pca9532.c

// system includes
#include "global.h"

// local includes
#include "i2c.h"
#include "pca9532.h"

// functions
void pca9532Init(u08 node)
{
    u08 packet[2];

    // reset all registers to default state
    packet[1] = 0;
    packet[0] = PCA9532_REG_LS0;
    i2cMasterSend(PCA9532_I2C_BASE_ADDR|node, 2, packet);
    packet[0] = PCA9532_REG_LS1;
    i2cMasterSend(PCA9532_I2C_BASE_ADDR|node, 2, packet);
    packet[0] = PCA9532_REG_LS2;
    i2cMasterSend(PCA9532_I2C_BASE_ADDR|node, 2, packet);
    packet[0] = PCA9532_REG_LS3;
    i2cMasterSend(PCA9532_I2C_BASE_ADDR|node, 2, packet);
    
    pca9532SetFreq(node, 0, 0);
    pca9532SetFreq(node, 1, 0);
    pca9532SetPWM(node, 0, 0);
    pca9532SetPWM(node, 1, 0);
}

void pca9532SetPinState(u08 node, u08 pin, u08 state)
{
    u08 packet[2];

    // determine the register to access
    packet[0] = PCA9532_REG_LS0+(pin/4);
    // get the current state
    i2cMasterSend(PCA9532_I2C_BASE_ADDR|node, 1, &packet[0]);
    i2cMasterReceive(PCA9532_I2C_BASE_ADDR|node, 1, &packet[1]);
    // clear old state and set new one
    packet[1] &= ~(3<<((pin%4)*2));
    packet[1] |= state<<((pin%4)*2);
    // write back to device 
    i2cMasterSend(PCA9532_I2C_BASE_ADDR|node, 2, packet);
}

void pca9532SetFreq(u08 node, u08 ch, u08 period)
{
    u08 packet[2];
    packet[0] = PCA9532_REG_PSC0+(ch<<1);
    packet[1] = period;
    i2cMasterSend(PCA9532_I2C_BASE_ADDR|node, 2, packet);
}

void pca9532SetPWM(u08 node, u08 ch, u08 duty)
{
    u08 packet[2];
    packet[0] = PCA9532_REG_PWM0+(ch<<1);
    packet[1] = duty;
    i2cMasterSend(PCA9532_I2C_BASE_ADDR|node, 2, packet);
}

u16 pca9532GetInput(u08 node)
{
    return 0;
}

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