|
|
- // 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
- }
-
- 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_write_register(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_write_register(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_write_register(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_read_register(addr, cmd, out, sizeof(uint8_t), TIMEOUT);
- if (ret != I2C_STATUS_SUCCESS) {
- print("pca9505_readPins::FAILED\n");
- return false;
- }
-
- return true;
- }
|