mirror of
https://github.com/tillitis/tillitis-key1.git
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16a9e8c367
This is an import of the fw-2 tag of tkey-libs. We import the entire tkey-libs repo minus dot files into the tillitis-key1 repo to make it very simple not to make mistakes regarding which firmware tag depends on which tkey-libs tag, especially considering locking down with NVCM. Please see README for information about developing with another tkey-libs or how to import future tkey-libs. Since tkey-libs is now a part of the repo we also add tkey-libs to the clean_fw target.
68 lines
1.7 KiB
C
68 lines
1.7 KiB
C
// SPDX-FileCopyrightText: 2023 Tillitis AB <tillitis.se>
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// SPDX-License-Identifier: BSD-2-Clause
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#include <stdbool.h>
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#include <tkey/debug.h>
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#include <tkey/led.h>
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#include <tkey/touch.h>
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// CPU clock frequenzy in Hz
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#define CPUFREQ 18000000
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// clang-format off
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static volatile uint32_t *timer = (volatile uint32_t *)TK1_MMIO_TIMER_TIMER;
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static volatile uint32_t *timer_prescaler = (volatile uint32_t *)TK1_MMIO_TIMER_PRESCALER;
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static volatile uint32_t *timer_status = (volatile uint32_t *)TK1_MMIO_TIMER_STATUS;
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static volatile uint32_t *timer_ctrl = (volatile uint32_t *)TK1_MMIO_TIMER_CTRL;
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static volatile uint32_t *touch = (volatile uint32_t *)TK1_MMIO_TOUCH_STATUS;
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// clang-format on
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// Returns !0 if touch sensor has been touched
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#define touched() (*touch & (1 << TK1_MMIO_TOUCH_STATUS_EVENT_BIT))
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bool touch_wait(int color, int timeout_s)
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{
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int ledon = 0;
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int orig_color = led_get();
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uint32_t time = 0;
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uint32_t lasttime = 0;
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// Tick once every decisecond
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*timer_prescaler = CPUFREQ / 10;
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*timer = timeout_s * 10; // Seconds
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// Start timer
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*timer_ctrl |= (1 << TK1_MMIO_TIMER_CTRL_START_BIT);
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// Acknowledge any stray touch events before waiting for real
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// touch
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*touch = 0;
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// Blink until either the touch sensor has been touched or the
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// timer hits 0.
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while (!touched() && *timer_status != 0) {
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time = *timer;
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if (time % 2 == 0 && time != lasttime) {
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lasttime = time;
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ledon = !ledon;
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led_set(ledon ? color : LED_BLACK);
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}
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}
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// Restore LED
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led_set(orig_color);
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// Do we have a timeout?
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if (*timer_status == 0) {
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return false;
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}
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// Stop timer
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*timer_ctrl |= (1 << TK1_MMIO_TIMER_CTRL_STOP_BIT);
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// Confirm touch event
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*touch = 0;
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return true;
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}
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