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https://github.com/skot/ESP-Miner.git
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90 lines
2.8 KiB
C
90 lines
2.8 KiB
C
#include "driver/i2c.h"
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#include "esp_log.h"
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#include <stdio.h>
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#include "EMC2302.h"
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#define I2C_MASTER_SCL_IO 48 /*!< GPIO number used for I2C master clock */
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#define I2C_MASTER_SDA_IO 47 /*!< GPIO number used for I2C master data */
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#define I2C_MASTER_NUM \
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0 /*!< I2C master i2c port number, the number of i2c peripheral interfaces available will depend on the chip */
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#define I2C_MASTER_FREQ_HZ 400000 /*!< I2C master clock frequency */
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#define I2C_MASTER_TX_BUF_DISABLE 0 /*!< I2C master doesn't need buffer */
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#define I2C_MASTER_RX_BUF_DISABLE 0 /*!< I2C master doesn't need buffer */
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#define I2C_MASTER_TIMEOUT_MS 1000
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static const char *TAG = "EMC2302.c";
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/**
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* @brief Read a sequence of I2C bytes
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*/
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static esp_err_t register_read(uint8_t reg_addr, uint8_t * data, size_t len)
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{
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return i2c_master_write_read_device(I2C_MASTER_NUM, EMC2302_I2CADDR_DEFAULT, ®_addr, 1, data, len,
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I2C_MASTER_TIMEOUT_MS / portTICK_PERIOD_MS);
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}
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/**
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* @brief Write a byte to a I2C register
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*/
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static esp_err_t register_write_byte(uint8_t reg_addr, uint8_t data)
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{
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int ret;
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uint8_t write_buf[2] = {reg_addr, data};
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ret = i2c_master_write_to_device(I2C_MASTER_NUM, EMC2302_I2CADDR_DEFAULT, write_buf, sizeof(write_buf),
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I2C_MASTER_TIMEOUT_MS / portTICK_PERIOD_MS);
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return ret;
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}
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// run this first. sets up the PWM polarity register
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void EMC2302_init(bool invertPolarity)
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{
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if (invertPolarity) {
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ESP_ERROR_CHECK(register_write_byte(EMC2302_PWM_POLARITY, 0b00011111));
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}
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}
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// Sets the fan speed to a given percent
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void EMC2302_set_fan_speed(uint8_t devicenum, float percent)
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{
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uint8_t speed;
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uint8_t FAN_SETTING_REG = EMC2302_FAN1_SETTING + (devicenum * 0x10);
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speed = (uint8_t) (63.0 * percent);
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ESP_ERROR_CHECK(register_write_byte(FAN_SETTING_REG, speed));
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}
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// Gets the fan speed
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uint16_t EMC2302_get_fan_speed(uint8_t devicenum)
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{
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uint8_t tach_lsb, tach_msb;
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uint16_t RPM;
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uint8_t TACH_LSB_REG = EMC2302_TACH1_LSB + (devicenum * 0x10);
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uint8_t TACH_MSB_REG = EMC2302_TACH1_MSB + (devicenum * 0x10);
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ESP_ERROR_CHECK(register_read(TACH_LSB_REG, &tach_lsb, 1));
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ESP_ERROR_CHECK(register_read(TACH_MSB_REG, &tach_msb, 1));
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ESP_LOGI(TAG, "Raw Fan Speed[%d] = %02X %02X", devicenum, tach_msb, tach_lsb);
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RPM = (tach_msb << 5) + ((tach_lsb >> 3) & 0x1F);
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ESP_LOGI(TAG, "Fan Speed[%d] = %d RPM", devicenum, RPM);
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return RPM;
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}
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float EMC2302_get_external_temp(void)
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{
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// We don't have temperature on this chip, so fake it
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return 0;
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}
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uint8_t EMC2302_get_internal_temp(void)
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{
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// We don't have temperature on this chip, so fake it
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return 0;
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}
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