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Pca9505/6 driver (#17333)

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nirim000 2022-07-02 19:37:02 -04:00 committed by GitHub
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166
drivers/gpio/pca9505.c Normal file
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// Copyright 2022 nirim000
// SPDX-License-Identifier: GPL-2.0-or-later
#include "i2c_master.h"
#include "pca9505.h"
#include "debug.h"
#define SLAVE_TO_ADDR(n) (n << 1)
#define TIMEOUT 100
enum {
CMD_INPUT_0 = 0,
CMD_INPUT_1,
CMD_INPUT_2,
CMD_INPUT_3,
CMD_INPUT_4,
CMD_OUTPUT_0 = 8,
CMD_OUTPUT_1,
CMD_OUTPUT_2,
CMD_OUTPUT_3,
CMD_OUTPUT_4,
CMD_INVERSION_0 = 16,
CMD_INVERSION_1,
CMD_INVERSION_2,
CMD_INVERSION_3,
CMD_INVERSION_4,
CMD_CONFIG_0 = 24,
CMD_CONFIG_1,
CMD_CONFIG_2,
CMD_CONFIG_3,
CMD_CONFIG_4,
};
void pca9505_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 pca9505_set_config(uint8_t slave_addr, pca9505_port_t port, uint8_t conf) {
uint8_t addr = SLAVE_TO_ADDR(slave_addr);
uint8_t cmd = 0;
switch (port) {
case 0:
cmd = CMD_CONFIG_0;
break;
case 1:
cmd = CMD_CONFIG_1;
break;
case 2:
cmd = CMD_CONFIG_2;
break;
case 3:
cmd = CMD_CONFIG_3;
break;
case 4:
cmd = CMD_CONFIG_4;
break;
}
i2c_status_t ret = i2c_writeReg(addr, cmd, &conf, sizeof(conf), TIMEOUT);
if (ret != I2C_STATUS_SUCCESS) {
print("pca9505_set_config::FAILED\n");
return false;
}
return true;
}
bool pca9505_set_polarity(uint8_t slave_addr, pca9505_port_t port, uint8_t conf) {
uint8_t addr = SLAVE_TO_ADDR(slave_addr);
uint8_t cmd = 0;
switch (port) {
case 0:
cmd = CMD_INVERSION_0;
break;
case 1:
cmd = CMD_INVERSION_1;
break;
case 2:
cmd = CMD_INVERSION_2;
break;
case 3:
cmd = CMD_INVERSION_3;
break;
case 4:
cmd = CMD_INVERSION_4;
break;
}
i2c_status_t ret = i2c_writeReg(addr, cmd, &conf, sizeof(conf), TIMEOUT);
if (ret != I2C_STATUS_SUCCESS) {
print("pca9505_set_polarity::FAILED\n");
return false;
}
return true;
}
bool pca9505_set_output(uint8_t slave_addr, pca9505_port_t port, uint8_t conf) {
uint8_t addr = SLAVE_TO_ADDR(slave_addr);
uint8_t cmd = 0;
switch (port) {
case 0:
cmd = CMD_OUTPUT_0;
break;
case 1:
cmd = CMD_OUTPUT_1;
break;
case 2:
cmd = CMD_OUTPUT_2;
break;
case 3:
cmd = CMD_OUTPUT_3;
break;
case 4:
cmd = CMD_OUTPUT_4;
break;
}
i2c_status_t ret = i2c_writeReg(addr, cmd, &conf, sizeof(conf), TIMEOUT);
if (ret != I2C_STATUS_SUCCESS) {
print("pca9505_set_output::FAILED\n");
return false;
}
return true;
}
bool pca9505_readPins(uint8_t slave_addr, pca9505_port_t port, uint8_t* out) {
uint8_t addr = SLAVE_TO_ADDR(slave_addr);
uint8_t cmd = 0;
switch (port) {
case 0:
cmd = CMD_INPUT_0;
break;
case 1:
cmd = CMD_INPUT_1;
break;
case 2:
cmd = CMD_INPUT_2;
break;
case 3:
cmd = CMD_INPUT_3;
break;
case 4:
cmd = CMD_INPUT_4;
break;
}
i2c_status_t ret = i2c_readReg(addr, cmd, out, sizeof(uint8_t), TIMEOUT);
if (ret != I2C_STATUS_SUCCESS) {
print("pca9505_readPins::FAILED\n");
return false;
}
return true;
}

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drivers/gpio/pca9505.h Normal file
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// Copyright 2022 nirim000
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include <stdint.h>
#include <stdbool.h>
/**
* Port ID
*/
typedef enum {
PCA9505_PORT0,
PCA9505_PORT1,
PCA9505_PORT2,
PCA9505_PORT3,
PCA9505_PORT4,
} pca9505_port_t;
/**
* Helpers for set_config
*/
enum {
ALL_NORMAL = 0,
ALL_INVERTED = 0xFF,
};
/**
* Helpers for set_config
*/
enum {
ALL_OUTPUT = 0,
ALL_INPUT = 0xFF,
};
/**
* Helpers for set_output
*/
enum {
ALL_LOW = 0,
ALL_HIGH = 0xFF,
};
/**
* Init expander and any other dependent drivers
*/
void pca9505_init(uint8_t slave_addr);
/**
* Configure input/output to a given port
*/
bool pca9505_set_config(uint8_t slave_addr, pca9505_port_t port, uint8_t conf);
/**
* Configure polarity to a given port
*/
bool pca9505_set_polarity(uint8_t slave_addr, pca9505_port_t port, uint8_t conf);
/**
* Write high/low to a given port
*/
bool pca9505_set_output(uint8_t slave_addr, pca9505_port_t port, uint8_t conf);
/**
* Read state of a given port
*/
bool pca9505_readPins(uint8_t slave_addr, pca9505_port_t port, uint8_t* ret);