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// 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
// i2c_start(SLAVE_TO_ADDR(slave) | I2C_WRITE);
// i2c_stop();
}
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;
}
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;
}
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;
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 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_readReg(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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