Hi everyone,
I am able to program the STUSB4500 using the RedBoard and the SetParameters example from Arduino.
I can easily change the voltage using SetVoltage(). I have a small USBC voltmeter from which I can read Voltage and Current.
However, the setCurrent() doesn’t seem to work.
#include <Wire.h>
#include <SparkFun_STUSB4500.h>
STUSB4500 usb;
void setup()
{
Serial.begin(115200);
Wire.begin(); //Join I2C bus
delay(500);
if(!usb.begin())
{
Serial.println("Cannot connect to STUSB4500.");
Serial.println("Is the board connected? Is the device ID correct?");
while(1);
}
Serial.println("Connected to STUSB4500!");
delay(100);
usb.setPdoNumber(3);
/* PDO1
- Voltage fixed at 5V
- Current value for PDO1 0-5A, if 0 used, FLEX_I value is used
- Under Voltage Lock Out (setUnderVoltageLimit) fixed at 3.3V
- Over Voltage Lock Out (setUpperVoltageLimit) 5-20%
*/
usb.setCurrent(1,2);
usb.setUpperVoltageLimit(1,20);
usb.setReqSrcCurrent(5);
/* PDO2
- Voltage 5-20V
- Current value for PDO2 0-5A, if 0 used, FLEX_I value is used
- Under Voltage Lock Out (setUnderVoltageLimit) 5-20%
- Over Voltage Lock Out (setUpperVoltageLimit) 5-20%
*/
usb.setVoltage(2,15.0);
usb.setCurrent(2,1);
usb.setLowerVoltageLimit(2,5);
usb.setUpperVoltageLimit(2,20);
/* PDO3
- Voltage 5-20V
- Current value for PDO3 0-5A, if 0 used, FLEX_I value is used
- Under Voltage Lock Out (setUnderVoltageLimit) 5-20%
- Over Voltage Lock Out (setUpperVoltageLimit) 5-20%
*/
usb.setVoltage(3,9.0);
usb.setCurrent(3,0.5);
usb.setLowerVoltageLimit(3,5);
usb.setUpperVoltageLimit(3,20);
/* Flexible current value common to all PDOs */
usb.setFlexCurrent(1.0);
/* Unconstrained Power bit setting in capabilities message sent by the sink */
usb.setExternalPower(false);
/* USB 2.0 or 3.x data communication capability by sink system */
usb.setUsbCommCapable(false);
/* Selects POWER_OK pins configuration
0 - Configuration 1
1 - No applicable
2 - Configuration 2 (default)
3 - Configuration 3
*/
usb.setConfigOkGpio(2);
/* Selects GPIO pin configuration
0 - SW_CTRL_GPIO
1 - ERROR_RECOVERY
2 - DEBUG
3 - SINK_POWER
*/
usb.setGpioCtrl(3);
usb.setPowerAbove5vOnly(false);
usb.setReqSrcCurrent(false);
usb.write();
usb.read();
Serial.println("New Parameters:\n");
/* Read the Power Data Objects (PDO) highest priority */
Serial.print("PDO Number: ");
Serial.println(usb.getPdoNumber());
/* Read settings for PDO1 */
Serial.println();
Serial.print("Voltage1 (V): ");
Serial.println(usb.getVoltage(1));
Serial.print("Current1 (A): ");
Serial.println(usb.getCurrent(1));
Serial.print("Lower Voltage Tolerance1 (%): ");
Serial.println(usb.getLowerVoltageLimit(1));
Serial.print("Upper Voltage Tolerance1 (%): ");
Serial.println(usb.getUpperVoltageLimit(1));
Serial.println();
/* Read settings for PDO2 */
Serial.print("Voltage2 (V): ");
Serial.println(usb.getVoltage(2));
Serial.print("Current2 (A): ");
Serial.println(usb.getCurrent(2));
Serial.print("Lower Voltage Tolerance2 (%): ");
Serial.println(usb.getLowerVoltageLimit(2));
Serial.print("Upper Voltage Tolerance2 (%): ");
Serial.println(usb.getUpperVoltageLimit(2));
Serial.println();
/* Read settings for PDO3 */
Serial.print("Voltage3 (V): ");
Serial.println(usb.getVoltage(3));
Serial.print("Current3 (A): ");
Serial.println(usb.getCurrent(3));
Serial.print("Lower Voltage Tolerance3 (%): ");
Serial.println(usb.getLowerVoltageLimit(3));
Serial.print("Upper Voltage Tolerance3 (%): ");
Serial.println(usb.getUpperVoltageLimit(3));
Serial.println();
/* Read the flex current value */
Serial.print("Flex Current: ");
Serial.println(usb.getFlexCurrent());
/* Read the External Power capable bit */
Serial.print("External Power: ");
Serial.println(usb.getExternalPower());
/* Read the USB Communication capable bit */
Serial.print("USB Communication Capable: ");
Serial.println(usb.getUsbCommCapable());
/* Read the POWER_OK pins configuration */
Serial.print("Configuration OK GPIO: ");
Serial.println(usb.getConfigOkGpio());
/* Read the GPIO pin configuration */
Serial.print("GPIO Control: ");
Serial.println(usb.getGpioCtrl());
/* Read the bit that enables VBUS_EN_SNK pin only when power is greater than 5V */
Serial.print("Enable Power Only Above 5V: ");
Serial.println(usb.getPowerAbove5vOnly());
/* Read bit that controls if the Source or Sink device's
operating current is used in the RDO message */
Serial.print("Request Source Current: ");
Serial.println(usb.getReqSrcCurrent());
}
void loop()
{
}
