j3d1/esp-open-rtos
1
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity

I2C bus upgrade (#432)

Browse source
This commit is contained in:
Zaltora 2017-09-01 06:29:32 -03:00 • committed by Ruslan V. Uss
parent d100f42b1f
commit b83c2629b9
56 changed files with 909 additions and 804 deletions
Download patch file Download diff file Expand all files Collapse all files

29
extras/mcp4725/mcp4725.c
View file

@ -6,62 +6,59 @@
* BSD Licensed as described in the file LICENSE
*/
#include "mcp4725.h"
#include <i2c/i2c.h>
#define CMD_DAC 0x40
#define CMD_EEPROM 0x60
#define BIT_READY 0x80
static void read_data(uint8_t addr, uint8_t *buf, uint8_t size)
static void read_data(i2c_dev_t* dev, uint8_t *buf, uint8_t size)
{
i2c_slave_read(addr, NULL, buf, size);
i2c_slave_read(dev->bus, dev->addr , NULL, buf, size);
}
bool mcp4725_eeprom_busy(uint8_t addr)
bool mcp4725_eeprom_busy(i2c_dev_t* dev)
{
uint8_t res;
read_data(addr, &res, 1);
read_data(dev, &res, 1);
return !(res & BIT_READY);
}
mcp4725_power_mode_t mcp4725_get_power_mode(uint8_t addr, bool eeprom)
mcp4725_power_mode_t mcp4725_get_power_mode(i2c_dev_t* dev, bool eeprom)
{
uint8_t buf[4];
read_data(addr, buf, eeprom ? 4 : 1);
read_data(dev, buf, eeprom ? 4 : 1);
return (eeprom ? buf[3] >> 5 : buf[0] >> 1) & 0x03;
}
void mcp4725_set_power_mode(uint8_t addr, mcp4725_power_mode_t mode, bool eeprom)
void mcp4725_set_power_mode(i2c_dev_t* dev, mcp4725_power_mode_t mode, bool eeprom)
{
uint16_t value = mcp4725_get_raw_output(addr, eeprom);
uint16_t value = mcp4725_get_raw_output(dev, eeprom);
uint8_t data[] = {
(eeprom ? CMD_EEPROM : CMD_DAC) | ((uint8_t)mode << 1),
value >> 4,
value << 4
};
i2c_slave_write(addr, &data[0], &data[1], 2);
i2c_slave_write(dev->bus, dev->addr, &data[0], &data[1], 2);
}
uint16_t mcp4725_get_raw_output(uint8_t addr, bool eeprom)
uint16_t mcp4725_get_raw_output(i2c_dev_t* dev, bool eeprom)
{
uint8_t buf[5];
read_data(addr, buf, eeprom ? 5 : 3);
read_data(dev, buf, eeprom ? 5 : 3);
return eeprom
? ((uint16_t)(buf[3] & 0x0f) << 8) | buf[4]
: ((uint16_t)buf[0] << 4) | (buf[1] >> 4);
}
void mcp4725_set_raw_output(uint8_t addr, uint16_t value, bool eeprom)
void mcp4725_set_raw_output(i2c_dev_t* dev, uint16_t value, bool eeprom)
{
uint8_t data[] = {
(eeprom ? CMD_EEPROM : CMD_DAC),
value >> 4,
value << 4
};
i2c_slave_write(addr, &data[0], &data[1], 2);
i2c_slave_write(dev->bus, dev->addr, &data[0], &data[1], 2);
}

19
extras/mcp4725/mcp4725.h
View file

@ -10,6 +10,7 @@
#include <stdint.h>
#include <stdbool.h>
#include <i2c/i2c.h>
#ifdef __cplusplus
extern "C"
@ -41,7 +42,7 @@ typedef enum
* @param addr Device address
* @return true when EEPROM is busy
*/
bool mcp4725_eeprom_busy(uint8_t addr);
bool mcp4725_eeprom_busy(i2c_dev_t* dev);
/**
* Get power mode
@ -49,7 +50,7 @@ bool mcp4725_eeprom_busy(uint8_t addr);
* @param eeprom Read power mode from EEPROM if true
* @return Power mode
*/
mcp4725_power_mode_t mcp4725_get_power_mode(uint8_t addr, bool eeprom);
mcp4725_power_mode_t mcp4725_get_power_mode(i2c_dev_t* dev, bool eeprom);
/**
* Set power mode
@ -57,7 +58,7 @@ mcp4725_power_mode_t mcp4725_get_power_mode(uint8_t addr, bool eeprom);
* @param mode Power mode
* @param eeprom Store mode to device EEPROM if true
*/
void mcp4725_set_power_mode(uint8_t addr, mcp4725_power_mode_t mode, bool eeprom);
void mcp4725_set_power_mode(i2c_dev_t* dev, mcp4725_power_mode_t mode, bool eeprom);
/**
* Get current DAC value
@ -65,7 +66,7 @@ void mcp4725_set_power_mode(uint8_t addr, mcp4725_power_mode_t mode, bool eeprom
* @param eeprom Read value from device EEPROM if true
* @return Raw output value, 0..4095
*/
uint16_t mcp4725_get_raw_output(uint8_t addr, bool eeprom);
uint16_t mcp4725_get_raw_output(i2c_dev_t* dev, bool eeprom);
/**
* Set DAC output value
@ -73,7 +74,7 @@ uint16_t mcp4725_get_raw_output(uint8_t addr, bool eeprom);
* @param value Raw output value, 0..4095
* @param eeprom Store value to device EEPROM if true
*/
void mcp4725_set_raw_output(uint8_t addr, uint16_t value, bool eeprom);
void mcp4725_set_raw_output(i2c_dev_t* dev, uint16_t value, bool eeprom);
/**
* Get current DAC output voltage
@ -82,9 +83,9 @@ void mcp4725_set_raw_output(uint8_t addr, uint16_t value, bool eeprom);
* @param eeprom Read voltage from device EEPROM if true
* @return Current output voltage, volts
*/
inline float mcp4725_get_voltage(uint8_t addr, float vdd, bool eeprom)
inline float mcp4725_get_voltage(i2c_dev_t* dev, float vdd, bool eeprom)
{
return vdd / MCP4725_MAX_VALUE * mcp4725_get_raw_output(addr, eeprom);
return vdd / MCP4725_MAX_VALUE * mcp4725_get_raw_output(dev, eeprom);
}
/**
@ -94,9 +95,9 @@ inline float mcp4725_get_voltage(uint8_t addr, float vdd, bool eeprom)
* @param value Output value, volts
* @param eeprom Store value to device EEPROM if true
*/
inline void mcp4725_set_voltage(uint8_t addr, float vdd, float value, bool eeprom)
inline void mcp4725_set_voltage(i2c_dev_t* dev, float vdd, float value, bool eeprom)
{
mcp4725_set_raw_output(addr, MCP4725_MAX_VALUE / vdd * value, eeprom);
mcp4725_set_raw_output(dev, MCP4725_MAX_VALUE / vdd * value, eeprom);
}
#ifdef __cplusplus