feat: add display UI with splash screen, dashboard, and RSSI sparkline

Implement full SSD1306 OLED display support:
- Splash screen on boot (1.5s) with project name, version, board
- Dashboard showing radio state, config, counters, RSSI/SNR
- RSSI history sparkline (64-sample ring buffer, 2px-wide bars)
- DisplayOn/DisplayOff host commands routed via dedicated channel
- Pure render functions against generic DrawTarget (no hardware coupling)
- Display on/off control bypasses radio task entirely

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

vendor/nrf52811-pac/src/uarte0/psel/cts.rs

@@ -0,0 +1,140 @@
+#[doc = "Register `CTS` reader"]
+pub struct R(crate::R<CTS_SPEC>);
+impl core::ops::Deref for R {
+    type Target = crate::R<CTS_SPEC>;
+    #[inline(always)]
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+impl From<crate::R<CTS_SPEC>> for R {
+    #[inline(always)]
+    fn from(reader: crate::R<CTS_SPEC>) -> Self {
+        R(reader)
+    }
+}
+#[doc = "Register `CTS` writer"]
+pub struct W(crate::W<CTS_SPEC>);
+impl core::ops::Deref for W {
+    type Target = crate::W<CTS_SPEC>;
+    #[inline(always)]
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+impl core::ops::DerefMut for W {
+    #[inline(always)]
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        &mut self.0
+    }
+}
+impl From<crate::W<CTS_SPEC>> for W {
+    #[inline(always)]
+    fn from(writer: crate::W<CTS_SPEC>) -> Self {
+        W(writer)
+    }
+}
+#[doc = "Field `PIN` reader - Pin number"]
+pub type PIN_R = crate::FieldReader<u8, u8>;
+#[doc = "Field `PIN` writer - Pin number"]
+pub type PIN_W<'a, const O: u8> = crate::FieldWriter<'a, u32, CTS_SPEC, u8, u8, 5, O>;
+#[doc = "Field `CONNECT` reader - Connection"]
+pub type CONNECT_R = crate::BitReader<CONNECT_A>;
+#[doc = "Connection\n\nValue on reset: 1"]
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub enum CONNECT_A {
+    #[doc = "1: Disconnect"]
+    DISCONNECTED = 1,
+    #[doc = "0: Connect"]
+    CONNECTED = 0,
+}
+impl From<CONNECT_A> for bool {
+    #[inline(always)]
+    fn from(variant: CONNECT_A) -> Self {
+        variant as u8 != 0
+    }
+}
+impl CONNECT_R {
+    #[doc = "Get enumerated values variant"]
+    #[inline(always)]
+    pub fn variant(&self) -> CONNECT_A {
+        match self.bits {
+            true => CONNECT_A::DISCONNECTED,
+            false => CONNECT_A::CONNECTED,
+        }
+    }
+    #[doc = "Checks if the value of the field is `DISCONNECTED`"]
+    #[inline(always)]
+    pub fn is_disconnected(&self) -> bool {
+        *self == CONNECT_A::DISCONNECTED
+    }
+    #[doc = "Checks if the value of the field is `CONNECTED`"]
+    #[inline(always)]
+    pub fn is_connected(&self) -> bool {
+        *self == CONNECT_A::CONNECTED
+    }
+}
+#[doc = "Field `CONNECT` writer - Connection"]
+pub type CONNECT_W<'a, const O: u8> = crate::BitWriter<'a, u32, CTS_SPEC, CONNECT_A, O>;
+impl<'a, const O: u8> CONNECT_W<'a, O> {
+    #[doc = "Disconnect"]
+    #[inline(always)]
+    pub fn disconnected(self) -> &'a mut W {
+        self.variant(CONNECT_A::DISCONNECTED)
+    }
+    #[doc = "Connect"]
+    #[inline(always)]
+    pub fn connected(self) -> &'a mut W {
+        self.variant(CONNECT_A::CONNECTED)
+    }
+}
+impl R {
+    #[doc = "Bits 0:4 - Pin number"]
+    #[inline(always)]
+    pub fn pin(&self) -> PIN_R {
+        PIN_R::new((self.bits & 0x1f) as u8)
+    }
+    #[doc = "Bit 31 - Connection"]
+    #[inline(always)]
+    pub fn connect(&self) -> CONNECT_R {
+        CONNECT_R::new(((self.bits >> 31) & 1) != 0)
+    }
+}
+impl W {
+    #[doc = "Bits 0:4 - Pin number"]
+    #[inline(always)]
+    pub fn pin(&mut self) -> PIN_W<0> {
+        PIN_W::new(self)
+    }
+    #[doc = "Bit 31 - Connection"]
+    #[inline(always)]
+    pub fn connect(&mut self) -> CONNECT_W<31> {
+        CONNECT_W::new(self)
+    }
+    #[doc = "Writes raw bits to the register."]
+    #[inline(always)]
+    pub unsafe fn bits(&mut self, bits: u32) -> &mut Self {
+        self.0.bits(bits);
+        self
+    }
+}
+#[doc = "Pin select for CTS signal\n\nThis register you can [`read`](crate::generic::Reg::read), [`write_with_zero`](crate::generic::Reg::write_with_zero), [`reset`](crate::generic::Reg::reset), [`write`](crate::generic::Reg::write), [`modify`](crate::generic::Reg::modify). See [API](https://docs.rs/svd2rust/#read--modify--write-api).\n\nFor information about available fields see [cts](index.html) module"]
+pub struct CTS_SPEC;
+impl crate::RegisterSpec for CTS_SPEC {
+    type Ux = u32;
+}
+#[doc = "`read()` method returns [cts::R](R) reader structure"]
+impl crate::Readable for CTS_SPEC {
+    type Reader = R;
+}
+#[doc = "`write(|w| ..)` method takes [cts::W](W) writer structure"]
+impl crate::Writable for CTS_SPEC {
+    type Writer = W;
+}
+#[doc = "`reset()` method sets CTS to value 0xffff_ffff"]
+impl crate::Resettable for CTS_SPEC {
+    #[inline(always)]
+    fn reset_value() -> Self::Ux {
+        0xffff_ffff
+    }
+}

vendor/nrf52811-pac/src/uarte0/psel/rts.rs

@@ -0,0 +1,140 @@
+#[doc = "Register `RTS` reader"]
+pub struct R(crate::R<RTS_SPEC>);
+impl core::ops::Deref for R {
+    type Target = crate::R<RTS_SPEC>;
+    #[inline(always)]
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+impl From<crate::R<RTS_SPEC>> for R {
+    #[inline(always)]
+    fn from(reader: crate::R<RTS_SPEC>) -> Self {
+        R(reader)
+    }
+}
+#[doc = "Register `RTS` writer"]
+pub struct W(crate::W<RTS_SPEC>);
+impl core::ops::Deref for W {
+    type Target = crate::W<RTS_SPEC>;
+    #[inline(always)]
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+impl core::ops::DerefMut for W {
+    #[inline(always)]
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        &mut self.0
+    }
+}
+impl From<crate::W<RTS_SPEC>> for W {
+    #[inline(always)]
+    fn from(writer: crate::W<RTS_SPEC>) -> Self {
+        W(writer)
+    }
+}
+#[doc = "Field `PIN` reader - Pin number"]
+pub type PIN_R = crate::FieldReader<u8, u8>;
+#[doc = "Field `PIN` writer - Pin number"]
+pub type PIN_W<'a, const O: u8> = crate::FieldWriter<'a, u32, RTS_SPEC, u8, u8, 5, O>;
+#[doc = "Field `CONNECT` reader - Connection"]
+pub type CONNECT_R = crate::BitReader<CONNECT_A>;
+#[doc = "Connection\n\nValue on reset: 1"]
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub enum CONNECT_A {
+    #[doc = "1: Disconnect"]
+    DISCONNECTED = 1,
+    #[doc = "0: Connect"]
+    CONNECTED = 0,
+}
+impl From<CONNECT_A> for bool {
+    #[inline(always)]
+    fn from(variant: CONNECT_A) -> Self {
+        variant as u8 != 0
+    }
+}
+impl CONNECT_R {
+    #[doc = "Get enumerated values variant"]
+    #[inline(always)]
+    pub fn variant(&self) -> CONNECT_A {
+        match self.bits {
+            true => CONNECT_A::DISCONNECTED,
+            false => CONNECT_A::CONNECTED,
+        }
+    }
+    #[doc = "Checks if the value of the field is `DISCONNECTED`"]
+    #[inline(always)]
+    pub fn is_disconnected(&self) -> bool {
+        *self == CONNECT_A::DISCONNECTED
+    }
+    #[doc = "Checks if the value of the field is `CONNECTED`"]
+    #[inline(always)]
+    pub fn is_connected(&self) -> bool {
+        *self == CONNECT_A::CONNECTED
+    }
+}
+#[doc = "Field `CONNECT` writer - Connection"]
+pub type CONNECT_W<'a, const O: u8> = crate::BitWriter<'a, u32, RTS_SPEC, CONNECT_A, O>;
+impl<'a, const O: u8> CONNECT_W<'a, O> {
+    #[doc = "Disconnect"]
+    #[inline(always)]
+    pub fn disconnected(self) -> &'a mut W {
+        self.variant(CONNECT_A::DISCONNECTED)
+    }
+    #[doc = "Connect"]
+    #[inline(always)]
+    pub fn connected(self) -> &'a mut W {
+        self.variant(CONNECT_A::CONNECTED)
+    }
+}
+impl R {
+    #[doc = "Bits 0:4 - Pin number"]
+    #[inline(always)]
+    pub fn pin(&self) -> PIN_R {
+        PIN_R::new((self.bits & 0x1f) as u8)
+    }
+    #[doc = "Bit 31 - Connection"]
+    #[inline(always)]
+    pub fn connect(&self) -> CONNECT_R {
+        CONNECT_R::new(((self.bits >> 31) & 1) != 0)
+    }
+}
+impl W {
+    #[doc = "Bits 0:4 - Pin number"]
+    #[inline(always)]
+    pub fn pin(&mut self) -> PIN_W<0> {
+        PIN_W::new(self)
+    }
+    #[doc = "Bit 31 - Connection"]
+    #[inline(always)]
+    pub fn connect(&mut self) -> CONNECT_W<31> {
+        CONNECT_W::new(self)
+    }
+    #[doc = "Writes raw bits to the register."]
+    #[inline(always)]
+    pub unsafe fn bits(&mut self, bits: u32) -> &mut Self {
+        self.0.bits(bits);
+        self
+    }
+}
+#[doc = "Pin select for RTS signal\n\nThis register you can [`read`](crate::generic::Reg::read), [`write_with_zero`](crate::generic::Reg::write_with_zero), [`reset`](crate::generic::Reg::reset), [`write`](crate::generic::Reg::write), [`modify`](crate::generic::Reg::modify). See [API](https://docs.rs/svd2rust/#read--modify--write-api).\n\nFor information about available fields see [rts](index.html) module"]
+pub struct RTS_SPEC;
+impl crate::RegisterSpec for RTS_SPEC {
+    type Ux = u32;
+}
+#[doc = "`read()` method returns [rts::R](R) reader structure"]
+impl crate::Readable for RTS_SPEC {
+    type Reader = R;
+}
+#[doc = "`write(|w| ..)` method takes [rts::W](W) writer structure"]
+impl crate::Writable for RTS_SPEC {
+    type Writer = W;
+}
+#[doc = "`reset()` method sets RTS to value 0xffff_ffff"]
+impl crate::Resettable for RTS_SPEC {
+    #[inline(always)]
+    fn reset_value() -> Self::Ux {
+        0xffff_ffff
+    }
+}

vendor/nrf52811-pac/src/uarte0/psel/rxd.rs

@@ -0,0 +1,140 @@
+#[doc = "Register `RXD` reader"]
+pub struct R(crate::R<RXD_SPEC>);
+impl core::ops::Deref for R {
+    type Target = crate::R<RXD_SPEC>;
+    #[inline(always)]
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+impl From<crate::R<RXD_SPEC>> for R {
+    #[inline(always)]
+    fn from(reader: crate::R<RXD_SPEC>) -> Self {
+        R(reader)
+    }
+}
+#[doc = "Register `RXD` writer"]
+pub struct W(crate::W<RXD_SPEC>);
+impl core::ops::Deref for W {
+    type Target = crate::W<RXD_SPEC>;
+    #[inline(always)]
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+impl core::ops::DerefMut for W {
+    #[inline(always)]
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        &mut self.0
+    }
+}
+impl From<crate::W<RXD_SPEC>> for W {
+    #[inline(always)]
+    fn from(writer: crate::W<RXD_SPEC>) -> Self {
+        W(writer)
+    }
+}
+#[doc = "Field `PIN` reader - Pin number"]
+pub type PIN_R = crate::FieldReader<u8, u8>;
+#[doc = "Field `PIN` writer - Pin number"]
+pub type PIN_W<'a, const O: u8> = crate::FieldWriter<'a, u32, RXD_SPEC, u8, u8, 5, O>;
+#[doc = "Field `CONNECT` reader - Connection"]
+pub type CONNECT_R = crate::BitReader<CONNECT_A>;
+#[doc = "Connection\n\nValue on reset: 1"]
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub enum CONNECT_A {
+    #[doc = "1: Disconnect"]
+    DISCONNECTED = 1,
+    #[doc = "0: Connect"]
+    CONNECTED = 0,
+}
+impl From<CONNECT_A> for bool {
+    #[inline(always)]
+    fn from(variant: CONNECT_A) -> Self {
+        variant as u8 != 0
+    }
+}
+impl CONNECT_R {
+    #[doc = "Get enumerated values variant"]
+    #[inline(always)]
+    pub fn variant(&self) -> CONNECT_A {
+        match self.bits {
+            true => CONNECT_A::DISCONNECTED,
+            false => CONNECT_A::CONNECTED,
+        }
+    }
+    #[doc = "Checks if the value of the field is `DISCONNECTED`"]
+    #[inline(always)]
+    pub fn is_disconnected(&self) -> bool {
+        *self == CONNECT_A::DISCONNECTED
+    }
+    #[doc = "Checks if the value of the field is `CONNECTED`"]
+    #[inline(always)]
+    pub fn is_connected(&self) -> bool {
+        *self == CONNECT_A::CONNECTED
+    }
+}
+#[doc = "Field `CONNECT` writer - Connection"]
+pub type CONNECT_W<'a, const O: u8> = crate::BitWriter<'a, u32, RXD_SPEC, CONNECT_A, O>;
+impl<'a, const O: u8> CONNECT_W<'a, O> {
+    #[doc = "Disconnect"]
+    #[inline(always)]
+    pub fn disconnected(self) -> &'a mut W {
+        self.variant(CONNECT_A::DISCONNECTED)
+    }
+    #[doc = "Connect"]
+    #[inline(always)]
+    pub fn connected(self) -> &'a mut W {
+        self.variant(CONNECT_A::CONNECTED)
+    }
+}
+impl R {
+    #[doc = "Bits 0:4 - Pin number"]
+    #[inline(always)]
+    pub fn pin(&self) -> PIN_R {
+        PIN_R::new((self.bits & 0x1f) as u8)
+    }
+    #[doc = "Bit 31 - Connection"]
+    #[inline(always)]
+    pub fn connect(&self) -> CONNECT_R {
+        CONNECT_R::new(((self.bits >> 31) & 1) != 0)
+    }
+}
+impl W {
+    #[doc = "Bits 0:4 - Pin number"]
+    #[inline(always)]
+    pub fn pin(&mut self) -> PIN_W<0> {
+        PIN_W::new(self)
+    }
+    #[doc = "Bit 31 - Connection"]
+    #[inline(always)]
+    pub fn connect(&mut self) -> CONNECT_W<31> {
+        CONNECT_W::new(self)
+    }
+    #[doc = "Writes raw bits to the register."]
+    #[inline(always)]
+    pub unsafe fn bits(&mut self, bits: u32) -> &mut Self {
+        self.0.bits(bits);
+        self
+    }
+}
+#[doc = "Pin select for RXD signal\n\nThis register you can [`read`](crate::generic::Reg::read), [`write_with_zero`](crate::generic::Reg::write_with_zero), [`reset`](crate::generic::Reg::reset), [`write`](crate::generic::Reg::write), [`modify`](crate::generic::Reg::modify). See [API](https://docs.rs/svd2rust/#read--modify--write-api).\n\nFor information about available fields see [rxd](index.html) module"]
+pub struct RXD_SPEC;
+impl crate::RegisterSpec for RXD_SPEC {
+    type Ux = u32;
+}
+#[doc = "`read()` method returns [rxd::R](R) reader structure"]
+impl crate::Readable for RXD_SPEC {
+    type Reader = R;
+}
+#[doc = "`write(|w| ..)` method takes [rxd::W](W) writer structure"]
+impl crate::Writable for RXD_SPEC {
+    type Writer = W;
+}
+#[doc = "`reset()` method sets RXD to value 0xffff_ffff"]
+impl crate::Resettable for RXD_SPEC {
+    #[inline(always)]
+    fn reset_value() -> Self::Ux {
+        0xffff_ffff
+    }
+}

vendor/nrf52811-pac/src/uarte0/psel/txd.rs

@@ -0,0 +1,140 @@
+#[doc = "Register `TXD` reader"]
+pub struct R(crate::R<TXD_SPEC>);
+impl core::ops::Deref for R {
+    type Target = crate::R<TXD_SPEC>;
+    #[inline(always)]
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+impl From<crate::R<TXD_SPEC>> for R {
+    #[inline(always)]
+    fn from(reader: crate::R<TXD_SPEC>) -> Self {
+        R(reader)
+    }
+}
+#[doc = "Register `TXD` writer"]
+pub struct W(crate::W<TXD_SPEC>);
+impl core::ops::Deref for W {
+    type Target = crate::W<TXD_SPEC>;
+    #[inline(always)]
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+impl core::ops::DerefMut for W {
+    #[inline(always)]
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        &mut self.0
+    }
+}
+impl From<crate::W<TXD_SPEC>> for W {
+    #[inline(always)]
+    fn from(writer: crate::W<TXD_SPEC>) -> Self {
+        W(writer)
+    }
+}
+#[doc = "Field `PIN` reader - Pin number"]
+pub type PIN_R = crate::FieldReader<u8, u8>;
+#[doc = "Field `PIN` writer - Pin number"]
+pub type PIN_W<'a, const O: u8> = crate::FieldWriter<'a, u32, TXD_SPEC, u8, u8, 5, O>;
+#[doc = "Field `CONNECT` reader - Connection"]
+pub type CONNECT_R = crate::BitReader<CONNECT_A>;
+#[doc = "Connection\n\nValue on reset: 1"]
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub enum CONNECT_A {
+    #[doc = "1: Disconnect"]
+    DISCONNECTED = 1,
+    #[doc = "0: Connect"]
+    CONNECTED = 0,
+}
+impl From<CONNECT_A> for bool {
+    #[inline(always)]
+    fn from(variant: CONNECT_A) -> Self {
+        variant as u8 != 0
+    }
+}
+impl CONNECT_R {
+    #[doc = "Get enumerated values variant"]
+    #[inline(always)]
+    pub fn variant(&self) -> CONNECT_A {
+        match self.bits {
+            true => CONNECT_A::DISCONNECTED,
+            false => CONNECT_A::CONNECTED,
+        }
+    }
+    #[doc = "Checks if the value of the field is `DISCONNECTED`"]
+    #[inline(always)]
+    pub fn is_disconnected(&self) -> bool {
+        *self == CONNECT_A::DISCONNECTED
+    }
+    #[doc = "Checks if the value of the field is `CONNECTED`"]
+    #[inline(always)]
+    pub fn is_connected(&self) -> bool {
+        *self == CONNECT_A::CONNECTED
+    }
+}
+#[doc = "Field `CONNECT` writer - Connection"]
+pub type CONNECT_W<'a, const O: u8> = crate::BitWriter<'a, u32, TXD_SPEC, CONNECT_A, O>;
+impl<'a, const O: u8> CONNECT_W<'a, O> {
+    #[doc = "Disconnect"]
+    #[inline(always)]
+    pub fn disconnected(self) -> &'a mut W {
+        self.variant(CONNECT_A::DISCONNECTED)
+    }
+    #[doc = "Connect"]
+    #[inline(always)]
+    pub fn connected(self) -> &'a mut W {
+        self.variant(CONNECT_A::CONNECTED)
+    }
+}
+impl R {
+    #[doc = "Bits 0:4 - Pin number"]
+    #[inline(always)]
+    pub fn pin(&self) -> PIN_R {
+        PIN_R::new((self.bits & 0x1f) as u8)
+    }
+    #[doc = "Bit 31 - Connection"]
+    #[inline(always)]
+    pub fn connect(&self) -> CONNECT_R {
+        CONNECT_R::new(((self.bits >> 31) & 1) != 0)
+    }
+}
+impl W {
+    #[doc = "Bits 0:4 - Pin number"]
+    #[inline(always)]
+    pub fn pin(&mut self) -> PIN_W<0> {
+        PIN_W::new(self)
+    }
+    #[doc = "Bit 31 - Connection"]
+    #[inline(always)]
+    pub fn connect(&mut self) -> CONNECT_W<31> {
+        CONNECT_W::new(self)
+    }
+    #[doc = "Writes raw bits to the register."]
+    #[inline(always)]
+    pub unsafe fn bits(&mut self, bits: u32) -> &mut Self {
+        self.0.bits(bits);
+        self
+    }
+}
+#[doc = "Pin select for TXD signal\n\nThis register you can [`read`](crate::generic::Reg::read), [`write_with_zero`](crate::generic::Reg::write_with_zero), [`reset`](crate::generic::Reg::reset), [`write`](crate::generic::Reg::write), [`modify`](crate::generic::Reg::modify). See [API](https://docs.rs/svd2rust/#read--modify--write-api).\n\nFor information about available fields see [txd](index.html) module"]
+pub struct TXD_SPEC;
+impl crate::RegisterSpec for TXD_SPEC {
+    type Ux = u32;
+}
+#[doc = "`read()` method returns [txd::R](R) reader structure"]
+impl crate::Readable for TXD_SPEC {
+    type Reader = R;
+}
+#[doc = "`write(|w| ..)` method takes [txd::W](W) writer structure"]
+impl crate::Writable for TXD_SPEC {
+    type Writer = W;
+}
+#[doc = "`reset()` method sets TXD to value 0xffff_ffff"]
+impl crate::Resettable for TXD_SPEC {
+    #[inline(always)]
+    fn reset_value() -> Self::Ux {
+        0xffff_ffff
+    }
+}