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Fixing USB send rate.

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- Only send USB events when something changes (rather than every ms)
This commit is contained in:
Jacob Alexander 2014-09-19 19:11:37 -07:00
parent 9b1e19017f
commit 97b514a9d4
3 changed files with 21 additions and 1 deletions
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19
Output/pjrcUSB/output_com.c
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@ -89,6 +89,10 @@ volatile uint8_t USBKeys_LEDs = 0;
// 1 - NKRO Mode
volatile uint8_t USBKeys_Protocol = 1;
// Indicate if USB should send update
// OS only needs update if there has been a change in state
uint8_t USBKeys_Changed = 0;
// the idle configuration, how often we send the report to the
// host (ms * 4) even when it hasn't changed
uint8_t USBKeys_Idle_Config = 125;
@ -111,6 +115,10 @@ void Output_usbCodeSend_capability( uint8_t state, uint8_t stateType, uint8_t *a
}
// TODO Analog inputs
// Only indicate USB has changed if either a press or release has occured
if ( state == 0x01 || state == 0x03 )
USBKeys_Changed = 1;
// Only send keypresses if press or hold state
if ( stateType == 0x00 && state == 0x03 ) // Release state
return;
@ -164,6 +172,17 @@ inline void Output_setup()
// USB Data Send
inline void Output_send(void)
{
// Don't send update if USB has not changed
if ( !USBKeys_Changed )
{
// Clear modifiers and keys
USBKeys_Modifiers = 0;
USBKeys_Sent = 0;
return;
}
USBKeys_Changed = 0;
// TODO undo potentially old keys
for ( uint8_t c = USBKeys_Sent; c < USBKeys_MaxSize; c++ )
USBKeys_Array[c] = 0;

1
Output/pjrcUSB/output_com.h
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@ -47,6 +47,7 @@ extern uint8_t USBKeys_Modifiers;
extern uint8_t USBKeys_Array[USB_MAX_KEY_SEND];
extern uint8_t USBKeys_Sent;
extern volatile uint8_t USBKeys_LEDs;
extern uint8_t USBKeys_Changed;
static const uint8_t USBKeys_MaxSize = USB_MAX_KEY_SEND;
extern volatile uint8_t USBKeys_Protocol; // 0 - Boot Mode, 1 - NKRO Mode