A few addition to PS2 documentation.
This commit is contained in:
Priyadi Iman Nurcahyo
parent
bf23ac96f6
commit
f837406ace
146
readme.md
146
readme.md
|
|
@ -1160,41 +1160,131 @@ Please note the USB port can only supply a limited amount of power to the keyboa
|
|||
## PS/2 Mouse Support
|
||||
|
||||
Its possible to hook up a PS/2 mouse (for example touchpads or trackpoints) to your keyboard as a composite device.
|
||||
In order to do this you must first enable the option in your Makefile.
|
||||
|
||||
PS2_MOUSE_ENABLE = yes
|
||||
Then, decide whether to use USART (best), interrupts (better) or busywait (not recommended), and enable the relevant option.
|
||||
|
||||
Then, decide whether to use interrupts (better if your microcontroller supports them) or busywait, and enable the relevant option.
|
||||
### Busywait version
|
||||
|
||||
PS2_USE_INT = yes
|
||||
// PS2_USE_BUSYWAIT = yes
|
||||
Note: This is not recommended, you may encounter jerky movement or unsent inputs. Please use interrupt or USART version if possible.
|
||||
|
||||
If you're using a teensy and have hooked up the clock on your PS/2 device to D1 and the data to D0, you're all set.
|
||||
Otherwise, you will need to update the following defines in your `config.h`:
|
||||
|
||||
#define PS2_CLOCK_PORT PORTD
|
||||
#define PS2_CLOCK_PIN PIND
|
||||
#define PS2_CLOCK_DDR DDRD
|
||||
#define PS2_CLOCK_BIT 1
|
||||
In rules.mk:
|
||||
|
||||
#define PS2_DATA_PORT PORTD
|
||||
#define PS2_DATA_PIN PIND
|
||||
#define PS2_DATA_DDR DDRD
|
||||
#define PS2_DATA_BIT 0
|
||||
```
|
||||
PS2_MOUSE_ENABLE = yes
|
||||
PS2_USE_BUSYWAIT = yes
|
||||
```
|
||||
|
||||
And with `PS2_USE_INT` also define these macros:
|
||||
In your keyboard config.h:
|
||||
|
||||
#define PS2_INT_INIT() do { \
|
||||
EICRA |= ((1<<ISC11) | \
|
||||
(0<<ISC10)); \
|
||||
} while (0)
|
||||
#define PS2_INT_ON() do { \
|
||||
EIMSK |= (1<<INT1); \
|
||||
} while (0)
|
||||
#define PS2_INT_OFF() do { \
|
||||
EIMSK &= ~(1<<INT1); \
|
||||
} while (0)
|
||||
#define PS2_INT_VECT INT1_vect
|
||||
```
|
||||
#ifdef PS2_USE_BUSYWAIT
|
||||
# define PS2_CLOCK_PORT PORTD
|
||||
# define PS2_CLOCK_PIN PIND
|
||||
# define PS2_CLOCK_DDR DDRD
|
||||
# define PS2_CLOCK_BIT 1
|
||||
# define PS2_DATA_PORT PORTD
|
||||
# define PS2_DATA_PIN PIND
|
||||
# define PS2_DATA_DDR DDRD
|
||||
# define PS2_DATA_BIT 2
|
||||
#endif
|
||||
```
|
||||
|
||||
### Interrupt version
|
||||
|
||||
The following example uses D2 for clock and D5 for data. You can use any INT or PCINT pin for clock, and any pin for data.
|
||||
|
||||
In rules.mk:
|
||||
|
||||
```
|
||||
PS2_MOUSE_ENABLE = yes
|
||||
PS2_USE_INT = yes
|
||||
```
|
||||
|
||||
In your keyboard config.h:
|
||||
|
||||
```
|
||||
#ifdef PS2_USE_INT
|
||||
#define PS2_CLOCK_PORT PORTD
|
||||
#define PS2_CLOCK_PIN PIND
|
||||
#define PS2_CLOCK_DDR DDRD
|
||||
#define PS2_CLOCK_BIT 2
|
||||
#define PS2_DATA_PORT PORTD
|
||||
#define PS2_DATA_PIN PIND
|
||||
#define PS2_DATA_DDR DDRD
|
||||
#define PS2_DATA_BIT 5
|
||||
|
||||
#define PS2_INT_INIT() do { \
|
||||
EICRA |= ((1<<ISC21) | \
|
||||
(0<<ISC20)); \
|
||||
} while (0)
|
||||
#define PS2_INT_ON() do { \
|
||||
EIMSK |= (1<<INT2); \
|
||||
} while (0)
|
||||
#define PS2_INT_OFF() do { \
|
||||
EIMSK &= ~(1<<INT2); \
|
||||
} while (0)
|
||||
#define PS2_INT_VECT INT2_vect
|
||||
#endif
|
||||
```
|
||||
|
||||
### USART version
|
||||
|
||||
To use USART on the ATMega32u4, you have to use PD5 for clock and PD2 for data. If one of those are unavailable, you need to use interrupt version.
|
||||
|
||||
In rules.mk:
|
||||
|
||||
```
|
||||
PS2_MOUSE_ENABLE = yes
|
||||
PS2_USE_USART = yes
|
||||
```
|
||||
|
||||
In your keyboard config.h:
|
||||
|
||||
```
|
||||
#ifdef PS2_USE_USART
|
||||
#define PS2_CLOCK_PORT PORTD
|
||||
#define PS2_CLOCK_PIN PIND
|
||||
#define PS2_CLOCK_DDR DDRD
|
||||
#define PS2_CLOCK_BIT 5
|
||||
#define PS2_DATA_PORT PORTD
|
||||
#define PS2_DATA_PIN PIND
|
||||
#define PS2_DATA_DDR DDRD
|
||||
#define PS2_DATA_BIT 2
|
||||
|
||||
/* synchronous, odd parity, 1-bit stop, 8-bit data, sample at falling edge */
|
||||
/* set DDR of CLOCK as input to be slave */
|
||||
#define PS2_USART_INIT() do { \
|
||||
PS2_CLOCK_DDR &= ~(1<<PS2_CLOCK_BIT); \
|
||||
PS2_DATA_DDR &= ~(1<<PS2_DATA_BIT); \
|
||||
UCSR1C = ((1 << UMSEL10) | \
|
||||
(3 << UPM10) | \
|
||||
(0 << USBS1) | \
|
||||
(3 << UCSZ10) | \
|
||||
(0 << UCPOL1)); \
|
||||
UCSR1A = 0; \
|
||||
UBRR1H = 0; \
|
||||
UBRR1L = 0; \
|
||||
} while (0)
|
||||
#define PS2_USART_RX_INT_ON() do { \
|
||||
UCSR1B = ((1 << RXCIE1) | \
|
||||
(1 << RXEN1)); \
|
||||
} while (0)
|
||||
#define PS2_USART_RX_POLL_ON() do { \
|
||||
UCSR1B = (1 << RXEN1); \
|
||||
} while (0)
|
||||
#define PS2_USART_OFF() do { \
|
||||
UCSR1C = 0; \
|
||||
UCSR1B &= ~((1 << RXEN1) | \
|
||||
(1 << TXEN1)); \
|
||||
} while (0)
|
||||
#define PS2_USART_RX_READY (UCSR1A & (1<<RXC1))
|
||||
#define PS2_USART_RX_DATA UDR1
|
||||
#define PS2_USART_ERROR (UCSR1A & ((1<<FE1) | (1<<DOR1) | (1<<UPE1)))
|
||||
#define PS2_USART_RX_VECT USART1_RX_vect
|
||||
#endif
|
||||
#endif
|
||||
#endif
|
||||
```
|
||||
|
||||
## Safety Considerations
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue