mirror of
https://github.com/RfidResearchGroup/ChameleonMini.git
synced 2026-05-12 11:20:37 -07:00
Federico Cerutti
4135ca135c
Unvarying interrupt configuration moved from StartISO15693Demod to CodecInit Fixed an old issue (https://github.com/geo-rg/ChameleonMini/issues/4) properly overwriting the PERBUF register when no data has to be sent Loadmodulation ISR has a new GOTO label which is called when ISO t1 time is elapsed, but data is not yet ready. This way it is possible to avoid checking for state validity on every ISR hit New inline function to clean up interrupts when field noise (garbage) is incorrectly picked up Bitrate configuration in ISO15693_EOC has been simplified Cleaned up header file with useless defines. Moved defines to .c when there was no need to share them with other source files Annotated numer of clock cycles consumed by asm ISR sharing routine As usual, this work was done with @MrModDom
49 lines
1.4 KiB
ArmAsm
49 lines
1.4 KiB
ArmAsm
; This file allows to share ISR at runtime with a low overhead.
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; Functions that have to be shared MUST be defined as ISR_SHARED types
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; (Defined in Common.h) to instruct GCC to compile them preserving the stack
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;
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; Created on: 2019-12-06
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; Author: ceres-c
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;
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#include "Codec/Codec.h"
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#include <avr/interrupt.h>
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; Macro to call ISR functions
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; For development purposes: cycles penality before landing in the Shared ISR is 10
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.macro call_isr isr_address
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push r30 ; 1
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push r31 ; 1
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lds r30, \isr_address ; 3
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lds r31, \isr_address+1 ; 3
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icall ; 2 (16 bit PC)
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pop r31
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pop r30
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reti
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.endm
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; Shared ISR must be defined below as globals
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; Example:
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;
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; .global <INTERRUPT-TO-SHARE>
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; INTERRUPT-TO-SHARE:
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; call_isr POINTER-TO-VARIABLE-INTERRUPT-HANDLER
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;
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; Where:
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; INTERRUPT-TO-SHARE
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; The target interrupt which needs to be shared
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; POINTER-TO-VARIABLE-INTERRUPT-HANDLER
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; A pointer to the interrupt handler which can be modified at runtime.
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; Must be a volatile pointer to function declared in Codec.h
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.global CODEC_DEMOD_IN_INT0_VECT
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CODEC_DEMOD_IN_INT0_VECT:
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call_isr isr_func_CODEC_DEMOD_IN_INT0_VECT
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.global CODEC_TIMER_SAMPLING_CCC_VECT
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CODEC_TIMER_SAMPLING_CCC_VECT:
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call_isr isr_func_TCD0_CCC_vect
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.global CODEC_TIMER_LOADMOD_CCB_VECT
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CODEC_TIMER_LOADMOD_CCB_VECT:
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call_isr isr_func_CODEC_TIMER_LOADMOD_CCB_VECT |