167 lines
3.7 KiB
C
167 lines
3.7 KiB
C
// Copyright 2022 nirim000
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include "i2c_master.h"
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#include "pca9505.h"
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#include "debug.h"
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#define SLAVE_TO_ADDR(n) (n << 1)
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#define TIMEOUT 100
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enum {
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CMD_INPUT_0 = 0,
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CMD_INPUT_1,
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CMD_INPUT_2,
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CMD_INPUT_3,
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CMD_INPUT_4,
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CMD_OUTPUT_0 = 8,
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CMD_OUTPUT_1,
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CMD_OUTPUT_2,
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CMD_OUTPUT_3,
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CMD_OUTPUT_4,
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CMD_INVERSION_0 = 16,
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CMD_INVERSION_1,
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CMD_INVERSION_2,
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CMD_INVERSION_3,
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CMD_INVERSION_4,
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CMD_CONFIG_0 = 24,
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CMD_CONFIG_1,
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CMD_CONFIG_2,
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CMD_CONFIG_3,
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CMD_CONFIG_4,
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};
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void pca9505_init(uint8_t slave_addr) {
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static uint8_t s_init = 0;
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if (!s_init) {
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i2c_init();
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s_init = 1;
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}
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// TODO: could check device connected
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// i2c_start(SLAVE_TO_ADDR(slave) | I2C_WRITE);
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// i2c_stop();
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}
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bool pca9505_set_config(uint8_t slave_addr, pca9505_port_t port, uint8_t conf) {
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uint8_t addr = SLAVE_TO_ADDR(slave_addr);
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uint8_t cmd = 0;
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switch (port) {
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case 0:
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cmd = CMD_CONFIG_0;
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break;
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case 1:
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cmd = CMD_CONFIG_1;
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break;
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case 2:
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cmd = CMD_CONFIG_2;
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break;
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case 3:
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cmd = CMD_CONFIG_3;
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break;
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case 4:
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cmd = CMD_CONFIG_4;
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break;
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}
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i2c_status_t ret = i2c_writeReg(addr, cmd, &conf, sizeof(conf), TIMEOUT);
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if (ret != I2C_STATUS_SUCCESS) {
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print("pca9505_set_config::FAILED\n");
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return false;
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}
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return true;
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}
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bool pca9505_set_polarity(uint8_t slave_addr, pca9505_port_t port, uint8_t conf) {
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uint8_t addr = SLAVE_TO_ADDR(slave_addr);
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uint8_t cmd = 0;
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switch (port) {
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case 0:
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cmd = CMD_INVERSION_0;
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break;
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case 1:
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cmd = CMD_INVERSION_1;
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break;
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case 2:
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cmd = CMD_INVERSION_2;
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break;
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case 3:
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cmd = CMD_INVERSION_3;
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break;
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case 4:
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cmd = CMD_INVERSION_4;
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break;
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}
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i2c_status_t ret = i2c_writeReg(addr, cmd, &conf, sizeof(conf), TIMEOUT);
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if (ret != I2C_STATUS_SUCCESS) {
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print("pca9505_set_polarity::FAILED\n");
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return false;
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}
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return true;
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}
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bool pca9505_set_output(uint8_t slave_addr, pca9505_port_t port, uint8_t conf) {
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uint8_t addr = SLAVE_TO_ADDR(slave_addr);
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uint8_t cmd = 0;
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switch (port) {
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case 0:
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cmd = CMD_OUTPUT_0;
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break;
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case 1:
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cmd = CMD_OUTPUT_1;
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break;
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case 2:
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cmd = CMD_OUTPUT_2;
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break;
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case 3:
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cmd = CMD_OUTPUT_3;
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break;
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case 4:
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cmd = CMD_OUTPUT_4;
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break;
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}
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i2c_status_t ret = i2c_writeReg(addr, cmd, &conf, sizeof(conf), TIMEOUT);
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if (ret != I2C_STATUS_SUCCESS) {
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print("pca9505_set_output::FAILED\n");
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return false;
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}
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return true;
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}
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bool pca9505_readPins(uint8_t slave_addr, pca9505_port_t port, uint8_t* out) {
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uint8_t addr = SLAVE_TO_ADDR(slave_addr);
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uint8_t cmd = 0;
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switch (port) {
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case 0:
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cmd = CMD_INPUT_0;
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break;
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case 1:
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cmd = CMD_INPUT_1;
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break;
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case 2:
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cmd = CMD_INPUT_2;
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break;
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case 3:
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cmd = CMD_INPUT_3;
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break;
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case 4:
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cmd = CMD_INPUT_4;
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break;
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}
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i2c_status_t ret = i2c_readReg(addr, cmd, out, sizeof(uint8_t), TIMEOUT);
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if (ret != I2C_STATUS_SUCCESS) {
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print("pca9505_readPins::FAILED\n");
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return false;
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}
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return true;
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}
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