Control a Microchip MCP4724 DAC

RE: Control a Microchip MCP4724 DAC

V.Lorz — Thu, 22 Jun 2023 09:19:28 GMT

Relating to this subject, see a working solution in: devzone.nordicsemi.com/.../how-to-interface-with-an-mcp4725-on-a-custom-board-based-on-the-nrf52832-soc .

RE: Control a Microchip MCP4724 DAC

V.Lorz — Wed, 07 Jun 2023 13:59:24 GMT

At the end, for no apparent reason, the error disappeared after I restarted VSC, made the n-th pristine build, and restarted VSC and made another pristine build.

RE: Control a Microchip MCP4724 DAC

V.Lorz — Tue, 06 Jun 2023 13:54:22 GMT

Any thoughts about this?

RE: Control a Microchip MCP4724 DAC

V.Lorz — Mon, 05 Jun 2023 13:31:28 GMT

Hi,

Only devices I have enabled are i2c0, gpio and adc.

Just to make sure the hardware is working OK, I included this code:

{

static const struct i2c_dt_spec i2c_dev = I2C_DT_SPEC_GET(I2C_NODE);
if (!device_is_ready(i2c_dev.bus))
{
printk("I2C bus %s is not ready!\n\r", i2c_dev.bus->name);
return false;
}

uint8_t buf[5];

memset(&buf, 0, sizeof(buf));
i2c_read_dt(&i2c_dev, buf, 2);

}

And the CPU outputs the i2c signals as expected, and the MCP4725 does not ack the read, just as, I think, expected.

This is what I have in my .prj (last line is highlighted as error, and says: CONFIG_DAC_MCP4725 was assigned the value y, but got the value n. Missing dependencies:
DT_HAS_MICROCHIP_MCP4725_ENABLED)

CONFIG_GPIO=y
CONFIG_NFCT_PINS_AS_GPIOS=y
CONFIG_I2C=y
CONFIG_PINCTRL=y
CONFIG_DAC=y
CONFIG_DAC_MCP4725=y

RE: Control a Microchip MCP4724 DAC

Øivind — Mon, 05 Jun 2023 12:28:42 GMT

Hi,

Please make sure that spi0 is disabled, as both i2c0 and spi0 can not be enabled at the same time.

Could I please see your prj.conf? Make sure that you have all of these configs:

CONFIG_I2C=y
CONFIG_DAC=y
CONFIG_DAC_MCP4725=y

Are you using uart0? In the DK board files uart0 uses P0.06 and P0.07 by default, so if you are using uart0 make sure that you have changed these pins.