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minor kbd changes

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This commit is contained in:
Stephen Crane 2014-12-15 14:36:52 +00:00
parent 50110b3525
commit f8371e10df
3 changed files with 83 additions and 54 deletions
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4
keyboard.h
View File

@ -7,10 +7,10 @@ public:
virtual void down(byte) = 0; virtual void down(byte) = 0;
virtual void reset() = 0; virtual void reset() = 0;
inline bool isshift(byte scan) { static inline bool isshift(byte scan) {
return scan == 0x12 || scan == 0x59; return scan == 0x12 || scan == 0x59;
} }
inline bool isctrl(byte scan) { static inline bool isctrl(byte scan) {
return scan == 0x14; return scan == 0x14;
} }
}; };

129
ps2drv.cpp
View File

@ -10,72 +10,97 @@ static uint8_t DataPin;
// The ISR for the external interrupt // The ISR for the external interrupt
void ps2interrupt(void) void ps2interrupt(void)
{ {
static uint8_t bitcount=0; static uint8_t bitcount=0;
static uint8_t incoming=0; static uint8_t incoming=0;
static uint32_t prev_ms=0; static uint32_t prev_ms=0;
uint32_t now_ms; uint32_t now_ms;
uint8_t n, val; uint8_t n, val;
val = digitalRead(DataPin); val = digitalRead(DataPin);
now_ms = millis(); now_ms = millis();
if (now_ms - prev_ms > 250) { if (now_ms - prev_ms > 250) {
bitcount = 0; bitcount = 0;
incoming = 0; incoming = 0;
} }
prev_ms = now_ms; prev_ms = now_ms;
n = bitcount - 1; n = bitcount - 1;
if (n <= 7) { if (n <= 7) {
incoming |= (val << n); incoming |= (val << n);
} }
bitcount++; bitcount++;
if (bitcount == 11) { if (bitcount == 11) {
uint8_t i = head + 1; uint8_t i = head + 1;
if (i == BUFFER_SIZE) i = 0; if (i == BUFFER_SIZE) i = 0;
if (i != tail) { if (i != tail) {
buffer[i] = incoming; buffer[i] = incoming;
head = i; head = i;
} }
bitcount = 0; bitcount = 0;
incoming = 0; incoming = 0;
} }
} }
bool PS2Driver::available() { bool PS2Driver::available() {
if (head == tail) if (head == tail)
return false; return false;
uint8_t i = tail+1; uint8_t i = tail+1;
if (i == BUFFER_SIZE) i = 0; if (i == BUFFER_SIZE) i = 0;
if (buffer[i] == 0xf0) if (buffer[i] == 0xf0)
return i != head; return i != head;
return true; return true;
} }
bool PS2Driver::isbreak() { bool PS2Driver::isbreak() {
bool b = isbrk; bool b = isbrk;
isbrk = false; isbrk = false;
return b; return b;
} }
int PS2Driver::read() { int PS2Driver::read() {
if (head == tail) if (head == tail)
return -1; return -1;
uint8_t i = tail+1; uint8_t i = tail+1;
if (i == BUFFER_SIZE) i = 0; if (i == BUFFER_SIZE) i = 0;
tail = i; tail = i;
if (buffer[i] == 0xf0) { if (buffer[i] == 0xf0) {
isbrk = true; isbrk = true;
return read(); return read();
} }
return buffer[i]; return buffer[i];
}
unsigned PS2Driver::read2() {
if (head == tail)
return 0;
uint8_t i = tail+1;
if (i == BUFFER_SIZE) i = 0;
tail = i;
if (buffer[i] != 0xf0)
return buffer[i];
return 0x0100 | read2();
}
unsigned PS2Driver::peek() {
if (head == tail)
return 0;
uint8_t i = tail+1;
if (i == BUFFER_SIZE) i = 0;
if (buffer[i] == 0xf0) {
if (++i == BUFFER_SIZE) i = 0;
return 0x0100 | buffer[i];
}
return buffer[i];
} }
void PS2Driver::begin(uint8_t data_pin, uint8_t irq_pin) void PS2Driver::begin(uint8_t data_pin, uint8_t irq_pin)
{ {
DataPin = data_pin; DataPin = data_pin;
pinMode(irq_pin, INPUT_PULLUP); pinMode(irq_pin, INPUT_PULLUP);
pinMode(data_pin, INPUT_PULLUP); pinMode(data_pin, INPUT_PULLUP);
attachInterrupt(irq_pin, ps2interrupt, FALLING); attachInterrupt(irq_pin, ps2interrupt, FALLING);
head = tail = 0; head = tail = 0;
} }

4
ps2drv.h
View File

@ -28,6 +28,10 @@ public:
* If there is no char available, -1 is returned. * If there is no char available, -1 is returned.
*/ */
int read(); int read();
unsigned peek();
unsigned read2();
}; };
#define PS2_F1 0x05 #define PS2_F1 0x05