Alex Graham

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6 years, 3 months ago.

DigitalOut with PCA9675

Hello,

I am trying to simply set my PCA9675 ports to a digital output 0 (0V) or 1 (3.3V) as if I was using the function "DigitalOut" for the mbedLPC1768. I can´t seem to do this, I keep getting 4.9V through all the ports on my PCA all the time. I have attached code below. Any suggestions are appreciated thank you.

  1. include "mbed.h"
  2. include "misra_types.h"
  3. include "PCA9675.h"
  1. define PCA9675_BASE_BOARD_SLAVE_ADDRESS 0x20

I2C CNTRL_i2c(p9, p10); PCA9675 BaseBoardLatch(&CNTRL_i2c, PCA9675_BASE_BOARD_SLAVE_ADDRESS);

int main() {

uint8_t port0_payload = 0x00; uint8_t port1_payload = 0x00; CNTRL_i2c.frequency(400000);

BaseBoardLatch.init(port0_payload, port1_payload);

while(1) { BaseBoardLatch.write_data(0xff, port1_payload); wait(2); BaseBoardLatch.write_data(0x00, port1_payload); wait(2); } }

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