Hi all,
I have a custom device, based on Nucleo-L432KC. No external crystals. I use PlatformIO for development, stm32duino framework. Also, I know USB is working on the board, when I reset the board with Boot0=High, the device is successfully registered in Win10. Also, I can download code with st-link, and blinking the LED's is working fine.
If however my code runs, Win10 shows an invalid USB device, I cannot read the device descriptors. Have tried anything I can in the platformio.ini file, but ran out of ideas. Any help is highly appreciated!
I do not have an original Nucleo board to check if the code is working there. I wonder if the internal USB clocks are setup correctly, unfortunately I do not know how I could check.
Here my file:
Code: Select all
[env:genericSTM32L432]
platform = ststm32
board = nucleo_l432kc
framework = arduino
upload_protocol = stlink
build_flags =
-D PIO_FRAMEWORK_ARDUINO_ENABLE_CDC
-D USBCON
;-D USBD_VID=0x0483
;-D USBD_PID=0x5740
;-D USB_MANUFACTURER="unknown"
;-D USB_PRODUCT="\"Test"\"
;-D HAL_PCD_MODULE_ENABLED
;-Os
lib_deps =
bblanchon/ArduinoJson @ ^6.17.2
sandeepmistry/LoRa @ ^0.8.0
rweather/Crypto @ ^0.2.0
by fpiSTM » Wed Jan 27, 2021 3:07 pm
You point the right thing, the default clock config does not enable the USB clock.
You can easily redefine it as it is a weak function, the next core release will include all USB config by default, you can try this one. Pay attention it assume you have a LSE.:
Code: Select all
extern "C" void SystemClock_Config(void)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct = {};
RCC_OscInitTypeDef RCC_OscInitStruct = {};
RCC_PeriphCLKInitTypeDef PeriphClkInit = {};
/* MSI is enabled after System reset, activate PLL with MSI as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE | RCC_OSCILLATORTYPE_MSI;
RCC_OscInitStruct.LSEState = RCC_LSE_ON;
RCC_OscInitStruct.MSIState = RCC_MSI_ON;
RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_6;
RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_MSI;
RCC_OscInitStruct.PLL.PLLM = 1;
RCC_OscInitStruct.PLL.PLLN = 40;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV7;
RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
Error_Handler();
}
/* Initializes the CPU, AHB and APB buses clocks */
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
| RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK) {
Error_Handler();
}
PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USB;
PeriphClkInit.UsbClockSelection = RCC_USBCLKSOURCE_PLLSAI1;
PeriphClkInit.PLLSAI1.PLLSAI1Source = RCC_PLLSOURCE_MSI;
PeriphClkInit.PLLSAI1.PLLSAI1M = 1;
PeriphClkInit.PLLSAI1.PLLSAI1N = 24;
PeriphClkInit.PLLSAI1.PLLSAI1P = RCC_PLLP_DIV7;
PeriphClkInit.PLLSAI1.PLLSAI1Q = RCC_PLLQ_DIV2;
PeriphClkInit.PLLSAI1.PLLSAI1R = RCC_PLLR_DIV2;
PeriphClkInit.PLLSAI1.PLLSAI1ClockOut = RCC_PLLSAI1_48M2CLK;
if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK) {
Error_Handler();
}
/* Configure the main internal regulator output voltage */
if (HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1) != HAL_OK) {
Error_Handler();
}
/* Enable MSI Auto calibration through LSE*/
HAL_RCCEx_EnableMSIPLLMode();
}
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