Add FM Radio (by coolshrimp)

fm_radio/LICENSE

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+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
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+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    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 3 of the License, 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.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

fm_radio/README.md

@@ -0,0 +1,48 @@
+# FM Radio - Flipper Zero
+Application for flipperzero device to control radio boards.
+
+## Supported boards
+* [TEA5767](https://www.sparkfun.com/datasheets/Wireless/General/TEA5767.pdf)
+
+## PIN
+ - VCC = 3V3, Pin 9
+ - GND = GND, Pin 18
+ - SCL = C0, Pin 16
+ - SDA = C1, Pin 15
+
+## Controls
+Up = Preset Up<br>
+Down = Preset Down<br>
+Left = Seek Down<br>
+Right = Seek Up<br>
+OK = Toggle Mute
+
+## References
+TEA5767 Datasheet - (https://www.sparkfun.com/datasheets/Wireless/General/TEA5767.pdf)
+
+
+## Changelog
+v1.1<br>
+-Add the Preset Up/Down Icons.<br>
+<br>
+v1.0<br>
+-Reformated Code<br>
+-Added Station Names<br>
+<br>
+v0.8<br>
+-Created TEA5767 Library<br>
+-Created Funtioning app<br>
+<br>
+Initial<br>
+-Created TEA5767 Library<br>
+-Started Making APP<br>
+
+## TO-DO
+Add User Settings Menu: <br>
+-Standby/Mute On Exit: True/False<br>
+-RSSI Seek Strenght: 1-15<br>
+-Sound: Mono-L/Mono-R/Stereo<br>
+-User Editable Station List<br>
+-Redirect TEA5767 Audio To a GPIO and Playback on Flipper Internal Speaker<br>
+<br><br>
+## Created By: Coolshrimp - https://CoolshrimpModz.com

fm_radio/TEA5767/TEA5767.c

@@ -0,0 +1,296 @@
+/**
+ * @file TEA5767.c
+ * @author Coolshrimp - CoolshrimpModz.com
+ * @brief Library for controlling the TEA5767 FM radio chip.
+ * @version 0.1
+ * @date 2023-09-29
+ * 
+ * @copyright GPLv3
+ */
+#include <furi.h>
+#include <furi_hal.h>
+#include <furi_hal_gpio.h>
+#include <furi_hal_resources.h>
+#include <stdio.h> // Include necessary libraries
+
+#include "TEA5767.h"
+
+#define TIMEOUT_MS 100
+// Define a structure to store station information
+
+struct StationInfo {
+    float frequency; // Frequency in MHz
+    int signalLevel; // Signal level
+};
+
+// Helper function to acquire I2C
+static bool acquire_i2c() {
+    // Acquire I2C and check for device readiness
+    furi_hal_i2c_acquire(&furi_hal_i2c_handle_external);
+    return furi_hal_i2c_is_device_ready(&furi_hal_i2c_handle_external, TEA5767_ADR, 5);
+}
+
+static void release_i2c() {
+    // Release I2C
+    furi_hal_i2c_release(&furi_hal_i2c_handle_external);
+}
+
+bool tea5767_is_device_ready() {
+    bool result = acquire_i2c();
+    release_i2c();
+    return result;
+}
+
+bool tea5767_read_registers(uint8_t* buffer) {
+    if(buffer == NULL) return false;
+    bool result = acquire_i2c();
+    if(result) {
+        result =
+            furi_hal_i2c_rx(&furi_hal_i2c_handle_external, TEA5767_ADR, buffer, 5, TIMEOUT_MS);
+    }
+    release_i2c();
+    return result;
+}
+
+bool tea5767_write_registers(uint8_t* buffer) {
+    bool result = false;
+    if(buffer == NULL) return false; // Added NULL check
+    furi_hal_i2c_acquire(&furi_hal_i2c_handle_external);
+    result = furi_hal_i2c_tx(&furi_hal_i2c_handle_external, TEA5767_ADR, buffer, 5, TIMEOUT_MS);
+    furi_hal_i2c_release(&furi_hal_i2c_handle_external);
+    return result;
+}
+
+bool tea5767_init(uint8_t* buffer) {
+    bool result = false;
+
+    buffer[0] = 0x00;
+    buffer[1] = 0x00;
+    buffer[2] = 0xB0;
+    buffer[3] = REG_4_XTAL | REG_4_SMUTE;
+    buffer[4] = 0x00;
+
+    result = tea5767_write_registers(buffer);
+    return result;
+}
+
+bool tea5767_set_mute(uint8_t* buffer, bool mute) {
+    bool result = false;
+
+    if(mute) {
+        buffer[REG_1] |= REG_1_MUTE;
+    } else {
+        buffer[REG_1] &= ~REG_1_MUTE;
+    }
+
+    result = tea5767_write_registers(buffer);
+    return result;
+}
+
+bool tea5767_set_stereo(uint8_t* buffer, bool stereo) {
+    bool result = false;
+
+    if(stereo) {
+        buffer[REG_3] &= ~REG_3_MS;
+    } else {
+        buffer[REG_3] |= REG_3_MS;
+    }
+
+    result = tea5767_write_registers(buffer);
+    return result;
+}
+
+bool tea5767_seek(uint8_t* buffer, bool seek_up) {
+    bool result = false;
+    if(buffer == NULL) {
+        return false;
+    }
+
+    buffer[REG_1] |= REG_1_SM; // Set the Search Mode (SM) bit to initiate seek
+    if(seek_up) {
+        buffer[REG_3] |= REG_3_SUD;
+    } // Set Search Up (SUD) bit
+    else {
+        buffer[REG_3] &= ~REG_3_SUD;
+    } // Set Search Down (SUD) bit
+    buffer[REG_3] |=
+        (REG_3_SSL |
+         0x60); // Set the Search Stop Level (SSL) to high for better tuning accuracy,  set bit 7 for RSSI 7
+    buffer[REG_3] &= ~REG_3_MS; // Set stereo mode (clearing the Mono bit)
+    //buffer[REG_3] |= REG_4_SNC; // Set the Stereo Noise Cancelling (SNC) bit to 1 to reduce noise in stereo reception
+    buffer[REG_4] &= ~REG_4_STBY; // Clear the Standby bit in register 4 to exit standby mode
+    buffer[REG_4] &= ~REG_4_BL; // Limit FM band 87.5 - 108 MHz.
+    buffer[REG_5] |=
+        REG_5_PLLREF; // Set the PLLREF bit to 1 to enable the 6.5 MHz reference frequency for the PLL
+    buffer[REG_5] |= REG_5_DTC; // Set the De-emphasis Time Constant (DTC) bit to 1 for 75 µs
+
+    // Write the updated register values to the TEA5767
+    result = tea5767_write_registers(buffer);
+    return result;
+}
+
+bool tea5767_get_frequency(uint8_t* buffer, int* value) {
+    bool result = false;
+    uint16_t frequency;
+    if(buffer == NULL || value == NULL) return false; //NULL check
+    if(tea5767_read_registers(buffer)) {
+        frequency = ((buffer[REG_1] & REG_1_PLL) << 8) | buffer[1];
+        *value = (frequency * QUARTZ / 4 - FILTER) / 10000;
+        result = true;
+    }
+    return result;
+}
+
+bool tea5767_set_frequency(uint8_t* buffer, int value) {
+    bool result = false;
+    if(buffer == NULL) {
+        return false;
+    }
+    uint16_t frequency = 4 * (value * 10000 + FILTER) / QUARTZ;
+
+    buffer[REG_1] =
+        ((buffer[0] & ~REG_1_PLL) |
+         ((frequency >> 8) & REG_1_PLL)); // Set the upper 8 bits of the PLL word
+    buffer[REG_2] = frequency & REG_2_PLL; // Set the lower 8 bits of the PLL word
+    buffer[REG_1] &= ~REG_1_MUTE; // Clear the Mute bit in register 1
+    buffer[REG_3] &= ~REG_3_MS; // Set stereo mode (clearing the Mono bit)
+    //buffer[REG_3] |= REG_4_SNC; // Set the Stereo Noise Cancelling (SNC) bit to 1 to reduce noise in stereo reception
+    buffer[REG_4] &= ~REG_4_STBY; // Clear the Standby bit in register 4 to exit standby mode
+    buffer[REG_4] &= ~REG_4_BL; // Limit FM band 87.5 - 108 MHz.
+    buffer[REG_5] |=
+        REG_5_PLLREF; // Set the PLLREF bit to 1 to enable the 6.5 MHz reference frequency for the PLL
+    buffer[REG_5] |= REG_5_DTC; // Set the De-emphasis Time Constant (DTC) bit to 1 for 75 µs
+
+    result = tea5767_write_registers(buffer);
+    return result;
+}
+
+bool tea5767_get_radio_info(uint8_t* buffer, struct RADIO_INFO* info) {
+    bool result = false;
+    int frequency_khz;
+
+    // Error handling: Check if buffer and info are not NULL
+    if(buffer && info && tea5767_read_registers(buffer)) {
+        if(buffer[REG_3] & REG_3_MS) {
+            info->stereo = true;
+        } else {
+            info->stereo = false;
+        }
+
+        info->signalLevel = buffer[REG_4] >> 4;
+
+        // Determine signal quality based on signal level
+        if(info->signalLevel >= 0 && info->signalLevel <= 3) {
+            strncpy(info->signalQuality, "Poor", sizeof(info->signalQuality));
+        } else if(info->signalLevel >= 4 && info->signalLevel <= 7) {
+            strncpy(info->signalQuality, "Fair", sizeof(info->signalQuality));
+        } else if(info->signalLevel >= 8 && info->signalLevel <= 11) {
+            strncpy(info->signalQuality, "Good", sizeof(info->signalQuality));
+        } else if(info->signalLevel >= 12 && info->signalLevel <= 15) {
+            strncpy(info->signalQuality, "Excellent", sizeof(info->signalQuality));
+        } else {
+            strncpy(info->signalQuality, "Unknown", sizeof(info->signalQuality));
+        }
+
+        // Now get the frequency
+        if(tea5767_get_frequency(buffer, &frequency_khz)) {
+            info->frequency = frequency_khz / 100.0f; // Convert kHz to MHz
+            result = true; // Only return true if both read_registers and get_frequency succeeded
+        }
+
+        // Check if the radio is muted
+        if(buffer[REG_1] & REG_1_MUTE) {
+            info->muted = true;
+        } else {
+            info->muted = false;
+        }
+    }
+    return result;
+}
+
+void tea5767_seekUp() {
+    //Get CUrrent Station
+    double fm_frequency = tea5767_GetFreq();
+    int targetFrequencyKHz = fm_frequency * 100;
+
+    uint8_t buffer[5];
+    if(tea5767_init(buffer)) {
+        tea5767_set_frequency(buffer, targetFrequencyKHz);
+        // Start seeking upwards
+        tea5767_seek(buffer, true);
+    }
+}
+
+void tea5767_seekDown() {
+    //Get CUrrent Station
+    double fm_frequency = tea5767_GetFreq();
+    int targetFrequencyKHz = fm_frequency * 100;
+
+    uint8_t buffer[5];
+    if(tea5767_init(buffer)) {
+        tea5767_set_frequency(buffer, targetFrequencyKHz);
+        // Start seeking upwards
+        tea5767_seek(buffer, false);
+    }
+}
+
+void tea5767_ToggleMute() {
+    uint8_t buffer[5];
+    if(tea5767_read_registers(buffer)) {
+        if((buffer[REG_1] & REG_1_MUTE) == 0) {
+            tea5767_set_mute(buffer, true);
+        } else {
+            tea5767_set_mute(buffer, false);
+        }
+    }
+}
+
+void tea5767_MuteOn() {
+    uint8_t buffer[5];
+    if(tea5767_read_registers(buffer)) { // Read the current state into the buffer
+        tea5767_set_mute(buffer, true); // Set the mute bit
+    }
+}
+
+void tea5767_MuteOff() {
+    uint16_t frequency;
+    float value; // Changed to a float variable, not a pointer
+    uint8_t buffer[5];
+    if(tea5767_read_registers(buffer)) { // Read the current state into the buffer
+        tea5767_set_mute(buffer, false); // Clear the mute bit
+        frequency = ((buffer[0] & REG_1_PLL) << 8) | buffer[1];
+        value = (float)(frequency * QUARTZ / 4 - FILTER) / 10000; // Explicitly cast to float
+        tea5767_SetFreqMHz(value / 100.0); // Pass the float value, not the pointer
+    }
+}
+
+void tea5767_SetFreqKHz(int freq_khz) {
+    uint8_t buffer[5];
+    if(tea5767_init(buffer)) {
+        tea5767_set_frequency(buffer, freq_khz);
+    }
+}
+
+void tea5767_SetFreqMHz(float freq_mhz) {
+    uint8_t buffer[5];
+    if(tea5767_init(buffer)) {
+        int freq_khz = (int)(freq_mhz * 100.0); // Convert MHz to kHz
+        tea5767_set_frequency(buffer, freq_khz);
+    }
+}
+
+float tea5767_GetFreq() {
+    uint8_t buffer[5];
+    int value;
+    if(tea5767_get_frequency(buffer, &value)) {
+        return value / 100.0; // Convert to MHz
+    }
+    return -1; // Error
+}
+
+void tea5767_sleep(uint8_t* buffer) {
+    if(tea5767_read_registers(buffer)) {
+        buffer[REG_4] |= REG_4_STBY; // Set the Standby bit in register 4 to enter standby mode
+        tea5767_write_registers(buffer);
+    }
+}

fm_radio/TEA5767/TEA5767.h

@@ -0,0 +1,104 @@
+/**
+ * @file TEA5767.h
+ * @author Coolshrimp - CoolshrimpModz.com
+ * @brief Header file for controlling the TEA5767 FM radio chip.
+ * @version 0.1
+ * @date 2023-09-29
+ * 
+ * 
+ * TEA5767 Datasheet: https://www.sparkfun.com/datasheets/Wireless/General/TEA5767.pdf
+ * 
+ * 
+ * @copyright GPLv3
+ * 
+ */
+
+#ifndef TEA5767_H
+#define TEA5767_H
+
+#include <stdbool.h>
+#include <stdint.h>
+
+// Definitions for the Wire communication
+#define TEA5767_ADR 0xC0 // I2C address of TEA5767
+// #define TEA5767_ADR 0x60 // I2C address of TEA5767
+
+// Radio chip specific definitions including the registers
+#define QUARTZ 32768 // Frequency of the quartz crystal in Hz
+#define FILTER 225000 // Frequency of the filter in Hz
+
+// Define the registers
+#define REG_1      0x00 // Register 1 address
+#define REG_1_MUTE 0x80 // Mute: 1 to mute the audio output, 0 to unmute
+#define REG_1_SM   0x40 // Search Mode: 1 to activate search mode, 0 for normal mode
+#define REG_1_PLL  0x3F // PLL Setting: Sets the PLL value (6 bits)
+
+#define REG_2     0x01 // Register 2 address
+#define REG_2_PLL 0xFF // PLL Setting: Sets the PLL value (8 bits)
+
+#define REG_3     0x02 // Register 3 address
+#define REG_3_SUD 0x80 // Search Up/Down: 1 to search up, 0 to search down
+#define REG_3_SSL 0x60 // Search Stop Level: Sets the level at which the search stops (2 bits)
+#define REG_3_HLSI \
+    0x10 // High/Low Side Injection: 1 for high side LO injection, 0 for low side LO injection
+#define REG_3_MS   0x08 // Mono to Stereo: 1 to force mono, 0 for stereo
+#define REG_3_MR   0x04 // Mute Right: 1 to mute the right audio channel and force mono, 0 to unmute
+#define REG_3_ML   0x02 // Mute Left: 1 to mute the left audio channel and force mono, 0 to unmute
+#define REG_3_SWP1 0x01 // Software programmable port 1: 1 for HIGH, 0 for LOW
+
+#define REG_4       0x03 // Register 4 address
+#define REG_4_SWP2  0x80 // Software programmable port 2: 1 for HIGH, 0 for LOW
+#define REG_4_STBY  0x40 // Standby: 1 to activate standby mode, 0 to deactivate
+#define REG_4_BL    0x20 // Band Limits: 1 for Japanese FM band, 0 for US/Europe FM band
+#define REG_4_XTAL  0x10 // Clock frequency: Sets the clock frequency (see Table 16)
+#define REG_4_SMUTE 0x08 // Soft Mute: 1 to activate soft mute, 0 to deactivate
+#define REG_4_HCC   0x04 // High Cut Control: 1 to activate high cut control, 0 to deactivate
+#define REG_4_SNC \
+    0x02 // Stereo Noise Cancelling: 1 to activate stereo noise cancelling, 0 to deactivate
+#define REG_4_SI \
+    0x01 // Search Indicator: 1 for ready flag output on pin SWPORT1, 0 for software programmable port 1
+
+#define REG_5 0x04 // Register 5 address
+#define REG_5_PLLREF \
+    0x80 // PLL Ref: 1 to enable the 6.5 MHz reference frequency for the PLL, 0 to disable
+#define REG_5_DTC 0x40 // De-emphasis Time Constant: 1 for 75 µs, 0 for 50 µs
+
+/// The BANDs TEA5767 can tune to.
+typedef enum {
+    RADIO_BAND_FM = 0x01, ///< FM band 87.5 - 108 MHz (USA, Europe) selected.
+    RADIO_BAND_FM_JAPAN = 0x02 ///< FM band 76 - 90 MHz (Japan) selected.
+} RADIO_BAND;
+
+/// A structure that contains information about the radio features from the chip.
+struct RADIO_INFO {
+    float frequency; // Frequency in MHz
+    int signalLevel; // Signal level
+    bool stereo; // Stereo or not
+    bool muted; // Muted or not
+    char signalQuality[10]; // Field for signal quality text
+};
+
+// Function prototypes
+bool tea5767_is_device_ready();
+bool tea5767_read_registers(uint8_t* buffer);
+bool tea5767_write_registers(uint8_t* buffer);
+bool tea5767_init(uint8_t* buffer);
+bool tea5767_set_mute(uint8_t* buffer, bool mute);
+bool tea5767_set_stereo(uint8_t* buffer, bool stereo);
+bool tea5767_seek(uint8_t* buffer, bool seek_up);
+bool tea5767_get_frequency(uint8_t* buffer, int* value);
+bool tea5767_set_frequency(uint8_t* buffer, int value);
+bool tea5767_get_radio_info(uint8_t* buffer, struct RADIO_INFO* info);
+
+// New high-level function prototypes
+void tea5767_sleep(uint8_t* buffer);
+void tea5767_seekUp();
+void tea5767_seekDown();
+void tea5767_ToggleMute();
+void tea5767_MuteOn();
+void tea5767_MuteOff();
+void tea5767_SetFreqKHz(int freq_khz);
+void tea5767_SetFreqMHz(float freq_mhz);
+float tea5767_GetFreq();
+
+#endif // TEA5767_H

fm_radio/TEA5767/examples.md

@@ -0,0 +1,88 @@
+## Example calls for TEA5767.c library<br>
+
+Device Initialization and Readiness<br>
+----------------------------------<br>
+uint8_t buffer[5];<br>
+bool is_ready = tea5767_is_device_ready();<br>
+
+Read/Write Registers<br>
+--------------------<br>
+bool read_success = tea5767_read_registers(buffer);<br>
+bool write_success = tea5767_write_registers(buffer);<br>
+
+Initialize the Device<br>
+---------------------<br>
+bool init_success = tea5767_init(buffer);<br>
+
+Set Mute<br>
+--------<br>
+bool mute_success = tea5767_set_mute(buffer, true);  // To mute<br>
+bool unmute_success = tea5767_set_mute(buffer, false);  // To unmute<br>
+
+Set Stereo<br>
+----------<br>
+bool stereo_on = tea5767_set_stereo(buffer, true);  // Stereo ON<br>
+bool stereo_off = tea5767_set_stereo(buffer, false);  // Stereo OFF<br>
+
+Seek<br>
+----<br>
+bool seek_up_success = tea5767_seek(buffer, true);  // Seek up<br>
+bool seek_down_success = tea5767_seek(buffer, false);  // Seek down<br>
+
+Get/Set Frequency<br>
+-----------------<br>
+int frequency_khz;<br>
+bool get_freq_success = tea5767_get_frequency(buffer, &frequency_khz);<br>
+bool set_freq_success = tea5767_set_frequency(buffer, 101900);  // Set to 101.9 MHz<br>
+
+Get Radio Information<br>
+---------------------<br>
+struct RADIO_INFO radio_info;<br>
+bool get_info_success = tea5767_get_radio_info(buffer, &radio_info);<br>
+
+Higher-Level Functions<br>
+----------------------<br>
+tea5767_seekUp();  // Seek to next station up<br>
+tea5767_seekDown();  // Seek to next station down<br>
+tea5767_ToggleMute();  // Toggle mute state<br>
+tea5767_MuteOn();  // Mute the device<br>
+tea5767_MuteOff();  // Unmute the device<br>
+tea5767_SetFreqKHz(101900);  // Set frequency to 101.9 MHz<br>
+tea5767_SetFreqMHz(101.9);  // Set frequency to 101.9 MHz<br>
+float current_freq = tea5767_GetFreq();  // Get current frequency in MHz<br>
+tea5767_sleep(buffer);  // Put the device to sleep<br>
+
+## i2C Registers for TEA5767:<br>
+// Define the registers<br>
+#define REG_1 0x00  // Register 1 address<br>
+#define REG_1_MUTE 0x80  // Mute: 1 to mute the audio output, 0 to unmute<br>
+#define REG_1_SM 0x40  // Search Mode: 1 to activate search mode, 0 for normal mode<br>
+#define REG_1_PLL 0x3F  // PLL Setting: Sets the PLL value (6 bits)<br>
+
+#define REG_2 0x01  // Register 2 address<br>
+#define REG_2_PLL 0xFF  // PLL Setting: Sets the PLL value (8 bits)<br>
+
+#define REG_3 0x02  // Register 3 address<br>
+#define REG_3_SUD 0x80  // Search Up/Down: 1 to search up, 0 to search down<br>
+#define REG_3_SSL 0x60  // Search Stop Level: Sets the level at which the search stops (2 bits)<br>
+#define REG_3_HLSI 0x10  // High/Low Side Injection: 1 for high side LO injection, 0 for low side LO injection<br>
+#define REG_3_MS 0x08  // Mono to Stereo: 1 to force mono, 0 for stereo<br>
+#define REG_3_MR 0x04  // Mute Right: 1 to mute the right audio channel and force mono, 0 to unmute<br>
+#define REG_3_ML 0x02  // Mute Left: 1 to mute the left audio channel and force mono, 0 to unmute<br>
+#define REG_3_SWP1 0x01  // Software programmable port 1: 1 for HIGH, 0 for LOW<br>
+
+#define REG_4 0x03  // Register 4 address<br>
+#define REG_4_SWP2 0x80  // Software programmable port 2: 1 for HIGH, 0 for LOW<br>
+#define REG_4_STBY 0x40  // Standby: 1 to activate standby mode, 0 to deactivate<br>
+#define REG_4_BL 0x20  // Band Limits: 1 for Japanese FM band, 0 for US/Europe FM band<br>
+#define REG_4_XTAL 0x10  // Clock frequency: Sets the clock frequency (see Table 16)<br>
+#define REG_4_SMUTE 0x08  // Soft Mute: 1 to activate soft mute, 0 to deactivate<br>
+#define REG_4_HCC 0x04  // High Cut Control: 1 to activate high cut control, 0 to deactivate<br>
+#define REG_4_SNC 0x02  // Stereo Noise Cancelling: 1 to activate stereo noise cancelling, 0 to deactivate<br>
+#define REG_4_SI 0x01  // Search Indicator: 1 for ready flag output on pin SWPORT1, 0 for software programmable port 1<br>
+
+#define REG_5 0x04  // Register 5 address<br>
+#define REG_5_PLLREF 0x80  // PLL Ref: 1 to enable the 6.5 MHz reference frequency for the PLL, 0 to disable<br>
+#define REG_5_DTC 0x40  // De-emphasis Time Constant: 1 for 75 µs, 0 for 50 µs<br>
+<br><br><br><br>
+## Created By: Coolshrimp - https://CoolshrimpModz.com<br>

fm_radio/application.fam

@@ -0,0 +1,14 @@
+App(
+    appid="fm_radio",
+    name="[TEA5767] FM Radio",
+    apptype=FlipperAppType.EXTERNAL,
+    entry_point="my_fm_radio",
+    stack_size=1 * 1024,
+    fap_category="GPIO",
+    fap_icon="radio.png",
+    fap_icon_assets="images",
+    fap_author="coolshrimp",
+    fap_weburl="https://github.com/coolshrimp/flipperzero-firmware-wPlugins/tree/420/applications/external/FM_Radio",
+    fap_version=(1, 1),
+    fap_description="FM Radio App",
+)

fm_radio/radio.c

@@ -0,0 +1,485 @@
+/**
+ *
+ * @author Coolshrimp - CoolshrimpModz.com
+ *
+ * @brief FM Radio using the TEA5767 FM radio chip.
+ * @version 1.1
+ * @date 2023-09-29
+ * 
+ * @copyright GPLv3
+ */
+
+#include <furi.h>
+#include <furi_hal.h>
+#include <stdint.h>
+#include <gui/gui.h>
+#include <gui/view.h>
+#include <gui/elements.h>
+#include <gui/view_dispatcher.h>
+#include <gui/modules/submenu.h>
+#include <gui/modules/widget.h>
+#include <gui/modules/variable_item_list.h>
+#include <notification/notification.h>
+#include <notification/notification_messages.h>
+#include <stdbool.h> // for true/false
+#include <stdint.h> // for uint8_t, size_t
+#include <stdio.h> // for snprintf
+#include <math.h> // for fabsf
+#include "TEA5767/TEA5767.h"
+#include <gui/icon_i.h>
+#include "fm_radio_icons.h"
+
+// Define macros for easier management
+#define BACKLIGHT_ALWAYS_ON
+#define TAG "FM_Radio"
+
+// Declare global variables
+uint8_t volume_values[] = {0, 1};
+char* volume_names[] = {"Un-Muted", "Muted"};
+bool current_volume = 1; // Current volume state
+int* signal_strength; // Signal strength (unused, consider removing or implementing)
+uint8_t tea5767_registers[5];
+uint32_t current_station_index = 0; // Default to the first frequency
+
+// Station struct to hold frequency and station name
+struct Station {
+    float frequency;
+    char* name;
+};
+
+#define NUM_VOLUME_VALUES (sizeof(volume_values) / sizeof(volume_values[0]))
+#define NUM_STATIONS      (sizeof(stations) / sizeof(stations[0]))
+
+// Array of Stations
+struct Station stations[] = {
+    {88.1, "CIND Indie 88"},
+    {88.9, "CIRV Portuguese"},
+    {89.5, "CIUT FM"},
+    {89.7, "89.7 K-Love"},
+    {90.3, "Ici Musique"},
+    {91.1, "JAZZ.FM91"},
+    {92.3, "Zeta 92"},
+    {92.5, "KiSS Radio"},
+    {93.1, "Easy 93.1"},
+    {93.5, "93.5 Today"},
+    {93.9, "Urbana FM"},
+    {94.1, "CBC Music"},
+    {94.5, "Star 94.5"},
+    {95.7, "Ritmo 95.7"},
+    {95.9, "KX96"},
+    {96.3, "Classical 96.3"},
+    {96.5, "Power 96"},
+    {97.3, "Hits 97.3"},
+    {98.1, "CHFI"},
+    {98.3, "Mix 98.3"},
+    {98.7, "Flow 98.7"},
+    {99.1, "99 Jamz"},
+    {99.5, "Viva FM"},
+    {99.9, "99.9 Kiss Country"},
+    {100.3, "Rumba FM"},
+    {100.7, "Y100.7"},
+    {101.1, "The Rock Station"},
+    {101.3, "CMR Diversity"},
+    {101.5, "101.5 Lite FM"},
+    {102.1, "102.1 Edge"},
+    {102.7, "102.7 The Beach"},
+    {103.5, "The Beat 103.5"},
+    {103.9, "Proud FM"},
+    {104.5, "CHUM"},
+    {105.1, "HOT 105"},
+    {105.5, "VIBE1055 FM"},
+    {106.5, "106.5 Elmnt"},
+    {106.7, "106.7 El Zol"},
+    {107.1, "Q107"},
+    {107.5, "Amor 107.5"},
+};
+
+// Function prototypes for forward declarations
+void elements_button_top_left(Canvas* canvas, const char* str);
+void elements_button_top_right(Canvas* canvas, const char* str);
+//lib can only do bottom left/right
+void elements_button_top_left(Canvas* canvas, const char* str) {
+    const uint8_t button_height = 10; // Define the height of the button
+    const uint8_t vertical_offset = 2; // Define the vertical offset of the text
+    const uint8_t horizontal_offset = 2; // Define the horizontal offset of the text
+    const uint8_t string_width = canvas_string_width(canvas, str);
+    const Icon* icon = &I_ButtonUp;
+    const uint8_t icon_h_offset = 2;
+    const uint8_t icon_width_with_offset = icon->width + icon_h_offset;
+    const uint8_t icon_v_offset = icon->height + vertical_offset;
+    const uint8_t button_width = string_width + horizontal_offset * 2 + icon_width_with_offset;
+
+    const uint8_t x = 0;
+    const uint8_t y = 0 + button_height;
+
+    canvas_draw_box(canvas, x, y - button_height, button_width, button_height); // Draw the button
+    canvas_draw_line(
+        canvas,
+        x + button_width + 0,
+        y - button_height,
+        x + button_width + 0,
+        y - 1); // Draw the button border
+    canvas_draw_line(
+        canvas,
+        x + button_width + 1,
+        y - button_height,
+        x + button_width + 1,
+        y - 2); // Draw the button border
+    canvas_draw_line(
+        canvas,
+        x + button_width + 2,
+        y - button_height,
+        x + button_width + 2,
+        y - 3); // Draw the button border
+
+    canvas_invert_color(canvas); // Invert the color of the text and icon
+    canvas_draw_str(
+        canvas,
+        x + horizontal_offset + icon_width_with_offset,
+        y - vertical_offset,
+        str); // Draw the text
+    canvas_draw_icon(canvas, x - horizontal_offset - icon->width, y - icon_v_offset, &I_ButtonUp);
+    canvas_invert_color(canvas); // Invert the color of the text and icon
+}
+
+void elements_button_top_right(Canvas* canvas, const char* str) {
+    const uint8_t button_height = 10;
+    const uint8_t vertical_offset = 2;
+    const uint8_t horizontal_offset = 2;
+    const uint8_t string_width = canvas_string_width(canvas, str);
+    const Icon* icon = &I_ButtonUp;
+    const uint8_t icon_h_offset = 2;
+    const uint8_t icon_width_with_offset = icon->width + icon_h_offset;
+    const uint8_t icon_v_offset = icon->height + vertical_offset;
+    const uint8_t button_width = string_width + horizontal_offset * 2 + icon_width_with_offset;
+
+    const uint8_t x = canvas_width(canvas);
+    const uint8_t y = 0 + button_height;
+
+    canvas_draw_box(canvas, x - button_width, y - button_height, button_width, button_height);
+    canvas_draw_line(canvas, x - button_width - 1, y - button_height, x - button_width - 1, y - 1);
+    canvas_draw_line(canvas, x - button_width - 2, y - button_height, x - button_width - 2, y - 2);
+    canvas_draw_line(canvas, x - button_width - 3, y - button_height, x - button_width - 3, y - 3);
+
+    canvas_invert_color(canvas);
+    canvas_draw_str(canvas, x - button_width + horizontal_offset, y - vertical_offset, str);
+    canvas_draw_icon_ex(
+        canvas, x + horizontal_offset, y - icon_v_offset, &I_ButtonUp, IconRotation180);
+    canvas_invert_color(canvas);
+}
+
+// Enumerations for submenu and view indices
+typedef enum {
+    MyAppSubmenuIndexConfigure,
+    MyAppSubmenuIndexFlipTheWorld,
+    MyAppSubmenuIndexAbout,
+} MyAppSubmenuIndex;
+
+typedef enum {
+    MyAppViewSubmenu,
+    MyAppViewConfigure,
+    MyAppViewFlipTheWorld,
+    MyAppViewAbout,
+} MyAppView;
+
+// Define a struct to hold the application's components
+typedef struct {
+    ViewDispatcher* view_dispatcher;
+    NotificationApp* notifications;
+    Submenu* submenu;
+    VariableItemList* variable_item_list_config;
+    View* view_flip_the_world;
+    Widget* widget_about;
+} MyApp;
+
+// Define a model struct for your application
+typedef struct {
+    uint32_t current_station_index;
+    uint8_t volume_index;
+} MyModel;
+
+// Callback for navigation events
+
+uint32_t my_app_navigation_exit_callback(void* context) {
+    UNUSED(context);
+    uint8_t buffer[5]; // Create a buffer to hold the TEA5767 register values
+    tea5767_sleep(buffer); // Call the tea5767_sleep function, passing the buffer as an argument
+    return VIEW_NONE;
+}
+
+// Callback for navigating to the submenu
+uint32_t my_app_navigation_submenu_callback(void* context) {
+    UNUSED(context);
+    return MyAppViewSubmenu;
+}
+
+// Callback for handling submenu selections
+void my_app_submenu_callback(void* context, uint32_t index) {
+    MyApp* app = (MyApp*)context;
+    switch(index) {
+    case MyAppSubmenuIndexConfigure:
+        view_dispatcher_switch_to_view(app->view_dispatcher, MyAppViewConfigure);
+        break;
+    case MyAppSubmenuIndexFlipTheWorld:
+        view_dispatcher_switch_to_view(app->view_dispatcher, MyAppViewFlipTheWorld);
+        break;
+    case MyAppSubmenuIndexAbout:
+        view_dispatcher_switch_to_view(app->view_dispatcher, MyAppViewAbout);
+        break;
+    default:
+        break;
+    }
+}
+
+bool my_app_view_input_callback(InputEvent* event, void* context) {
+    UNUSED(context);
+    if(event->type == InputTypeShort && event->key == InputKeyLeft) {
+        tea5767_seekDown();
+        current_volume = 0;
+        return true; // Event was handled
+    } else if(event->type == InputTypeShort && event->key == InputKeyRight) {
+        tea5767_seekUp();
+        current_volume = 0;
+        return true; // Event was handled
+    } else if(event->type == InputTypeShort && event->key == InputKeyOk) {
+        if(current_volume == 0) {
+            tea5767_MuteOn();
+            current_volume = 1;
+        } else {
+            tea5767_MuteOff();
+            current_volume = 0;
+        }
+        return true; // Event was handled
+    } else if(event->type == InputTypeShort && event->key == InputKeyUp) {
+        // Increment the current station index and loop back if at the end
+        current_station_index = (current_station_index + 1) % NUM_STATIONS;
+        // Set the new frequency from the stations array
+        tea5767_SetFreqMHz(stations[current_station_index].frequency);
+        current_volume = 0;
+        return true; // Event was handled
+    } else if(event->type == InputTypeShort && event->key == InputKeyDown) {
+        // Decrement the current station index and loop back if at the beginning
+        if(current_station_index == 0) {
+            current_station_index = NUM_STATIONS - 1;
+        } else {
+            current_station_index--;
+        }
+        // Set the new frequency from the stations array
+        tea5767_SetFreqMHz(stations[current_station_index].frequency);
+        current_volume = 0;
+        return true; // Event was handled
+    }
+    return false; // Event was not handled
+}
+
+// Callback for handling frequency changes
+void my_app_frequency_change(VariableItem* item) {
+    MyApp* app = variable_item_get_context(item);
+    uint8_t index = variable_item_get_current_value_index(item);
+    MyModel* model = view_get_model(app->view_flip_the_world);
+    model->current_station_index = index;
+
+    // Display the selected frequency value as text
+    char frequency_display[16];
+    snprintf(
+        frequency_display,
+        sizeof(frequency_display),
+        "%.1f MHz",
+        (double)stations[(int)index].frequency);
+    variable_item_set_current_value_text(item, frequency_display);
+}
+
+// Callback for handling volume changes
+void my_app_volume_change(VariableItem* item) {
+    MyApp* app = variable_item_get_context(item);
+    uint8_t index = variable_item_get_current_value_index(item);
+    variable_item_set_current_value_text(
+        item, volume_names[index]); // Display the selected volume as text
+    MyModel* model = view_get_model(app->view_flip_the_world);
+    model->volume_index = index;
+}
+
+// Declare local buffers for text display
+char frequency_display[64];
+char station_display[256];
+char signal_display[64];
+char volume_display[32];
+
+// Callback for drawing the view
+void my_app_view_draw_callback(Canvas* canvas, void* model) {
+    (void)model;
+
+    // Draw strings on the canvas
+    canvas_set_font(canvas, FontPrimary);
+    canvas_draw_str(canvas, 33, 10, "FM Radio");
+    canvas_draw_icon(canvas, 83, 0, &I_RadioSmall);
+
+    // Draw button prompts
+    canvas_set_font(canvas, FontSecondary);
+    elements_button_top_left(canvas, "Pre");
+    elements_button_top_right(canvas, "Pre");
+    elements_button_left(canvas, "Scan-");
+    elements_button_center(canvas, "Mute");
+    elements_button_right(canvas, "Scan+");
+
+    struct RADIO_INFO info; // Create a struct to hold the radio info
+    uint8_t buffer[5]; // Create a buffer to hold the TEA5767 register values
+    if(tea5767_get_radio_info(buffer, &info)) {
+        snprintf(
+            frequency_display,
+            sizeof(frequency_display),
+            "Frequency: %.1f MHz",
+            (double)info.frequency);
+        float tolerance = 0.05f;
+        float diff = stations[current_station_index].frequency - info.frequency;
+        if(fabsf(diff) < tolerance) {
+            snprintf(
+                station_display,
+                sizeof(station_display),
+                "%s",
+                stations[current_station_index].name);
+        } else {
+            station_display[0] = '\0';
+        }
+        snprintf(
+            volume_display,
+            sizeof(volume_display),
+            "Status: %s %s",
+            info.muted ? "Playing" : "Muted",
+            info.stereo ? "(Mono)" : "(Stereo)");
+        snprintf(
+            signal_display,
+            sizeof(signal_display),
+            "Signal: %d (%s)",
+            info.signalLevel,
+            info.signalQuality);
+    } else {
+        // Display error message if TEA5767 is not detected
+        snprintf(frequency_display, sizeof(frequency_display), "TEA5767 Not Detected");
+        snprintf(signal_display, sizeof(signal_display), "Pin 15 = SDA | Pin 16 = SLC");
+        // Reset frequency_display and volume_display to blank
+        station_display[0] = '\0';
+        volume_display[0] = '\0';
+    }
+
+    // Display the stored values on the 5th loop
+    canvas_set_font(canvas, FontPrimary);
+    canvas_draw_str(canvas, 10, 20, station_display);
+    canvas_set_font(canvas, FontSecondary);
+    canvas_draw_str(canvas, 10, 30, frequency_display);
+    canvas_draw_str(canvas, 10, 40, volume_display);
+    canvas_draw_str(canvas, 10, 49, signal_display);
+}
+
+// Allocate memory for the application
+MyApp* my_app_alloc() {
+    MyApp* app = (MyApp*)malloc(sizeof(MyApp));
+    Gui* gui = furi_record_open(RECORD_GUI);
+    // Initialize the view dispatcher
+    app->view_dispatcher = view_dispatcher_alloc();
+    view_dispatcher_enable_queue(app->view_dispatcher);
+    view_dispatcher_attach_to_gui(app->view_dispatcher, gui, ViewDispatcherTypeFullscreen);
+
+    // Initialize the submenu
+    app->submenu = submenu_alloc();
+    submenu_add_item(
+        app->submenu, "Listen Now", MyAppSubmenuIndexFlipTheWorld, my_app_submenu_callback, app);
+    //submenu_add_item(app->submenu, "Config", MyAppSubmenuIndexConfigure, my_app_submenu_callback, app);
+    submenu_add_item(app->submenu, "About", MyAppSubmenuIndexAbout, my_app_submenu_callback, app);
+    view_set_previous_callback(submenu_get_view(app->submenu), my_app_navigation_exit_callback);
+    view_dispatcher_add_view(
+        app->view_dispatcher, MyAppViewSubmenu, submenu_get_view(app->submenu));
+    view_dispatcher_switch_to_view(app->view_dispatcher, MyAppViewSubmenu);
+
+    // Initialize the variable item list for configuration
+    app->variable_item_list_config = variable_item_list_alloc();
+    variable_item_list_reset(app->variable_item_list_config);
+
+    // Add frequency configuration
+    VariableItem* frequency_item = variable_item_list_add(
+        app->variable_item_list_config, "Freq (MHz)", NUM_STATIONS, my_app_frequency_change, app);
+
+    uint32_t current_station_index = 0;
+    variable_item_set_current_value_index(frequency_item, current_station_index);
+    // Add volume configuration
+    VariableItem* volume_item = variable_item_list_add(
+        app->variable_item_list_config,
+        "Volume",
+        COUNT_OF(volume_values),
+        my_app_volume_change,
+        app);
+    uint8_t volume_index = 0;
+    variable_item_set_current_value_index(volume_item, volume_index);
+    view_set_previous_callback(
+        variable_item_list_get_view(app->variable_item_list_config),
+        my_app_navigation_submenu_callback);
+    view_dispatcher_add_view(
+        app->view_dispatcher,
+        MyAppViewConfigure,
+        variable_item_list_get_view(app->variable_item_list_config));
+
+    // Initialize the view for flipping the world
+    app->view_flip_the_world = view_alloc();
+    view_set_draw_callback(app->view_flip_the_world, my_app_view_draw_callback);
+    view_set_input_callback(app->view_flip_the_world, my_app_view_input_callback);
+    view_set_previous_callback(app->view_flip_the_world, my_app_navigation_submenu_callback);
+    view_allocate_model(app->view_flip_the_world, ViewModelTypeLockFree, sizeof(MyModel));
+    MyModel* model = view_get_model(app->view_flip_the_world);
+    model->current_station_index = current_station_index;
+    model->volume_index = volume_index;
+    view_dispatcher_add_view(
+        app->view_dispatcher, MyAppViewFlipTheWorld, app->view_flip_the_world);
+
+    // Initialize the widget for displaying information about the app
+    app->widget_about = widget_alloc();
+    widget_add_text_scroll_element(
+        app->widget_about,
+        0,
+        0,
+        128,
+        64,
+        "FM Radio (v1.1)\n"
+        "---\n"
+        "Created By Coolshrimp\n\n"
+        "Up = Preset Up\n"
+        "Down = Preset Down\n"
+        "Left = Seek Down\n"
+        "Right = Seek Up\n"
+        "OK = Toggle Mute");
+
+    view_set_previous_callback(
+        widget_get_view(app->widget_about), my_app_navigation_submenu_callback);
+    view_dispatcher_add_view(
+        app->view_dispatcher, MyAppViewAbout, widget_get_view(app->widget_about));
+    app->notifications = furi_record_open(RECORD_NOTIFICATION);
+#ifdef BACKLIGHT_ALWAYS_ON
+    notification_message(app->notifications, &sequence_display_backlight_enforce_on);
+#endif
+    return app;
+}
+// Free memory used by the application
+void my_app_free(MyApp* app) {
+#ifdef BACKLIGHT_ALWAYS_ON
+    notification_message(app->notifications, &sequence_display_backlight_enforce_auto);
+#endif
+    furi_record_close(RECORD_NOTIFICATION);
+    view_dispatcher_remove_view(app->view_dispatcher, MyAppViewAbout);
+    widget_free(app->widget_about);
+    view_dispatcher_remove_view(app->view_dispatcher, MyAppViewFlipTheWorld);
+    view_free(app->view_flip_the_world);
+    view_dispatcher_remove_view(app->view_dispatcher, MyAppViewConfigure);
+    variable_item_list_free(app->variable_item_list_config);
+    view_dispatcher_remove_view(app->view_dispatcher, MyAppViewSubmenu);
+    submenu_free(app->submenu);
+    view_dispatcher_free(app->view_dispatcher);
+    furi_record_close(RECORD_GUI);
+    free(app);
+}
+// Main function to start the application
+int32_t my_fm_radio(void* p) {
+    UNUSED(p);
+    MyApp* app = my_app_alloc();
+    view_dispatcher_run(app->view_dispatcher);
+    my_app_free(app);
+    return 0;
+}