mirror of
https://github.com/Keychron/qmk_firmware.git
synced 2024-11-23 00:47:02 +06:00
e9bd7d7ad3
* remove i2c_start and i2c_stop from i2c drivers * remove static i2c_address variable from chibios i2c driver
70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
/* Copyright 2019 Neil Kettle
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "sp64.h"
|
|
|
|
#ifdef RIGHT_HALF
|
|
bool i2c_initialized = 0;
|
|
i2c_status_t mcp23018_status = I2C_STATUS_ERROR;
|
|
|
|
uint8_t init_mcp23018(void)
|
|
{
|
|
uint8_t data[3];
|
|
mcp23018_status = I2C_STATUS_ERROR;
|
|
|
|
// I2C subsystem
|
|
if (i2c_initialized == 0) {
|
|
i2c_init(); // on pins D(1,0)
|
|
i2c_initialized = true;
|
|
_delay_ms(1000);
|
|
}
|
|
|
|
// set pin direction
|
|
// - unused : input : 1
|
|
// - input : input : 1
|
|
// - driving : output :
|
|
data[0] = IODIRA;
|
|
data[1] = 0b00000000;
|
|
data[2] = 0b11111111;
|
|
mcp23018_status = i2c_transmit(I2C_ADDR, (uint8_t *)data, 3, MCP23018_I2C_TIMEOUT);
|
|
if (mcp23018_status != I2C_STATUS_SUCCESS)
|
|
goto out;
|
|
|
|
// set pull-up
|
|
// - unused : on : 1
|
|
// - input : on : 1
|
|
// - driving : off : 0
|
|
data[0] = GPPUA;
|
|
data[1] = 0b00000000;
|
|
data[2] = 0b11111111;
|
|
mcp23018_status = i2c_transmit(I2C_ADDR, (uint8_t *)data, 3, MCP23018_I2C_TIMEOUT);
|
|
if (mcp23018_status != I2C_STATUS_SUCCESS)
|
|
goto out;
|
|
|
|
// set logical value (doesn't matter on inputs)
|
|
// - unused : hi-Z : 1
|
|
// - input : hi-Z : 1
|
|
// - driving : hi-Z : 1
|
|
data[0] = OLATA;
|
|
data[1] = 0b11111111;
|
|
data[2] = 0b11111111;
|
|
mcp23018_status = i2c_transmit(I2C_ADDR, (uint8_t *)data, 3, MCP23018_I2C_TIMEOUT);
|
|
|
|
out:
|
|
return (mcp23018_status);
|
|
}
|
|
#endif
|