From 4a35f927fc1d7b8c3b34f32c1c889fb433752dcc Mon Sep 17 00:00:00 2001 From: Kevin O'Connor Date: Sun, 17 Mar 2019 20:41:52 -0400 Subject: initial_pins: Add ability to configure output pins at mcu startup Signed-off-by: Kevin O'Connor --- src/Kconfig | 9 +++++++++ src/Makefile | 2 +- src/initial_pins.c | 25 +++++++++++++++++++++++++ src/initial_pins.h | 15 +++++++++++++++ 4 files changed, 50 insertions(+), 1 deletion(-) create mode 100644 src/initial_pins.c create mode 100644 src/initial_pins.h (limited to 'src') diff --git a/src/Kconfig b/src/Kconfig index a80e1deb..7e6475b9 100644 --- a/src/Kconfig +++ b/src/Kconfig @@ -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 diff --git a/src/Makefile b/src/Makefile index 546dc0a5..c838e911 100644 --- a/src/Makefile +++ b/src/Makefile @@ -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 diff --git a/src/initial_pins.c b/src/initial_pins.c new file mode 100644 index 00000000..cd478508 --- /dev/null +++ b/src/initial_pins.c @@ -0,0 +1,25 @@ +// Support setting gpio pins at mcu start +// +// Copyright (C) 2019 Kevin O'Connor +// +// 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; ipin), READP(ip->flags) & IP_OUT_HIGH); + } +} +DECL_INIT(initial_pins_setup); diff --git a/src/initial_pins.h b/src/initial_pins.h new file mode 100644 index 00000000..95bb2921 --- /dev/null +++ b/src/initial_pins.h @@ -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 -- cgit v1.2.3-70-g09d2