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Changes to the piNes driver to relect the new delayMicroseconds()

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code. Seems the old 4011 in the NES controller isn't that fast
afterall!
This commit is contained in:
Gordon Henderson 2012-08-20 11:08:34 +01:00
parent 1bb4989e11
commit fbab4b8329
1 changed files with 7 additions and 9 deletions
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16
wiringPi/piNes.c
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@ -38,6 +38,8 @@
#define NES_A 0x80 #define NES_A 0x80
#define PULSE_TIME 25
// Data to store the pins for each controller // Data to store the pins for each controller
struct nesPinsStruct struct nesPinsStruct
@ -91,10 +93,8 @@ unsigned int readNesJoystick (int joystick)
// Toggle Latch - which presents the first bit // Toggle Latch - which presents the first bit
digitalWrite (pins->lPin, HIGH) ; digitalWrite (pins->lPin, HIGH) ; delayMicroseconds (PULSE_TIME) ;
delayMicroseconds (1) ; digitalWrite (pins->lPin, LOW) ; delayMicroseconds (PULSE_TIME) ;
digitalWrite (pins->lPin, LOW) ;
delayMicroseconds (1) ;
// Read first bit // Read first bit
@ -104,12 +104,10 @@ unsigned int readNesJoystick (int joystick)
for (i = 0 ; i < 7 ; ++i) for (i = 0 ; i < 7 ; ++i)
{ {
digitalWrite (pins->cPin, HIGH) ; digitalWrite (pins->cPin, HIGH) ; delayMicroseconds (PULSE_TIME) ;
delayMicroseconds (1) ; digitalWrite (pins->cPin, LOW) ; delayMicroseconds (PULSE_TIME) ;
digitalWrite (pins->cPin, LOW) ;
delayMicroseconds (1) ;
value = (value << 1) | digitalRead (pins->dPin) ; value = (value << 1) | digitalRead (pins->dPin) ;
} }
return ~value ; return value ^ 0xFF ;
} }