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Detect additional key presses on the same output.

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* Interrupts won't follow on additional keys
  pressed on an already "held" output pin,
  so queue additional reads while any keys are held.
This commit is contained in:
Pete Johanson 2020-07-07 16:26:11 -04:00
parent 092fa866af
commit 497049ff68
1 changed files with 13 additions and 3 deletions
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10
app/drivers/zephyr/kscan_gpio_matrix.c
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@ -125,6 +125,7 @@ static int kscan_gpio_config_interrupts(struct device **devices,
} \ } \
static int kscan_gpio_read_##n(struct device *dev) \ static int kscan_gpio_read_##n(struct device *dev) \
{ \ { \
bool submit_follow_up_read = false; \
struct kscan_gpio_data_##n *data = dev->driver_data; \ struct kscan_gpio_data_##n *data = dev->driver_data; \
static bool read_state[INST_MATRIX_ROWS(n)][INST_MATRIX_COLS(n)]; \ static bool read_state[INST_MATRIX_ROWS(n)][INST_MATRIX_COLS(n)]; \
LOG_DBG("Scanning the matrix for updated state"); \ 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++) \ for (int c = 0; c < INST_MATRIX_COLS(n); c++) \
{ \ { \
bool pressed = read_state[r][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]) \ if (pressed != data->matrix_state[r][c]) \
{ \ { \
LOG_DBG("Sending event at %d,%d state %s", \ 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; \ return 0; \
} \ } \
static void kscan_gpio_work_handler_##n(struct k_work *work) \ static void kscan_gpio_work_handler_##n(struct k_work *work) \