81 lines
3.3 KiB
C
81 lines
3.3 KiB
C
#include "fsl_gpio.h"
|
|
#include "key_matrix.h"
|
|
|
|
#ifdef OLD_MATRIX
|
|
|
|
// This ifdef clause will be completely erased as soon as Santiago's prototype will be out of use.
|
|
// Since the creation of his v6.0 prototype the diodes of the key matrix have been reversed in order
|
|
// to optimize the key scanning algorithm.
|
|
|
|
void KeyMatrix_Init(key_matrix_t *keyMatrix)
|
|
{
|
|
for (uint8_t col_i=0; col_i<keyMatrix->colNum; col_i++) {
|
|
key_matrix_pin_t col = keyMatrix->cols[col_i];
|
|
CLOCK_EnableClock(col.clock);
|
|
PORT_SetPinConfig(col.port, col.pin,
|
|
&(port_pin_config_t){.pullSelect=kPORT_PullDisable, .mux=kPORT_MuxAsGpio});
|
|
GPIO_PinInit(col.gpio, col.pin, &(gpio_pin_config_t){kGPIO_DigitalOutput, 0});
|
|
}
|
|
|
|
for (uint8_t row_i=0; row_i<keyMatrix->rowNum; row_i++) {
|
|
key_matrix_pin_t row = keyMatrix->rows[row_i];
|
|
CLOCK_EnableClock(row.clock);
|
|
PORT_SetPinConfig(row.port, row.pin,
|
|
&(port_pin_config_t){.pullSelect=kPORT_PullDown, .mux=kPORT_MuxAsGpio});
|
|
GPIO_PinInit(row.gpio, row.pin, &(gpio_pin_config_t){kGPIO_DigitalInput});
|
|
}
|
|
}
|
|
|
|
void KeyMatrix_Scan(key_matrix_t *keyMatrix)
|
|
{
|
|
for (uint8_t col=0; col<keyMatrix->colNum; col++) {
|
|
GPIO_WritePinOutput(keyMatrix->cols[col].gpio, keyMatrix->cols[col].pin, 1);
|
|
for (uint8_t row=0; row<keyMatrix->rowNum; row++) {
|
|
keyMatrix->keyStates[row*keyMatrix->colNum + col] = GPIO_ReadPinInput(keyMatrix->rows[row].gpio, keyMatrix->rows[row].pin);
|
|
}
|
|
GPIO_WritePinOutput(keyMatrix->cols[col].gpio, keyMatrix->cols[col].pin, 0);
|
|
for (volatile uint32_t i=0; i<100; i++); // Wait for the new port state to settle. This avoid bogus key state detection.
|
|
}
|
|
}
|
|
|
|
#else
|
|
|
|
void KeyMatrix_Init(key_matrix_t *keyMatrix)
|
|
{
|
|
for (key_matrix_pin_t *row = keyMatrix->rows; row < keyMatrix->rows + keyMatrix->rowNum; row++) {
|
|
CLOCK_EnableClock(row->clock);
|
|
PORT_SetPinConfig(row->port, row->pin,
|
|
&(port_pin_config_t){.pullSelect=kPORT_PullDisable, .mux=kPORT_MuxAsGpio});
|
|
GPIO_PinInit(row->gpio, row->pin, &(gpio_pin_config_t){kGPIO_DigitalOutput, 0});
|
|
}
|
|
|
|
for (key_matrix_pin_t *col = keyMatrix->cols; col < keyMatrix->cols + keyMatrix->colNum; col++) {
|
|
CLOCK_EnableClock(col->clock);
|
|
PORT_SetPinConfig(col->port, col->pin,
|
|
&(port_pin_config_t){.pullSelect=kPORT_PullDown, .mux=kPORT_MuxAsGpio});
|
|
GPIO_PinInit(col->gpio, col->pin, &(gpio_pin_config_t){kGPIO_DigitalInput});
|
|
}
|
|
}
|
|
|
|
void KeyMatrix_Scan(key_matrix_t *keyMatrix)
|
|
{
|
|
uint8_t *keyState = keyMatrix->keyStates;
|
|
|
|
key_matrix_pin_t *rowEnd = keyMatrix->rows + keyMatrix->rowNum;
|
|
for (key_matrix_pin_t *row = keyMatrix->rows; row<rowEnd; row++) {
|
|
GPIO_Type *rowGpio = row->gpio;
|
|
uint32_t rowPin = row->pin;
|
|
GPIO_WritePinOutput(rowGpio, rowPin, 1);
|
|
|
|
key_matrix_pin_t *colEnd = keyMatrix->cols + keyMatrix->colNum;
|
|
for (key_matrix_pin_t *col = keyMatrix->cols; col<colEnd; col++) {
|
|
*(keyState++) = GPIO_ReadPinInput(col->gpio, col->pin);
|
|
}
|
|
|
|
GPIO_WritePinOutput(rowGpio, rowPin, 0);
|
|
for (volatile uint32_t i=0; i<100; i++); // Wait for the new port state to settle. This avoid bogus key state detection.
|
|
}
|
|
}
|
|
|
|
#endif
|