Hi
I am currently trying to create ADC and BLE Services using nrf5340 DK for evaluation before jump to custom board. So based on several threads in this forum, I found this is the simplest tutorial and I think adc almost work (not works yet). .
As you can see below is some of my code and configratuin that I create for firmwre.
---------------------- app.overlay
&adc {
status = "okay";
label = "ADC_0";
};
/ {
zephyr,user {
io-channels = <&adc 1>, <&adc 1>, <&adc 2>, <&adc 3>;
};
chosen {
nordic,nus-uart = &uart0;
};
};
---------------------- prj.conf
# ADC Configuration CONFIG_ADC=y CONFIG_CBPRINTF_FP_SUPPORT=y CONFIG_ADC_ASYNC=y CONFIG_ADC_NRFX_SAADC=y
----------------------- m_1st_channel_cfg
static const struct adc_channel_cfg m_1st_channel_cfg = {
.gain = ADC_GAIN,
.reference = ADC_REFERENCE,
.acquisition_time = ADC_ACQUISITION_TIME,
.channel_id = ADC_1ST_CHANNEL_ID,
#if defined(CONFIG_ADC_CONFIGURABLE_INPUTS)
.input_positive = ADC_1ST_CHANNEL_INPUT,
#endif
};
---------------------- ADC Initializarion Part in main.c
LOG_INF("Initialize ADC");
adc_dev = device_get_binding("ADC_0");
if (!adc_dev) {
LOG_ERR("device_get_binding ADC_0 failed\n");
} else {LOG_INF("success");}
LOG_INF("Initialize channel 0 ");
err = adc_channel_setup(adc_dev, &m_1st_channel_cfg);
if (err) {
LOG_ERR("Error in adc channel 0 setup: %d\n", err);
k_sleep(K_MSEC(100));
} else {LOG_INF("success");}
---------------------- read_adc_channel functions
static int read_adc_channel(uint8_t adc_channel)
{
int ret;
LOG_INF("Reading channel %d", adc_channel);
if (adc_channel == 0) {
const struct adc_sequence sequence = {
.options = &sequence_opts,
.channels = BIT(ADC_1ST_CHANNEL_ID),
.buffer = m_sample_buffer,
.buffer_size = sizeof(m_sample_buffer),
.resolution = ADC_RESOLUTION,
};
ret = adc_read(adc_dev, &sequence);
}
if (!adc_dev) {
LOG_ERR("Error on reading ADC");
return -1;
}
LOG_INF("\n Measured voltage: ");
for (int i = 0; i < BUFFER_SIZE; i++) {
float adc_voltage = 0;
adc_voltage = (float)(((float)m_sample_buffer[i] / 1023.0f) *
3600.0f);
LOG_INF("%f ",adc_voltage);
}
LOG_INF("\n");
LOG_INF("Done reading ADC");
return ret;
}
---------------------- main loop in main.c
for (;;) {
k_sleep(K_MSEC(100));
if (responding == 0) {
char idle_msg[4] = {'test'};
bt_service_send(NULL, idle_msg, sizeof(idle_msg));
responding = -1;
} else if (responding == 1) {
send_dummy_data();
// for (int i = 0; i < 4; i++) {
// read_adc_channel(i);
// send_channel_data();
// }
responding = -1;
} else if (responding == 2) {
read_adc_channel(0); // read channel 0
responding = -1;
} else if (responding == 3) {
// read_adc_channel(1);
responding = -1;
} else if (responding == 4) {
// read_adc_channel(2);
responding = -1;
} else if (responding == 5) {
// read_adc_channel(3);
responding = -1;
}
}
And below is the result for that view using RTT Jlink
<inf> peripheral_uart: Init fw [00:00:00.257,415] <inf> peripheral_uart: Initializing BT [00:00:00.262,969] <inf> fs_nvs: 2 Sectors of 4096 bytes [00:00:00.262,969] <inf> fs_nvs: alloc wra: 0, fc8 [00:00:00.263,000] <inf> fs_nvs: data wra: 0, 2c [00:00:00.283,569] <inf> bt_hci_core: No ID address. App must call settings_load() [00:00:00.283,569] <inf> peripheral_uart: success [00:00:00.283,599] <inf> peripheral_uart: Initializing Settings [00:00:00.284,637] <inf> peripheral_uart: Initializing BUS BLE [00:00:00.284,637] <inf> peripheral_uart: success [00:00:00.284,667] <inf> peripheral_uart: Advertizing BLE [00:00:00.287,048] <inf> peripheral_uart: success [00:00:00.287,048] <inf> peripheral_uart: Initialize ADC [00:00:00.287,078] <inf> peripheral_uart: success [00:00:00.287,078] <inf> peripheral_uart: Initialize channel 0 [00:00:00.287,109] <err> [00:01:31.649,993] <inf> peripheral_uart: Connected 65:FD:AF:5C:6C:C3 (random) [00:01:42.755,645] <inf> peripheral_uart: Received data from: 65:FD:AF:5C:6C:C3 (random) [00:01:49.360,748] <inf> peripheral_uart: Reading channel 0 [00:01:49.360,778] <err> adc_nrfx_saadc: Channel 0 not configured [00:01:49.360,778] <inf> peripheral_uart: Measured voltage: [00:01:49.360,809] <inf> peripheral_uart: 0.000000 [00:01:49.360,809] <inf> peripheral_uart: [00:01:49.360,839] <inf> peripheral_uart: Done reading ADC
So I think the issue was from err = adc_channel_setup(adc_dev, &m_1st_channel_cfg); but on RTT Viewer, I can't check the error number, it only prints err without let me know the error number. Anybody have idea about this? Thank you.
