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I2C bus upgrade (#432)

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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
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29
extras/mcp4725/mcp4725.c
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@ -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);
}