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implement backlight and lower power matrix scanning

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With this change the 3.3V rail gets down to 22mA
The backlight and power led will auto turn off when the keyboard
SLEEP# goes low, and will resume when the sleep pin goes high.

For some reason WFI does not sleep as long as I would expect.
Something is triggering interrupts constantly
that we need to figure out to save power.

Signed-off-by: Kieran Levin <ktl@frame.work>
This commit is contained in:
Kieran Levin 2023-05-26 16:14:15 -07:00 committed by Daniel Schaefer
parent e42ca81a49
commit e5d1f3cfd8
1 changed files with 26 additions and 8 deletions
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34
keyboards/framework/matrix.c
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@ -76,7 +76,7 @@ void adc_gpio_init(int gpio) {
/**
* Tell the mux to select a specific column
*
*
* Splits the positive integer (<=7) into its three component bits.
*/
static void mux_select_row(int row) {
@ -258,12 +258,28 @@ static adc10ksample_t read_adc(void) {
*
* If the host is awake but the keyboard is idle it should enter a low-power state
*/
void handle_idle(void) {
bool handle_idle(void) {
bool asleep = readPin(SLEEP_GPIO);
(void)asleep;
//uprintf("Host asleep: %d\n", asleep);
// TODO: Implement idle behavior
static uint8_t prev_asleep = -1;
static int host_sleep = 0;
/* reduce the scan speed to 10Hz */
if (prev_asleep != asleep) {
prev_asleep = asleep;
if (!asleep) {
suspend_power_down_quantum();
} else {
suspend_wakeup_init_quantum();
}
}
if (!asleep) {
if (timer_elapsed32(host_sleep) < 100) {
port_wait_for_interrupt();
return true;
} else {
host_sleep = timer_read32();
}
}
return false;
}
/**
@ -272,7 +288,9 @@ void handle_idle(void) {
bool matrix_scan_custom(matrix_row_t current_matrix[]) {
bool changed = false;
handle_idle();
if (handle_idle()) {
return false;
}
//wait_us(500 * 1000);
// Drive all high to deselect them
@ -315,7 +333,7 @@ bool matrix_scan_custom(matrix_row_t current_matrix[]) {
/**
* Enable the ADC MUX
*
*
* TODO: Do we need a de-init? Probably not.
*/
static void adc_mux_init(void) {