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initial_pins: Add ability to configure output pins at mcu startup

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Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2019-03-17 20:41:52 -04:00
parent 0af89e4766
commit 4a35f927fc
5 changed files with 103 additions and 4 deletions
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9
src/Kconfig
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@ -88,6 +88,15 @@ config STEP_DELAY
The default for AVR is -1, for all other micro-controllers it
is 2us.
config INITIAL_PINS
string "GPIO pins to set at micro-controller startup"
depends on LOW_LEVEL_OPTIONS
help
One may specify a comma separated list of gpio pins to set
during the micro-controller startup sequence. By default the
pins will be set to output high - preface a pin with a '!'
character to set that pin to output low.
# The HAVE_GPIO_x options allow boards to disable support for some
# commands if the hardware does not support the feature.
config HAVE_GPIO

2
src/Makefile
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@ -1,6 +1,6 @@
# Main code build rules
src-y += sched.c command.c basecmd.c debugcmds.c
src-y += sched.c command.c basecmd.c debugcmds.c initial_pins.c
src-$(CONFIG_HAVE_GPIO) += gpiocmds.c stepper.c endstop.c
src-$(CONFIG_HAVE_GPIO_ADC) += adccmds.c
src-$(CONFIG_HAVE_GPIO_SPI) += spicmds.c thermocouple.c

25
src/initial_pins.c Normal file
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@ -0,0 +1,25 @@
// Support setting gpio pins at mcu start
//
// Copyright (C) 2019 Kevin O'Connor <kevin@koconnor.net>
//
// This file may be distributed under the terms of the GNU GPLv3 license.
#include "autoconf.h" // CONFIG_INITIAL_PINS
#include "board/gpio.h" // gpio_out_setup
#include "board/pgm.h" // READP
#include "ctr.h" // DECL_CTR
#include "initial_pins.h" // initial_pins
#include "sched.h" // DECL_INIT
DECL_CTR("DECL_INITIAL_PINS " __stringify(CONFIG_INITIAL_PINS));
void
initial_pins_setup(void)
{
int i;
for (i=0; i<initial_pins_size; i++) {
const struct initial_pin_s *ip = &initial_pins[i];
gpio_out_setup(READP(ip->pin), READP(ip->flags) & IP_OUT_HIGH);
}
}
DECL_INIT(initial_pins_setup);

15
src/initial_pins.h Normal file
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@ -0,0 +1,15 @@
#ifndef __INITIAl_PINS_H
#define __INITIAl_PINS_H
struct initial_pin_s {
int pin;
uint8_t flags;
};
enum { IP_OUT_HIGH = 1 };
// out/compile_time_request.c (auto generated file)
extern const struct initial_pin_s initial_pins[];
extern const int initial_pins_size;
#endif // initial_pins.h