Steve Karg
4781582204
* Changed ATmega168 example for ATmega328 on Arduino Uno R3 with DFR0259 RS485 shield. Added ADC interface from BDK port and mapped to some AV objects. Removed MS/TP MAC address DIP switch GPIO and moved MS/TP configuration to AV objects. Added AV units property. Added some Uno R3 Digital Inputs and outputs mapped to some BV. Added AVR EEPROM from BDK port and mapped some non-volatile data including MAC address and max manager and baud rate, device ID and names and description and location.
84 lines
1.6 KiB
C
84 lines
1.6 KiB
C
/**
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* @brief The module handles CSTACK monitoring
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* @author Steve Karg <skarg@users.sourceforge.net>
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* @date 2009
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* @copyright SPDX-License-Identifier: MIT
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*/
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#include <stdint.h>
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#include "hardware.h"
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#include "stack.h"
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/* stack checking */
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#if defined(__GNUC__)
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extern uint8_t _end;
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extern uint8_t __stack;
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#endif
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#if defined(__GNUC__)
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#define STACK_CANARY (0xC5)
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void stack_init(void) __attribute__((naked)) __attribute__((section(".init1")));
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#endif
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void stack_init(void)
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{
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#if defined(__GNUC__)
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#if 0
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uint8_t *p = &_end;
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while (p <= &__stack) {
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*p = STACK_CANARY;
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p++;
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}
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#else
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__asm volatile(" ldi r30,lo8(_end)\n"
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" ldi r31,hi8(_end)\n"
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" ldi r24,lo8(0xc5)\n" /* STACK_CANARY = 0xc5 */
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" ldi r25,hi8(__stack)\n"
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" rjmp .cmp\n"
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".loop:\n"
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" st Z+,r24\n"
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".cmp:\n"
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" cpi r30,lo8(__stack)\n"
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" cpc r31,r25\n"
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" brlo .loop\n"
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" breq .loop" ::);
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#endif
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#endif
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}
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unsigned stack_size(void)
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{
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#if defined(__GNUC__)
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return (&__stack) - (&_end);
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#else
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return 0;
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#endif
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}
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uint8_t stack_byte(unsigned offset)
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{
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#if defined(__GNUC__)
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return *(&_end + offset);
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#else
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offset = offset;
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return 0;
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#endif
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}
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unsigned stack_unused(void)
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{
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unsigned count = 0;
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#if defined(__GNUC__)
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uint8_t *p = &_end;
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while (p <= &__stack) {
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if ((*p) != STACK_CANARY) {
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count = p - (&_end);
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break;
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}
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p++;
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}
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#endif
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return count;
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}
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