flash: setup flash memory for ip/mac/name setup

README.md

@@ -9,44 +9,47 @@ Start nix shell before anything.
 nix-shell
 ```
 
-Flash firmware onto STM32 NUCLEO-H743ZI2 using OpenOCD.
+**(For users who had completed the [networking setup](##networking-setup-for-first-time-user))** Flash firmware onto STM32 NUCLEO-H743ZI2 using OpenOCD.
 ```shell
 openocd -f openocd/openocd.cfg -f openocd/main.cfg
 ```
 
-Alternatively, an equivalent Nix command can also do the work
+**(For users who had completed the [networking setup](##networking-setup-for-first-time-user))** Alternatively, an equivalent Nix command can also do the work.
 ```shell
-openocd-flash main
+openocd-flash
 ```
 
-## Networking Setup
+## Networking Setup for First-time User
-At the moment, both IP addresses of the STM32 board and MQTT broker are hardcoded.
+Provide them to setup Humpback-DDS:
-MAC address of the STM32 board is also hardcoded.
+- IP Address of Humpback-DDS
+- Address block of the local area network
+- MAC Address of Humpback-DDS
+- IP Address of MQTT broker
+- Device name of Humpback-DDS
 
-### STM32 IP Address
+Note:
-IP address is hardcoded in the file `src/main.rs`, line 171.
+- IP/MAC address of Humpback-DDS should be unique inside a local area network.
-```rust
+- Device name should be unique among all Humpback-DDS connected to the same MQTT broker.
-store.ip_addrs[0] = net::wire::IpCidr::new(net::wire::IpAddress::v4(192, 168, 1, 200), 24);
+- The MQTT broker must accept TCP connection at port `1883`.
-```
-The IP address shown above corresponds to `192.168.1.200`, in a `/24` address block.
-Modify this line to the change the IP address of STM32 board.
 
-### STM32 MAC Address
+Use the following Nix command.
-IP address is hardcoded in the file `src/main.rs`, line 156.
+```shell
-```rust
+openocd-flash-customised <client_cidr_ip_addr> <mac_addr> <broker_addr> "<name>"
-let mac_addr = net::wire::EthernetAddress([0xAC, 0x6F, 0x7A, 0xDE, 0xD6, 0xC8]);
 ```
-The MAC address shown above corresponds to `AC::6F::7A::DE::D6::C8`.
+Parameters:
-Modify this line to the change the MAC address of STM32 board.
+- client_cidr_ip_addr: IP address for the Humpback-DDS device, in CIDR notation
+- mac_addr: MAC address for the Humpback-DDS device
+- broker_addr: IP address for the MQTT broker
+- name: Device name of the Humpback-DDS
 
-### Broker IP Address
+### Example
-IP address is hardcoded in the file `src/main.rs`, line 241.
+```shell
-```rust
+openocd-flash-customised 192.168.1.200/24 AC:6F:7A:DE:D6:C8 192.168.1.125 "Urukul"
-    IpAddr::V4(Ipv4Addr::new(192, 168, 1, 125)),
 ```
-This program will try attempt to connect to `192.168.1.125:1883`.
+The device will be named `Urukul`.  
-Modify this line to the change the IP address of MQTT broker.
+It has `192.168.1.200` as IPv4 Address, inside a `\24` network, with `AC:6F:7A:DE:D6:C8` as MAC address.  
-Note that the broker must accept TCP connection at `port 1883`.
+It will connect to a MQTT broker at `192.168.1.125:1883`.
+
 
 ## MQTT Broker
 Mosquitto is within the Nix package.
@@ -85,23 +88,26 @@ publish-mqtt Foo/Bar "baz"
 ## List of Commands
 All currently supported commands are listed below.  
 **Note: The following table only lists the subtopic. To make a full topic, add `Urukul/Control/` in front of all subtopics.**  
-Example: Full topic of Reset command: `Urukul/Control/Reset`
+### Example: Full topic of Reset command
+```shell
+Urukul/Control/Reset
+```
 
-| Subtopic| Message| Functionality|
+| Subtopic                                | Message                                                            | Functionality|
-| ---| ---| ---|
+| --------------------------------------- | ------------------------------------------------------------------ | ---|
-| `Reset`| | Reset the device|
+| `Reset`                                 |                                                                    | Reset the device|
-| `ChannelX/Switch`| `<off/on>`| Turn off/on the RF switch at channel X.|
+| `ChannelX/Switch`                       | `<off/on>`                                                         | Turn off/on the RF switch at channel X.|
-| `ChannelX/Attenuation`| `<atten> [dB]`| Set attenuation of channel X.|
+| `ChannelX/Attenuation`                  | `<atten> [dB]`                                                     | Set attenuation of channel X.|
-| `Clock/Source`| `<clk_src>`| Select the clock source of Urukul.|
+| `Clock/Source`                          | `<clk_src>`                                                        | Select the clock source of Urukul.|
-| `Clock/Frequency`| `<f_clk> [unit]`| Set the clock frequency of the clock source of Urukul.|
+| `Clock/Frequency`                       | `<f_clk> [unit]`                                                   | Set the clock frequency of the clock source of Urukul.|
-| `Clock/Source`| `<clk_div>`| Set the clock division of Urukul.|
+| `Clock/Source`                          | `<clk_div>`                                                        | Set the clock division of Urukul.|
-| `Clock`| `frequency: <f_clk> [unit], source: <clk_src>, division: <clk_div>`| Setup the clock tree for Urukul.|
+| `Clock`                                 | `frequency: <f_clk> [unit], source: <clk_src>, division: <clk_div>`| Setup the clock tree for Urukul.|
-| `ChannelX/SystemClock`| `<f_sys_clk> [unit]`| Set the system clock frequency of channel X.|
+| `ChannelX/SystemClock`                  | `<f_sys_clk> [unit]`                                               | Set the system clock frequency of channel X.|
-| `ChannelX/ProfileY/Singletone/Frequency`| `<freq> [unit]`| Setup a single tone profile at channel X, profile Y, with frequency `<freq> [unit]`.|
+| `ChannelX/ProfileY/Singletone/Frequency`| `<freq> [unit]`                                                    | Setup a single tone profile at channel X, profile Y, with frequency `<freq> [unit]`.|
-| `ChannelX/ProfileY/Singletone/Amplitude`| `<ampl>`| Setup a single tone profile at channel X, profile Y, with amplitude factor `<ampl>`.|
+| `ChannelX/ProfileY/Singletone/Amplitude`| `<ampl>`                                                           | Setup a single tone profile at channel X, profile Y, with amplitude factor `<ampl>`.|
-| `ChannelX/ProfileY/Singletone/Phase`| `<phase> [deg]`| Setup a single tone profile at channel X, profile Y, with phase `<phase> [deg]`.|
+| `ChannelX/ProfileY/Singletone/Phase`    | `<phase> [deg]`                                                    | Setup a single tone profile at channel X, profile Y, with phase `<phase> [deg]`.|
-| `ChannelX/ProfileY/Singletone`| `frequency: <freq> [unit], amplitude: <ampl>, phase: <phase>`| Setup a compelte single tone profile at channel X, profile Y.|
+| `ChannelX/ProfileY/Singletone`          | `frequency: <freq> [unit], amplitude: <ampl>, phase: <phase>`      | Setup a compelte single tone profile at channel X, profile Y.|
-| `Profile`| `<pr_num>`| Switch to a DDS profile across all channels.|
+| `Profile`                               | `<pr_num>`                                                         | Switch to a DDS profile across all channels.|
 
 ## Reset the device
 - Topic: `Urukul/Control/Reset`

memory.x

@@ -1,7 +1,7 @@
 MEMORY
 {
   /* FLASH and RAM are mandatory memory regions */
-  FLASH  : ORIGIN = 0x08000000, LENGTH = 2M
+  FLASH  : ORIGIN = 0x08000000, LENGTH = 1024K
   RAM    : ORIGIN = 0x20000000, LENGTH = 128K
 
   /* AXISRAM */

shell.nix

@@ -1,61 +1,66 @@
 let
-	mozillaOverlay = import (builtins.fetchTarball https://github.com/mozilla/nixpkgs-mozilla/archive/master.tar.gz);
+    mozillaOverlay = import (builtins.fetchTarball https://github.com/mozilla/nixpkgs-mozilla/archive/master.tar.gz);
-	pkgs = import <nixpkgs> {overlays = [mozillaOverlay];};
+    pkgs = import <nixpkgs> {overlays = [mozillaOverlay];};
 in with pkgs;
 let
-	migen			= callPackage ./nix/migen.nix {};
+    migen = callPackage ./nix/migen.nix {};
-	openocd			= callPackage ./nix/openocd.nix {};
+    openocd = callPackage ./nix/openocd.nix {};
-	rustPlatform	= callPackage ./nix/rustPlatform.nix {};
+    rustPlatform = callPackage ./nix/rustPlatform.nix {};
-	itm				= callPackage ./nix/itm.nix {inherit rustPlatform;};
+    itm = callPackage ./nix/itm.nix {inherit rustPlatform;};
 
-	runOpenOcd = writeShellScriptBin "run-openocd" ''
+    runOpenOcdBlock = writeShellScriptBin "run-openocd-block" ''
-		openocd \
+        openocd -f openocd/openocd.cfg
-		-f openocd/openocd.cfg \
+    '';
-		-c init &
-		sleep 1
-	'';
 
-	runOpenOcdBlock = writeShellScriptBin "run-openocd-block" ''
+    openocdFlash = writeShellScriptBin "openocd-flash" ''
-		openocd -f openocd/openocd.cfg
+        openocd -f openocd/openocd.cfg -f openocd/main.cfg
-	'';
+    '';
 
-	setGDBConfigFile = writeShellScriptBin "set-gdb-config-file" ''
+    publishMqtt = writeShellScriptBin "publish-mqtt" ''
-		if [[ $1 == "" ]]
+        mosquitto_pub -h localhost -t $1 -m "$2" -d
-		then
+    '';
-			sed -i "2s/.*/runner = \"gdb -q -x gdb_config\/openocd.gdb\"/" .cargo/config
-			echo "GDB config file: openocd.gdb"
-		else
-			sed -i "2s/.*/runner = \"gdb -q -x gdb_config\/$1.gdb\"/" .cargo/config
-			echo "GDB config file: $1.gdb"
-		fi
-	'';
 
-	openocdFlash = writeShellScriptBin "openocd-flash" ''
+    openOCDFlashCustomised = writeShellScriptBin "openocd-flash-customised" ''
-	    openocd -f openocd/openocd.cfg -f openocd/$1.cfg
+        IFS='.|/' read -r a b c d e <<< $1
-	'';
+        ((ip = (a << 32) + (b << 24) + (c << 16) + (d << 8) + e))
-
+        IFS=':' read -r a b c d e f <<< $2
-	publishMqtt = writeShellScriptBin "publish-mqtt" ''
+        ((mac = (16#$a << 40) + (16#$b << 32) + (16#$c << 24) + (16#$d << 16) + (16#$e << 8) + 16#$f))
-		mosquitto_pub -h localhost -t $1 -m "$2" -d
+        IFS='.' read -r a b c d <<< $3
-	'';
+        ((broker_ip = (a << 24) + (b << 16) + (c << 8) + d))
+        touch temp_name
+        printf "%s\x04" "$4" > temp_name
+        openocd -f openocd/openocd.cfg \
+                -c "init 
+                    reset init 
+                    halt 
+                    stm32h7x mass_erase 1 
+                    flash write_image erase target/thumbv7em-none-eabihf/release/humpback-dds 
+                    flash filld 0x08100000 $ip 1 
+                    flash filld 0x08100020 $mac 1 
+                    flash fillw 0x08100040 $broker_ip 1 
+                    flash write_image temp_name 0x08100060 bin
+                    reset run 
+                    shutdown"
+        rm temp_name
+    '';
 
 in
-	stdenv.mkDerivation {
+    stdenv.mkDerivation {
-		name = "nix-shell";		
+        name = "Humpback-DDS";
-		buildInputs = with rustPlatform.rust; [
+        buildInputs = with rustPlatform.rust; [
-			(pkgs.python3.withPackages(ps: [ migen ]))
+            (pkgs.python3.withPackages(ps: [ migen ]))
-			pkgs.yosys
+            pkgs.yosys
-			pkgs.nextpnr
+            pkgs.nextpnr
-			pkgs.icestorm
+            pkgs.icestorm
-			pkgs.gdb
+            pkgs.gdb
-			pkgs.mosquitto
+            pkgs.mosquitto
-			openocd
+            openocd
-			rustc
+            rustc
-			cargo
+            cargo
-			itm
+            itm
-			runOpenOcd
+            runOpenOcdBlock
-			runOpenOcdBlock
+            openocdFlash
-			setGDBConfigFile
+            publishMqtt
-			openocdFlash
+            openOCDFlashCustomised
-			publishMqtt
+        ];
-		];
+    }
-	}

src/dds.rs

@@ -187,6 +187,9 @@ where
     }
 
     // Change external clock source (ref_clk)
+    // This will always provide a legitimate f_sys_clk by the following priority
+    // 1. Keep DDS clock tree untouched, record the new f_sys_clk
+    // 2. Use the default divided-by-2 clock tree, if PLL configuration becomes invalid
     pub fn set_ref_clk_frequency(&mut self, f_ref_clk: f64) -> Result<(), Error<E>> {
         // Override old reference clock frequency (ref_clk)
         self.f_ref_clk = f_ref_clk;
@@ -332,7 +335,7 @@ where
     pub fn set_configurations(&mut self, mask_pairs: &mut[(DDSCFRMask, u32)]) -> Result<(), Error<E>> {
         let mut data_array = self.get_all_configurations()?;
         for index in 0..mask_pairs.len() {
-            // Reject any attempt to rewrite LSB_FIRST and SBIO_INPUT_ONLY
+            // Reject any attempt to rewrite LSB_FIRST and SDIO_INPUT_ONLY
             if mask_pairs[index].0 == DDSCFRMask::LSB_FIRST || mask_pairs[index].0 == DDSCFRMask::SDIO_IN_ONLY {
                 continue;
             }
@@ -343,6 +346,9 @@ where
                 _ => panic!("Invalid DDSCFRMask!"),
             };
         }
+        // Deterministically maintain LSB_FIRST and SDIO_INPUT_ONLY
+        DDSCFRMask::LSB_FIRST.set_data_by_arg(&mut data_array[0], 0);
+        DDSCFRMask::SDIO_IN_ONLY.set_data_by_arg(&mut data_array[0], 1);
         self.set_all_configurations(data_array.clone())
     }
 
@@ -379,10 +385,38 @@ where
         ])
     }
 
+    /*
+     *  Getter function for single tone profiles
+     */
+    pub fn get_single_tone_profile(&mut self, profile: u8) -> Result<(f64, f64, f64), Error<E>> {
+
+        assert!(profile < 8);
+
+        let mut profile_content: [u8; 8] = [0; 8];
+        self.read_register(0x0E + profile, &mut profile_content)?;
+
+        // Convert ftw, pow and asf to f_out, phase and amplitude factor
+        let ftw: u64 = (profile_content[4] as u64) << 24 |
+                       (profile_content[5] as u64) << 16 |
+                       (profile_content[6] as u64) <<  8 |
+                       (profile_content[7] as u64);
+        let f_out: f64 = ((ftw as f64)/(((1_u64) << 32) as f64))*self.f_sys_clk;
+
+        let pow: u64 = (profile_content[2] as u64) <<  8 |
+                       (profile_content[3] as u64);
+        let phase: f64 = ((pow as f64)/(((1_u64) << 16) as f64))*360.0;
+
+        let asf: u64 = (profile_content[0] as u64) <<  8 |
+                       (profile_content[1] as u64);
+        let amplitude: f64 = (asf as f64)/(((1_u64) << 14) as f64);
+
+        Ok((f_out, phase, amplitude))
+    }
+
     /*
      *  Set frequency of a single tone profile
      *  Frequency: Must be non-negative
-     *    Keep other field unchanged in the register
+     *  Keep other field unchanged in the register
      */
     pub fn set_single_tone_profile_frequency(&mut self, profile: u8, f_out: f64) -> Result<(), Error<E>> {
 
@@ -408,7 +442,7 @@ where
     /*
      *  Set phase offset of a single tone profile
      *  Phase: Expressed in positive degree, i.e. [0.0, 360.0)
-     *    Keep other field unchanged in the register
+     *  Keep other field unchanged in the register
      */
     pub fn set_single_tone_profile_phase(&mut self, profile: u8, phase_offset: f64) -> Result<(), Error<E>> {
 
@@ -432,7 +466,7 @@ where
     /*
      *  Set amplitude offset of a single tone profile
      *  Amplitude: In a scale from 0 to 1, taking float
-     *    Keep other field unchanged in the register
+     *  Keep other field unchanged in the register
      */
     pub fn set_single_tone_profile_amplitude(&mut self, profile: u8, amp_scale_factor: f64) -> Result<(), Error<E>> {
 
@@ -831,7 +865,9 @@ macro_rules! impl_register_io {
                             }
                             self.spi.transfer(&mut arr)
                                     .map(|_| ())
-                                    .map_err(Error::SPI)
+                                    .map_err(Error::SPI)?;
+                            debug!("Write register: {:X}, Bytes: {:X?}", addr, bytes);
+                            Ok(())
                         },
                     )*
                     _ => panic!("Bad address for DDS writing.")
@@ -851,6 +887,7 @@ macro_rules! impl_register_io {
                                     for i in 0..$reg_byte_size {
                                         bytes[i] = ret[i+1];
                                     }
+                                    debug!("Read register: {:X}, Bytes: {:X?}", addr, bytes);
                                     Ok(bytes)
                                 },
                                 Err(e) => Err(e),

src/main.rs

@@ -18,7 +18,9 @@ use cortex_m;
 use cortex_m_rt::entry;
 use rtic::cyccnt::{Instant, U32Ext};
 
-use heapless::consts;
+use heapless::{ String, consts, consts::* };
+
+use core::convert::TryInto;
 
 #[macro_use]
 pub mod bitmask_macro;
@@ -110,6 +112,58 @@ fn main() -> ! {
     let gpiof = dp.GPIOF.split(ccdr.peripheral.GPIOF);
     let gpiog = dp.GPIOG.split(ccdr.peripheral.GPIOG);
 
+    // Acquire client/broker IP Address, client MAC address from flash memory
+    let ipv4_addr_cidr = unsafe {
+        let ipv4_bits = core::ptr::read(0x08100000 as *const u64);
+        net::wire::IpCidr::new(
+            net::wire::IpAddress::v4(
+                ((ipv4_bits >> 32) & 0xFF).try_into().unwrap(),
+                ((ipv4_bits >> 24) & 0xFF).try_into().unwrap(),
+                ((ipv4_bits >> 16) & 0xFF).try_into().unwrap(),
+                ((ipv4_bits >>  8) & 0xFF).try_into().unwrap()
+            ),
+            ((ipv4_bits >>  0) & 0xFF).try_into().unwrap()
+        )
+    };
+
+    let mac_addr = unsafe {
+        let mac_bits = core::ptr::read(0x08100020 as *const u64);
+        net::wire::EthernetAddress([
+            ((mac_bits >> 40) & 0xFF).try_into().unwrap(),
+            ((mac_bits >> 32) & 0xFF).try_into().unwrap(),
+            ((mac_bits >> 24) & 0xFF).try_into().unwrap(),
+            ((mac_bits >> 16) & 0xFF).try_into().unwrap(),
+            ((mac_bits >>  8) & 0xFF).try_into().unwrap(),
+            (mac_bits & 0xFF).try_into().unwrap(),
+        ])
+    };
+
+    let broker_ipv4_addr = unsafe {
+        let ipv4_bits = core::ptr::read(0x08100040 as *const u64);
+        Ipv4Addr::new(
+            ((ipv4_bits >> 24) & 0xFF).try_into().unwrap(),
+            ((ipv4_bits >> 16) & 0xFF).try_into().unwrap(),
+            ((ipv4_bits >>  8) & 0xFF).try_into().unwrap(),
+            ((ipv4_bits >>  0) & 0xFF).try_into().unwrap()
+        )
+    };
+
+    let device_name: String<U32> = unsafe {
+        let mut name = String::new();
+        let mut addr = 0x08100060;
+        loop {
+            let c = core::ptr::read(addr as *const u8);
+            if c == 4 {
+                break;
+            } else {
+                name.push(c as char).unwrap();
+                addr += 1;
+            }
+        }
+        name
+    };
+
+
     // Note: ITM doesn't work beyond this, due to a pin conflict between:
     // - FPGA_SPI: SCK  (af5)
     // - ST_LINK SWO    (af0)
@@ -153,7 +207,7 @@ fn main() -> ! {
     }
 
     // Configure ethernet
-    let mac_addr = net::wire::EthernetAddress([0xAC, 0x6F, 0x7A, 0xDE, 0xD6, 0xC8]);
+    // let mac_addr = net::wire::EthernetAddress([0xAC, 0x6F, 0x7A, 0xDE, 0xD6, 0xC8]);
     let (eth_dma, mut eth_mac) = unsafe {
         ethernet::new_unchecked(
             dp.ETHERNET_MAC,
@@ -168,7 +222,7 @@ fn main() -> ! {
 
     let store = unsafe { &mut NET_STORE };
 
-    store.ip_addrs[0] = net::wire::IpCidr::new(net::wire::IpAddress::v4(192, 168, 1, 200), 24);
+    store.ip_addrs[0] = ipv4_addr_cidr;
 
     let neighbor_cache = net::iface::NeighborCache::new(&mut store.neighbor_cache[..]);
 
@@ -218,10 +272,9 @@ fn main() -> ! {
     let mut urukul = Urukul::new(
         parts.spi1, parts.spi2, parts.spi3, parts.spi4, parts.spi5, parts.spi6, parts.spi7
     );
-
     urukul.reset().unwrap();
 
-    let mut mqtt_mux = MqttMux::new(urukul);
+    let mut mqtt_mux = MqttMux::new(urukul, device_name.as_str());
 
     // Time unit in ms
     let mut time: u32 = 0;
@@ -238,8 +291,8 @@ fn main() -> ! {
     let tcp_stack = NetworkStack::new(&mut net_interface, sockets);
 
     let mut client = MqttClient::<consts::U256, _>::new(
-        IpAddr::V4(Ipv4Addr::new(192, 168, 1, 125)),
+        IpAddr::V4(broker_ipv4_addr),
-        "Urukul",
+        device_name.as_str(),
         tcp_stack,
     )
     .unwrap();
@@ -276,18 +329,19 @@ fn main() -> ! {
             };
         
         // Process MQTT response messages about Urukul
-        match mqtt_mux.process_mqtt_egress().unwrap() {
+        for (topic, message) in mqtt_mux.process_mqtt_egress().unwrap() {
-            Some((topic, message)) => client.publish(
+            client.publish(
-                topic,
+                topic.as_str(),
                 message.as_bytes(),
                 QoS::AtMostOnce,
                 &[]
-            ).unwrap(),
+            ).unwrap();
-            None => {},
         }
         
         if connection && !has_subscribed && tick {
-            match client.subscribe("Urukul/Control/#", &[]) {
+            let mut str_builder: String<U128> = String::from(device_name.as_str());
+            str_builder.push_str("/Control/#").unwrap();
+            match client.subscribe(str_builder.as_str(), &[]) {
                 Ok(()) => has_subscribed = true,
                 Err(minimq::Error::NotReady) => {},
                 _e => {},

src/mqtt_mux.rs

@@ -6,8 +6,7 @@ use nom::character::complete::digit1;
 use nom::character::is_space;
 use nom::branch::{permutation, alt};
 use nom::number::complete::{float, double};
-use heapless::String;
+use heapless::{ Vec, String, consts::* };
-use heapless::consts::*;
 use ryu;
 use embedded_hal::blocking::spi::Transfer;
 use core::convert::TryInto;
@@ -36,7 +35,7 @@ pub enum MqttTopic {
 // Such that Urukul accepts the enum directly
 #[derive(Debug, Clone)]
 pub enum MqttCommand {
-    ProcessError,
+    ProcessError(&'static str),
     Reset,
     Switch(u8, bool),
     Attenuation(u8, f32),
@@ -52,19 +51,19 @@ pub enum MqttCommand {
     Profile(u8)
 }
 
-pub struct MqttMux<SPI> {
+pub struct MqttMux<'s, SPI> {
     urukul: Urukul<SPI>,
     yet_to_respond: Option<MqttCommand>,
-    str_builder: String<U128>,
+    name: &'s str,
     float_buffer: ryu::Buffer,
 }
 
-impl<SPI, E> MqttMux<SPI> where SPI: Transfer<u8, Error = E> {
+impl<'s, SPI, E> MqttMux<'s, SPI> where SPI: Transfer<u8, Error = E> {
-    pub fn new(urukul: Urukul<SPI>) -> Self {
+    pub fn new(urukul: Urukul<SPI>, name: &'s str) -> Self {
         MqttMux {
             urukul: urukul,
             yet_to_respond: None,
-            str_builder: String::new(),
+            name: name,
             float_buffer: ryu::Buffer::new(),
         }
     }
@@ -75,19 +74,19 @@ impl<SPI, E> MqttMux<SPI> where SPI: Transfer<u8, Error = E> {
         let topic = match self.parse_topic(topic) {
             Ok(t) => t,
             Err(_) => {
-                self.yet_to_respond = Some(MqttCommand::ProcessError);
+                self.yet_to_respond = Some(MqttCommand::ProcessError("Cannot prase MQTT topic"));
                 return;
             }
         };
         let command = match self.parse_message(topic, message) {
             Ok((_, cmd)) => cmd,
             Err(_) => {
-                self.yet_to_respond = Some(MqttCommand::ProcessError);
+                self.yet_to_respond = Some(MqttCommand::ProcessError("Cannot parse MQTT message"));
                 return;
             }
         };
         self.yet_to_respond = match self.execute(command.clone()) {
-            Err(_) => Some(MqttCommand::ProcessError),
+            Err(_) => Some(MqttCommand::ProcessError("Cannot execute MQTT command")),
             Ok(()) => Some(command)
         };
     }
@@ -95,43 +94,56 @@ impl<SPI, E> MqttMux<SPI> where SPI: Transfer<u8, Error = E> {
     // Be sure to call egress function after each ingress.
     // Otherwise, response will be lost if successive valid MQTT messages were captured
     // without calling egress in between
-    pub fn process_mqtt_egress(&mut self) -> Result<Option<(&str, String<U64>)>, Error<E>> {
+    pub fn process_mqtt_egress(&mut self) -> Result<Vec<(String<U128>, String<U64>), U4>, Error<E>> {
         // Remove previously executed command, and process it afterwards
         let prev_cmd = self.yet_to_respond.clone();
         self.yet_to_respond = None;
+        let mut vec = Vec::new();
 
         match prev_cmd {
             Some(cmd) => match cmd {
-                MqttCommand::ProcessError => Ok(
+                MqttCommand::ProcessError(e_str) => {
-                    Some((
+                    vec.push((
-                        "Urukul/Feedback/Error",
-                        String::from("Cannot parse the previous command.")
-                    ))
-                ),
-                MqttCommand::Reset => Ok(
-                    Some((
-                        "Urukul/Feedback/Reset",
                         {
-                            String::from(
+                            let mut topic_string = String::from(self.name);
-                                match self.urukul.test() {
+                            topic_string.push_str("/Feedback/Error")
-                                    Ok(0) => "Reset successful.",
+                                .map_err(|_| Error::StringOutOfSpace)?;
-                                    _ => "Reset error!",
+                            topic_string
-                                }
+                        },
-                            )
+                        String::from(e_str)
-                        }
+                    )).map_err(|_| Error::VectorOutOfSpace)?;
-                    ))
+                    Ok(vec)
-                ),
+                }
-                MqttCommand::Switch(ch, _) => Ok(
+
-                    Some((
+                MqttCommand::Reset => {
+                    vec.push((
                         {
-                            self.str_builder.clear();
+                            let mut topic_string = String::from(self.name);
-                            self.str_builder.push_str("Urukul/Feedback/Channel")
+                            topic_string.push_str("/Feedback/Reset")
                                 .map_err(|_| Error::StringOutOfSpace)?;
-                            self.str_builder.push(char::from_digit(ch.into(), 10).unwrap())
+                            topic_string
+                        },
+                        String::from(
+                            match self.urukul.test() {
+                                Ok(0) => "Reset successful.",
+                                _ => "Reset error!",
+                            }
+                        )
+                    )).map_err(|_| Error::VectorOutOfSpace)?;
+                    Ok(vec)
+                }
+
+                MqttCommand::Switch(ch, _) => {
+                    vec.push((
+                        {
+                            let mut topic_string = String::from(self.name);
+                            topic_string.push_str("/Feedback/Channel")
                                 .map_err(|_| Error::StringOutOfSpace)?;
-                            self.str_builder.push_str("/Switch")
+                            topic_string.push(char::from_digit(ch.into(), 10).unwrap())
                                 .map_err(|_| Error::StringOutOfSpace)?;
-                            self.str_builder.as_str()
+                            topic_string.push_str("/Switch")
+                                .map_err(|_| Error::StringOutOfSpace)?;
+                            topic_string
                         },
                         {
                             String::from(
@@ -142,19 +154,21 @@ impl<SPI, E> MqttMux<SPI> where SPI: Transfer<u8, Error = E> {
                                 }
                             )
                         }
-                    ))
+                    )).map_err(|_| Error::VectorOutOfSpace)?;
-                ),
+                    Ok(vec)
-                MqttCommand::Attenuation(ch, _) => Ok(
+                }
-                    Some((
+
+                MqttCommand::Attenuation(ch, _) => {
+                    vec.push((
                         {
-                            self.str_builder.clear();
+                            let mut topic_string = String::from(self.name);
-                            self.str_builder.push_str("Urukul/Feedback/Channel")
+                            topic_string.push_str("/Feedback/Channel")
                                 .map_err(|_| Error::StringOutOfSpace)?;
-                            self.str_builder.push(char::from_digit(ch.into(), 10).unwrap())
+                            topic_string.push(char::from_digit(ch.into(), 10).unwrap())
                                 .map_err(|_| Error::StringOutOfSpace)?;
-                            self.str_builder.push_str("/Attenuation")
+                            topic_string.push_str("/Attenuation")
                                 .map_err(|_| Error::StringOutOfSpace)?;
-                            self.str_builder.as_str()
+                            topic_string
                         },
                         {
                             String::from(
@@ -163,19 +177,55 @@ impl<SPI, E> MqttMux<SPI> where SPI: Transfer<u8, Error = E> {
                                 )
                             )
                         }
-                    ))
+                    )).map_err(|_| Error::VectorOutOfSpace)?;
-                ),
+                    Ok(vec)
-                MqttCommand::SystemClock(ch, _) => Ok(
+                }
-                    Some((
+
+                MqttCommand::Clock(_, _, _) => {
+                    vec.push(
+                        self.get_clock_source_message()?
+                    ).map_err(|_| Error::VectorOutOfSpace)?;
+                    vec.push(
+                        self.get_clock_frequency_message()?
+                    ).map_err(|_| Error::VectorOutOfSpace)?;
+                    vec.push(
+                        self.get_clock_division_message()?
+                    ).map_err(|_| Error::VectorOutOfSpace)?;
+                    Ok(vec)
+                }
+
+                MqttCommand::ClockSource(_) => {
+                    vec.push(
+                        self.get_clock_source_message()?
+                    ).map_err(|_| Error::VectorOutOfSpace)?;
+                    Ok(vec)
+                }
+
+                MqttCommand::ClockFrequency(_) => {
+                    vec.push(
+                        self.get_clock_frequency_message()?
+                    ).map_err(|_| Error::VectorOutOfSpace)?;
+                    Ok(vec)
+                }
+
+                MqttCommand::ClockDivision(_) => {
+                    vec.push(
+                        self.get_clock_division_message()?
+                    ).map_err(|_| Error::VectorOutOfSpace)?;
+                    Ok(vec)
+                }
+
+                MqttCommand::SystemClock(ch, _) => {
+                    vec.push((
                         {
-                            self.str_builder.clear();
+                            let mut topic_string = String::from(self.name);
-                            self.str_builder.push_str("Urukul/Feedback/Channel")
+                            topic_string.push_str("/Feedback/Channel")
                                 .map_err(|_| Error::StringOutOfSpace)?;
-                            self.str_builder.push(char::from_digit(ch.into(), 10).unwrap())
+                            topic_string.push(char::from_digit(ch.into(), 10).unwrap())
                                 .map_err(|_| Error::StringOutOfSpace)?;
-                            self.str_builder.push_str("/SystemClock")
+                            topic_string.push_str("/SystemClock")
                                 .map_err(|_| Error::StringOutOfSpace)?;
-                            self.str_builder.as_str()
+                            topic_string
                         },
                         {
                             let mut message_str = String::from(
@@ -187,11 +237,32 @@ impl<SPI, E> MqttMux<SPI> where SPI: Transfer<u8, Error = E> {
                                 .map_err(|_| Error::StringOutOfSpace)?;
                             message_str
                         }
-                    ))
+                    )).map_err(|_| Error::VectorOutOfSpace)?;
-                ),
+                    Ok(vec)
-                MqttCommand::Profile(_) => Ok(
+                }
-                    Some((
+
-                        "Urukul/Feedback/Profile",
+                MqttCommand::Singletone(ch, pr, _, _, _) |
+                MqttCommand::SingletoneFrequency(ch, pr, _) |
+                MqttCommand::SingletoneAmplitude(ch, pr, _) |
+                MqttCommand::SingletonePhase(ch, pr, _) => {
+                    let (f_out, phase, ampl) = self.urukul.get_channel_single_tone_profile(ch, pr)?;
+                    vec.push(self.get_single_tone_frequency_message(ch, f_out)?)
+                        .map_err(|_| Error::StringOutOfSpace)?;
+                    vec.push(self.get_single_tone_phase_message(ch, phase)?)
+                        .map_err(|_| Error::StringOutOfSpace)?;
+                    vec.push(self.get_single_tone_amplitude_message(ch, ampl)?)
+                        .map_err(|_| Error::StringOutOfSpace)?;
+                    Ok(vec)
+                }
+
+                MqttCommand::Profile(_) => {
+                    vec.push((
+                        {
+                            let mut topic_string = String::from(self.name);
+                            topic_string.push_str("/Feedback/Profile")
+                                .map_err(|_| Error::StringOutOfSpace)?;
+                            topic_string
+                        },
                         {
                             let mut message_str = String::new();
                             let prof = self.urukul.get_profile()?;
@@ -199,11 +270,11 @@ impl<SPI, E> MqttMux<SPI> where SPI: Transfer<u8, Error = E> {
                                 .map_err(|_| Error::StringOutOfSpace)?;
                             message_str
                         }
-                    ))
+                    )).map_err(|_| Error::VectorOutOfSpace)?;
-                ),
+                    Ok(vec)
-                _ => Ok(Some(("Urukul/Feedback/Unimplemented", String::from("test")))),
+                }
             },
-            None => Ok(None),
+            None => Ok(vec),
         }
     }
 
@@ -213,10 +284,20 @@ impl<SPI, E> MqttMux<SPI> where SPI: Transfer<u8, Error = E> {
         let mut channel :u8 = 0;
         let mut profile :u8 = 0;
 
-        // Verify that the topic must start with Urukul/Control/ or /Urukul/Control/
+        // Verify that the topic starts with <name>/Control/ or /<name>/Control/
-        let mut header = topic.strip_prefix("/Urukul/Control/")
+        let mut header = {
-                              .or_else(|| topic.strip_prefix("Urukul/Control/"))
+            let mut topic_builder_with_slash: String<U128> = String::from("/");
-                              .ok_or(Error::MqttCommandError)?;
+            topic_builder_with_slash.push_str(self.name)
+                .map_err(|_| Error::StringOutOfSpace)?;
+            topic_builder_with_slash.push_str("/Control/")
+                .map_err(|_| Error::StringOutOfSpace)?;
+            let topic_builder: &str = topic_builder_with_slash.as_str()
+                                                    .strip_prefix("/")
+                                                    .ok_or(Error::StringOutOfSpace)?;
+            topic.strip_prefix(topic_builder_with_slash.as_str())
+                .or_else(|| topic.strip_prefix(topic_builder))
+                .ok_or(Error::MqttCommandError)?
+        };
 
         loop {
             match header {
@@ -399,7 +480,7 @@ impl<SPI, E> MqttMux<SPI> where SPI: Transfer<u8, Error = E> {
 
     fn execute(&mut self, command: MqttCommand) -> Result<(), Error<E>> {
         match command {
-            MqttCommand::ProcessError => Ok(()),
+            MqttCommand::ProcessError(_) => Ok(()),
             MqttCommand::Reset => self.urukul.reset(),
             MqttCommand::Switch(ch, state) => self.urukul.set_channel_switch(ch.into(), state),
             MqttCommand::Attenuation(ch, ampl) => self.urukul.set_channel_attenuation(ch, ampl),
@@ -416,13 +497,130 @@ impl<SPI, E> MqttMux<SPI> where SPI: Transfer<u8, Error = E> {
         }
     }
 
-    pub fn get_switch_status_message(&mut self, channel: u8) -> Result<&str, Error<E>> {
+    fn get_clock_source_message(&mut self) -> Result<(String<U128>, String<U64>), Error<E>> {
-        self.urukul.get_channel_switch_status(channel.into()).map(
+        Ok((
-            |stat| if stat {
+            {
-                "on"
+                let mut topic_string = String::from(self.name);
-            } else {
+                topic_string.push_str("/Feedback/Clock/Source")
-                "off"
+                    .map_err(|_| Error::StringOutOfSpace)?;
-            })
+                topic_string
+            },
+            self.urukul.get_clock_source().map(
+                |src| match src {
+                    UrukulClockSource::OSC => String::from("OSC"),
+                    UrukulClockSource::MMCX => String::from("MMCX"),
+                    UrukulClockSource::SMA => String::from("SMA")
+                }
+            )?
+        ))
+    }
+
+    fn get_clock_frequency_message(&mut self) -> Result<(String<U128>, String<U64>), Error<E>> {        
+        Ok((
+            {
+                let mut topic_string = String::from(self.name);
+                topic_string.push_str("/Feedback/Clock/Frequency")
+                    .map_err(|_| Error::StringOutOfSpace)?;
+                topic_string
+            },
+            {
+                let mut freq_str = String::from(
+                    self.float_buffer.format_finite(
+                        self.urukul.get_clock_frequency()
+                    )
+                );
+                freq_str.push_str(" Hz").map_err(|_| Error::StringOutOfSpace)?;
+                freq_str
+            }
+        ))
+    }
+
+    fn get_clock_division_message(&mut self) -> Result<(String<U128>, String<U64>), Error<E>> {
+        Ok((
+            {
+                let mut topic_string = String::from(self.name);
+                topic_string.push_str("/Feedback/Clock/Division")
+                    .map_err(|_| Error::StringOutOfSpace)?;
+                topic_string
+            },
+            {
+                self.urukul.get_clock_division().map(
+                    |src| match src {
+                        1 => String::from("1"),
+                        2 => String::from("2"),
+                        4 => String::from("4"),
+                        _ => unreachable!()
+                    }
+                )?
+            }
+        ))
+    }
+
+    fn get_single_tone_frequency_message(&mut self, ch: u8, f_out: f64) -> Result<(String<U128>, String<U64>), Error<E>> {
+        Ok((
+            {
+                let mut topic_string = String::from(self.name);
+                topic_string.push_str("/Feedback/Channel")
+                    .map_err(|_| Error::StringOutOfSpace)?;
+                topic_string.push(char::from_digit(ch.into(), 10).unwrap())
+                    .map_err(|_| Error::StringOutOfSpace)?;
+                topic_string.push_str("/Singletone/Frequency")
+                    .map_err(|_| Error::StringOutOfSpace)?;
+                topic_string
+            },
+            {
+                let mut message_str = String::from(
+                    self.float_buffer.format_finite(f_out)
+                );
+                message_str.push_str(" Hz")
+                    .map_err(|_| Error::StringOutOfSpace)?;
+                message_str
+            }
+        ))
+    }
+
+    fn get_single_tone_amplitude_message(&mut self, ch: u8, ampl: f64) -> Result<(String<U128>, String<U64>), Error<E>> {
+        Ok((
+            {
+                let mut topic_string = String::from(self.name);
+                topic_string.push_str("/Feedback/Channel")
+                    .map_err(|_| Error::StringOutOfSpace)?;
+                topic_string.push(char::from_digit(ch.into(), 10).unwrap())
+                    .map_err(|_| Error::StringOutOfSpace)?;
+                topic_string.push_str("/Singletone/Amplitude")
+                    .map_err(|_| Error::StringOutOfSpace)?;
+                topic_string
+            },
+            {
+                let message_str = String::from(
+                    self.float_buffer.format_finite(ampl)
+                );
+                message_str
+            }
+        ))
+    }
+
+    fn get_single_tone_phase_message(&mut self, ch: u8, phase: f64) -> Result<(String<U128>, String<U64>), Error<E>> {
+        Ok((
+            {
+                let mut topic_string = String::from(self.name);
+                topic_string.push_str("/Feedback/Channel")
+                    .map_err(|_| Error::StringOutOfSpace)?;
+                topic_string.push(char::from_digit(ch.into(), 10).unwrap())
+                    .map_err(|_| Error::StringOutOfSpace)?;
+                topic_string.push_str("/Singletone/Phase")
+                    .map_err(|_| Error::StringOutOfSpace)?;
+                topic_string
+            },
+            {
+                let mut message_str = String::from(
+                    self.float_buffer.format_finite(phase)
+                );
+                message_str.push_str(" deg")
+                    .map_err(|_| Error::StringOutOfSpace)?;
+                message_str
+            }
+        ))
     }
 }
 

src/urukul.rs

@@ -173,6 +173,18 @@ where
         self.set_clock_division(division)
     }
 
+    pub fn get_clock_source(&mut self) -> Result<ClockSource, Error<E>> {
+        match (
+            self.config_register.get_configuration(CFGMask::CLK_SEL0),
+            self.config_register.get_configuration(CFGMask::CLK_SEL1)
+        ) {
+            (0, 0) => Ok(ClockSource::OSC),
+            (0, 1) => Ok(ClockSource::MMCX),
+            (1, _) => Ok(ClockSource::SMA),
+            _ => Err(Error::ConfigRegisterError)
+        }
+    }
+
     pub fn set_clock_source(&mut self, source: ClockSource) -> Result<(), Error<E>> {
         // Change clock source through configuration register
         match source {
@@ -190,6 +202,10 @@ where
         }.map(|_| ())
     }
 
+    pub fn get_clock_frequency(&mut self) -> f64 {
+        self.f_master_clk
+    }
+
     pub fn set_clock_frequency(&mut self, frequency: f64) -> Result<(), Error<E>> {
         // Update master clock frequency
         self.f_master_clk = frequency;
@@ -198,6 +214,15 @@ where
         self.set_dds_ref_clk()
     }
 
+    pub fn get_clock_division(&mut self) -> Result<u8, Error<E>> {
+        match self.config_register.get_configuration(CFGMask::DIV) {
+            0| 3 => Ok(4),
+            1 => Ok(1),
+            2 => Ok(2),
+            _ => Err(Error::ConfigRegisterError)
+        }
+    }
+
     pub fn set_clock_division(&mut self, division: u8) -> Result<(), Error<E>> {
         match division {
             1 => self.config_register.set_configurations(&mut [
@@ -266,6 +291,10 @@ where
         }
         self.dds[usize::from(channel)].set_single_tone_profile(profile, frequency, phase, amplitude)
     }
+    
+    pub fn get_channel_single_tone_profile(&mut self, channel: u8, profile: u8) -> Result<(f64, f64, f64), Error<E>> {
+        self.dds[usize::from(channel)].get_single_tone_profile(profile)
+    }
 
     pub fn set_channel_single_tone_profile_frequency(&mut self, channel: u8, profile: u8, frequency: f64)-> Result<(), Error<E>> {
         if channel >= 4 || profile >= 8 || frequency < 0.0 {