USB device stack with Nucleo F401RE support. NOTE: the default clock config needs to be changed to in order for USB to work.
Fork of USBDevice by
Slightly modified original USBDevice library to support F401RE.
On F401RE the data pins of your USB connector should be attached to PA12 (D+) and PA11(D-). It is also required to connect the +5V USB line to PA9.
F401RE requires 48MHz clock for USB. Therefore in order for this to work you will need to change the default clock settings:
Clock settings for USB
#include "stm32f4xx_hal.h" RCC_OscInitTypeDef RCC_OscInitStruct; RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI; RCC_OscInitStruct.HSIState = RCC_HSI_ON; RCC_OscInitStruct.HSICalibrationValue = 16; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI; RCC_OscInitStruct.PLL.PLLM = 16; RCC_OscInitStruct.PLL.PLLN = 336; RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV4; RCC_OscInitStruct.PLL.PLLQ = 7; if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { error("RTC error: LSI clock initialization failed."); }
NOTE: Changing the clock frequency might affect the behavior of other libraries. I only tested the Serial library.
UPDATE: Clock settings should not to be changed anymore! Looks like the newer mbed library has the required clock enabled.
Diff: USBAudio/USBAudio.cpp
- Revision:
- 11:eeb3cbbaa996
- Parent:
- 1:80ab0d068708
--- a/USBAudio/USBAudio.cpp Thu May 30 17:16:57 2013 +0100 +++ b/USBAudio/USBAudio.cpp Mon Aug 05 14:13:36 2013 +0300 @@ -400,8 +400,8 @@ MSB(TERMINAL_USB_STREAMING), // wTerminalType 0x00, // bAssocTerminal channel_nb_in, // bNrChannels - LSB(channel_config_in), // wChannelConfig - MSB(channel_config_in), // wChannelConfig + (uint8_t)(LSB(channel_config_in)), // wChannelConfig + (uint8_t)(MSB(channel_config_in)), // wChannelConfig 0x00, // iChannelNames 0x00, // iTerminal @@ -438,8 +438,8 @@ MSB(TERMINAL_MICROPHONE), // wTerminalType 0x00, // bAssocTerminal channel_nb_out, // bNrChannels - LSB(channel_config_out), // wChannelConfig - MSB(channel_config_out), // wChannelConfig + (uint8_t)(LSB(channel_config_out)), // wChannelConfig + (uint8_t)(MSB(channel_config_out)), // wChannelConfig 0x00, // iChannelNames 0x00, // iTerminal @@ -499,17 +499,17 @@ 0x02, // bSubFrameSize 16, // bBitResolution 0x01, // bSamFreqType - LSB(FREQ_IN), // tSamFreq - (FREQ_IN >> 8) & 0xff, // tSamFreq - (FREQ_IN >> 16) & 0xff, // tSamFreq + (uint8_t)(LSB(FREQ_IN)), // tSamFreq + (uint8_t)((FREQ_IN >> 8) & 0xff), // tSamFreq + (uint8_t)((FREQ_IN >> 16) & 0xff), // tSamFreq // Endpoint - Standard Descriptor ENDPOINT_DESCRIPTOR_LENGTH + 2, // bLength ENDPOINT_DESCRIPTOR, // bDescriptorType PHY_TO_DESC(EPISO_OUT), // bEndpointAddress E_ISOCHRONOUS, // bmAttributes - LSB(PACKET_SIZE_ISO_IN), // wMaxPacketSize - MSB(PACKET_SIZE_ISO_IN), // wMaxPacketSize + (uint8_t)(LSB(PACKET_SIZE_ISO_IN)), // wMaxPacketSize + (uint8_t)(MSB(PACKET_SIZE_ISO_IN)), // wMaxPacketSize 0x01, // bInterval 0x00, // bRefresh 0x00, // bSynchAddress @@ -569,17 +569,17 @@ 0x02, // bSubFrameSize 0x10, // bBitResolution 0x01, // bSamFreqType - LSB(FREQ_OUT), // tSamFreq - (FREQ_OUT >> 8) & 0xff, // tSamFreq - (FREQ_OUT >> 16) & 0xff, // tSamFreq + (uint8_t)(LSB(FREQ_OUT)), // tSamFreq + (uint8_t)((FREQ_OUT >> 8) & 0xff), // tSamFreq + (uint8_t)((FREQ_OUT >> 16) & 0xff), // tSamFreq // Endpoint - Standard Descriptor ENDPOINT_DESCRIPTOR_LENGTH + 2, // bLength ENDPOINT_DESCRIPTOR, // bDescriptorType PHY_TO_DESC(EPISO_IN), // bEndpointAddress E_ISOCHRONOUS, // bmAttributes - LSB(PACKET_SIZE_ISO_OUT), // wMaxPacketSize - MSB(PACKET_SIZE_ISO_OUT), // wMaxPacketSize + (uint8_t)(LSB(PACKET_SIZE_ISO_OUT)), // wMaxPacketSize + (uint8_t)(MSB(PACKET_SIZE_ISO_OUT)), // wMaxPacketSize 0x01, // bInterval 0x00, // bRefresh 0x00, // bSynchAddress