RP2350_UART_Driver/constants.s at main · mytechnotalent/RP2350_UART_Driver · GitHub

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/**
 * FILE: constants.s
 *
 * DESCRIPTION:
 * RP2350 Memory Addresses and Constants.
 *
 * BRIEF:
 * Defines all memory-mapped register addresses and constants used
 * throughout the RP2350 driver.
 *
 * AUTHOR: Kevin Thomas
 * CREATION DATE: November 27, 2025
 * UPDATE DATE: November 27, 2025
 */

.syntax unified                                  // use unified assembly syntax
.cpu cortex-m33                                  // target Cortex-M33 core
.thumb                                           // use Thumb instruction set

/**
 * Memory addresses and constants.
 */
.equ STACK_TOP,                   0x20082000
.equ STACK_LIMIT,                 0x2007a000
.equ XOSC_BASE,                   0x40048000
.equ XOSC_CTRL,                   XOSC_BASE + 0x00
.equ XOSC_STATUS,                 XOSC_BASE + 0x04
.equ XOSC_STARTUP,                XOSC_BASE + 0x0c
.equ PPB_BASE,                    0xe0000000
.equ CPACR,                       PPB_BASE + 0x0ed88
.equ CLOCKS_BASE,                 0x40010000
.equ CLK_PERI_CTRL,               CLOCKS_BASE + 0x48
.equ RESETS_BASE,                 0x40020000
.equ RESETS_RESET,                RESETS_BASE + 0x0
.equ RESETS_RESET_CLEAR,          RESETS_BASE + 0x3000
.equ RESETS_RESET_DONE,           RESETS_BASE + 0x8
.equ IO_BANK0_BASE,               0x40028000
.equ IO_BANK0_GPIO16_CTRL_OFFSET, 0x84
.equ PADS_BANK0_BASE,             0x40038000
.equ PADS_BANK0_GPIO16_OFFSET,    0x44
.equ UART0_BASE,                  0x40070000