pana_m8: Move keyboard to converter directory

converter/pana_m8/pana_m8.c

@@ -0,0 +1,72 @@
+#include <avr/io.h>
+#include <avr/pgmspace.h>
+#include "matrix.h"
+#include "led.h"
+#include "wait.h"
+#include "debug.h"
+
+#define CLK_HI() (PORTD |=  (1<<0))
+#define CLK_LO() (PORTD &= ~(1<<0))
+#define STATE()  (PIND & (1<<1))
+#define RST_HI() (PORTD |=  (1<<3))
+#define RST_LO() (PORTD &= ~(1<<3))
+#define SENSE()  (PIND & (1<<2))
+
+static matrix_row_t matrix[8] = {};
+
+
+void matrix_init(void)
+{
+    debug_enable = true;
+    debug_keyboard = true;
+    debug_matrix = true;
+
+    // PD0: Clock. Counter couts up at falling edge.
+    // PD1: Key State. Hi if selected key is activated.
+    // PD2: Sense. Lo if any key is activated while Reset is Hi.
+    // PD3: Reset. Resets counters at riging edge.
+    DDRD  |=   (1<<3) | (1<<0);     // output
+    DDRD  &= ~((1<<2) | (1<<1));    // input
+    PORTD &= ~((1<<3) | (1<<0));    // low
+    PORTD |=   (1<<2) | (1<<1);     // pull-up
+
+    dprintf("init\n");
+}
+
+uint8_t matrix_scan(void)
+{
+    // TODO: debouce & unplug detect
+    // Reset counters
+    RST_HI();
+    wait_us(10);
+    RST_LO();
+    wait_us(10);
+
+    // 8x8 matrix:  row:sense, col:drive, key_on:hi
+    for (uint8_t col = 0; col < 8; col++) {
+        for (uint8_t row = 0; row < 8; row++) {
+            CLK_HI();
+            wait_us(10);
+
+            if (STATE()) {
+                matrix[row] |=  (1<<col);
+            } else {
+                matrix[row] &= ~(1<<col);
+            }
+            
+            // proceed counter - next row
+            CLK_LO();
+            wait_us(10);
+        }
+    }
+    return 1;
+}
+
+matrix_row_t matrix_get_row(uint8_t row)
+{
+    return matrix[row];
+}
+
+void led_set(uint8_t usb_led)
+{
+}