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authorJoel Challis <git@zvecr.com>2019-11-16 00:07:21 +0000
committerGitHub <noreply@github.com>2019-11-16 00:07:21 +0000
commitb94f6cb116f1628f6d14ff3b1365bcbae6792dea (patch)
treefb717e936be5bf344733771674e236f4bd00bc0f /keyboards/crkbd/rev1/split_util.c
parent0f0c73f14a8ffb83a79b51582c0e7465c2411749 (diff)
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Port SPLIT_USB_DETECT to crkbd (#7195)
Diffstat (limited to 'keyboards/crkbd/rev1/split_util.c')
-rw-r--r--keyboards/crkbd/rev1/split_util.c82
1 files changed, 61 insertions, 21 deletions
diff --git a/keyboards/crkbd/rev1/split_util.c b/keyboards/crkbd/rev1/split_util.c
index e1ff8b437..c0d44af29 100644
--- a/keyboards/crkbd/rev1/split_util.c
+++ b/keyboards/crkbd/rev1/split_util.c
@@ -7,6 +7,11 @@
#include "split_util.h"
#include "matrix.h"
#include "keyboard.h"
+#include "wait.h"
+
+#ifdef EE_HANDS
+# include "eeconfig.h"
+#endif
#ifdef USE_MATRIX_I2C
# include "i2c.h"
@@ -14,19 +19,59 @@
# include "split_scomm.h"
#endif
+#ifndef SPLIT_USB_TIMEOUT
+# define SPLIT_USB_TIMEOUT 2500
+#endif
+
volatile bool isLeftHand = true;
-static void setup_handedness(void) {
- #ifdef EE_HANDS
- isLeftHand = eeprom_read_byte(EECONFIG_HANDEDNESS);
- #else
- // I2C_MASTER_RIGHT is deprecated, use MASTER_RIGHT instead, since this works for both serial and i2c
- #if defined(I2C_MASTER_RIGHT) || defined(MASTER_RIGHT)
- isLeftHand = !has_usb();
- #else
- isLeftHand = has_usb();
- #endif
- #endif
+bool waitForUsb(void) {
+ for (uint8_t i = 0; i < (SPLIT_USB_TIMEOUT / 100); i++) {
+ // This will return true of a USB connection has been established
+ if (UDADDR & _BV(ADDEN)) {
+ return true;
+ }
+ wait_ms(100);
+ }
+
+ // Avoid NO_USB_STARTUP_CHECK - Disable USB as the previous checks seem to enable it somehow
+ (USBCON &= ~(_BV(USBE) | _BV(OTGPADE)));
+
+ return false;
+}
+
+__attribute__((weak)) bool is_keyboard_left(void) {
+#if defined(SPLIT_HAND_PIN)
+ // Test pin SPLIT_HAND_PIN for High/Low, if low it's right hand
+ setPinInput(SPLIT_HAND_PIN);
+ return readPin(SPLIT_HAND_PIN);
+#elif defined(EE_HANDS)
+ return eeconfig_read_handedness();
+#elif defined(MASTER_RIGHT)
+ return !is_keyboard_master();
+#endif
+
+ return is_keyboard_master();
+}
+
+__attribute__((weak)) bool is_keyboard_master(void) {
+ static enum { UNKNOWN, MASTER, SLAVE } usbstate = UNKNOWN;
+
+ // only check once, as this is called often
+ if (usbstate == UNKNOWN) {
+#if defined(SPLIT_USB_DETECT)
+ usbstate = waitForUsb() ? MASTER : SLAVE;
+#elif defined(__AVR__)
+ USBCON |= (1 << OTGPADE); // enables VBUS pad
+ wait_us(5);
+
+ usbstate = (USBSTA & (1 << VBUS)) ? MASTER : SLAVE; // checks state of VBUS
+#else
+ usbstate = MASTER;
+#endif
+ }
+
+ return (usbstate == MASTER);
}
static void keyboard_master_setup(void) {
@@ -47,14 +92,9 @@ static void keyboard_slave_setup(void) {
#endif
}
-bool has_usb(void) {
- USBCON |= (1 << OTGPADE); //enables VBUS pad
- _delay_us(5);
- return (USBSTA & (1<<VBUS)); //checks state of VBUS
-}
-
+// this code runs before the usb and keyboard is initialized
void split_keyboard_setup(void) {
- setup_handedness();
+ isLeftHand = is_keyboard_left();
if (has_usb()) {
keyboard_master_setup();
@@ -64,7 +104,7 @@ void split_keyboard_setup(void) {
sei();
}
-// this code runs before the usb and keyboard is initialized
-void matrix_setup(void) {
- split_keyboard_setup();
+// backwards compat
+bool has_usb(void) {
+ return is_keyboard_master();
}