0.2.0 KT0803

libraries/KT0803/.github/FUNDING.yml

@@ -1,4 +1,4 @@
 # These are supported funding model platforms
 
 github: RobTillaart
-
+custom: "https://www.paypal.me/robtillaart"

libraries/KT0803/.github/workflows/arduino-lint.yml

@@ -6,7 +6,7 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: arduino/arduino-lint-action@v1
         with:
           library-manager: update

libraries/KT0803/.github/workflows/arduino_test_runner.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: 2.6

libraries/KT0803/.github/workflows/jsoncheck.yml

@@ -10,7 +10,7 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: json-syntax-check
         uses: limitusus/json-syntax-check@v1
         with:

libraries/KT0803/CHANGELOG.md

@@ -6,5 +6,18 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
 
+## [0.2.0] - 2024-03-09
+- Fix #2 frequency to channel formula
+- add derived **class KT0803K**
+- add examples
+- add parameter checks functions.
+- add default frequency + mute to **begin()**
+- update documentation
+- update GitHub actions
+- minor edits
+
+
+----
+
 ## [0.1.0] - 2023-12-27
 - initial version

libraries/KT0803/LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2023-2023 Rob Tillaart
+Copyright (c) 2023-2024 Rob Tillaart
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

libraries/KT0803/README.md

@@ -12,10 +12,10 @@
 
 # KT0803
 
-Arduino Library for KT0803 FM transmitter.
+Arduino Library for KT0803 and KT0803K FM transmitter.
 
 
-## Legal point of attention
+### Legal point of attention
 
 In different countries there are different laws with respect to using transmitting devices 
 and their range. 
@@ -25,26 +25,96 @@ device like the KT0803 in your projects, either hobby, commercial or otherwise.
 
 ## Description
 
-This **experimental** library allows basic control of the KT0803 FM transmitter device.
+This **experimental** library allows basic control of the KT0803 and / or the KT0803K 
-It is written as I wanted to understand the possibilities and the interface of the device.
+FM transmitter device.
+It is primary written to understand the possibilities and the interface of the device.
 
-The library is not tested yet with hardware. (see future).
+The library is not tested by me with hardware yet. See future below.
 
-There are some newer, more capable, follow up devices like model K, L and M however these 
+There are some newer, more capable, follow up devices like model K, L and M.
-are not supported (yet) although they probably will work as they seem backwards compatible.
+From these only the KT0803K is supported since 0.2.0. 
+The others are not supported (yet) although they might work as they seem backwards compatible.
 
-#### Warning
 
+#### Hardware
+
+
+Read datasheet for details.
+
+**Warning**
 The KT0803 is an 3.3 Volt device and cannot be connected directly to 5V MCU's.
 
 
+```
+                   +----------+
+                   |  KT0803  |
+             GND --|  1   16  |-- PA_OUT  RF analog output
+   Crystal    XI --|  2   15  |-- GND
+   Crystal    XO --|  3   14  |-- SCL     I2C Clock
+   3.3V    IOVDD --|  4   13  |-- SCA     I2C Data
+             GND --|  5   12  |-- GND
+   in left   INL --|  6   11  |-- GND
+   in right  INR --|  7   10  |-- RSTB    Reset
+   enable     SW --|  8    9  |-- GND
+                   |          |
+                   +----------+
+```
+
+
+#### Frequency range
+
+The frequency range stated on the front page of the datasheet ==> 70 MHz - 108 MHz.
+The frequency range stated in table 2 ==> 76 MHz - 108 MHz.
+So the datasheet is at least ambiguous on this point.
+Also keep in mind that the 
+
+
+#### Differences
+
+The KT0803K device has far more options, which are not implemented yet except one.
+The resolution or step-size of the frequency.
+
+|  device   |  step-size  |  Notes  |
+|:---------:|:-----------:|:--------|
+|  KT0803   |  100 KHz    |  in code the math is done with 50 KHz
+|  KT0803K  |   50 KHz    |
+
+Backwards compatible.
+According to the datasheet code for the KT0803 should work for the KT0803K.
+Code with the KT0803K class will probably not work on a KT0803.
+
+
+#### Transmit frequency
+
+The transmit frequency can be set with **setFrequency(MHz)** or by **setChannel(channel)**.
+Note that the channel and frequency math of the KT0803 and the KT0803K is aligned 
+in this library. This allows exchange of channel data between device types.
+
+Note that the KT0803 will internally round to use 100 KHz steps.
+
+Some examples:
+
+|  Frequency   |  Channel  |  Notes  |
+|:------------:|:---------:|:-------:|
+|   70.00 MHz  |   1400    |  channel = freq (Mhz) \* 20
+|   70.05 MHz  |   1401    |  freq = channel \* 0.05
+|   70.10 MHz  |   1402    |
+|   76.00 MHz  |   1520    |
+|   80.00 MHz  |   1600    |
+|   89.70 MHz  |   1794    |  default (see registers datasheet)
+|  100.00 MHz  |   2000    |
+|  101.30 MHz  |   2026    |
+|  105.70 MHz  |   2114    |
+|  108.00 MHz  |   2160    |
+
+
 #### Related
 
 - https://github.com/RobTillaart/KT0803
 - https://www.hackster.io/hesam-moshiri/stereo-digital-fm-transmitter-circuit-arduino-code-2dbd8d
 - https://www.hackster.io/hesam-moshiri/full-digital-fm-receiver-with-arduino-and-tea5767-52be37
 - https://www.hackerstore.nl/Artikel/388
-
+- https://en.wikipedia.org/wiki/FM_broadcasting
 
 
 ## Interface
@@ -53,85 +123,152 @@ The KT0803 is an 3.3 Volt device and cannot be connected directly to 5V MCU's.
 #include "KT0803.h"
 ```
 
-`
 #### Constructor
 
-- **KT0803(uint8_t address, TwoWire \*wire = &Wire)** constructor, 
+- **KT0803(TwoWire \*wire = &Wire)** constructor, 
 optional Wire interface.
-- **bool begin()** initializes the library.
+- **KT0803K(TwoWire \*wire = &Wire)** constructor, 
+optional Wire interface.
+- **bool begin(float freq = 90.0, bool mute = true)** initializes the library.
 Furthermore it checks if the deviceAddress is available on the I2C bus.
+Default it sets the frequency to 90 MHz and **mutes the signal**.
 Returns true if deviceAddress is found on the bus, false otherwise.
 - **bool isConnected()** test to see if deviceAddress is found on the I2C-bus.
 
 
 #### Frequency
 
-- **bool setFrequency(float frequency)** converts the frequency to call **setChannel()**
+- **bool setFrequency(float MHz)** converts the frequency in MHz to 
-- **float getFrequency()** returns the current frequency, can be slightly different,
+call **setChannel(channel)**. The value of channel is rounded off depending 
-due to rounding math. 
+on the resolution of the device.
-The return value if derived from **getChannel()**
+Returns false if MHz is out of range or **setChannel()** fails.
-- **bool setChannel(uint16_t channel)** sets the channel to broadcast on.
+- **float getFrequency()** returns the current frequency in MHz, can be slightly different
-- **uint16_t getChannel()** returns the set channel.
+from the set value due to rounding math mentioned above.
- 
+The return value is derived from a call to **getChannel()**
- 
+- **bool setChannel(uint16_t channel)** writes the channel to broadcast on to the device.
-#### PGA, RFGain
+This involves two or three writes to different device registers.
+- **uint16_t getChannel()** reads the selected channel from the device and 
+returns it.
 
-Read datasheet.
 
-- **bool setPGA(uint8_t pga)**
+#### PGA
-- **uint8_t getPGA()**
 
-|  pga  |  gain   |
+Read Datasheet.
-|:-----:|:-------:|
+
+The KT0803K has a **PGA_LSB** (2 bits) setting, which allows setting the gain
+with single (1) dB steps. This is not yet implemented in the library.
+
+- **bool setPGA(uint8_t pga)** sets gain according to table below.
+Returns false if pga is out of range (0..7).
+- **uint8_t getPGA()** returns 0..7, default 0.
+
+
+|  PGA  |  gain   |  notes  |
+|:-----:|:-------:|:-------:|
 |  111  |  12dB   |
 |  110  |   8dB   |
 |  101  |   4dB   |
 |  100  |   0dB   |
-|  000  |   0dB   |
+|  000  |   0dB   |  default 
 |  001  |  -4dB   |
 |  010  |  -8dB   |
 |  011  |  -12dB  |
 
-- **bool setRFGain(uint8_t rfgain);
-- **uint8_t getRFgain();
 
-TODO RFGAIN table
+#### RFGain
+
+Read Datasheet.
+
+Note: the RFGain value (4 bits) is distributed over three registers.
+PA_BIAS (register 0x05) is only supported in the KT0803K device.
+It is not yet supported in the library.
+
+- **bool setRFGain(uint8_t rfgain)** sets rfgain according to table below.
+Returns false if rfgain is out of range (0..15).
+- **uint8_t getRFgain()** returns 0..15, default 15.
+
+
+|  RFGAIN  |   RFout      |  PA_BIAS = 1 |  notes  |
+|:--------:|:------------:|:------------:|:-------:|
+|   0000   |   95.5 dBuV  |      -       |
+|   0001   |   96.5 dBuV  |      -       |
+|   0010   |   97.5 dBuV  |      -       |
+|   0011   |   98.2 dBuV  |      -       |
+|   0100   |   98.9 dBuV  |      -       |
+|   0101   |  100.0 dBuV  |      -       |
+|   0110   |  101.5 dBuV  |      -       |
+|   0111   |  102.8 dBuV  |      -       |
+|   1000   |  105.1 dBuV  |  107.2 dBuV  |
+|   1001   |  105.6 dBuV  |  108.0 dBuV  |
+|   1010   |  106.2 dBuV  |  108.7 dBuV  |
+|   1011   |  106.5 dBuV  |  109.5 dBuV  |
+|   1100   |  107.0 dBuV  |  110.3 dBuV  |
+|   1101   |  107.4 dBuV  |  111.0 dBuV  |
+|   1110   |  107.7 dBuV  |  111.7 dBuV  |
+|   1111   |  108.0 dBuV  |  112.5 dBuV  |  default
 
 
 #### Region selection
 
-Read datasheet.
+Read datasheet for details.
+
+Note that not all frequencies are allowed in all regions / countries!
 
 The first four are convenience wrappers for **setPHTCNST()**
+If some region is missing please let me know the details and I can add 
+a wrapper for it.
 
 - **void setEurope()**
 - **void setAustralia()**
 - **void setUSA()**
 - **void setJapan()**
-- **bool setPHTCNST(bool on)**
+- **bool setPHTCNST(bool on)** See table below.
-- **bool getPHTCNST()**
+- **bool getPHTCNST()** returns set value.
 
-If some region is missing please let me know and I can add it.
+|  PHTCNST  |  time   |  Region  |
+|:---------:|:-------:|:--------:|
+|    0      |  75 μs  |  USA, Japan, (default)
+|    1      |  50 μs  |  Europe, Australia
 
 
 #### PilotToneAdjust
 
 Read datasheet.
 
-- **bool setPilotToneAdjust(uint8_t mode)**  //  HIGH = 1 LOW = 0
+- **bool setPilotToneAdjust(uint8_t mode)**  HIGH = 1 LOW = 0
 - **uint8_t getPilotToneAdjust()**
 
 
 #### Mute
 
-- **bool setMute(bool mute)** enables or disables the transmitting.
+Default the device is not muted, but **begin()** will default mute it.
-- **bool getMute()** returns the current state. 
+See interface section above.
+
+- **bool setMute(bool mute)** enables or disables the transmitting
+by muting the signal.
+- **bool getMute()** returns the current state of muting.
+
+
+## Preference channels
+
+The device and library do not implement the persistant store of user 
+selectable preferences (frequencies or channels).
+This can be implemented by the user in EEPROM or another persistent medium.
+
+Think of a class that holds an array of channels and optional descriptions.
+A minimal hardcoded preset sketch is in the examples.
 
 
 ## Derived classes
 
-The KT0803K/L/M devices might work as they seem backwards compatible.
+Since 0.2.0 the KT0803K class is created, although minimally implemented.
 
+The KT0803L might work as it seems backwards compatible. It has far more
+registers in use than the KT0803/K.
+At the moment there is no intention to implement this KT0803L version.
+
+The KT0803M looks almost identical to the KT0803K (no new registers), so
+a derived class is straightforward.
 
 
 ## Future
@@ -139,39 +276,62 @@ The KT0803K/L/M devices might work as they seem backwards compatible.
 #### Must
 
 - improve documentation
-  - fill in gaps (TODO).
 - buy hardware
 - test and verify.
 
-#### Should
 
-- check validity/range parameters
+#### Should
-  - enums for parameters - readability?
-- investigate support 
-  - KT0803K, KT0803L, KT0803M (derived classes)
-- at startup
-  - mute device
-  - set 'dummy' channel
-  - preset channel array in .h file (hardcoded)
 
 
 #### Could
 
+- RESET pin as optional parameter in constructor?
+- SW pin (ON/OFF) as optional parameter in constructor?
+  - add functions for sw on/off, 
+  - what is impact on settings? 
+  - call begin () again? => default
+  - explain well doc.
+- derived class KT0803M (== K check)
+- improve error handling
+- unit tests possible?
+- extend settings upon request **bold** are interesting, see table
+
+|  device   |  setting      |  register       |  Notes  |
+|:---------:|:-------------:|:---------------:|:--------|
+|  KT0803   |  PA_CTRL      |  13, bit 2      |  **WARNING in datasheet**
+|           |               |                 |  Should it be added in API?
+|  KT0803K  |  MONO/STEREO  |  04, bit 6      |  **idem**
+|  KT0803K  |  PGA_LSB      |  04, bit 4+5    |  gain fine tuning -> see PGA_MOD
+|  KT0803K  |  FDEV         |  04, bit 2+3    |  Frequency deviation adjustment
+|  KT0803K  |  BASS         |  04, bit 0+1    |  **Bass boost control**
+|  KT0803K  |  PDPA         |  0B, bit 5      |  Power Amplifier Power Down ?
+|  KT0803K  |  PA_BIAS      |  0E, bit 1      |  PA bias current enhancement.
+|  KT0803K  |  PW_OK  (RO)  |  0F, bit 4      |  **Power OK indicator**
+|  KT0803K  |  SLNCID (RO)  |  0F, bit 2      |  1 when Silence is detected
+|  KT0803K  |  LMTLVL       |  10, bit 3+4    |  **Internal audio limiter level control**
+|  KT0803K  |  PGAMOD       |  10, bit 0      |  PGA mode selection  (use PGA_LSB/ not)
+|  KT0803K  |  SLNCDIS      |  12, bit 7      |  Silence detection disable
+|  KT0803K  |  SLNCTHL      |  12, bit 4+5+6  |  Silence detection low threshold
+|  KT0803K  |  SLNCTHH      |  12, bit 1+2+3  |  Silence detection high threshold
+|  KT0803K  |  SW_MOD       |  12, bit 0      |  **Switching channel mode selection**
+|  KT0803K  |  SLNCTIME     |  14, bit 5+6+7  |  silence detection time
+|  KT0803K  |  SLNCCNTHIGH  |  14, bit 2+3+4  |  silence detection count high
+|  KT0803K  |  SLNCCNTLOW   |  15, bit 0+1+2  |  silence detection count low
+
+
+#### Wont (for now)
+
+- investigate tea5767 FM receiver (Out of scope for this lib).
+- implement KT0803L
 - investigate efficiency of register access.
-  - caching all (allowed) registers in **begin()** 0.1.1
+  - caching all (allowed) registers in **begin()**
     -  3 bytes for KT0803
     - 12 bytes for KT0803K
   - cache frequency.
   - only writing is needed. 
-- need hardware to test.
+- send binary data over FM?
-- examples
+- preset frequency array in .h file (hardcoded)
-  - create frequency hopping device
+- enums for parameters - readability?
-  - preset channels (eeprom?)
-  - send binary data over FM?
-- investigate tea5767 FM receiver
-
-
-#### Wont
 
 
 ## Support

libraries/KT0803/examples/KT0803K_minimal/KT0803K_minimal.ino

@@ -0,0 +1,33 @@
+//
+//    FILE: KT0803K_minimal.ino
+//  AUTHOR: Rob Tillaart
+// PURPOSE: minimal demo
+//     URL: https://github.com/RobTillaart/KT0803
+
+
+#include "Arduino.h"
+#include "Wire.h"
+#include "KT0803.h"
+
+
+KT0803K FM_SEND;
+
+
+void setup()
+{
+  Serial.begin(115200);
+  while(!Serial);
+
+  Wire.begin();
+
+  FM_SEND.begin();
+  FM_SEND.setChannel(2000);  //  * 0.05 100.00 MHz
+  FM_SEND.setMute(false);
+}
+
+void loop()
+{
+}
+
+
+//  -- END OF FILE --

libraries/KT0803/examples/KT0803K_presets/KT0803K_presets.ino

@@ -0,0 +1,50 @@
+//
+//    FILE: KT0803K_minimal.ino
+//  AUTHOR: Rob Tillaart
+// PURPOSE: minimal demo hardcoded presets
+//     URL: https://github.com/RobTillaart/KT0803
+
+
+#include "Arduino.h"
+#include "Wire.h"
+#include "KT0803.h"
+
+
+KT0803K FM_SEND;
+
+//  hardcoded presets adjust to your need.
+//  note: presets by channel would take half the memory
+float preset[10] =
+{
+  88.6, 91.3, 92.2, 96.0, 97.3,
+  98.8, 100.1, 100.3, 105.4, 107.6
+};
+
+
+void setup()
+{
+  Serial.begin(115200);
+  while (!Serial);
+
+  Wire.begin();
+
+  FM_SEND.begin(preset[0], false);
+}
+
+
+void loop()
+{
+  if (Serial.available())
+  {
+    char c = Serial.read();
+
+    if (c == 'm') FM_SEND.setMute(false);
+    if (c == 'M') FM_SEND.setMute(true);
+    //  select preset  0..9
+    int  p = c - '0';  //  convert to digit
+    if ((0 <= p) && (p <= 9)) FM_SEND.setFrequency(preset[p]);
+  }
+}
+
+
+//  -- END OF FILE --

libraries/KT0803/examples/KT0803K_setFrequency/KT0803K_setFrequency.ino

@@ -0,0 +1,39 @@
+//
+//    FILE: KT0803_setFrequency.ino
+//  AUTHOR: Rob Tillaart
+// PURPOSE: minimal demo
+//     URL: https://github.com/RobTillaart/KT0803
+
+
+#include "Arduino.h"
+#include "Wire.h"
+#include "KT0803.h"
+
+
+KT0803K FM_SEND;
+
+
+void setup()
+{
+  Serial.begin(115200);
+  while(!Serial);
+
+  Wire.begin();
+  
+  FM_SEND.begin();
+  FM_SEND.setFrequency(105.75);
+  FM_SEND.setMute(false);
+
+  Serial.print("Freq: ");
+  Serial.println(FM_SEND.getFrequency());
+  Serial.print("Channel: ");
+  Serial.println(FM_SEND.getChannel());
+}
+
+
+void loop()
+{
+}
+
+
+//  -- END OF FILE --

libraries/KT0803/examples/KT0803_minimal/KT0803_minimal.ino

@@ -18,9 +18,11 @@ void setup()
   Serial.begin(115200);
   while(!Serial);
 
+  Wire.begin();
+  
   FM_SEND.begin();
-
+  FM_SEND.setChannel(2000);  // * 0.05 = 100.00 MHz
-  FM_SEND.setChannel(1000);
+  FM_SEND.setMute(false);
 }
 
 void loop()
@@ -29,4 +31,3 @@ void loop()
 
 
 //  -- END OF FILE --
-

libraries/KT0803/examples/KT0803_setFrequency/KT0803_setFrequency.ino

@@ -0,0 +1,38 @@
+//
+//    FILE: KT0803_setFrequency.ino
+//  AUTHOR: Rob Tillaart
+// PURPOSE: minimal demo
+//     URL: https://github.com/RobTillaart/KT0803
+
+
+#include "Arduino.h"
+#include "Wire.h"
+#include "KT0803.h"
+
+
+KT0803 FM_SEND;
+
+
+void setup()
+{
+  Serial.begin(115200);
+  while(!Serial);
+
+  Wire.begin();
+  
+  FM_SEND.begin();
+  FM_SEND.setFrequency(105.75);
+  FM_SEND.setMute(false);
+
+  Serial.print("Freq: ");
+  Serial.println(FM_SEND.getFrequency());
+  Serial.print("Channel: ");
+  Serial.println(FM_SEND.getChannel());
+}
+
+void loop()
+{
+}
+
+
+//  -- END OF FILE --

libraries/KT0803/examples/KT0803_sweep_2_seconds/KT0803_sweep_2_seconds.ino

@@ -0,0 +1,37 @@
+//
+//    FILE: KT0803_sweep_2_seconds.ino
+//  AUTHOR: Rob Tillaart
+// PURPOSE: minimal demo
+//     URL: https://github.com/RobTillaart/KT0803
+
+
+#include "Arduino.h"
+#include "Wire.h"
+#include "KT0803.h"
+
+
+KT0803 FM_SEND;
+
+
+void setup()
+{
+  Serial.begin(115200);
+  while(!Serial);
+
+  Wire.begin();
+  FM_SEND.begin();
+  FM_SEND.setMute(false);
+}
+
+void loop()
+{
+  //  adjust to your local allowed frequencies
+  for (float freq = 88.0; freq <= 108.0; freq += 0.1)
+  {
+    FM_SEND.setFrequency(freq);
+    delay(2000);
+  }
+}
+
+
+//  -- END OF FILE --

libraries/KT0803/examples/KT0803_up_down/KT0803_up_down.ino

@@ -0,0 +1,69 @@
+//
+//    FILE: KT0803_up_down.ino
+//  AUTHOR: Rob Tillaart
+// PURPOSE: minimal demo
+//     URL: https://github.com/RobTillaart/KT0803
+
+
+#include "Arduino.h"
+#include "Wire.h"
+#include "KT0803.h"
+
+
+KT0803 FM_SEND;
+
+//  connect two buttons to GND
+//  adjust pins to your needs,
+uint8_t UP_PIN = 6;
+uint8_t DOWN_PIN = 7;
+float freq = 100.0;
+float newFreq = 100.0;
+
+
+void setup()
+{
+  Serial.begin(115200);
+  while (!Serial);
+
+  pinMode(UP_PIN, INPUT_PULLUP);
+  pinMode(DOWN_PIN, INPUT_PULLUP);
+  Wire.begin();
+
+  FM_SEND.begin(freq, false);
+}
+
+void loop()
+{
+  //  adjust frequency with up and down button.
+  uint8_t u = digitalRead(UP_PIN);
+  uint8_t d = digitalRead(DOWN_PIN);
+  if ((u == 0) && (d == 0))
+  {
+    newFreq = 100.0;
+  }
+  else if (u == 0)
+  {
+    newFreq += 0.1;
+    if (newFreq > 108.0) newFreq = 108.0;
+  }
+  else if (d == 0)
+  {
+    newFreq -= 0.1;
+    if (newFreq < 88.0) newFreq = 88.0;
+  }
+  if (newFreq != freq)
+  {
+    freq = newFreq;
+    FM_SEND.setFrequency(freq);
+
+    Serial.print("Freq: ");
+    Serial.print(FM_SEND.getFrequency());
+    Serial.print("\t");
+    Serial.println(FM_SEND.getChannel());
+
+    delay(100);
+  }
+}
+
+
+//  -- END OF FILE --

libraries/KT0803/keywords.txt

@@ -3,10 +3,10 @@
 
 # Data types (KEYWORD1)
 KT0803	KEYWORD1
+KT0803K	KEYWORD1
 
 
 # Methods and Functions (KEYWORD2)
-# Common
 begin	KEYWORD2
 isConnected	KEYWORD2
 

libraries/KT0803/library.json

@@ -1,7 +1,7 @@
 {
   "name": "KT0803",
-  "keywords": "Broadcast, KT0803K, KT0803L, KT0803M",
+  "keywords": "Broadcast, KT0803K, KT0803L, KT0803M, FM",
-  "description": "Arduino library for the KT0803 FM transmitter.",
+  "description": "Arduino library for the KT0803 and KT0803K FM transmitter.",
   "authors":
   [
     {
@@ -15,7 +15,7 @@
     "type": "git",
     "url": "https://github.com/RobTillaart/KT0803.git"
   },
-  "version": "0.1.0",
+  "version": "0.2.0",
   "license": "MIT",
   "frameworks": "*",
   "platforms": "*",

libraries/KT0803/library.properties

@@ -1,8 +1,8 @@
 name=KT0803
-version=0.1.0
+version=0.2.0
 author=Rob Tillaart <rob.tillaart@gmail.com>
 maintainer=Rob Tillaart <rob.tillaart@gmail.com>
-sentence=Arduino library for the KT0803 FM transmitter.
+sentence=Arduino library for the KT0803 and KT0803K FM transmitter.
 paragraph=KT0803K, KT0803L, KT0803M
 category=Communication
 url=https://github.com/RobTillaart/KT0803

libraries/KT0803/src/KT0803.cpp

@@ -1,8 +1,8 @@
 //
 //    FILE: KT0803.cpp
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.1.0
+// VERSION: 0.2.0
-// PURPOSE: Arduino Library for KT0803 FM transmitter
+// PURPOSE: Arduino Library for KT0803 and KT0803K FM transmitter.
 //     URL: https://github.com/RobTillaart/KT0803
 
 
@@ -19,9 +19,11 @@ KT0803::KT0803(TwoWire * wire)
 }
 
 
-bool KT0803::begin()
+bool KT0803::begin(float freq, bool mute)
 {
-  return isConnected();
+  if (! isConnected()) return false;
+  if (! setMute(mute)) return false;
+  return setFrequency(freq);
 }
 
 
@@ -33,31 +35,37 @@ bool KT0803::isConnected()
 
 
 ///////////////////////////////////////////////////////////
-
+//
-
+//  FREQUENCY
-bool KT0803::setFrequency(float frequency)
+//
+bool KT0803::setFrequency(float MHz)
 {
-  return setChannel(round(frequency * 20));
+  if ((MHz < 70) || (MHz > 108)) return false;
+  //  steps 50 KHz
+  return setChannel(round(MHz * 20));  
 }
 
 
+//  MHz
 float KT0803::getFrequency()
 {
   return getChannel() * 0.05;
 }
 
 
+//  steps of 50 KHz.
 bool KT0803::setChannel(uint16_t channel)
 {
-  if (writeData(0x00, channel & 0xFF) == false) return false;
+  if ((channel < 1400) || (channel > 2160)) return false;
-
+  //  need to split over 3 registers
-  uint8_t data = readData(0x01);
+  //  register 2 part skipped (always 0) for KT0803
-  data &= 0xF8;   //  keep other bits
+  uint16_t ch = channel >> 1;
-  data |= (channel >> 8) & 0x07;
+  //  register 0
+  if (writeData(0x00, ch & 0xFF) == false) return false;
+  //  register 1
+  uint8_t data = readData(0x01) & 0xF8;  //  keep other bits
+  data |= ((ch >> 8) & 0x07);
   return writeData(0x01, data);
-
-  //  Reg02  CHSEL[0] = 0 ==> 100 KHz accuracy.
-  //  Reg02  CHSEL[0] = 1 ==> 50 KHz accuracy.   //   TODO KT0803K derived class
 }
 
 
@@ -70,8 +78,13 @@ uint16_t KT0803::getChannel()
 }
 
 
+///////////////////////////////////////////////////////////
+//
+//  GAIN
+//
 bool KT0803::setPGA(uint8_t pga)
 {
+  if (pga > 7) return false;
   uint8_t data = readData(0x01);
   data &= 0xC7;   //  keep other bits
   data |= (pga << 3);
@@ -87,6 +100,7 @@ uint8_t KT0803::getPGA()
 
 bool KT0803::setRFGain(uint8_t rfgain)
 {
+  if (rfgain > 15) return false;
   //  bits 0 and 1
   uint8_t data = readData(0x01) & 0x3F;
   data |= (rfgain & 0x03) << 6;
@@ -99,13 +113,13 @@ bool KT0803::setRFGain(uint8_t rfgain)
   data = readData(0x02) & 0xBF; 
   data |= (rfgain & 0x08) << 3;
   writeData(0x02, data);
-  return true;  //  TODO add error handling.
+  return true;
 }
 
 
 uint8_t KT0803::getRFgain()
 {
-  uint8_t data = readData(0x01) >> 6;     //  bit 0, 1
+  uint8_t data = readData(0x01) >> 6;      //  bit 0, 1
   data |= ((readData(0x13) & 0x80) >> 5);  //  bit 2
   data |= ((readData(0x02) & 0x40) >> 3);  //  bit 3
   return data;
@@ -123,6 +137,11 @@ bool KT0803::setPHTCNST(bool on)
   return writeData(0x02, data);
 }
 
+
+///////////////////////////////////////////////////////////
+//
+//  MISC
+//
 bool KT0803::getPHTCNST()
 {
   return (readData(0x02) & 0x01) > 0;
@@ -131,6 +150,7 @@ bool KT0803::getPHTCNST()
 
 bool KT0803::setPilotToneAdjust(uint8_t mode)
 {
+  if (mode > 1) return false;
   uint8_t data = readData(0x02);
   //  is the bit already OK
   if ((mode == 1) && (data & 0x04) == 0x04) return true;
@@ -147,6 +167,10 @@ uint8_t KT0803::getPilotToneAdjust()
 }
 
 
+///////////////////////////////////////////////////////////
+//
+//  MUTE
+//
 bool KT0803::setMute(bool mute)
 {
   uint8_t data = readData(0x02);
@@ -165,8 +189,6 @@ bool KT0803::getMute()
 }
 
 
-
-
 ///////////////////////////////////////////////////////////////////////
 //
 //  PROTECTED
@@ -195,5 +217,51 @@ int KT0803::readData(uint8_t reg)
 }
 
 
+/////////////////////////////////////////////////////////////////////////////
+//
+//  DERIVED CLASSES
+//
+KT0803K::KT0803K(TwoWire * wire) : KT0803(wire)
+{
+}
+
+
+bool KT0803K::setChannel(uint16_t channel)
+{
+  if ((channel < 1400) || (channel > 2160)) return false;
+  //  need to split over 3 registers
+  uint16_t ch = channel;
+  //  register 2
+  uint8_t data = readData(0x02) & 0x7F;
+  data |= (channel & 0x01) << 8;
+  if (writeData(0x02, data) == false) return false;
+  ch >>= 1;
+  //  register 0
+  if (writeData(0x00, ch & 0xFF) == false) return false;
+  //  register 1
+  ch >>= 8;
+  data = readData(0x01);
+  data &= 0xF8;   //  keep other bits
+  data |= ch & 0x07;
+  return writeData(0x01, data);
+}
+
+uint16_t KT0803K::getChannel()
+{
+  uint16_t channel = readData(0x01) & 0x07;
+  channel <<= 8;
+  channel |= readData(0x00);
+  channel <<= 1;
+  channel |= (readData(0x02) >> 0x07);
+  return channel;
+}
+
+
+///////////////////////////////////////////////////////////
+//
+//  OTHER
+//
+
+
 //  -- END OF FILE --
 

libraries/KT0803/src/KT0803.h

@@ -2,8 +2,8 @@
 //
 //    FILE: KT0803.h
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.1.0
+// VERSION: 0.2.0
-// PURPOSE: Arduino Library for KT0803 FM transmitter
+// PURPOSE: Arduino Library for KT0803 and KT0803K FM transmitter
 //     URL: https://github.com/RobTillaart/KT0803
 
 
@@ -11,7 +11,7 @@
 #include "Wire.h"
 
 
-#define KT0803_LIB_VERSION          (F("0.1.0"))
+#define KT0803_LIB_VERSION          (F("0.2.0"))
 
 
 class KT0803
@@ -19,14 +19,14 @@ class KT0803
 public:
   KT0803(TwoWire * wire = &Wire);
 
-  bool begin();
+  bool begin(float freq = 90.0, bool mute = true);
   bool isConnected();
 
 
   //  FM FREQUENCY
-  bool setFrequency(float frequency);
+  bool     setFrequency(float MHz);
-  float getFrequency();
+  float    getFrequency();
-  bool setChannel(uint16_t channel);
+  bool     setChannel(uint16_t channel);
   uint16_t getChannel();
 
 
@@ -42,7 +42,7 @@ public:
   // 011: -12dB
   uint8_t getPGA();
 
-  bool setRFGain(uint8_t rfgain);
+  bool setRFGain(uint8_t rfgain);  //  0-15
   uint8_t getRFgain();
 
 
@@ -63,7 +63,7 @@ public:
 
   //  MUTE software
   bool setMute(bool mute);  //  true == muted
-  bool getMute();         //  isMuted().
+  bool getMute();           //  isMuted().
 
 
 protected:
@@ -76,5 +76,20 @@ protected:
 };
 
 
+/////////////////////////////////////////////////////////////////////////////
+//
+//  DERIVED CLASSES
+//
+class KT0803K : public KT0803
+{
+public:
+  KT0803K(TwoWire * wire = &Wire);
+
+  //  CHANNEL
+  bool     setChannel(uint16_t channel);
+  uint16_t getChannel();
+};
+
+
 //  -- END OF FILE --