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F256k matrix keyboard code producing scan codes

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This commit is contained in:
Peter Weingartner 2024-06-29 22:18:55 -04:00
parent 33ffdb09c3
commit e85ab376f9
2 changed files with 35 additions and 46 deletions
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64
src/dev/kbd_f256k.c
View file

@ -56,33 +56,22 @@ static const uint8_t kbd_scan_codes[KBD_ROWS][KBD_COLUMNS] = {
// Driver variables
//
static uint8_t kbd_stat[KBD_MATRIX_SIZE];
static uint16_t kbd_stat[KBD_MATRIX_SIZE];
static short counter = 0;
static uint8_t last_press = 0;
static t_word_ring scan_code_buffer;
/**
* @brief Get the keys selected in a given column
* @brief Get the keys selected in a given row
*
* @param column the number of the column (0 - 8)
* @return uint8_t a bitfield representing the keys in that column (0 = released, 1 = pressed)
* @param row the number of the row to turn on (0 - 7)
* @return uint8_t a bitfield representing the keys in that row (0 = released, 1 = pressed)
*/
static uint8_t kbd_get_rows(short column) {
uint8_t result = 0x00;
static uint16_t kbd_get_columns(uint8_t row) {
uint16_t result = 0;
if (column > 7) {
via0->pb = 0x00;
result = via1->pa;
via0->pb = 0x80;
} else {
via1->pb = ~(0x01 << column);
result = via1->pa;
via1->pb = 0xff;
}
char message[80];
sprintf(message, "Row: %02X, %02X", result, column);
uart_writeln(0, message);
via1->pa = ~(0x01 << row);
result = ((uint16_t)via1->pb | (((uint16_t)(via0->pb) & 0x0080) << 1)) ^ 0x1ff;
return result;
}
@ -96,8 +85,9 @@ static uint8_t kbd_get_rows(short column) {
*/
static void kbd_process_key(short column, short row, bool is_pressed) {
uint8_t scan_code = kbd_scan_codes[row][column];
if (scan_code != 0) {
if (!is_pressed) {
if (is_pressed == 0) {
if (last_press == scan_code) {
// If we released the last key pressed, remove it from the typematic variables
last_press = 0;
@ -112,7 +102,7 @@ static void kbd_process_key(short column, short row, bool is_pressed) {
}
if (!rb_word_full(&scan_code_buffer)) {
rb_word_put(&scan_code_buffer, (unsigned short)scan_code);
rb_word_put(&scan_code_buffer, scan_code);
}
}
}
@ -136,23 +126,23 @@ unsigned short kbd_get_scancode() {
*
*/
void kbd_handle_irq() {
for (short column = 0; column < 8; column++) {
for (uint8_t row = 0; row < 8; row++) {
// Check each column to see if any key is pressed
uint8_t rows_stat = kbd_get_rows(column);
uint8_t rows_eor = kbd_stat[column] ^ rows_stat;
if (rows_eor != 0) {
short row = 0;
uint16_t columns_stat = kbd_get_columns(row);
uint16_t columns_eor = kbd_stat[row] ^ columns_stat;
if (columns_eor != 0) {
short column = 0;
kbd_stat[column] = rows_stat;
while (rows_eor != 0) {
if (rows_eor & 0x01) {
kbd_stat[row] = columns_stat;
while (columns_eor != 0) {
if (columns_eor & 0x01) {
// Current key changed
kbd_process_key(column, row, rows_stat && 0x01);
kbd_process_key(column, row, columns_stat && 0x01);
}
rows_stat = rows_stat >> 1;
rows_eor = rows_eor >> 1;
row++;
columns_stat = columns_stat >> 1;
columns_eor = columns_eor >> 1;
column++;
}
}
}
@ -163,16 +153,16 @@ void kbd_handle_irq() {
*
*/
short kbd_init() {
// Initialize VIA0 -- we'll just write to PB7
// Initialize VIA0 -- we'll just read from PB7
via0->ddra = 0x00;
via0->ddrb = 0x80;
via0->ddrb = 0x00;
via0->acr = 0x00;
via0->pcr = 0x00;
via0->ier = 0x00;
// Initialize VIA1 -- we'll write to all of PB
via1->ddra = 0x00;
via1->ddrb = 0xff;
via1->ddra = 0xff;
via1->ddrb = 0x00;
via1->acr = 0x00;
via1->pcr = 0x00;
via1->ier = 0x00;

17
src/toolbox.c
View file

@ -285,15 +285,14 @@ int main(int argc, char * argv[]) {
initialize();
// while (1) {
// kbd_handle_irq();
// unsigned short scan_code = kbd_get_scancode();
// if (scan_code != 0) {
// tvky_text_matrix[0] = dec2hex((scan_code & 0xf0) >> 4);
// tvky_text_matrix[1] = dec2hex(scan_code & 0x0f);
// tvky_text_matrix[2] += 1;
// }
// }
kbd_init();
while (1) {
kbd_handle_irq();
unsigned short scan_code = kbd_get_scancode();
if (scan_code != 0) {
INFO1("0x%02X ", scan_code);
}
}
// Attempt to start up the user code
// log(LOG_INFO, "Looking for user startup code:");