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Diffstat (limited to 'tmk_core/protocol/next_kbd.c')
-rw-r--r--tmk_core/protocol/next_kbd.c127
1 files changed, 67 insertions, 60 deletions
diff --git a/tmk_core/protocol/next_kbd.c b/tmk_core/protocol/next_kbd.c
index fa3034b3fe..6f118e6172 100644
--- a/tmk_core/protocol/next_kbd.c
+++ b/tmk_core/protocol/next_kbd.c
@@ -1,7 +1,7 @@
/*
NeXT non-ADB Keyboard Protocol
-
+
Copyright 2013, Benjamin Gould (bgould@github.com)
Based on:
@@ -53,10 +53,10 @@ POSSIBILITY OF SUCH DAMAGE.
#include "next_kbd.h"
#include "debug.h"
-static inline void out_lo(void);
-static inline void out_hi(void);
-static inline void query(void);
-static inline void reset(void);
+static inline void out_lo(void);
+static inline void out_hi(void);
+static inline void query(void);
+static inline void reset(void);
static inline uint32_t response(void);
/* The keyboard sends signal with 50us pulse width on OUT line
@@ -65,53 +65,65 @@ static inline uint32_t response(void);
* but it works well with 51us(+1us) on TMK converter(ATMeaga32u2) at least.
* TODO: test on Teensy and Pro Micro configuration
*/
-#define out_hi_delay(intervals) do { out_hi(); _delay_us((NEXT_KBD_TIMING+1) * intervals); } while (0);
-#define out_lo_delay(intervals) do { out_lo(); _delay_us((NEXT_KBD_TIMING+1) * intervals); } while (0);
-#define query_delay(intervals) do { query(); _delay_us((NEXT_KBD_TIMING+1) * intervals); } while (0);
-#define reset_delay(intervals) do { reset(); _delay_us((NEXT_KBD_TIMING+1) * intervals); } while (0);
-
-void next_kbd_init(void)
-{
+#define out_hi_delay(intervals) \
+ do { \
+ out_hi(); \
+ _delay_us((NEXT_KBD_TIMING + 1) * intervals); \
+ } while (0);
+#define out_lo_delay(intervals) \
+ do { \
+ out_lo(); \
+ _delay_us((NEXT_KBD_TIMING + 1) * intervals); \
+ } while (0);
+#define query_delay(intervals) \
+ do { \
+ query(); \
+ _delay_us((NEXT_KBD_TIMING + 1) * intervals); \
+ } while (0);
+#define reset_delay(intervals) \
+ do { \
+ reset(); \
+ _delay_us((NEXT_KBD_TIMING + 1) * intervals); \
+ } while (0);
+
+void next_kbd_init(void) {
out_hi();
- NEXT_KBD_IN_DDR &= ~(1<<NEXT_KBD_IN_BIT); // KBD_IN to input
- NEXT_KBD_IN_PORT |= (1<<NEXT_KBD_IN_BIT); // KBD_IN pull up
-
+ NEXT_KBD_IN_DDR &= ~(1 << NEXT_KBD_IN_BIT); // KBD_IN to input
+ NEXT_KBD_IN_PORT |= (1 << NEXT_KBD_IN_BIT); // KBD_IN pull up
+
query_delay(5);
reset_delay(8);
-
+
query_delay(5);
reset_delay(8);
}
-void next_kbd_set_leds(bool left, bool right)
-{
+void next_kbd_set_leds(bool left, bool right) {
cli();
out_lo_delay(9);
-
+
out_hi_delay(3);
out_lo_delay(1);
-
+
if (left) {
out_hi_delay(1);
} else {
out_lo_delay(1);
}
-
+
if (right) {
out_hi_delay(1);
} else {
out_lo_delay(1);
}
-
+
out_lo_delay(7);
out_hi();
sei();
}
-#define NEXT_KBD_READ (NEXT_KBD_IN_PIN&(1<<NEXT_KBD_IN_BIT))
-uint32_t next_kbd_recv(void)
-{
-
+#define NEXT_KBD_READ (NEXT_KBD_IN_PIN & (1 << NEXT_KBD_IN_BIT))
+uint32_t next_kbd_recv(void) {
// First check to make sure that the keyboard is actually connected;
// if not, just return
// TODO: reflect the status of the keyboard in a return code
@@ -122,22 +134,23 @@ uint32_t next_kbd_recv(void)
query();
uint32_t resp = response();
-
+
return resp;
}
-static inline uint32_t response(void)
-{
+static inline uint32_t response(void) {
cli();
-
+
// try a 5ms read; this should be called after the query method has
// been run so if a key is pressed we should get a response within
// 5ms; if not then send a reset and exit
- uint8_t i = 0;
- uint32_t data = 0;
+ uint8_t i = 0;
+ uint32_t data = 0;
uint16_t reset_timeout = 50000;
- while (NEXT_KBD_READ && reset_timeout) {
- asm(""); _delay_us(1); reset_timeout--;
+ while (NEXT_KBD_READ && reset_timeout) {
+ asm("");
+ _delay_us(1);
+ reset_timeout--;
}
if (!reset_timeout) {
reset();
@@ -145,64 +158,58 @@ static inline uint32_t response(void)
return 0;
}
_delay_us(NEXT_KBD_TIMING / 2);
- for (; i < 22; i++)
- {
- if (NEXT_KBD_READ)
- {
- data |= ((uint32_t) 1 << i);
+ for (; i < 22; i++) {
+ if (NEXT_KBD_READ) {
+ data |= ((uint32_t)1 << i);
/* Note:
* My testing with the ATmega32u4 showed that there might
* something wrong with the timing here; by the end of the
* second data byte some of the modifiers can get bumped out
* to the next bit over if we just cycle through the data
- * based on the expected interval. There is a bit (i = 10)
- * in the middle of the data that is always on followed by
- * one that is always off - so we'll use that to reset our
+ * based on the expected interval. There is a bit (i = 10)
+ * in the middle of the data that is always on followed by
+ * one that is always off - so we'll use that to reset our
* timing in case we've gotten ahead of the keyboard;
*/
- if (i == 10)
- {
+ if (i == 10) {
i++;
- while (NEXT_KBD_READ) ;
+ while (NEXT_KBD_READ)
+ ;
_delay_us(NEXT_KBD_TIMING / 2);
}
} else {
/* redundant - but I don't want to remove if it might screw
* up the timing
*/
- data |= ((uint32_t) 0 << i);
+ data |= ((uint32_t)0 << i);
}
_delay_us(NEXT_KBD_TIMING);
}
-
+
sei();
-
+
return data;
}
-static inline void out_lo(void)
-{
- NEXT_KBD_OUT_PORT &= ~(1<<NEXT_KBD_OUT_BIT);
- NEXT_KBD_OUT_DDR |= (1<<NEXT_KBD_OUT_BIT);
+static inline void out_lo(void) {
+ NEXT_KBD_OUT_PORT &= ~(1 << NEXT_KBD_OUT_BIT);
+ NEXT_KBD_OUT_DDR |= (1 << NEXT_KBD_OUT_BIT);
}
-static inline void out_hi(void)
-{
+static inline void out_hi(void) {
/* input with pull up */
- NEXT_KBD_OUT_DDR &= ~(1<<NEXT_KBD_OUT_BIT);
- NEXT_KBD_OUT_PORT |= (1<<NEXT_KBD_OUT_BIT);
+ NEXT_KBD_OUT_DDR &= ~(1 << NEXT_KBD_OUT_BIT);
+ NEXT_KBD_OUT_PORT |= (1 << NEXT_KBD_OUT_BIT);
}
-static inline void query(void)
-{
+static inline void query(void) {
out_lo_delay(5);
out_hi_delay(1);
out_lo_delay(3);
out_hi();
}
-static inline void reset(void)
-{
+static inline void reset(void) {
out_lo_delay(1);
out_hi_delay(4);
out_lo_delay(1);
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-16 17:20:55 +0000