File content as of revision 1:b924729b5734:

#include "mbed.h"
#include "hl_bertl_portex.h"

PortEx::PortEx() :
    _i2c(p28,p27), _p6Event(p6)
{
    btns=btnEvent=0;
    useISR = 1;
}

void PortEx::Init()
{
    char cmd[4];
    _i2c.frequency(100000);
    wait(0.01);
    // Port0 Config  Port0 Out    Port1 In
    cmd[0]=0x06;
    cmd[1]=0x00;
    cmd[2]=0xFF;
    _i2c.write(DEV, cmd, 3, false);
    SetLedPort(0);
    _p6Event.fall(this, &PortEx::p6ISR);
}

void PortEx::p6ISR()
{
    if( !useISR )
        return;
    int16_t prev = btns;
    ReadButtons();
    if( !btns )
        btns = prev;
    else
        btnEvent = 1;
}

void PortEx::SetLedPort(uint8_t aBitPattern)
{
    char cmd[4];
    cmd[0]=2;
    cmd[1]=~aBitPattern;
    _i2c.write(DEV, cmd, 2, false);
}

void PortEx::SetLeds(uint8_t aBitPattern)
{
    _currLeds |= aBitPattern;
    SetLedPort(_currLeds);
}

void PortEx::ToggleLeds(uint8_t aBitPattern)
{
    _currLeds ^= aBitPattern;
    SetLedPort(_currLeds);
}

void PortEx::ClearLeds()
{
    _currLeds=0;
    SetLedPort(0);
}


void PortEx::ReadButtons()
{
    char cmd[4];
    cmd[0]=1;
    _i2c.write(DEV, cmd, 1, true);
    _i2c.read(DEV|1, cmd, 1, false);
    btns = cmd[0];
}

void PortEx::WaitUntilButtonPressed()
{
    int prev = useISR;
    useISR = 0;
    btns = 0;
    while(1) {
        ReadButtons();
        if( btns )
            break;
        wait(0.01);
    }
    btns=btnEvent=0;
    useISR = prev;
}

void PortEx::WaitUntilFrontButtonPressed()
{
    int prev = useISR;
    useISR = 0;
    btns = 0;
    while(1) {
        ReadButtons();
        if( IsAnyFrontButton() )
            break;
        wait(0.01);
    }
    btns=btnEvent=0;
    useISR = prev;
}