mirror of
https://github.com/mytechnotalent/Embedded-Hacking.git
synced 2026-06-06 06:13:59 +02:00
Kevin Thomas
108f3f5598
- Single-wire protocol on GPIO4 via SIO register bit-bang - TIMER0 TIMERAWL for microsecond pulse-width measurement - Tick generator configured for 1 us ticks at 12 MHz clk_ref - UART output: humidity/temperature or wiring failure message - Zero warnings, 1876 bytes text
39 lines
1.0 KiB
C
39 lines
1.0 KiB
C
/**
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******************************************************************************
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* @file rp2350_stack.c
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* @author Kevin Thomas
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* @brief Stack pointer initialization for RP2350.
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*
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* Sets MSP, PSP, MSPLIM, and PSPLIM using inline assembly.
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*
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2026 Kevin Thomas.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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*/
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#include "rp2350_stack.h"
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void stack_init(void)
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{
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__asm__ volatile (
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"ldr r0, =%0\n\t"
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"msr PSP, r0\n\t"
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"ldr r0, =%1\n\t"
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"msr MSPLIM, r0\n\t"
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"msr PSPLIM, r0\n\t"
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"ldr r0, =%0\n\t"
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"msr MSP, r0\n\t"
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:
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: "i" (STACK_TOP), "i" (STACK_LIMIT)
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: "r0"
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);
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}
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