diff options
| -rw-r--r-- | two_hosts_auto_powerswitch/src/logic.c | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/two_hosts_auto_powerswitch/src/logic.c b/two_hosts_auto_powerswitch/src/logic.c new file mode 100644 index 0000000..04bf3ff --- /dev/null +++ b/two_hosts_auto_powerswitch/src/logic.c @@ -0,0 +1,121 @@ + +/* +Skip table: +serial skip update -> update skip table +computer state table update -> reset skip lines of updated computers + +Computer state table: +Host state change detection -> lookup skip table -> update computer state table +computer button toggle -> update computer state table +serial logical computer state toggle -> update computer state table + +Outlet table: +outlet toggle button -> update table +computer state table update -> update table +serial toggle command -> update table + +Outlet table update can start timer (doing eventually a relay switch on or off +action), switch on relay directly, switch off relay directly. +*/ + +/* sources of wakeup are: + * - every button press + * - computer state input change + * - uart rx + */ + +#define OUTLET_BUTTONS_MASK 0x1F +#define COMPUTER_BUTTONS_MASK 0x60 +#define OUTLET_BUTTONS_SHIFT 0 +#define COMPUTER_BUTTONS_SHIFT 5 + +static struct tables_t { + volatile uint8_t buttons:7; // accessed by interrupt functions + uint8_t buttons_old:7; + volatile uint8_t computers:2; // accessed by interrupt functions + uint8_t computers_old:2; + uint8_t computer_state:2; + uint8_t computer_state_old:2; +} tables; + +static struct uart_t { + volatile uint8_t rxfifo[8]; + volatile uint8_t txfifo[8]; + volatile uint8_t rxindex:4; + volatile uint8_t txindex:4; +} uart; + +static void interrupt_pin_change(void) +{ + update_button_table(); + update_computer_input_table(); +} + +static void interrupt_uart_rx(void) +{ + echo_back(); + update_rx_fifo(); +} + +static void process_uart_rx(void) +{ + switch (get_next_char()) { + case 'C': + break; + case 'T': + break; + case 'c': + break; + case 't': + break; + case 's': + break; + + case 255: + break; + } +} + +static void update_outlet_table(uint8_t changed) +{ +} + +static void update_computer_table(uint8_t changed) +{ +} + + +static void main_loop(void) +{ + uint8_t changed; + for (;;) { + + // read tables.buttons only one time (8bits access, 8bits cpu, atomic) + changed = tables.buttons ^ tables.buttons_old; + tables.buttons_old ^= changed; + + if (changed & COMPUTER_BUTTONS_MASK) { + update_computer_table(changed >> COMPUTER_BUTTONS_SHIFT); + } + + changed = tables.computer_state ^ tables.computer_state_old; + tables.computer_state_old ^= changed; + + if (changed & OUTLET_BUTTONS_MASK) { + update_outlet_table(changed >> OUTLET_BUTTONS_SHIFT); + } + + changed = tables.computer_state ^ tables.computer_state_old; + tables.computer_state_old ^= changed; + + // read computers state change + changed = tables.computers ^ tables.computers_old; + + if (changed) { + } + + process_uart_rx(); + + standby(); + } +} |