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2024-02-23 13:01:05 +00:00
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37
Libs/RiscV/NEORV32/sw/example/blink_led/blink_led_in_asm.S Normal file
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.file "blink_led_in_asm.S"
.section .text
.balign 4
.global blink_led_asm
blink_led_asm:
/* base address of GPIO controller's output port is passed as argument (in a0)*/
sw zero, 0(a0) /* clear output port */
li t1, 0 /* initialize counter */
blink_loop:
andi t1, t1, 255 /* apply 8-bit mask */
sw t1, 0(a0) /* output current counter value */
addi t1, t1, 1 /* increment counter */
jal ra, blink_delay /* call delay function */
j blink_loop
blink_delay:
li t2, 0xfffff /* delay time */
blink_delay_loop:
beq t2, zero, blink_delay_end
addi t2, t2, -1
nop
nop
j blink_delay_loop
blink_delay_end:
ret
.end

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Libs/RiscV/NEORV32/sw/example/blink_led/makefile Normal file
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#################################################################################################
# << NEORV32 - Application Makefile >> #
# ********************************************************************************************* #
# Make sure to add the RISC-V GCC compiler's bin folder to your PATH environment variable. #
# ********************************************************************************************* #
# BSD 3-Clause License #
# #
# Copyright (c) 2021, Stephan Nolting. All rights reserved. #
# #
# Redistribution and use in source and binary forms, with or without modification, are #
# permitted provided that the following conditions are met: #
# #
# 1. Redistributions of source code must retain the above copyright notice, this list of #
# conditions and the following disclaimer. #
# #
# 2. Redistributions in binary form must reproduce the above copyright notice, this list of #
# conditions and the following disclaimer in the documentation and/or other materials #
# provided with the distribution. #
# #
# 3. Neither the name of the copyright holder nor the names of its contributors may be used to #
# endorse or promote products derived from this software without specific prior written #
# permission. #
# #
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS #
# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF #
# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE #
# COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, #
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE #
# GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED #
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING #
# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED #
# OF THE POSSIBILITY OF SUCH DAMAGE. #
# ********************************************************************************************* #
# The NEORV32 Processor - https://github.com/stnolting/neorv32 (c) Stephan Nolting #
#################################################################################################
# Modify this variable to fit your NEORV32 setup (neorv32 home folder)
NEORV32_HOME ?= ../../..
include $(NEORV32_HOME)/sw/common/common.mk