudio(bool is_on) {
	if (is_on) {
		audio::input::stop();
		baseband::shutdown();
		
		if (enable_am || enable_usb || enable_lsb || enable_dsb) {		// "NFM/FM",0 ," WFM  ",1 ,  "  AM  ",2, " USB  ", 3, " LSB  ",4, " DSB-SC", 5
			baseband::run_image(portapack::spi_flash::image_tag_am_audio);
			receiver_model.set_modulation(ReceiverModel::Mode::AMAudio);	// that AM demodulation engine is common to all Amplitude mod : AM/USB/LSB/DSB (2,3,4,5)	
			if (options_mode.selected_index() < 5)       // We will be called here with 2,3,4,5 . We treat here demod. filter 2,3,4; (excluding DSB-C case (5) it is treated more down).  
				receiver_model.set_am_configuration(options_mode.selected_index() - 2);  // selecting proper filter(2,3,4). 2-2=0=>6k-AM(0) , 3-2=1=>+3k-USB(1), 4-2=2=>-3K-LSB(2),
		}
		else {    // We are in NFM/FM or WFM    (NFM BW:8k5 or 11k / FM BW 16k  / WFM  BW:200k) 
			
			if (enable_wfm) {     // WFM , BW 200Khz aprox ,
				baseband::run_image(portapack::spi_flash::image_tag_wfm_audio);
				receiver_model.set_modulation(ReceiverModel::Mode::WidebandFMAudio);
				receiver_model.set_wfm_configuration(0);  // there are only  1  x config filters 200k WFM . (not like 8k5/11k/16k)
			} else {     // NFM BW:8k5 or  11k / FM BW 16k 
				baseband::run_image(portapack::spi_flash::image_tag_nfm_audio);
				receiver_model.set_modulation(ReceiverModel::Mode::NarrowbandFMAudio); // 	
				// receiver_model.set_nbfm_configuration(n); is called above  , depending 8k5, 11k, 16k  
			}
		} 
		receiver_model.set_sampling_rate(3072000);
		receiver_model.set_baseband_bandwidth(1750000);	
//		receiver_model.set_tuning_frequency(field_frequency.value()); //probably this too can be commented out.
		receiver_model.set_tuning_frequency(rx_frequency); // Now with seperate controls!
		receiver_model.set_lna(rx_lna);
		receiver_model.set_vga(rx_vga);
		receiver_model.set_rf_amp(rx_amp);
		receiver_model.enable();
		hackrf::cpld::load_sram_no_verify();  // to have a good RX without any ghost inside Mic App
		audio::output::start();
	} else {	//These incredibly convoluted steps are required for the vumeter to reappear when stopping RX.
		receiver_model.set_modulation(ReceiverModel::Mode::NarrowbandFMAudio); //This fixes something with AM RX...
		receiver_model.disable();
		baseband::shutdown();

		baseband::run_image(portapack::spi_flash::image_tag_mic_tx);
		audio::output::stop();
		audio::input::start(ak4951_alc_and_wm8731_boost_GUI);	// When detected AK4951 => set up ALC mode; when detected WM8731 => set up mic_boost ON/OFF.
		portapack::pin_i2s0_rx_sda.mode(3);
		configure_baseband();
	}
}

void MicTXView::on_headphone_volume_changed(int32_t v) {
	//if (rx_enabled) {
		const auto new_volume = volume_t::decibel(v - 99) + audio::headphone::volume_range().max;
		receiver_model.set_headphone_volume(new_volume);
	//}
}

void MicTXView::set_ptt_visibility(bool v) {
	tx_button.hidden(!v);
}

MicTXView::MicTXView(
	NavigationView& nav
)
{
	portapack::pin_i2s0_rx_sda.mode(3);		// This is already done in audio::init but gets changed by the CPLD overlay reprogramming
	
	baseband::run_image(portapack::spi_flash::image_tag_mic_tx);
	
	if (audio::debug::codec_name() =="WM8731" ) {
	add_children({		
		&labels_WM8731,		// we have audio codec WM8731, same MIC menu  as original.
		&vumeter,
		&options_gain,		// MIC GAIN float factor on the GUI.
		&options_wm8731_boost_mode,
//		&check_va,
		&field_va,
		&field_va_level,
		&field_va_attack,
		&field_va_decay,
		&field_bw,
		&field_rfgain,
		&field_rfamp,
		&options_mode,
		&field_frequency,
		&options_tone_key,
		&check_rogerbeep,
		&check_rxactive,
		&field_volume,
		&field_rxbw,
		&field_squelch,
		&field_rxfrequency,
		&field_rxlna,
		&field_rxvga,
		&field_rxamp,
		&tx_button
	});
    
	} else {			
	add_children({
		&labels_AK4951,		// we have audio codec AK4951, enable Automatic Level Control
		&vumeter,
		&options_gain,
		&options_ak4951_alc_mode,
//		&check_va,
		&field_va,
		&field_va_level,
		&field_va_attack,
		&field_va_decay,
		&field_bw,
		&field_rfgain,
		&field_rfamp,
		&options_mode,
		&field_frequency,
		&options_tone_key,
		&check_rogerbeep,
		&check_rxactive,
		&field_volume,
		&field_rxbw,
		&field_squelch,
		&field_rxfrequency,
		&field_rxlna,
		&field_rxvga,
		&field_rxamp,
		&tx_button
	});
	
	}

	tone_keys_populate(options_tone_key);
	options_tone_key.on_change = [this](size_t i, int32_t) {
		tone_key_index = i;
	};
	options_tone_key.set_selected_index(0);
	
	options_gain.on_change = [this](size_t, int32_t v) {
		mic_gain = v / 10.0;
		configure_baseband();
	};
	options_gain.set_selected_index(1);		// x1.0  preselected default.

 	if (audio::debug::codec_name() =="WM8731") {
		options_wm8731_boost_mode.on_change = [this](size_t, int8_t v) {

			switch(v) {
			case 0: 	                // +12 dB’s respect reference level orig fw 1.5.x fw FM : when +20dB's boost ON) and shift bits (>>8), 
				shift_bits_s16 = 6; 	//  now mic-boost on (+20dBs) and shift bits (>>6), +20+12=32 dB’s (orig fw +20 dBs+ 0dBs)=> +12dB's respect ref.
				break;					
			case 1: 	                // +06 dB’s reference level , (when +20dB's boost ON) 
				shift_bits_s16 = 7; 	// now mic-boost on (+20dBs) and shift bits (>>7), +20+06=26 dB’s (orig fw +20 dBs+ 0dBs) => +06dB's respect ref.	 
				break;					
			case 2: 	                
				shift_bits_s16 = 4; 	// +04 dB’s respect ref level , (when +20dB's boost OFF) 
				break;					// now mic-boost off (+00dBs) shift bits (4) (+0+24dB's)=24 dBs => +04dB's respect ref.	 
			case 3:
				shift_bits_s16 = 5;		// -02 dB’s respect ref level , (when +20dB's boost OFF) 
				break;					// now mic-boost off (+00dBs) shift bits (5) (+0+18dB's)=18 dBs => -02dB's respect ref.	 
			case 4:
				shift_bits_s16 = 6;     // -08 dB’s respect ref level , (when +20dB's boost OFF) 
				break;					// now mic-boost off (+00dBs) shift bits (6) (+0+12dB's)=12 dBs => -08dB's respect ref.	
			}
			ak4951_alc_and_wm8731_boost_GUI   = v;	//  0,..4 WM8731_boost dB's options, (combination boost on/off , and effective gain in captured data >>x) 
			audio::input::start(ak4951_alc_and_wm8731_boost_GUI);  // Detected (WM8731) , set up the proper wm_boost on/off , 0..4 (0,1) boost_on , (2,3,4) boost_0ff
			configure_baseband(); 					// to update in real timme,sending msg ,  var-parameters >>shift_bits FM msg ,to audio_tx from M0 to M4 Proc -
		};
		options_wm8731_boost_mode.set_selected_index(3);	// preset GUI index 3 as default WM -> -02 dB's .	
	} else {
	   	shift_bits_s16 = 8;         	// Initialized default fixed >>8_FM for FM tx mod ,  shift audio data for AK4951  ,using top 8 bits s16 data (>>8)
	  	options_ak4951_alc_mode.on_change = [this](size_t, int8_t v) {
	    	ak4951_alc_and_wm8731_boost_GUI   = v;   				// 0,..11,  AK4951 Mic -Automatic volume Level Control  options, 
			audio::input::start(ak4951_alc_and_wm8731_boost_GUI);  	// Detected (AK4951) ==> Set up proper ALC mode from 0..11 options
			configure_baseband(); 									// sending fixed >>8_FM , var-parameters msg ,  to audiotx from this M0 to M4 process.
		};
	}
	
   	// options_ak4951_alc_mode.set_selected_index(0);
	 
	tx_frequency = transmitter_model.tuning_frequency();
	field_frequency.set_value(transmitter_model.tuning_frequency());
	field_frequency.set_step(receiver_model.frequency_step());
	field_frequency.on_change = [this](rf::Frequency f) {
		tx_frequency = f;
		if(!rx_enabled)
			transmitter_model.set_tuning_frequency(f);
	};
	field_frequency.on_edit = [this, &nav]() {
		focused_ui = 0;
		// TODO: Provide separate modal method/scheme?
		auto new_view = nav.push<FrequencyKeypadView>(tx_frequency);
		new_view->on_changed = [this](rf::Frequency f) {
			tx_frequency = f;
			if(!rx_enabled)
				transmitter_model.set_tuning_frequency(f);
			this->field_frequency.set_value(f);
			set_dirty();
		};
	};
	
	field_bw.on_change = [this](uint32_t v) {
		transmitter_model.set_channel_bandwidth(v * 1000);
	};
	field_bw.set_value(10);	// pre-default first time, TX  deviation FM for NFM / FM
	
	
	tx_gain = transmitter_model.tx_gain();
	field_rfgain.on_change = [this](int32_t v) {
		tx_gain = v;
		
	};
	field_rfgain.set_value(tx_gain);

	rf_amp = transmitter_model.rf_amp();
	field_rfamp.on_change = [this](int32_t v) {
		rf_amp = (bool)v;
	};
	field_rfamp.set_value(rf_amp ? 14 : 0);
	
	options_mode.on_change = [this](size_t, int32_t v) {   //{ "NFM/FM", 0 }, { " WFM  ", 1 },{ "AM", 2 },{ "USB", 3 },{ "LSB", 4 },{ "DSB", 5 }
		enable_am  = false;
		enable_usb = false;
		enable_lsb = false;
		enable_dsb = false;
		enable_wfm = false;

		using option_t = std::pair<std::string, int32_t>;
		using options_t = std::vector<option_t>;
		options_t rxbw;				// Aux structure to change dynamically  field_rxbw contents,  
		
		switch(v) {
			case 0:					 //{ "FM", 0 }
				enable_am  = false;
				enable_usb = false;
				enable_lsb = false;
				enable_dsb = false;
				field_bw.set_value(10);	// pre-default deviation FM for WFM
				// field_bw.set_value(transmitter_model.channel_bandwidth() / 1000);
				//if (rx_enabled)
				rxaudio(rx_enabled); 					//Update now if we have RX audio on
				options_tone_key.hidden(0);				// we are in FM mode , we should have active the Key-tones & CTCSS option.
				
				rxbw.emplace_back(" NFM1:8k5  ", 0); 		// restore the original dynamic field_rxbw value.
				rxbw.emplace_back(" NFM2:11k  ", 1);
				rxbw.emplace_back(" FM  :16k  ", 2);			
				field_rxbw.set_options(rxbw);			// store that aux GUI option to the field_rxbw.
							
				field_rxbw.hidden(0);					// we are in FM mode,  we need to allow the user set up of the RX NFM BW selection (8K5, 11K, 16K) 
				field_bw.hidden(0);						// we are in FM mode, we need to allow FM deviation parameter , in non FM mode.
				break;
			case 1:					 //{ "WFM", 1 }
				enable_am  = false;
				enable_usb = false;
				enable_lsb = false;
				enable_dsb = false;
				enable_wfm = true;
				field_bw.set_value(75);	// pre-default deviation FM for WFM
				// field_bw.set_value(transmitter_model.channel_bandwidth() / 1000);
				//if (rx_enabled)
				rxaudio(rx_enabled); 					//Update now if we have RX audio on
				options_tone_key.hidden(0);				// we are in WFM mode , we should have active the Key-tones & CTCSS option.

				rxbw.emplace_back("  200k-WFM ", 0);		// locked a fixed option , to display it .
				field_rxbw.set_options(rxbw);			// store that aux GUI option to the field_rxbw.

				field_rxbw.hidden(0);					// we are in WFM mode,  we need to show to the user the selected BW WFM filer . 
				field_bw.hidden(0);						// we are in WFM mode, we need to allow WFM deviation parameter , in non FM mode.
				break;
			case 2:					 //{ "AM", 2 }
				enable_am = true;
				rxaudio(rx_enabled); 					//Update now if we have RX audio on
				options_tone_key.set_selected_index(0);	// we are NOT in FM mode ,  we reset the possible previous key-tones &CTCSS selection.
				set_dirty();							// Refresh display	
				options_tone_key.hidden(1);				// we hide that Key-tones & CTCSS input selecction, (no meaning in AM/DSB/SSB).
				
				rxbw.emplace_back("  6k-AM    ", 0);		// locked a fixed option , to display it .
				field_rxbw.set_options(rxbw);			// store that aux GUI option to the field_rxbw.
	
				field_rxbw.hidden(0);					// we show fixed RX  AM BW 6Khz 
				field_bw.hidden(1);						// we hide the FM TX deviation parameter , in non FM mode.
				check_rogerbeep.hidden(0);				// make visible again the "rogerbeep" selection.					
				break;
			case 3:					 //{ "USB", 3 }
				enable_usb = true;
				rxaudio(rx_enabled); 					//Update now if we have RX audio on
				check_rogerbeep.set_value(false);		// reset the possible activation of roger beep, because it is not compatible with SSB , by now. 
				check_rogerbeep.hidden(1);				// hide that roger beep selection. 

				rxbw.emplace_back("  3k-USB   ", 0);		// locked a fixed option , to display it .
				field_rxbw.set_options(rxbw);			// store that aux GUI option to the field_rxbw.

				set_dirty();							// Refresh display
				break;
			case 4:					 //{ "LSB", 4 }
				enable_lsb = true;
				rxaudio(rx_enabled); 					//Update now if we have RX audio on
				check_rogerbeep.set_value(false);		// reset the possible activation of roger beep, because it is not compatible with SSB , by now. 
				check_rogerbeep.hidden(1);				// hide that roger beep selection. 
				
				rxbw.emplace_back("  3k-LSB   ", 0);		// locked a fixed option , to display it .
				field_rxbw.set_options(rxbw);			// store that aux GUI option to the field_rxbw.
				
				set_dirty();							// Refresh display
				break;
			case 5:				 	//{ "DSB-SC", 5 }
				enable_dsb = true;
				rxaudio(rx_enabled); 					//Update now if we have RX audio on
				check_rogerbeep.hidden(0);				// make visible again the "rogerbeep" selection.
			
				rxbw.emplace_back("SSB1:3k-USB", 0); 		// added dynamically two options (index 0,1) to that DSB-C case to the  field_rxbw value.
				rxbw.emplace_back("SSB2:3k-LSB", 1);
		
				field_rxbw.set_options(rxbw);			// store that aux GUI option to the field_rxbw.

				break;
		}
		//configure_baseband();
	};
	
	
	/*
	check_va.on_select = [this](Checkbox&, bool v) {
		va_enabled = v;
		text_ptt.hidden(v);			//hide / show PTT text
		check_rxactive.hidden(v); 	//hide / show the RX AUDIO
		set_dirty();				//Refresh display
	};
	*/
	field_va.set_selected_index(1);
	field_va.on_change = [this](size_t, int32_t v) {
		switch(v) {
			case 0:
				va_enabled = 0;
				this->set_ptt_visibility(0);
				check_rxactive.hidden(0);
				ptt_enabled = 0;
				break;
			case 1:
				va_enabled = 0;
				this->set_ptt_visibility(1);
				check_rxactive.hidden(0);
				ptt_enabled = 1;
				break;
			case 2:
				if (!rx_enabled) {
					va_enabled = 1;
					this->set_ptt_visibility(0);
					check_rxactive.hidden(1);
					ptt_enabled = 0;
				} else {
					field_va.set_selected_index(1);
				}
				break;
		}
		set_dirty();
	};
	

	check_rogerbeep.on_select = [this](Checkbox&, bool v) {
		rogerbeep_enabled = v;
	};

	field_va_level.on_change = [this](int32_t v) {
		va_level = v;
		vumeter.set_mark(v);
	};
	field_va_level.set_value(40);
	
	field_va_attack.on_change = [this](int32_t v) {
		attack_ms = v;
	};
	field_va_attack.set_value(500);
	
	field_va_decay.on_change = [this](int32_t v) {
		decay_ms = v;
	};
	field_va_decay.set_value(1000);

	check_rxactive.on_select = [this](Checkbox&, bool v) {
//		vumeter.set_value(0);	//Start with a clean vumeter
		rx_enabled = v;
//		check_va.hidden(v); 	//Hide or show voice activation
		rxaudio(v);				//Activate-Deactivate audio rx accordingly
		set_dirty();			//Refresh interface
	};

	field_volume.set_value((receiver_model.headphone_volume() - audio::headphone::volume_range().max).decibel() + 99);
	field_volume.on_change = [this](int32_t v) { this->on_headphone_volume_changed(v);	};

	field_rxbw.on_change = [this](size_t, int32_t v) {
		if (!(enable_am || enable_usb || enable_lsb || enable_dsb || enable_wfm )) { 
				// In Previous fw versions, that nbfm_configuration(n)  was done in any mode (FM/AM/SSB/DSB)...strictly speaking only need it in (NFM/FM) 
				receiver_model.set_nbfm_configuration(v ); // we are in  NFM/FM case, we need to  select proper NFM/FM RX channel filter , NFM BW 8K5(0), NFM BW 11K(1) , FM BW 16K (2)
		}
		else {					// we are not in  NFM/FM mode  .(we could be in any of the rest : AM /USB/LSB/DSB-C)
			if (enable_dsb) { 	// we are in DSB-SC in TX mode , we will allow both independent RX SSB demodulation (USB / LSB side band)
				receiver_model.set_am_configuration(v +1 );  // we are in DSB-C TX mode , we need to  select proper SSB filter. 0+1 =>usb(1), 1+1=2 =>lsb(2),
			} 
		}		 
	};

	field_squelch.on_change = [this](int32_t v) { 
		receiver_model.set_squelch_level(100 - v);	
	};
	field_squelch.set_value(0);
	receiver_model.set_squelch_level(0);

	rx_frequency = receiver_model.tuning_frequency();
	field_rxfrequency.set_value(rx_frequency);
	field_rxfrequency.set_step(receiver_model.frequency_step());
	field_rxfrequency.on_change = [this](rf::Frequency f) {
		rx_frequency = f;
		if(rx_enabled)
			receiver_model.set_tuning_frequency(f);
	};
	field_rxfrequency.on_edit = [this, &nav]() {
		focused_ui = 1;
		// TODO: Provide separate modal method/scheme?
		auto new_view = nav.push<FrequencyKeypadView>(rx_frequency);
		new_view->on_changed = [this](rf::Frequency f) {
			rx_frequency = f;
			if(rx_enabled)
				receiver_model.set_tuning_frequency(f);
			this->field_rxfrequency.set_value(f);
			set_dirty();
		};
	};

	
	rx_lna = receiver_model.lna();
	field_rxlna.on_change = [this](int32_t v) {
		rx_lna = v;
		if(rx_enabled)
			receiver_model.set_lna(v);
	};
	field_rxlna.set_value(rx_lna);

	rx_vga = receiver_model.vga();
	field_rxvga.on_change = [this](int32_t v) {
		rx_vga = v;
		if(rx_enabled)
			receiver_model.set_vga(v);
	};
	field_rxvga.set_value(rx_vga);

	rx_amp = receiver_model.rf_amp();
	field_rxamp.on_change = [this](int32_t v) {
		rx_amp = v;
		if(rx_enabled)
			receiver_model.set_rf_amp(rx_amp);
	};
	field_rxamp.set_value(rx_amp);

	tx_button.on_select = [this](Button&) {
		if(ptt_enabled && !transmitting) {
			set_tx(true);
		}
	};

	tx_button.on_touch_release = [this](Button&) {
		if(button_touch) {
			button_touch = false;
			set_tx(false);
		}
	};

	tx_button.on_touch_press = [this](Button&) {
		if(!transmitting) {
			button_touch = true;
		}	
	};

	transmitter_model.set_sampling_rate(sampling_rate);
	transmitter_model.set_baseband_bandwidth(1750000);
	
	set_tx(false);

  	audio::set_rate(audio::Rate::Hz_24000);
	audio::input::start(ak4951_alc_and_wm8731_boost_GUI);	// When detected AK4951 => set up ALC mode; when detected WM8731 => set up mic_boost ON/OFF.	
}

MicTXView::~MicTXView() {
	audio::input::stop();
	transmitter_model.set_tuning_frequency(tx_frequency); // Save Tx frequency instead of Rx. Or maybe we need some "System Wide" changes to seperate Tx and Rx frequency.
	transmitter_model.disable();
	if (rx_enabled) //Also turn off audio rx if enabled
		rxaudio(false);
	hackrf::cpld::load_sram_no_verify();  //  to leave all RX ok, without ghost signal problem at the exit .
	baseband::shutdown(); // better this function at the end, not load_sram() that sometimes produces hang up.
}

}