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mirror of https://github.com/jscrane/r65emu.git synced 2024-07-17 08:28:59 +00:00

minor kbd changes

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

View File

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

View File

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

View File

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