- // Copyright 2020 zvecr<git@zvecr.com>
- // SPDX-License-Identifier: GPL-2.0-or-later
-
- #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
- }
-
- 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_write_register(addr, cmd, &conf, sizeof(conf), TIMEOUT);
- if (ret != I2C_STATUS_SUCCESS) {
- print("pca9555_set_config::FAILED\n");
- return false;
- }
-
- return true;
- }
-
- 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_write_register(addr, cmd, &conf, sizeof(conf), TIMEOUT);
- if (ret != I2C_STATUS_SUCCESS) {
- print("pca9555_set_output::FAILED\n");
- return false;
- }
-
- return true;
- }
-
- 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_write_register(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;
-
- i2c_status_t ret = i2c_read_register(addr, cmd, out, sizeof(uint8_t), TIMEOUT);
- if (ret != I2C_STATUS_SUCCESS) {
- print("pca9555_readPins::FAILED\n");
- return false;
- }
-
- return true;
- }
-
- bool pca9555_readPins_all(uint8_t slave_addr, uint16_t* out) {
- uint8_t addr = SLAVE_TO_ADDR(slave_addr);
-
- typedef union {
- uint8_t u8[2];
- uint16_t u16;
- } data16;
-
- data16 data = {.u16 = 0};
-
- i2c_status_t ret = i2c_read_register(addr, CMD_INPUT_0, &data.u8[0], sizeof(data), TIMEOUT);
- if (ret != I2C_STATUS_SUCCESS) {
- print("pca9555_readPins_all::FAILED\n");
- return false;
- }
-
- *out = data.u16;
- return true;
- }
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