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samples: i2c_scanner: provide more complete output

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Update the sample to indicate which device it was using, which helps
mitigate the existing problems identifyin Arduino I2C buses.  Also
output a summary of results so cases where no devices are found
provide output after the Starting... line.

Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
This commit is contained in:
Peter Bigot 2019-11-12 05:53:32 -06:00 • committed by Anas Nashif
commit a9d58e8c5c
1 changed files with 5 additions and 1 deletions
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6
samples/drivers/i2c_scanner/src/main.c
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@ -23,12 +23,13 @@
void main(void)
{
struct device *i2c_dev;
u8_t cnt = 0;
printk("Starting i2c scanner...\n");
i2c_dev = device_get_binding(I2C_DEV);
if (!i2c_dev) {
printk("I2C: Device driver not found.\n");
printk("I2C: Device driver %s not found.\n", I2C_DEV);
return;
}
@ -43,6 +44,9 @@ void main(void)
if (i2c_transfer(i2c_dev, &msgs[0], 1, i) == 0) {
printk("0x%2x FOUND\n", i);
++cnt;
}
}
printk("%u devices found on %s\n", cnt, I2C_DEV);
}