diff options
| author | Craig Hesling <hesling@chromium.org> | 2020-02-29 21:44:31 -0800 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2020-03-25 03:23:58 +0000 |
| commit | 5d1fa1bc15a6edd4188d551270b661f4a858b435 (patch) | |
| tree | 8760141853e625143859d0f93e6bdcca7a2aed6d /common/blink.c | |
| parent | 6d2a49dc7f603551ec3d898b74b8740fe0736cd9 (diff) | |
| download | chrome-ec-5d1fa1bc15a6edd4188d551270b661f4a858b435.tar.gz | |
common: Add blink example
Sometime you really just need a sanity check that
the system is still ticking or that a new chip works.
This is "the" rudimentary blink example.
BRANCH=none
BUG=none
TEST=# Add CONFIG_BLINK to nucleo-h743zi board.h
make BOARD=nucleo-h743zi
# Flash to nucleo
# Check lights are counting in binary
Signed-off-by: Craig Hesling <hesling@chromium.org>
Change-Id: Idf2d2bb245bd261806d7202f1557ced477b483c1
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2082074
Reviewed-by: Daisuke Nojiri <dnojiri@chromium.org>
Diffstat (limited to 'common/blink.c')
| -rw-r--r-- | common/blink.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/common/blink.c b/common/blink.c new file mode 100644 index 0000000000..4231e38195 --- /dev/null +++ b/common/blink.c @@ -0,0 +1,30 @@ +/* Copyright 2020 The Chromium OS Authors. All rights reserved. + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +/* This is a sanity check program for boards that have LEDs. */ + +#include "common.h" +#include "gpio.h" +#include "hooks.h" + +#ifndef CONFIG_BLINK_LEDS + #error The macro CONFIG_BLINK_LEDS must be specified to use BLINK. +#endif + +static const enum gpio_signal leds[] = { CONFIG_BLINK_LEDS }; + +BUILD_ASSERT(ARRAY_SIZE(leds) <= sizeof(int)*8, "Too many LEDs to drive."); +BUILD_ASSERT(ARRAY_SIZE(leds) > 0, "Must have at least one LED to blink."); + +static void blink(void) +{ + static int led_values; + + int i; + for (i = 0; i < ARRAY_SIZE(leds); i++) + gpio_set_level(leds[i], BIT(i) & led_values); + led_values++; +} +DECLARE_HOOK(HOOK_TICK, blink, HOOK_PRIO_DEFAULT); |