149 lines
3.7 KiB
C
149 lines
3.7 KiB
C
#include "tca9535.h"
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#include "iic.h"
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#include "esp_log.h"
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static const char *TAG = "TCA9535";
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esp_err_t tca9535_read_reg(uint8_t reg, uint8_t *val)
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{
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if (val == NULL) {
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return ESP_ERR_INVALID_ARG;
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}
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return iic_read_reg(TCA9535_ADDRESS, reg, val, 1);
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}
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esp_err_t tca9535_write_reg(uint8_t reg, uint8_t val)
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{
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unsigned char buf[2] = {reg, val};
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return iic_send_bytes(TCA9535_ADDRESS, buf, 2);
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}
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esp_err_t tca9535_set_dir(uint16_t dir)
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{
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esp_err_t ret = tca9535_write_reg(TCA9535_REG_CONFIG0, (uint8_t)(dir & 0xFF));
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if (ret != ESP_OK) {
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return ret;
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}
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return tca9535_write_reg(TCA9535_REG_CONFIG1, (uint8_t)(dir >> 8));
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}
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esp_err_t tca9535_set_output(uint16_t val)
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{
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esp_err_t ret = tca9535_write_reg(TCA9535_REG_OUTPUT0, (uint8_t)(val & 0xFF));
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if (ret != ESP_OK) {
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return ret;
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}
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return tca9535_write_reg(TCA9535_REG_OUTPUT1, (uint8_t)(val >> 8));
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}
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esp_err_t tca9535_get_output(uint16_t *val)
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{
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if (val == NULL) {
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return ESP_ERR_INVALID_ARG;
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}
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uint8_t p0 = 0, p1 = 0;
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esp_err_t ret = tca9535_read_reg(TCA9535_REG_OUTPUT0, &p0);
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if (ret != ESP_OK) {
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return ret;
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}
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ret = tca9535_read_reg(TCA9535_REG_OUTPUT1, &p1);
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if (ret != ESP_OK) {
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return ret;
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}
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*val = (uint16_t)p0 | ((uint16_t)p1 << 8);
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return ESP_OK;
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}
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esp_err_t tca9535_get_input(uint16_t *val)
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{
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if (val == NULL) {
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return ESP_ERR_INVALID_ARG;
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}
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uint8_t p0 = 0, p1 = 0;
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esp_err_t ret = tca9535_read_reg(TCA9535_REG_INPUT0, &p0);
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if (ret != ESP_OK) {
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return ret;
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}
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ret = tca9535_read_reg(TCA9535_REG_INPUT1, &p1);
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if (ret != ESP_OK) {
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return ret;
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}
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*val = (uint16_t)p0 | ((uint16_t)p1 << 8);
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return ESP_OK;
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}
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esp_err_t tca9535_pin_mode(uint8_t pin, uint8_t mode)
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{
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if (pin >= TCA9535_PIN_COUNT) {
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return ESP_ERR_INVALID_ARG;
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}
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uint8_t reg = (pin < 8) ? TCA9535_REG_CONFIG0 : TCA9535_REG_CONFIG1;
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uint8_t bit = pin & 0x07;
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uint8_t cur = 0;
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esp_err_t ret = tca9535_read_reg(reg, &cur);
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if (ret != ESP_OK) {
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return ret;
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}
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if (mode == TCA9535_INPUT) {
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cur |= (1 << bit);
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} else {
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cur &= ~(1 << bit);
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}
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return tca9535_write_reg(reg, cur);
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}
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esp_err_t tca9535_digital_write(uint8_t pin, uint8_t val)
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{
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if (pin >= TCA9535_PIN_COUNT) {
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return ESP_ERR_INVALID_ARG;
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}
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uint8_t reg = (pin < 8) ? TCA9535_REG_OUTPUT0 : TCA9535_REG_OUTPUT1;
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uint8_t bit = pin & 0x07;
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uint8_t cur = 0;
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esp_err_t ret = tca9535_read_reg(reg, &cur);
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if (ret != ESP_OK) {
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return ret;
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}
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if (val) {
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cur |= (1 << bit);
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} else {
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cur &= ~(1 << bit);
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}
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return tca9535_write_reg(reg, cur);
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}
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esp_err_t tca9535_digital_read(uint8_t pin, uint8_t *val)
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{
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if (pin >= TCA9535_PIN_COUNT || val == NULL) {
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return ESP_ERR_INVALID_ARG;
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}
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uint8_t reg = (pin < 8) ? TCA9535_REG_INPUT0 : TCA9535_REG_INPUT1;
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uint8_t bit = pin & 0x07;
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uint8_t cur = 0;
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esp_err_t ret = tca9535_read_reg(reg, &cur);
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if (ret != ESP_OK) {
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return ret;
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}
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*val = (cur >> bit) & 0x01;
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return ESP_OK;
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}
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esp_err_t tca9535_init(void)
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{
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esp_err_t ret = tca9535_write_reg(TCA9535_REG_POLARITY0, 0x00);
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if (ret != ESP_OK) {
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ESP_LOGE(TAG, "TCA9535初始化失败");
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return ret;
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}
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tca9535_write_reg(TCA9535_REG_POLARITY1, 0x00);
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tca9535_write_reg(TCA9535_REG_OUTPUT0, 0x00);
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tca9535_write_reg(TCA9535_REG_OUTPUT1, 0x00);
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ret = tca9535_set_dir(0xFFFF);
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if (ret != ESP_OK) {
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ESP_LOGE(TAG, "TCA9535初始化失败");
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return ret;
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}
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ESP_LOGI(TAG, "TCA9535初始化成功, 地址0x%02X", TCA9535_ADDRESS);
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return ESP_OK;
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}
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