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author | Alexsander Akers <me@a2.io> | 2022-01-25 15:03:22 -0500 |
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committer | GitHub <noreply@github.com> | 2022-01-25 15:03:22 -0500 |
commit | b8de35658ffd78ad8b22f91ccbbd3d63663afda9 (patch) | |
tree | 1f265ddfcc8e5abf0316b81b15f80bf5c70fa7b7 /watch-library/hardware/watch/watch_extint.c | |
parent | 9e24f6c336773c7404139ab4db0eaab2f99504e2 (diff) | |
download | Sensor-Watch-b8de35658ffd78ad8b22f91ccbbd3d63663afda9.tar.gz Sensor-Watch-b8de35658ffd78ad8b22f91ccbbd3d63663afda9.tar.bz2 Sensor-Watch-b8de35658ffd78ad8b22f91ccbbd3d63663afda9.zip |
Sensor Watch Simulator (#35)
* Put something on screen
* Use the 32bit watch_date_time repr to pass from JS
* Implement periodic callbacks
* Clear display on enabling
* Hook up watch_set_led_color() to SVG (green-only)
* Make debug output full-width
* Remove default Emscripten canvas
* Implement sleep and button clicks
* Fix time zone conversion bug in beats-time app
* Clean up warnings
* Fix pin levels
* Set time zone to browser value (if available)
* Add basic backup data saving
* Silence format specifier warnings in both targets
* Remove unnecessary, copied files
* Use RTC pointer to clear callbacks (if available)
* Use preprocessor define to avoid hardcoding MOVEMENT_NUM_FACES
* Change each face to const preprocessor definition
* Remove Intl.DateTimeFormat usage
* Update shell.html title, header
* Add touch start/end event handlers on SVG buttons
* Update shell.html
* Update folder structure (shared, simulator, hardware under watch-library)
* Tease out shared components from watch_slcd
* Clean up simulator watch_slcd.c inline JS calls
* Fix missing newlines at end of file
* Add simulator warnings (except format, unused-paremter)
* Implement remaining watch_rtc functions
* Fix button bug on mouse down then drag out
* Implement remaining watch_slcd functions
* Link keyboard events to buttons (for keys A, L, M)
* Rewrite event handling (mouse, touch, keyboard) in C
* Set explicit text UTF-8 charset in shell.html
* Address PR comments
* Remove unused directories from include paths
Diffstat (limited to 'watch-library/hardware/watch/watch_extint.c')
-rw-r--r-- | watch-library/hardware/watch/watch_extint.c | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/watch-library/hardware/watch/watch_extint.c b/watch-library/hardware/watch/watch_extint.c new file mode 100644 index 00000000..5924b646 --- /dev/null +++ b/watch-library/hardware/watch/watch_extint.c @@ -0,0 +1,111 @@ +/* + * MIT License + * + * Copyright (c) 2020 Joey Castillo + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include "watch_extint.h" + +void watch_enable_external_interrupts(void) { + // Configure EIC to use GCLK3 (the 32.768 kHz crystal) + hri_gclk_write_PCHCTRL_reg(GCLK, EIC_GCLK_ID, GCLK_PCHCTRL_GEN_GCLK3_Val | (1 << GCLK_PCHCTRL_CHEN_Pos)); + // Enable AHB clock for the EIC + hri_mclk_set_APBAMASK_EIC_bit(MCLK); + // call HAL's external interrupt init function + ext_irq_init(); +} + +void watch_disable_external_interrupts(void) { + ext_irq_deinit(); + hri_mclk_clear_APBAMASK_EIC_bit(MCLK); +} + +void watch_register_interrupt_callback(const uint8_t pin, ext_irq_cb_t callback, watch_interrupt_trigger trigger) { + uint8_t config_index; + uint8_t sense_pos; + switch (pin) { + case A0: + // for EIC channels 8-15, we need to set the SENSE value in CONFIG[1] + config_index = (WATCH_A0_EIC_CHANNEL > 7) ? 1 : 0; + // either way the index in CONFIG[n] must be 0-7 + sense_pos = 4 * (WATCH_A0_EIC_CHANNEL % 8); + break; + case A1: + config_index = (WATCH_A1_EIC_CHANNEL > 7) ? 1 : 0; + sense_pos = 4 * (WATCH_A1_EIC_CHANNEL % 8); + break; + case A2: + config_index = (WATCH_A2_EIC_CHANNEL > 7) ? 1 : 0; + sense_pos = 4 * (WATCH_A2_EIC_CHANNEL % 8); + break; + case A3: + config_index = (WATCH_A3_EIC_CHANNEL > 7) ? 1 : 0; + sense_pos = 4 * (WATCH_A3_EIC_CHANNEL % 8); + break; + case A4: + config_index = (WATCH_A4_EIC_CHANNEL > 7) ? 1 : 0; + sense_pos = 4 * (WATCH_A4_EIC_CHANNEL % 8); + break; + case BTN_ALARM: + config_index = (WATCH_BTN_ALARM_EIC_CHANNEL > 7) ? 1 : 0; + sense_pos = 4 * (WATCH_BTN_ALARM_EIC_CHANNEL % 8); + break; + case BTN_LIGHT: + config_index = (WATCH_BTN_LIGHT_EIC_CHANNEL > 7) ? 1 : 0; + sense_pos = 4 * (WATCH_BTN_LIGHT_EIC_CHANNEL % 8); + break; + case BTN_MODE: + config_index = (WATCH_BTN_MODE_EIC_CHANNEL > 7) ? 1 : 0; + sense_pos = 4 * (WATCH_BTN_MODE_EIC_CHANNEL % 8); + break; + default: + return; + } + + gpio_set_pin_direction(pin, GPIO_DIRECTION_IN); + + // EIC configuration register is enable-protected, so we have to disable it first... + if (hri_eic_get_CTRLA_reg(EIC, EIC_CTRLA_ENABLE)) { + hri_eic_clear_CTRLA_ENABLE_bit(EIC); + // ...and wait for it to synchronize. + hri_eic_wait_for_sync(EIC, EIC_SYNCBUSY_ENABLE); + } + // now update the configuration... + hri_eic_config_reg_t config = EIC->CONFIG[config_index].reg; + config &= ~(7 << sense_pos); + config |= trigger << (sense_pos); + hri_eic_write_CONFIG_reg(EIC, config_index, config); + // ...set the pin mode... + gpio_set_pin_function(pin, GPIO_PIN_FUNCTION_A); + if (pin == BTN_ALARM || pin == BTN_LIGHT || pin == BTN_MODE) gpio_set_pin_pull_mode(pin, GPIO_PULL_DOWN); + // ...and re-enable the EIC + hri_eic_set_CTRLA_ENABLE_bit(EIC); + + ext_irq_register(pin, callback); +} + +inline void watch_register_button_callback(const uint8_t pin, ext_irq_cb_t callback) { + watch_register_interrupt_callback(pin, callback, INTERRUPT_TRIGGER_RISING); +} + +inline void watch_enable_buttons(void) { + watch_enable_external_interrupts(); +} |