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qmk_firmware

custom branch of QMK firmware git clone https://anongit.hacktivis.me/git/qmk_firmware.git

sx60.c (808B)

    

  1. #include "sx60.h"
  2. #include "i2c_master.h"
  5. bool i2c_initialized = 0;
  6. uint8_t mcp23018_status = 0x20;
  8. uint8_t init_mcp23018(void) {
  9.     mcp23018_status = 0x20;
  11.     /* I2C subsystem */
  13.     if (i2c_initialized == 0) {
  14.         i2c_init();  // on pins D(1,0)
  15.         i2c_initialized = true;
  16.         _delay_ms(1000);
  17.     }
  19.     /* B Pins are Row, A pins are Columns 
  20.        Set them to output */
  21.     static uint8_t direction[2] = {
  22.         0b11111111,
  23.         0b00000000,
  24.     };
  25.     static uint8_t pullup[2] = {
  26.         0b11111111,
  27.         0b00000000,
  28.     };
  30.     mcp23018_status = i2c_write_register(I2C_ADDR, IODIRA, direction, 2, I2C_TIMEOUT);
  31.     if (mcp23018_status) return mcp23018_status;
  33.     mcp23018_status = i2c_write_register(I2C_ADDR, GPPUA, pullup, 2, I2C_TIMEOUT);
  34.     return mcp23018_status;
  35. }