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path: root/drivers/gpio/pca9555.c
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Diffstat (limited to 'drivers/gpio/pca9555.c')
-rw-r--r--drivers/gpio/pca9555.c61
1 files changed, 36 insertions, 25 deletions
diff --git a/drivers/gpio/pca9555.c b/drivers/gpio/pca9555.c
index 02b5abbdde..adcd040083 100644
--- a/drivers/gpio/pca9555.c
+++ b/drivers/gpio/pca9555.c
@@ -1,18 +1,6 @@
-/* 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/>.
- */
+// Copyright 2020 zvecr<git@zvecr.com>
+// SPDX-License-Identifier: GPL-2.0-or-later
+
#include "i2c_master.h"
#include "pca9555.h"
@@ -45,39 +33,59 @@ void pca9555_init(uint8_t slave_addr) {
// i2c_stop();
}
-void pca9555_set_config(uint8_t slave_addr, uint8_t port, uint8_t conf) {
+bool pca9555_set_config(uint8_t slave_addr, pca9555_port_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");
+ return false;
}
+
+ return true;
}
-void pca9555_set_output(uint8_t slave_addr, uint8_t port, uint8_t conf) {
+bool pca9555_set_output(uint8_t slave_addr, pca9555_port_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");
+ return false;
}
+
+ return true;
}
-uint8_t pca9555_readPins(uint8_t slave_addr, uint8_t port) {
+bool pca9555_set_output_all(uint8_t slave_addr, uint8_t confA, uint8_t confB) {
+ uint8_t addr = SLAVE_TO_ADDR(slave_addr);
+ uint8_t conf[2] = {confA, confB};
+
+ i2c_status_t ret = i2c_writeReg(addr, CMD_OUTPUT_0, &conf[0], sizeof(conf), TIMEOUT);
+ if (ret != I2C_STATUS_SUCCESS) {
+ dprintf("pca9555_set_output::FAILED::%u\n", ret);
+ return false;
+ }
+
+ return true;
+}
+
+bool pca9555_readPins(uint8_t slave_addr, pca9555_port_t port, uint8_t* out) {
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);
+ i2c_status_t ret = i2c_readReg(addr, cmd, out, sizeof(uint8_t), TIMEOUT);
if (ret != I2C_STATUS_SUCCESS) {
print("pca9555_readPins::FAILED\n");
+ return false;
}
- return data;
+
+ return true;
}
-uint16_t pca9555_readAllPins(uint8_t slave_addr) {
+bool pca9555_readPins_all(uint8_t slave_addr, uint16_t* out) {
uint8_t addr = SLAVE_TO_ADDR(slave_addr);
typedef union {
@@ -85,11 +93,14 @@ uint16_t pca9555_readAllPins(uint8_t slave_addr) {
uint16_t u16;
} data16;
- data16 data;
+ data16 data = {.u16 = 0};
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");
+ print("pca9555_readPins_all::FAILED\n");
+ return false;
}
- return data.u16;
+
+ *out = data.u16;
+ return true;
}