General I2C questions

[MaBecker]

On my way to implement a CST816S i2c touch device for a custom board.

Is there a implementation like function I2C.readReg(address, reg, quantity) we can use in c instead of a jsi2cWrite() used with jsi2cRead()

#define CST816S_ID 0x15

unsigned char buf[6];
uint8_t version;
// read version
    buf[0] = 0x15; jsi2cWrite(&jswrap_touch_init, CST816S_ID, 1, buf, true);
    // wait 100ms
    jshDelayMicroseconds(100*1000); // we should really have a callback
    jsi2cRead(&jswrap_touch_init, CST816S_ID, 1, &version, true);

[SimonGAndrews]

There may be some ideas here.
This link
And the supporting module http://www.espruino.com/modules/PCA9685.js have some examples of setting up a device via its registers. That may help.

[SimonGAndrews]

But your probably familiar with those @MaBecker ??

[MaBecker]

Thanks for picking this up. Yes
This a question about firmware code in c.