3 * This program is free software: you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License as published by
5 * the Free Software Foundation, either version 2 of the License, or
6 * (at your option) any later version.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this program. If not, see <http://www.gnu.org/licenses/>.
16 #include "i2c_master.h"
21 #define SLAVE_TO_ADDR(n) (n<<1)
35 void pca9555_init(uint8_t slave_addr) {
36 static uint8_t s_init = 0;
43 // TODO: could check device connected
44 //i2c_start(SLAVE_TO_ADDR(slave) | I2C_WRITE);
48 void pca9555_set_config(uint8_t slave_addr, uint8_t port, uint8_t conf) {
49 uint8_t addr = SLAVE_TO_ADDR(slave_addr);
50 uint8_t cmd = port ? CMD_OUTPUT_1 : CMD_OUTPUT_0;
52 i2c_status_t ret = i2c_writeReg(addr, cmd, &conf, sizeof(conf), TIMEOUT);
53 if (ret != I2C_STATUS_SUCCESS) {
54 print("pca9555_set_config::FAILED\n");
58 void pca9555_set_output(uint8_t slave_addr, uint8_t port, uint8_t conf) {
59 uint8_t addr = SLAVE_TO_ADDR(slave_addr);
60 uint8_t cmd = port ? CMD_CONFIG_1 : CMD_CONFIG_0;
62 i2c_status_t ret = i2c_writeReg(addr, cmd, &conf, sizeof(conf), TIMEOUT);
63 if (ret != I2C_STATUS_SUCCESS) {
64 print("pca9555_set_output::FAILED\n");
68 uint8_t pca9555_readPins(uint8_t slave_addr, uint8_t port) {
69 uint8_t addr = SLAVE_TO_ADDR(slave_addr);
70 uint8_t cmd = port ? CMD_INPUT_1 : CMD_INPUT_0;
73 i2c_status_t ret = i2c_readReg(addr, cmd, &data, sizeof(data), TIMEOUT);
74 if (ret != I2C_STATUS_SUCCESS) {
75 print("pca9555_readPins::FAILED\n");