hueso/Sensor-Watch
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Activity

external interrupt refactor: allow enabling in watch library functions

Browse Source
This commit is contained in:
Joey Castillo
2021-08-25 12:15:58 -06:00
parent c35e8e2b07
commit d09d3c3c95
8 changed files with 234 additions and 129 deletions
Download Patch File Download Diff File Expand all files Collapse all files

102
watch-library/watch/watch_extint.c
View File

@@ -22,18 +22,96 @@
* SOFTWARE.
*/
void watch_enable_buttons() {
EXTERNAL_IRQ_0_init();
void watch_enable_external_interrupts() {
// 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_register_button_callback(const uint8_t pin, ext_irq_cb_t callback) {
if (pin == BTN_ALARM) {
gpio_set_pin_direction(BTN_ALARM, GPIO_DIRECTION_IN);
gpio_set_pin_pull_mode(BTN_ALARM, GPIO_PULL_DOWN);
gpio_set_pin_function(BTN_ALARM, PINMUX_PA02G_RTC_IN2);
btn_alarm_callback = callback;
_extwake_register_callback(&CALENDAR_0.device, extwake_callback);
} else {
ext_irq_register(pin, callback);
}
void watch_disable_external_interrupts() {
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) {
uint32_t pinmux;
hri_eic_config_reg_t config = hri_eic_get_CONFIG_reg(EIC, 0, 0xFFFFFFFF);
switch (pin) {
case A4:
// same steps for each: determine the correct pin mux...
pinmux = PINMUX_PB00A_EIC_EXTINT0;
// ...clear out the configuration for this EIC channel...
config &= ~EIC_CONFIG_SENSE0_Msk;
// ...and reconfigure it with our new trigger value.
config |= EIC_CONFIG_SENSE0(trigger);
break;
case A1:
pinmux = PINMUX_PB01A_EIC_EXTINT1;
config &= ~EIC_CONFIG_SENSE1_Msk;
config |= EIC_CONFIG_SENSE1(trigger);
break;
case BTN_ALARM:
gpio_set_pin_pull_mode(pin, GPIO_PULL_DOWN);
pinmux = PINMUX_PA02A_EIC_EXTINT2;
config &= ~EIC_CONFIG_SENSE2_Msk;
config |= EIC_CONFIG_SENSE2(trigger);
break;
case A2:
pinmux = PINMUX_PB02A_EIC_EXTINT2;
config &= ~EIC_CONFIG_SENSE2_Msk;
config |= EIC_CONFIG_SENSE2(trigger);
break;
case A3:
pinmux = PINMUX_PB03A_EIC_EXTINT3;
config &= ~EIC_CONFIG_SENSE3_Msk;
config |= EIC_CONFIG_SENSE3(trigger);
break;
case A0:
pinmux = PINMUX_PB04A_EIC_EXTINT4;
config &= ~EIC_CONFIG_SENSE4_Msk;
config |= EIC_CONFIG_SENSE4(trigger);
break;
case BTN_LIGHT:
gpio_set_pin_pull_mode(pin, GPIO_PULL_DOWN);
pinmux = PINMUX_PA22A_EIC_EXTINT6;
config &= ~EIC_CONFIG_SENSE6_Msk;
config |= EIC_CONFIG_SENSE6(trigger);
break;
case BTN_MODE:
gpio_set_pin_pull_mode(pin, GPIO_PULL_DOWN);
pinmux = PINMUX_PA23A_EIC_EXTINT7;
config &= ~EIC_CONFIG_SENSE7_Msk;
config |= EIC_CONFIG_SENSE7(trigger);
break;
default:
return;
}
gpio_set_pin_direction(pin, GPIO_DIRECTION_IN);
gpio_set_pin_function(pin, pinmux);
// 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_write_CONFIG_reg(EIC, 0, config);
// ...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() {
watch_enable_external_interrupts();
}