qmk_firmware

QMK firmware for my keyboards (Corne, Sweep Ferris) and trackball (Ploopy Adept)
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config.h (1330B)

      1 #pragma once
      2 
      3 
      4 #ifdef PS2_DRIVER_USART
      5 #define PS2_CLOCK_PIN   D5
      6 #define PS2_DATA_PIN    D2
      7 
      8     /* synchronous, odd parity, 1-bit stop, 8-bit data, sample at falling edge */
      9     /* set DDR of CLOCK as input to be slave */
     10     #define PS2_USART_INIT() do {   \
     11         PS2_CLOCK_DDR &= ~(1<<PS2_CLOCK_BIT);   \
     12         PS2_DATA_DDR &= ~(1<<PS2_DATA_BIT);     \
     13         UCSR1C = ((1 << UMSEL10) |  \
     14                   (3 << UPM10)   |  \
     15                   (0 << USBS1)   |  \
     16                   (3 << UCSZ10)  |  \
     17                   (0 << UCPOL1));   \
     18         UCSR1A = 0;                 \
     19         UBRR1H = 0;                 \
     20         UBRR1L = 0;                 \
     21     } while (0)
     22     #define PS2_USART_RX_INT_ON() do {  \
     23         UCSR1B = ((1 << RXCIE1) |       \
     24                   (1 << RXEN1));        \
     25     } while (0)
     26     #define PS2_USART_RX_POLL_ON() do { \
     27         UCSR1B = (1 << RXEN1);          \
     28     } while (0)
     29     #define PS2_USART_OFF() do {    \
     30         UCSR1C = 0;                 \
     31         UCSR1B &= ~((1 << RXEN1) |  \
     32                     (1 << TXEN1));  \
     33     } while (0)
     34     #define PS2_USART_RX_READY      (UCSR1A & (1<<RXC1))
     35     #define PS2_USART_RX_DATA       UDR1
     36     #define PS2_USART_ERROR         (UCSR1A & ((1<<FE1) | (1<<DOR1) | (1<<UPE1)))
     37     #define PS2_USART_RX_VECT       USART1_RX_vect
     38 #endif