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New method to test RTC oscillator.

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This commit is contained in:
Martin Ling
2025-11-27 02:11:10 +00:00
parent f5e5ed5ba2
commit 23d69bf90c
6 changed files with 202 additions and 3 deletions
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105
host/libhackrf/src/hackrf.c
View File

@@ -110,6 +110,7 @@ typedef enum {
HACKRF_VENDOR_REQUEST_CLKIN_CTRL = 55,
HACKRF_VENDOR_REQUEST_READ_SELFTEST = 56,
HACKRF_VENDOR_REQUEST_READ_ADC = 57,
HACKRF_VENDOR_REQUEST_TEST_RTC_OSC = 58,
} hackrf_vendor_request;
#define USB_CONFIG_STANDARD 0x1
@@ -1245,6 +1246,110 @@ int ADDCALL hackrf_read_selftest(hackrf_device* device, hackrf_selftest* selftes
}
}
int ADDCALL hackrf_test_rtc_osc(hackrf_device* device, bool* pass)
{
USB_API_REQUIRED(device, 0x0109);
int result;
enum {
START_32KHZ_OSCILLATOR,
START_FREQ_MONITOR,
READ_FREQ_MONITOR,
STOP_32KHZ_OSCILLATOR,
} step;
// Enable 32kHz oscillator
result = libusb_control_transfer(
device->usb_device,
LIBUSB_ENDPOINT_OUT | LIBUSB_REQUEST_TYPE_VENDOR |
LIBUSB_RECIPIENT_DEVICE,
HACKRF_VENDOR_REQUEST_TEST_RTC_OSC,
0,
START_32KHZ_OSCILLATOR,
NULL,
0,
1000);
if (result < 0) {
last_libusb_error = result;
return HACKRF_ERROR_LIBUSB;
}
// Wait 1s for oscillator startup
#ifdef _WIN32
Sleep(1000);
#else
usleep(1000000);
#endif
// Start frequency monitor
result = libusb_control_transfer(
device->usb_device,
LIBUSB_ENDPOINT_OUT | LIBUSB_REQUEST_TYPE_VENDOR |
LIBUSB_RECIPIENT_DEVICE,
HACKRF_VENDOR_REQUEST_TEST_RTC_OSC,
0,
START_FREQ_MONITOR,
NULL,
0,
1000);
if (result < 0) {
last_libusb_error = result;
return HACKRF_ERROR_LIBUSB;
}
// Wait for frequency monitor result
#ifdef _WIN32
Sleep(1);
#else
usleep(1000);
#endif
// Read frequency monitor result
uint16_t count = 0;
result = libusb_control_transfer(
device->usb_device,
LIBUSB_ENDPOINT_IN | LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_RECIPIENT_DEVICE,
HACKRF_VENDOR_REQUEST_TEST_RTC_OSC,
0,
READ_FREQ_MONITOR,
(unsigned char*) &count,
sizeof(count),
1000);
if (result < sizeof(count)) {
last_libusb_error = result;
return HACKRF_ERROR_LIBUSB;
}
if (count == 1) {
// Disable 32kHz oscillator
result = libusb_control_transfer(
device->usb_device,
LIBUSB_ENDPOINT_OUT | LIBUSB_REQUEST_TYPE_VENDOR |
LIBUSB_RECIPIENT_DEVICE,
HACKRF_VENDOR_REQUEST_TEST_RTC_OSC,
0,
STOP_32KHZ_OSCILLATOR,
NULL,
0,
1000);
if (result < 0) {
last_libusb_error = result;
return HACKRF_ERROR_LIBUSB;
}
*pass = true;
} else {
*pass = false;
}
return HACKRF_SUCCESS;
}
int ADDCALL hackrf_read_adc(hackrf_device* device, uint8_t adc_channel, uint16_t* value)
{
USB_API_REQUIRED(device, 0x0109);

10
host/libhackrf/src/hackrf.h
View File

@@ -1354,6 +1354,16 @@ extern ADDAPI int ADDCALL hackrf_read_selftest(
hackrf_device* device,
hackrf_selftest* value);
/**
* Test the RTC oscillator on the device
*
* @param[in] device device to query
* @param[out] pass RTC oscillator test result
* @return @ref HACKRF_SUCCESS on success or @ref hackrf_error variant
* @ingroup debug
*/
extern ADDAPI int ADDCALL hackrf_test_rtc_osc(hackrf_device* device, bool* pass);
/**
* Read a value from an ADC channel
*