diff options
| author | Pete Johanson <peter@peterjohanson.com> | 2020-07-07 16:26:11 -0400 |
|---|---|---|
| committer | Pete Johanson <peter@peterjohanson.com> | 2020-07-07 16:26:11 -0400 |
| commit | 497049ff68a43bb52f0138952e1e403be78607f2 (patch) | |
| tree | 89402371ca6c5f1ffdfc3a416d1c9d22ddfc69b1 /app | |
| parent | 092fa866af8f6c528eb7e9e49f76f2d7faaa1797 (diff) | |
Detect additional key presses on the same output.
* Interrupts won't follow on additional keys
pressed on an already "held" output pin,
so queue additional reads while any keys are held.
Diffstat (limited to 'app')
| -rw-r--r-- | app/drivers/zephyr/kscan_gpio_matrix.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/app/drivers/zephyr/kscan_gpio_matrix.c b/app/drivers/zephyr/kscan_gpio_matrix.c index 8b9d143..4a1e0bb 100644 --- a/app/drivers/zephyr/kscan_gpio_matrix.c +++ b/app/drivers/zephyr/kscan_gpio_matrix.c @@ -125,6 +125,7 @@ static int kscan_gpio_config_interrupts(struct device **devices, } \ static int kscan_gpio_read_##n(struct device *dev) \ { \ + bool submit_follow_up_read = false; \ struct kscan_gpio_data_##n *data = dev->driver_data; \ static bool read_state[INST_MATRIX_ROWS(n)][INST_MATRIX_COLS(n)]; \ LOG_DBG("Scanning the matrix for updated state"); \ @@ -155,6 +156,8 @@ static int kscan_gpio_config_interrupts(struct device **devices, for (int c = 0; c < INST_MATRIX_COLS(n); c++) \ { \ bool pressed = read_state[r][c]; \ + /* Follow up reads needed because further interrupts won't fire on already tripped input GPIO pins */ \ + submit_follow_up_read = (submit_follow_up_read || pressed); \ if (pressed != data->matrix_state[r][c]) \ { \ LOG_DBG("Sending event at %d,%d state %s", \ @@ -164,6 +167,13 @@ static int kscan_gpio_config_interrupts(struct device **devices, } \ } \ } \ + if (submit_follow_up_read) { \ + COND_CODE_0(DT_INST_PROP(n, debounce_period), \ + ({ k_work_submit(&data->work); }), \ + ({ \ + k_delayed_work_cancel(&data->work); \ + k_delayed_work_submit(&data->work, K_MSEC(1)); })) \ + } \ return 0; \ } \ static void kscan_gpio_work_handler_##n(struct k_work *work) \ @@ -179,9 +189,9 @@ static int kscan_gpio_config_interrupts(struct device **devices, CONTAINER_OF(cb, struct kscan_gpio_irq_callback_##n, callback); \ COND_CODE_0(DT_INST_PROP(n, debounce_period), \ ({ k_work_submit(data->work); }), \ - ({ \ - k_delayed_work_cancel(data->work); \ - k_delayed_work_submit(data->work, K_MSEC(DT_INST_PROP(n, debounce_period))); })) \ + ({ \ + k_delayed_work_cancel(data->work); \ + k_delayed_work_submit(data->work, K_MSEC(DT_INST_PROP(n, debounce_period))); })) \ } \ static struct kscan_gpio_data_##n kscan_gpio_data_##n = { \ .rows = { [INST_MATRIX_ROWS(n)-1] = NULL}, \ |