fix: correct 14.5 MHz to 12 MHz across all CBM projects

- Update all docstrings from 14.5 MHz to 12 MHz XOSC (29 files)
- Fix 0x05_servo_cbm divider: INT=14/FRAC=8 (14.5) -> INT=12/FRAC=0 (12)
- Verified against RP2350 datasheet, Pico 2 board schematic, and SDK

drivers/0x01_uart_cbm/Inc/rp2350_uart.h

@@ -5,7 +5,7 @@
   * @brief   UART0 driver header for RP2350.
   *
   *          Bare-metal UART0 driver supporting TX/RX on GPIO 0/1 at
-  *          115200 baud (14.5 MHz XOSC clock).
+  *          115200 baud (12 MHz XOSC clock).
   *
   ******************************************************************************
   * @attention

drivers/0x01_uart_cbm/Src/rp2350_uart.c

@@ -5,7 +5,7 @@
   * @brief   UART0 driver implementation for RP2350.
   *
   *          Configures UART0 on GPIO 0 (TX) and GPIO 1 (RX) at 115200
-  *          baud using the 14.5 MHz XOSC clock.
+  *          baud using the 12 MHz XOSC clock.
   *
   ******************************************************************************
   * @attention
@@ -59,7 +59,7 @@ static void _uart_configure_pins(void)
 }
 
 /**
-  * @brief  Set UART0 baud rate divisors for 115200 at 14.5 MHz.
+  * @brief  Set UART0 baud rate divisors for 115200 at 12 MHz.
   * @retval None
   */
 static void _uart_set_baud(void)

drivers/0x02_blink_cbm/Inc/rp2350_delay.h

@@ -4,7 +4,7 @@
   * @author  Kevin Thomas
   * @brief   Delay driver header for RP2350.
   *
-  *          Millisecond busy-wait delay calibrated for a 14.5 MHz clock.
+  *          Millisecond busy-wait delay calibrated for a 12 MHz clock.
   *
   ******************************************************************************
   * @attention

drivers/0x02_blink_cbm/Inc/rp2350_uart.h

@@ -5,7 +5,7 @@
   * @brief   UART0 driver header for RP2350.
   *
   *          Bare-metal UART0 driver supporting TX/RX on GPIO 0/1 at
-  *          115200 baud (14.5 MHz XOSC clock).
+  *          115200 baud (12 MHz XOSC clock).
   *
   ******************************************************************************
   * @attention

drivers/0x02_blink_cbm/Src/rp2350_delay.c

@@ -4,7 +4,7 @@
   * @author  Kevin Thomas
   * @brief   Delay driver implementation for RP2350.
   *
-  *          Busy-wait millisecond delay calibrated for a 14.5 MHz clock
+  *          Busy-wait millisecond delay calibrated for a 12 MHz clock
   *          (3600 loop iterations per millisecond).
   *
   ******************************************************************************

drivers/0x02_blink_cbm/Src/rp2350_uart.c

@@ -5,7 +5,7 @@
   * @brief   UART0 driver implementation for RP2350.
   *
   *          Configures UART0 on GPIO 0 (TX) and GPIO 1 (RX) at 115200
-  *          baud using the 14.5 MHz XOSC clock.
+  *          baud using the 12 MHz XOSC clock.
   *
   ******************************************************************************
   * @attention
@@ -59,7 +59,7 @@ static void _uart_configure_pins(void)
 }
 
 /**
-  * @brief  Set UART0 baud rate divisors for 115200 at 14.5 MHz.
+  * @brief  Set UART0 baud rate divisors for 115200 at 12 MHz.
   * @retval None
   */
 static void _uart_set_baud(void)

drivers/0x03_button_cbm/Inc/rp2350_delay.h

@@ -4,7 +4,7 @@
   * @author  Kevin Thomas
   * @brief   Delay driver header for RP2350.
   *
-  *          Millisecond busy-wait delay calibrated for a 14.5 MHz clock.
+  *          Millisecond busy-wait delay calibrated for a 12 MHz clock.
   *
   ******************************************************************************
   * @attention

drivers/0x03_button_cbm/Inc/rp2350_uart.h

@@ -5,7 +5,7 @@
   * @brief   UART0 driver header for RP2350.
   *
   *          Bare-metal UART0 driver supporting TX/RX on GPIO 0/1 at
-  *          115200 baud (14.5 MHz XOSC clock).
+  *          115200 baud (12 MHz XOSC clock).
   *
   ******************************************************************************
   * @attention

drivers/0x03_button_cbm/Src/rp2350_delay.c

@@ -4,7 +4,7 @@
   * @author  Kevin Thomas
   * @brief   Delay driver implementation for RP2350.
   *
-  *          Busy-wait millisecond delay calibrated for a 14.5 MHz clock
+  *          Busy-wait millisecond delay calibrated for a 12 MHz clock
   *          (3600 loop iterations per millisecond).
   *
   ******************************************************************************

drivers/0x03_button_cbm/Src/rp2350_uart.c

@@ -5,7 +5,7 @@
   * @brief   UART0 driver implementation for RP2350.
   *
   *          Configures UART0 on GPIO 0 (TX) and GPIO 1 (RX) at 115200
-  *          baud using the 14.5 MHz XOSC clock.
+  *          baud using the 12 MHz XOSC clock.
   *
   ******************************************************************************
   * @attention
@@ -59,7 +59,7 @@ static void _uart_configure_pins(void)
 }
 
 /**
-  * @brief  Set UART0 baud rate divisors for 115200 at 14.5 MHz.
+  * @brief  Set UART0 baud rate divisors for 115200 at 12 MHz.
   * @retval None
   */
 static void _uart_set_baud(void)

drivers/0x04_pwm_cbm/Inc/rp2350_delay.h

@@ -4,7 +4,7 @@
   * @author  Kevin Thomas
   * @brief   Delay driver header for RP2350.
   *
-  *          Millisecond busy-wait delay calibrated for a 14.5 MHz clock.
+  *          Millisecond busy-wait delay calibrated for a 12 MHz clock.
   *
   ******************************************************************************
   * @attention

drivers/0x04_pwm_cbm/Inc/rp2350_uart.h

@@ -5,7 +5,7 @@
   * @brief   UART0 driver header for RP2350.
   *
   *          Bare-metal UART0 driver supporting TX/RX on GPIO 0/1 at
-  *          115200 baud (14.5 MHz XOSC clock).
+  *          115200 baud (12 MHz XOSC clock).
   *
   ******************************************************************************
   * @attention

drivers/0x04_pwm_cbm/Src/rp2350_delay.c

@@ -4,7 +4,7 @@
   * @author  Kevin Thomas
   * @brief   Delay driver implementation for RP2350.
   *
-  *          Busy-wait millisecond delay calibrated for a 14.5 MHz clock
+  *          Busy-wait millisecond delay calibrated for a 12 MHz clock
   *          (3600 loop iterations per millisecond).
   *
   ******************************************************************************

drivers/0x04_pwm_cbm/Src/rp2350_uart.c

@@ -5,7 +5,7 @@
   * @brief   UART0 driver implementation for RP2350.
   *
   *          Configures UART0 on GPIO 0 (TX) and GPIO 1 (RX) at 115200
-  *          baud using the 14.5 MHz XOSC clock.
+  *          baud using the 12 MHz XOSC clock.
   *
   ******************************************************************************
   * @attention
@@ -59,7 +59,7 @@ static void _uart_configure_pins(void)
 }
 
 /**
-  * @brief  Set UART0 baud rate divisors for 115200 at 14.5 MHz.
+  * @brief  Set UART0 baud rate divisors for 115200 at 12 MHz.
   * @retval None
   */
 static void _uart_set_baud(void)

drivers/0x05_servo_cbm/Inc/rp2350_delay.h

@@ -4,7 +4,7 @@
   * @author  Kevin Thomas
   * @brief   Delay driver header for RP2350.
   *
-  *          Millisecond busy-wait delay calibrated for a 14.5 MHz clock.
+  *          Millisecond busy-wait delay calibrated for a 12 MHz clock.
   *
   ******************************************************************************
   * @attention

drivers/0x05_servo_cbm/Inc/rp2350_uart.h

@@ -5,7 +5,7 @@
   * @brief   UART0 driver header for RP2350.
   *
   *          Bare-metal UART0 driver supporting TX/RX on GPIO 0/1 at
-  *          115200 baud (14.5 MHz XOSC clock).
+  *          115200 baud (12 MHz XOSC clock).
   *
   ******************************************************************************
   * @attention

drivers/0x05_servo_cbm/Src/rp2350_delay.c

@@ -4,7 +4,7 @@
   * @author  Kevin Thomas
   * @brief   Delay driver implementation for RP2350.
   *
-  *          Busy-wait millisecond delay calibrated for a 14.5 MHz clock
+  *          Busy-wait millisecond delay calibrated for a 12 MHz clock
   *          (3600 loop iterations per millisecond).
   *
   ******************************************************************************

drivers/0x05_servo_cbm/Src/rp2350_servo.c

@@ -6,8 +6,7 @@
   *
   *          Configures PWM slice 3, channel A on GPIO 6 at 50 Hz for
   *          standard hobby servo control. Uses a wrap of 19999 and a
-  *          fractional clock divider of 14.5 (14.5 MHz XOSC / 50 Hz /
+  *          clock divider of 12 (12 MHz XOSC / 50 Hz / 20000 = 12).
-  *          20000 = 14.5).
   *
   ******************************************************************************
   * @attention
@@ -32,14 +31,14 @@
 #define SERVO_SLICE   3U
 
 /**
-  * @brief  Wrap value for 50 Hz at 14.5 MHz with divider 14.5.
+  * @brief  Wrap value for 50 Hz at 12 MHz with divider 12.
   */
 #define SERVO_WRAP    19999U
 
 /**
-  * @brief  Clock divider register value for 14.5 (INT=14, FRAC=8).
+  * @brief  Clock divider register value for 12 (INT=12, FRAC=0).
   */
-#define SERVO_DIV_VAL ((14U << PWM_DIV_INT_SHIFT) | 8U)
+#define SERVO_DIV_VAL ((12U << PWM_DIV_INT_SHIFT) | 0U)
 
 /**
   * @brief  Minimum pulse width in microseconds (0 degrees).

drivers/0x05_servo_cbm/Src/rp2350_uart.c

@@ -5,7 +5,7 @@
   * @brief   UART0 driver implementation for RP2350.
   *
   *          Configures UART0 on GPIO 0 (TX) and GPIO 1 (RX) at 115200
-  *          baud using the 14.5 MHz XOSC clock.
+  *          baud using the 12 MHz XOSC clock.
   *
   ******************************************************************************
   * @attention
@@ -59,7 +59,7 @@ static void _uart_configure_pins(void)
 }
 
 /**
-  * @brief  Set UART0 baud rate divisors for 115200 at 14.5 MHz.
+  * @brief  Set UART0 baud rate divisors for 115200 at 12 MHz.
   * @retval None
   */
 static void _uart_set_baud(void)

drivers/0x06_adc_cbm/Inc/rp2350_delay.h

@@ -4,7 +4,7 @@
   * @author  Kevin Thomas
   * @brief   Delay driver header for RP2350.
   *
-  *          Millisecond busy-wait delay calibrated for a 14.5 MHz clock.
+  *          Millisecond busy-wait delay calibrated for a 12 MHz clock.
   *
   ******************************************************************************
   * @attention

drivers/0x06_adc_cbm/Inc/rp2350_uart.h

@@ -5,7 +5,7 @@
   * @brief   UART0 driver header for RP2350.
   *
   *          Bare-metal UART0 driver supporting TX/RX on GPIO 0/1 at
-  *          115200 baud (14.5 MHz XOSC clock).
+  *          115200 baud (12 MHz XOSC clock).
   *
   ******************************************************************************
   * @attention

drivers/0x06_adc_cbm/Src/rp2350_delay.c

@@ -4,7 +4,7 @@
   * @author  Kevin Thomas
   * @brief   Delay driver implementation for RP2350.
   *
-  *          Busy-wait millisecond delay calibrated for a 14.5 MHz clock
+  *          Busy-wait millisecond delay calibrated for a 12 MHz clock
   *          (3600 loop iterations per millisecond).
   *
   ******************************************************************************

drivers/0x06_adc_cbm/Src/rp2350_uart.c

@@ -5,7 +5,7 @@
   * @brief   UART0 driver implementation for RP2350.
   *
   *          Configures UART0 on GPIO 0 (TX) and GPIO 1 (RX) at 115200
-  *          baud using the 14.5 MHz XOSC clock.
+  *          baud using the 12 MHz XOSC clock.
   *
   ******************************************************************************
   * @attention
@@ -59,7 +59,7 @@ static void _uart_configure_pins(void)
 }
 
 /**
-  * @brief  Set UART0 baud rate divisors for 115200 at 14.5 MHz.
+  * @brief  Set UART0 baud rate divisors for 115200 at 12 MHz.
   * @retval None
   */
 static void _uart_set_baud(void)

drivers/0x07_i2c_cbm/Inc/rp2350_delay.h

@@ -4,7 +4,7 @@
   * @author  Kevin Thomas
   * @brief   Delay driver header for RP2350.
   *
-  *          Millisecond busy-wait delay calibrated for a 14.5 MHz clock.
+  *          Millisecond busy-wait delay calibrated for a 12 MHz clock.
   *
   ******************************************************************************
   * @attention

drivers/0x07_i2c_cbm/Inc/rp2350_uart.h

@@ -5,7 +5,7 @@
   * @brief   UART0 driver header for RP2350.
   *
   *          Bare-metal UART0 driver supporting TX/RX on GPIO 0/1 at
-  *          115200 baud (14.5 MHz XOSC clock).
+  *          115200 baud (12 MHz XOSC clock).
   *
   ******************************************************************************
   * @attention

drivers/0x07_i2c_cbm/Src/rp2350_delay.c

@@ -4,7 +4,7 @@
   * @author  Kevin Thomas
   * @brief   Delay driver implementation for RP2350.
   *
-  *          Busy-wait millisecond delay calibrated for a 14.5 MHz clock
+  *          Busy-wait millisecond delay calibrated for a 12 MHz clock
   *          (3600 loop iterations per millisecond).
   *
   ******************************************************************************

drivers/0x07_i2c_cbm/Src/rp2350_uart.c

@@ -5,7 +5,7 @@
   * @brief   UART0 driver implementation for RP2350.
   *
   *          Configures UART0 on GPIO 0 (TX) and GPIO 1 (RX) at 115200
-  *          baud using the 14.5 MHz XOSC clock.
+  *          baud using the 12 MHz XOSC clock.
   *
   ******************************************************************************
   * @attention
@@ -59,7 +59,7 @@ static void _uart_configure_pins(void)
 }
 
 /**
-  * @brief  Set UART0 baud rate divisors for 115200 at 14.5 MHz.
+  * @brief  Set UART0 baud rate divisors for 115200 at 12 MHz.
   * @retval None
   */
 static void _uart_set_baud(void)

drivers/0x08_lcd1602_cbm/Inc/rp2350_uart.h

@@ -5,7 +5,7 @@
   * @brief   UART0 driver header for RP2350.
   *
   *          Bare-metal UART0 driver supporting TX/RX on GPIO 0/1 at
-  *          115200 baud (14.5 MHz XOSC clock).
+  *          115200 baud (12 MHz XOSC clock).
   *
   ******************************************************************************
   * @attention

drivers/0x08_lcd1602_cbm/Src/rp2350_uart.c

@@ -5,7 +5,7 @@
   * @brief   UART0 driver implementation for RP2350.
   *
   *          Configures UART0 on GPIO 0 (TX) and GPIO 1 (RX) at 115200
-  *          baud using the 14.5 MHz XOSC clock.
+  *          baud using the 12 MHz XOSC clock.
   *
   ******************************************************************************
   * @attention
@@ -59,7 +59,7 @@ static void _uart_configure_pins(void)
 }
 
 /**
-  * @brief  Set UART0 baud rate divisors for 115200 at 14.5 MHz.
+  * @brief  Set UART0 baud rate divisors for 115200 at 12 MHz.
   * @retval None
   */
 static void _uart_set_baud(void)