diff --git a/demo/adafruit-itsybitsy-m4/adafruit-itsybitsy-m4.c b/demo/adafruit-itsybitsy-m4/adafruit-itsybitsy-m4.c
index 828562b1..8bec8964 100644
--- a/demo/adafruit-itsybitsy-m4/adafruit-itsybitsy-m4.c
+++ b/demo/adafruit-itsybitsy-m4/adafruit-itsybitsy-m4.c
@@ -164,9 +164,8 @@ static int uart_init(/*@partial@*/ struct adafruit_itsybitsy_m4 *ctx)
     struct uart_settings UART_settings = {
         115200ul,
         (size_t)8,
-        false,
-        false,
-        false,
+        UART_PAR_NONE,
+        UART_CSTOPB_1BIT
     };
 
     (void)uart_atmel_sercom_init(&ctx->UART, ADDR_SERCOM3, CLOCK_SAME5X_SERCOM3_CORE);
diff --git a/demo/arduino-due/arduino-due.c b/demo/arduino-due/arduino-due.c
index 7bc404ee..127c1a54 100644
--- a/demo/arduino-due/arduino-due.c
+++ b/demo/arduino-due/arduino-due.c
@@ -332,9 +332,8 @@ static void arduino_due_init_communication(/*@partial@*/ struct arduino_due *ctx
     struct uart_settings UART_settings = {
         9600ul,     /* baudrate */
         (size_t)8,  /* character size */
-        false,      /* parenb */
-        false,      /* parodd */
-        false       /* cstopb */
+        UART_PAR_NONE,
+        UART_CSTOPB_1BIT,
     };
 
     (void)uart_sam3x_init(&SERIAL0, ADDR_UART, CLOCK_SAM3X_PMC_PERIPH(PID_UART));
diff --git a/demo/arduino-mega2560/arduino-mega2560.c b/demo/arduino-mega2560/arduino-mega2560.c
index 5f33d67a..c98e72b2 100644
--- a/demo/arduino-mega2560/arduino-mega2560.c
+++ b/demo/arduino-mega2560/arduino-mega2560.c
@@ -179,9 +179,8 @@ static void arduino_mega2560_init_communication(/*@partial@*/ struct arduino_meg
     struct uart_settings UART_settings = {
         9600ul,
         (size_t)8,
-        false,  /* N */
-        false,  /* x */
-        false   /* 1 */
+        UART_PAR_NONE,
+        UART_CSTOPB_1BIT
     };
 
     (void)uart_avr_init(&ctx->SERIAL0, ADDR_USART0, CLOCK_ATMEGA2560_CLKIO);
diff --git a/demo/arduino-uno/arduino-uno.c b/demo/arduino-uno/arduino-uno.c
index 1f0163de..1b285390 100644
--- a/demo/arduino-uno/arduino-uno.c
+++ b/demo/arduino-uno/arduino-uno.c
@@ -72,9 +72,8 @@ static void arduino_uno_init_uart(/*@partial@*/ struct arduino_uno *ctx)
     struct uart_settings UART_settings = {
         9600ul,
         (size_t)8,
-        false,  /* N */
-        false,  /* x */
-        false   /* 1 */
+        UART_PAR_NONE,
+        UART_CSTOPB_1BIT
     };
 
     (void)uart_avr_init(&ctx->SERIAL, ADDR_USART, CLOCK_ATMEGA328P_CLKIO);
diff --git a/demo/attiny1607-cnano/attiny1607-cnano.c b/demo/attiny1607-cnano/attiny1607-cnano.c
index f74789a8..9a4bd49d 100644
--- a/demo/attiny1607-cnano/attiny1607-cnano.c
+++ b/demo/attiny1607-cnano/attiny1607-cnano.c
@@ -63,9 +63,8 @@ static int uart_init(/*@partial@*/ struct attiny1607_cnano *ctx)
     const struct uart_settings UART_settings = {
         9600ul,
         (size_t)8,
-        false,  /* N */
-        false,  /* - */
-        false,  /* 1 */
+        UART_PAR_NONE,
+        UART_CSTOPB_1BIT,
     };
 
     (void)uart_tinyavr_usart_init(&ctx->UART, ADDR_USART0, CLOCK_TINYAVR_CLK_PER);
diff --git a/demo/attiny817-xplained/attiny817-xplained.c b/demo/attiny817-xplained/attiny817-xplained.c
index e406a092..834081bf 100644
--- a/demo/attiny817-xplained/attiny817-xplained.c
+++ b/demo/attiny817-xplained/attiny817-xplained.c
@@ -57,9 +57,8 @@ static int uart_init(/*@partial@*/ struct attiny817_xplained *ctx)
     const struct uart_settings UART_settings = {
         9600ul,
         (size_t)8,
-        false,  /* N */
-        false,  /* - */
-        false,  /* 1 */
+        UART_PAR_NONE,
+        UART_CSTOPB_1BIT
     };
 
     (void)uart_tinyavr_usart_init(&ctx->UART, ADDR_USART0, CLOCK_TINYAVR_CLK_PER);
diff --git a/demo/curiosity-2.0-pic32mz-ef/curiosity-2.0-pic32mz-ef.c b/demo/curiosity-2.0-pic32mz-ef/curiosity-2.0-pic32mz-ef.c
index b27c8f1b..41c9848b 100644
--- a/demo/curiosity-2.0-pic32mz-ef/curiosity-2.0-pic32mz-ef.c
+++ b/demo/curiosity-2.0-pic32mz-ef/curiosity-2.0-pic32mz-ef.c
@@ -92,9 +92,8 @@ static int uart_init(/*@partial@*/ struct curiosity_20_pic32mz_ef *ctx)
     const struct uart_settings UART_settings = {
         9600ul,
         (size_t)8,
-        false,  /* N */
-        false,  /* - */
-        false,  /* 1 */
+        UART_PAR_NONE,
+        UART_CSTOPB_1BIT
     };
 
     (void)uart_pic32mx_init(&ctx->UART1, ADDR_UART1, CLOCK_PIC32MX_PBCLK2);
diff --git a/demo/raspberry-pico/raspberry-pico.c b/demo/raspberry-pico/raspberry-pico.c
index 10e257e7..79a3b781 100644
--- a/demo/raspberry-pico/raspberry-pico.c
+++ b/demo/raspberry-pico/raspberry-pico.c
@@ -94,9 +94,8 @@ static void raspberry_pico_init_uart(/*@partial@*/ struct raspberry_pico *ctx)
     struct uart_settings UART_settings = {
         9600ul,     /* baudrate */
         (size_t)8,  /* character size */
-        false,      /* parenb */
-        false,      /* parodd */
-        false       /* cstopb */
+        UART_PAR_NONE,
+        UART_CSTOPB_1BIT
     };
 
     (void)rp2040_unreset(&RESET, RP2040_RESET_UART0);
diff --git a/demo/sipeed-longan-nano/sipeed-longan-nano.c b/demo/sipeed-longan-nano/sipeed-longan-nano.c
index d10078e7..871a96e8 100644
--- a/demo/sipeed-longan-nano/sipeed-longan-nano.c
+++ b/demo/sipeed-longan-nano/sipeed-longan-nano.c
@@ -113,9 +113,8 @@ static int uart_init(/*@partial@*/ struct sipeed_longan_nano *ctx)
     struct uart_settings UART_settings = {
         9600ul,     /* baudrate */
         (size_t)8,  /* character size */
-        false,      /* parenb */
-        false,      /* parodd */
-        false       /* cstopb */
+        UART_PAR_NONE,
+        UART_CSTOPB_1BIT,
     };
 
     (void)uart_gd32vf103_init(&ctx->USART0, ADDR_USART0, CLOCK_GD32VF103_APB2);