mirror of
https://github.com/qmk/qmk_firmware
synced 2024-11-16 17:04:50 +00:00
95 lines
2.6 KiB
C
95 lines
2.6 KiB
C
/* Copyright 2019
|
|
*
|
|
* 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 "i2c_master.h"
|
|
#include "pca9555.h"
|
|
|
|
#include "debug.h"
|
|
|
|
#define SLAVE_TO_ADDR(n) (n << 1)
|
|
#define TIMEOUT 100
|
|
|
|
enum {
|
|
CMD_INPUT_0 = 0,
|
|
CMD_INPUT_1,
|
|
CMD_OUTPUT_0,
|
|
CMD_OUTPUT_1,
|
|
CMD_INVERSION_0,
|
|
CMD_INVERSION_1,
|
|
CMD_CONFIG_0,
|
|
CMD_CONFIG_1,
|
|
};
|
|
|
|
void pca9555_init(uint8_t slave_addr) {
|
|
static uint8_t s_init = 0;
|
|
if (!s_init) {
|
|
i2c_init();
|
|
|
|
s_init = 1;
|
|
}
|
|
|
|
// TODO: could check device connected
|
|
// i2c_start(SLAVE_TO_ADDR(slave) | I2C_WRITE);
|
|
// i2c_stop();
|
|
}
|
|
|
|
void pca9555_set_config(uint8_t slave_addr, uint8_t port, uint8_t conf) {
|
|
uint8_t addr = SLAVE_TO_ADDR(slave_addr);
|
|
uint8_t cmd = port ? CMD_CONFIG_1 : CMD_CONFIG_0;
|
|
|
|
i2c_status_t ret = i2c_writeReg(addr, cmd, &conf, sizeof(conf), TIMEOUT);
|
|
if (ret != I2C_STATUS_SUCCESS) {
|
|
print("pca9555_set_config::FAILED\n");
|
|
}
|
|
}
|
|
|
|
void pca9555_set_output(uint8_t slave_addr, uint8_t port, uint8_t conf) {
|
|
uint8_t addr = SLAVE_TO_ADDR(slave_addr);
|
|
uint8_t cmd = port ? CMD_OUTPUT_1 : CMD_OUTPUT_0;
|
|
|
|
i2c_status_t ret = i2c_writeReg(addr, cmd, &conf, sizeof(conf), TIMEOUT);
|
|
if (ret != I2C_STATUS_SUCCESS) {
|
|
print("pca9555_set_output::FAILED\n");
|
|
}
|
|
}
|
|
|
|
uint8_t pca9555_readPins(uint8_t slave_addr, uint8_t port) {
|
|
uint8_t addr = SLAVE_TO_ADDR(slave_addr);
|
|
uint8_t cmd = port ? CMD_INPUT_1 : CMD_INPUT_0;
|
|
|
|
uint8_t data = 0;
|
|
i2c_status_t ret = i2c_readReg(addr, cmd, &data, sizeof(data), TIMEOUT);
|
|
if (ret != I2C_STATUS_SUCCESS) {
|
|
print("pca9555_readPins::FAILED\n");
|
|
}
|
|
return data;
|
|
}
|
|
|
|
uint16_t pca9555_readAllPins(uint8_t slave_addr) {
|
|
uint8_t addr = SLAVE_TO_ADDR(slave_addr);
|
|
|
|
typedef union {
|
|
uint8_t u8[2];
|
|
uint16_t u16;
|
|
} data16;
|
|
|
|
data16 data;
|
|
|
|
i2c_status_t ret = i2c_readReg(addr, CMD_INPUT_0, &data.u8[0], sizeof(data), TIMEOUT);
|
|
if (ret != I2C_STATUS_SUCCESS) {
|
|
print("pca9555_readAllPins::FAILED\n");
|
|
}
|
|
return data.u16;
|
|
}
|