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Merge pull request #14990 from ikmdani/stm32l1_usb_enable_pullups 

Driver: USB: STM32L1: Managing internal pullups for usb enumeration
pull/15003/head
Martin Kojtal 2021-08-12 15:54:40 +01:00 committed by GitHub
parent 881b7ebed3 3e83108f1c
commit 4dd08c40f5
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 14 additions and 3 deletions
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17
targets/TARGET_STM/USBPhy_STM32.cpp
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@ -20,6 +20,9 @@
#include "USBPhyHw.h" #include "USBPhyHw.h"
#include "pinmap.h" #include "pinmap.h"
#if defined(TARGET_STM32L1) && defined(SYSCFG_PMC_USB_PU)
#include "stm32l1xx_ll_system.h"
#endif
/* endpoint conversion macros */ /* endpoint conversion macros */
#define EP_TO_LOG(ep) ((ep) & 0xF) #define EP_TO_LOG(ep) ((ep) & 0xF)
@ -189,15 +192,22 @@ USBPhyHw::~USBPhyHw()
} }
#if defined(TARGET_STM32F1) #if defined(TARGET_STM32F1) || defined(SYSCFG_PMC_USB_PU)
#include "drivers/DigitalOut.h" #include "drivers/DigitalOut.h"
void USB_reenumerate() void USB_reenumerate()
{ {
#if defined(SYSCFG_PMC_USB_PU)
// Manage internal pullups manually
LL_SYSCFG_DisableUSBPullUp();
wait_us(10000); // 10ms
LL_SYSCFG_EnableUSBPullUp();
#else
// Force USB_DP pin (with external pull up) to 0 // Force USB_DP pin (with external pull up) to 0
mbed::DigitalOut usb_dp_pin(USB_DP, 0) ; mbed::DigitalOut usb_dp_pin(USB_DP, 0) ;
wait_us(10000); // 10ms wait_us(10000); // 10ms
#endif
} }
#endif #endif
@ -282,9 +292,10 @@ void USBPhyHw::init(USBPhyEvents *events)
hpcd.Init.speed = PCD_SPEED_FULL; hpcd.Init.speed = PCD_SPEED_FULL;
__HAL_RCC_USB_CLK_ENABLE(); __HAL_RCC_USB_CLK_ENABLE();
map = PinMap_USB_FS; map = PinMap_USB_FS;
#if defined(TARGET_STM32F1) #if defined(TARGET_STM32F1) || defined(SYSCFG_PMC_USB_PU)
// USB_DevConnect is empty // USB_DevConnect is empty
USB_reenumerate(); USB_reenumerate();
#endif #endif
@ -407,7 +418,7 @@ void USBPhyHw::connect()
// Initializes the USB controller registers // Initializes the USB controller registers
USB_DevInit(hpcd.Instance, hpcd.Init); // hpcd.Init not used USB_DevInit(hpcd.Instance, hpcd.Init); // hpcd.Init not used
#if defined(TARGET_STM32F1) #if defined(TARGET_STM32F1) || defined(SYSCFG_PMC_USB_PU)
// USB_DevConnect is empty // USB_DevConnect is empty
USB_reenumerate(); USB_reenumerate();
#endif #endif