78 lines
2.3 KiB
C
78 lines
2.3 KiB
C
#ifndef BMC_HANDLER_H
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#define BMC_HANDLER_H
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#define PW_SWITCH_PIN 0
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#define PW_SWITCH_DELAY_MS 100
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#define PW_SWITCH_INV 0
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#define PW_STATE_PIN 1
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#define PW_STATE_UPDATE_REPEAT_DELAY_MS 100
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#define PW_STATE_INV 1
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typedef struct CURRENT_STATE_T_ {
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float voltage;
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float tempC;
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bool power_state;
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} CURRENT_STATE_T;
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struct repeating_timer * state_update_timer = NULL;
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CURRENT_STATE_T current_state;
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// handler fn to set the power switch pin to an active state
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int64_t pw_sw_on_async (alarm_id_t id, void * user_data) {
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cyw43_arch_gpio_put(CYW43_WL_GPIO_LED_PIN, 0);
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gpio_put(PW_SWITCH_PIN, 1 ^ PW_SWITCH_INV);
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return 0; // do not reschedule alarm
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}
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// handler fn to set the power switch pin to an inactive state
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int64_t pw_sw_off_async (alarm_id_t id, void * user_data) {
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cyw43_arch_gpio_put(CYW43_WL_GPIO_LED_PIN, 1);
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gpio_put(PW_SWITCH_PIN, 0 ^ PW_SWITCH_INV);
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return 0; // do not reschedule alarm
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}
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// hander fn to read from the power state
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bool update_current_state_async (repeating_timer_t * rt) {
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current_state.voltage = adc_read() * 3.3f / (1 << 12);
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current_state.tempC = 27.0f - (current_state.voltage - 0.706f) / 0.001721f;
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current_state.power_state = gpio_get(PW_STATE_PIN) ^ PW_STATE_INV;
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return true; // continue repeating alarm
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}
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// handler fn called to attempt to set the power state to the requested state
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void bmc_power_handler (bool requested_power_state) {
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if (requested_power_state != current_state.power_state) {
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add_alarm_in_ms(0, pw_sw_on_async, NULL, true);
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add_alarm_in_ms(PW_SWITCH_DELAY_MS, pw_sw_off_async, NULL, true);
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}
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}
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void bmc_handler_init () {
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// init power switch pin as output
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gpio_init(PW_SWITCH_PIN);
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gpio_set_dir(PW_SWITCH_DELAY_MS, GPIO_OUT);
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// init power state pin as input
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gpio_init(PW_STATE_PIN);
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gpio_set_dir(PW_STATE_PIN, GPIO_IN);
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// init adc input
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adc_init();
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adc_set_temp_sensor_enabled(true);
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adc_select_input(4);
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// set repeating timer for power state update
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state_update_timer = malloc(sizeof(struct repeating_timer));
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add_repeating_timer_ms(PW_STATE_UPDATE_REPEAT_DELAY_MS, update_current_state_async, NULL, state_update_timer);
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DEBUG_printf("[BMC ] [OK ] BMC initialized successfully\n");
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}
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void bmc_handler_deinit () {
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cancel_repeating_timer(state_update_timer);
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free(state_update_timer);
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state_update_timer = NULL;
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}
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#endif |