v2n-temp-sensor

TMP112 temperature-sensor read loop on V2N's BRD_I2C. Reads the chip every second and prints the result in millicelsius.

Source: examples/v2n/v2n-temp-sensor/.

board.yaml

schema_version: 2

som:
  sku: E1M-V2N101

carrier:
  name: E1M-X-EVK

cores:
  m33_sm:
    os: zephyr
    app: ./src
    peripherals: [i2c]

chips:
  - tmp112

diagnostics:
  log_level: info

Source (abbreviated)

#include <alp/peripheral.h>
#include <alp/chips/tmp112.h>
#include <alp/e1m_pinout.h>

int main(void) {
    alp_i2c_t *bus = alp_i2c_open(&(alp_i2c_config_t){
        .bus_id     = E1M_I2C0,
        .bitrate_hz = 400000u,
    });
    if (bus == NULL) return -1;

    tmp112_t sensor;
    if (tmp112_init(&sensor, bus, 0x40) != ALP_OK) {
        printk("[tmp112] init failed\n");
        return -1;
    }

    for (int i = 0; i < 10; i++) {
        int32_t mC;
        if (tmp112_read_mC(&sensor, &mC) == ALP_OK) {
            printk("[tmp112] %d.%03d C\n", mC / 1000, abs(mC % 1000));
        }
        k_msleep(1000);
    }
    alp_i2c_close(bus);
    return 0;
}

See also

• <alp/chips/tmp112.h>
• Examples overview