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52 lines
1.5 KiB
52 lines
1.5 KiB
#include "power_saving_declarations.h"
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// WARNING: To stay in compliance with the SIL2 rules laid out in STM UM1840, we should never implement any of the available hardware low power modes.
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// See rule: CoU_3
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int power_save_status = POWER_SAVE_STATUS_DISABLED;
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void enable_can_transceivers(bool enabled) {
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// Leave main CAN always on for CAN-based ignition detection
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uint8_t main_bus = (current_board->harness_config->has_harness && (harness.status == HARNESS_STATUS_FLIPPED)) ? 3U : 1U;
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for(uint8_t i=1U; i<=4U; i++){
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current_board->enable_can_transceiver(i, (i == main_bus) || enabled);
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}
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}
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void set_power_save_state(int state) {
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bool is_valid_state = (state == POWER_SAVE_STATUS_ENABLED) || (state == POWER_SAVE_STATUS_DISABLED);
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if (is_valid_state && (state != power_save_status)) {
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bool enable = false;
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if (state == POWER_SAVE_STATUS_ENABLED) {
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print("enable power savings\n");
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// Disable CAN interrupts
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if (harness.status == HARNESS_STATUS_FLIPPED) {
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llcan_irq_disable(cans[0]);
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} else {
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llcan_irq_disable(cans[2]);
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}
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llcan_irq_disable(cans[1]);
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} else {
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print("disable power savings\n");
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if (harness.status == HARNESS_STATUS_FLIPPED) {
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llcan_irq_enable(cans[0]);
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} else {
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llcan_irq_enable(cans[2]);
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}
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llcan_irq_enable(cans[1]);
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enable = true;
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}
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enable_can_transceivers(enable);
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// Switch off IR when in power saving
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if(!enable){
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current_board->set_ir_power(0U);
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}
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power_save_status = state;
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}
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}
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