ASCII Serial Com
Serial communication library between computers, microcontrollers, FPGAs, etc. Uses only ASCII. Not the most efficient protocol, but meant to be easy to read
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riscv
neorv32
neorv32_blink_led.c
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// #################################################################################################
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// # << NEORV32 - Blinking LED Demo Program >> # #
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// *********************************************************************************************
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// # # BSD 3-Clause License # # # # Copyright (c) 2021, Stephan Nolting. All
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// rights reserved. # # # # Redistribution
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// and use in source and binary forms, with or without modification, are # #
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// permitted provided that the following conditions are met: # # # # 1.
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// Redistributions of source code must retain the above copyright notice, this
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// list of # # conditions and the following disclaimer. # # # # 2.
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// Redistributions in binary form must reproduce the above copyright notice,
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// this list of # # conditions and the following disclaimer in the
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// documentation and/or other materials # # provided with the
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// distribution. # #
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// # # 3. Neither the name of the copyright holder nor the names of its
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// contributors may be used to # # endorse or promote products derived from
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// this software without specific prior written # # permission. # # # #
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS # # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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// THE IMPLIED WARRANTIES OF # # MERCHANTABILITY AND FITNESS FOR A
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// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE # # COPYRIGHT
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// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, # # EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE # # GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED # # AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING # # NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED # # OF THE POSSIBILITY OF SUCH DAMAGE. #
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// #
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// *********************************************************************************************
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// # # The NEORV32 Processor - https://github.com/stnolting/neorv32 (c) Stephan
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// Nolting #
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// #################################################################################################
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/**********************************************************************/
/**
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* @file
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*blink_led/main.c
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* @author
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*Stephan
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*Nolting
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* @brief
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*Simple
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*blinking
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*LED
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*demo
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*program
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*using
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*the
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*lowest
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*8
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*bits
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*of
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*the
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*GPIO.output
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*port.
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**************************************************************************/
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#include <neorv32.h>
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/**********************************************************************/
/**
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* @name
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*User
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*configuration
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**************************************************************************/
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/**@{*/
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/** UART BAUD rate */
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#define BAUD_RATE 19200
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/**@}*/
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/**********************************************************************/
/**
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* C
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*function
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*to
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*blink
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*LEDs
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**************************************************************************/
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void
blink_led_c
(
void
);
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/**********************************************************************/
/**
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* Main
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*function;
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*shows
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*an
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*incrementing
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*8-bit
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*counter
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*on
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*GPIO.output(7:0).
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*
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* @note
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*This
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*program
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*requires
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*the
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*GPIO
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*controller
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*to be
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*synthesized
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*(the
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*UART
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*is
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*optional).
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*
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* @return
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*0 if
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*execution
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*was
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*successful
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**************************************************************************/
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int
main
() {
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// init UART (primary UART = UART0; if no id number is specified the primary
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// UART is used) at default baud rate, no parity bits, ho hw flow control
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neorv32_uart0_setup(
BAUD_RATE
, PARITY_NONE, FLOW_CONTROL_NONE);
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// check if GPIO unit is implemented at all
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if
(neorv32_gpio_available() == 0) {
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neorv32_uart0_print(
"Error! No GPIO unit synthesized!\n"
);
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return
1;
// nope, no GPIO unit synthesized
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}
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// capture all exceptions and give debug info via UART
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// this is not required, but keeps us safe
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neorv32_rte_setup();
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// say hello
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neorv32_uart0_print(
"Blinking LED demo program\n"
);
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blink_led_c
();
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return
0;
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}
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/**********************************************************************/
/**
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* C-version
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*of
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*blinky
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*LED
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*counter
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**************************************************************************/
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void
blink_led_c
(
void
) {
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neorv32_gpio_port_set(0);
// clear gpio output
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int
cnt = 0;
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while
(1) {
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neorv32_gpio_port_set(cnt++ &
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0xFF);
// increment counter and mask for lowest 8 bit
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neorv32_cpu_delay_ms(200);
// wait 200ms using busy wait
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}
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}
blink_led_c
void blink_led_c(void)
Definition
neorv32_blink_led.c:140
BAUD_RATE
#define BAUD_RATE
Definition
neorv32_blink_led.c:66
main
int main()
Definition
neorv32_blink_led.c:109
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