I2C PWM expander added from different Project

2024-11-16 16:42:29 +01:00
parent deccb3186c
commit f6608075ff
7 changed files with 327 additions and 0 deletions
@@ -0,0 +1,74 @@
+/**
+ * @file i2cPort.cpp
+ * @author Gustice
+ * @brief C++ Wrapper for I2C-interface
+ *
+ * @copyright Copyright (c) 2020
+ */
+
+#include "i2cPort.hpp"
+#include "esp_log.h"
+
+const int TxBufDisabled = 0; /*!< I2C master doesn't need buffer */
+const int RxBufDisabled = 0; /*!< I2C master doesn't need buffer */
+constexpr int I2C_TOOL_TIMEOUT_VALUE_MS = 50;
+
+#define ACK_CHECK_EN 0x1  /*!< I2C master will check ack from slave*/
+#define ACK_CHECK_DIS 0x0 /*!< I2C master will not check ack from slave */
+
+I2cMaster::I2cMaster(i2c_port_t port, gpio_num_t sda, gpio_num_t scl) : Port(port) {
+    i2c_master_bus_config_t i2c_bus_config{
+        .i2c_port = port,
+        .sda_io_num = sda,
+        .scl_io_num = scl,
+        .clk_source = I2C_CLK_SRC_DEFAULT,
+        .glitch_ignore_cnt = 7,
+    };
+    i2c_bus_config.flags.enable_internal_pullup = 1;
+    ESP_ERROR_CHECK(i2c_new_master_bus(&i2c_bus_config, &_busHandle));
+}
+
+bool I2cMaster::probe(uint8_t addr) {
+    esp_err_t ret = i2c_master_probe(_busHandle, addr, I2C_TOOL_TIMEOUT_VALUE_MS);
+    return ret == ESP_OK;
+}
+
+I2cMaster::Slave::Slave(I2cMaster &interface, uint8_t addr, ClockRate rate) : Addr(addr), Interface(interface) {
+    i2c_device_config_t i2c_dev_conf{
+        .device_address = addr,
+        .scl_speed_hz = rate,
+    };
+    ESP_ERROR_CHECK(i2c_master_bus_add_device(interface._busHandle, &i2c_dev_conf, &_devHandle));
+}
+
+I2cMaster::Slave::~Slave() {
+    i2c_master_bus_rm_device(_devHandle);
+}
+
+bool I2cMaster::Slave::writeTo(const std::vector<uint8_t> &data) {
+    esp_err_t ret = i2c_master_transmit(_devHandle, data.data(), data.size(), I2C_TOOL_TIMEOUT_VALUE_MS);
+    if (ret != ESP_OK) {
+        if (ret == ESP_ERR_TIMEOUT) {
+            ESP_LOGW("I2C", "Bus is busy");
+        }
+        return false;
+    }
+    return true;
+}
+std::vector<uint8_t> I2cMaster::Slave::readFrom(const std::vector<uint8_t> &address, unsigned size) {
+    if (size == 0) {
+        return {};
+    }
+    std::vector<uint8_t> buffer(size);
+    esp_err_t ret = i2c_master_transmit_receive(_devHandle, address.data(), address.size(), buffer.data(), buffer.size(), I2C_TOOL_TIMEOUT_VALUE_MS);
+
+    if (ret != ESP_OK) {
+        if (ret == ESP_ERR_TIMEOUT) {
+            ESP_LOGW("I2C", "Bus is busy");
+        }
+        return {};
+    }
+    return buffer;
+}
+
+constexpr int DisableBuffer = 0; /*!< I2C master doesn't need buffers */