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Fixed USB for STM32C0xx (for HAL conf v9 and RT conf v8)

https://forum.chibios.org/viewtopic.php?t=6625

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Fixed USB for STM32C0xx (for HAL conf v9 and RT conf v8)

Posted: Tue Dec 16, 2025 10:56 pm
by Engemil
Hi!

Based on development version of ChibiOS (github commit c474a2d75d31ce7e551c6ae69ba75dfdc95a9b7c) (to become version 21.11.5??), I fixed problems with USB for STM32C0xx, with for HAL config file version 9, RT config file version 8, and newest mcuconf for STM32C071RB.

Updated STM32C0xx port files.

I confirm it works on STM32C071RB. Hopefully there isn't anything else I missed, which might be important.

Code: Select all

From d1ab6f5d4087e1e4954484593e50ebb841b2d159 Mon Sep 17 00:00:00 2001
From: engemil <[email protected]>
Date: Tue, 16 Dec 2025 22:38:41 +0100
Subject: [PATCH] STM32C0xx USB fix

---
 os/hal/ports/STM32/STM32C0xx/hal_lld.c        |  2 +-
 os/hal/ports/STM32/STM32C0xx/hal_lld.h        |  4 +--
 os/hal/ports/STM32/STM32C0xx/stm32_isr.c      |  6 ++++
 os/hal/ports/STM32/STM32C0xx/stm32_isr.h      | 30 ++++++++++---------
 os/hal/ports/STM32/STM32C0xx/stm32_registry.h | 28 +++++++++--------
 5 files changed, 41 insertions(+), 29 deletions(-)

diff --git a/os/hal/ports/STM32/STM32C0xx/hal_lld.c b/os/hal/ports/STM32/STM32C0xx/hal_lld.c
index 298e06b869..cc74465857 100644
--- a/os/hal/ports/STM32/STM32C0xx/hal_lld.c
+++ b/os/hal/ports/STM32/STM32C0xx/hal_lld.c
@@ -205,7 +205,7 @@ static void hal_lld_set_static_clocks(void) {
                  STM32_ADCSEL | STM32_I2S1SEL | STM32_I2C1SEL | STM32_FDCAN1SEL | STM32_USART1SEL,
                  true);
 
-#if STM32_HAS_USB
+#if STM32_HAS_USB1
   /* CCIPR2 register initialization.*/
   halRegWrite32X(&RCC->CCIPR2, STM32_USBSEL, true);
 #endif
diff --git a/os/hal/ports/STM32/STM32C0xx/hal_lld.h b/os/hal/ports/STM32/STM32C0xx/hal_lld.h
index 563f336ec5..d22855ad61 100644
--- a/os/hal/ports/STM32/STM32C0xx/hal_lld.h
+++ b/os/hal/ports/STM32/STM32C0xx/hal_lld.h
@@ -785,7 +785,7 @@
     #error "HSE not enabled, required by STM32_RTCSEL"
   #endif
 
-  #if STM32_HAS_USB
+  #if STM32_HAS_USB1
     #if STM32_USBSEL == RCC_CCIPR2_USBSEL_HSE
       #error "HSE not enabled, required by STM32_USBSEL"
     #endif
@@ -1216,7 +1216,7 @@
  * @brief   USB clock frequency.
  */
 #if (STM32_USBSEL == RCC_CCIPR2_USBSEL_HSIUSB48) || defined(__DOXYGEN__)
-  #define STM32_USBCLK                      hal_lld_get_clock_point(CLK_HSIUSB48CLK)
+  #define STM32_USBCLK                      hal_lld_get_clock_point(CLK_HSIUSB48)
 
 #elif STM32_USBSEL == RCC_CCIPR2_USBSEL_HSE
   #define STM32_USBCLK                      STM32_HSECLK
diff --git a/os/hal/ports/STM32/STM32C0xx/stm32_isr.c b/os/hal/ports/STM32/STM32C0xx/stm32_isr.c
index bb2bca8166..ef463fa39b 100644
--- a/os/hal/ports/STM32/STM32C0xx/stm32_isr.c
+++ b/os/hal/ports/STM32/STM32C0xx/stm32_isr.c
@@ -68,6 +68,8 @@
 #include "stm32_tim16.inc"
 #include "stm32_tim17.inc"
 
+#include "stm32_usb1.inc"
+
 /*===========================================================================*/
 /* Driver exported functions.                                                */
 /*===========================================================================*/
@@ -93,6 +95,8 @@ void irqInit(void) {
 
   usart1_irq_init();
   usart2_irq_init();
+
+  usb1_irq_init();
 }
 
 /**
@@ -116,6 +120,8 @@ void irqDeinit(void) {
 
   usart1_irq_deinit();
   usart2_irq_deinit();
+
+  usb1_irq_deinit();
 }
 
 /** @} */
diff --git a/os/hal/ports/STM32/STM32C0xx/stm32_isr.h b/os/hal/ports/STM32/STM32C0xx/stm32_isr.h
index 2eaf50b098..9890e1c5d1 100644
--- a/os/hal/ports/STM32/STM32C0xx/stm32_isr.h
+++ b/os/hal/ports/STM32/STM32C0xx/stm32_isr.h
@@ -123,20 +123,22 @@
  */
 #define STM32_USART1_HANDLER                VectorAC
 #define STM32_USART2_HANDLER                VectorB0
-
-#define STM32_USART1_NUMBER                 27
-#define STM32_USART2_NUMBER                 28
-
-/*
- * USB units.
- */
-#define STM32_USB1_HP_HANDLER               Vector60
-#define STM32_USB1_LP_HANDLER               Vector60
-#define STM32_USB1_HP_NUMBER                8
-#define STM32_USB1_LP_NUMBER                8
-/** @} */
-
-/*===========================================================================*/
+
+#define STM32_USART1_NUMBER                 27
+#define STM32_USART2_NUMBER                 28
+
+/*
+ * USB units.
+ */
+//#define STM32_USB1_HP_HANDLER               Vector60
+//#define STM32_USB1_LP_HANDLER               Vector60
+//#define STM32_USB1_HP_NUMBER                8
+//#define STM32_USB1_LP_NUMBER                8
+#define STM32_USB1_HANDLER               Vector60
+#define STM32_USB1_NUMBER                8
+/** @} */
+
+/*===========================================================================*/
 /* Driver pre-compile time settings.                                         */
 /*===========================================================================*/
 
diff --git a/os/hal/ports/STM32/STM32C0xx/stm32_registry.h b/os/hal/ports/STM32/STM32C0xx/stm32_registry.h
index 6e1125f0e9..f24113bbbf 100644
--- a/os/hal/ports/STM32/STM32C0xx/stm32_registry.h
+++ b/os/hal/ports/STM32/STM32C0xx/stm32_registry.h
@@ -174,9 +174,10 @@
 #define STM32_HAS_I2C4                      FALSE
 
 /* OTG/USB attributes.*/
-#define STM32_HAS_OTG1                      FALSE
-#define STM32_HAS_OTG2                      FALSE
-#define STM32_HAS_USB                       FALSE
+//#define STM32_HAS_OTG1                      FALSE
+//#define STM32_HAS_OTG2                      FALSE
+//#define STM32_HAS_USB                       FALSE
+#define STM32_HAS_USB1                       FALSE
 
 /* RCC attributes.*/
 #define STM32_RCC_HAS_HSIUSB48              FALSE
@@ -325,9 +326,10 @@
 #define STM32_HAS_I2C4                      FALSE
 
 /* OTG/USB attributes.*/
-#define STM32_HAS_OTG1                      FALSE
-#define STM32_HAS_OTG2                      FALSE
-#define STM32_HAS_USB                       FALSE
+//#define STM32_HAS_OTG1                      FALSE
+//#define STM32_HAS_OTG2                      FALSE
+//#define STM32_HAS_USB                       FALSE
+#define STM32_HAS_USB1                       FALSE
 
 /* RCC attributes.*/
 #define STM32_RCC_HAS_HSIUSB48              FALSE
@@ -481,10 +483,11 @@
 #define STM32_HAS_I2C4                      FALSE
 
 /* OTG/USB attributes.*/
-#define STM32_HAS_OTG1                      FALSE
-#define STM32_HAS_OTG2                      FALSE
+//#define STM32_HAS_OTG1                      FALSE
+//#define STM32_HAS_OTG2                      FALSE
 
-#define STM32_HAS_USB                       TRUE
+#define STM32_HAS_USB1                      TRUE
+//#define STM32_HAS_USB                       TRUE
 #define STM32_USB_ACCESS_SCHEME_2x16        TRUE
 #define STM32_USB_PMA_SIZE                  2048
 #define STM32_USB_HAS_BCDR                  TRUE
@@ -645,9 +648,10 @@
 #define STM32_HAS_I2C4                      FALSE
 
 /* OTG/USB attributes.*/
-#define STM32_HAS_OTG1                      FALSE
-#define STM32_HAS_OTG2                      FALSE
-#define STM32_HAS_USB                       FALSE
+//#define STM32_HAS_OTG1                      FALSE
+//#define STM32_HAS_OTG2                      FALSE
+//#define STM32_HAS_USB                       FALSE
+#define STM32_HAS_USB1                       FALSE
 
 /* RCC attributes.*/
 #define STM32_RCC_HAS_HSIUSB48              FALSE

Re: Fixed USB for STM32C0xx (for HAL conf v9 and RT conf v8)

Posted: Wed Dec 17, 2025 8:26 am
by Giovanni
Hi,

Thanks for the patch and testing, I cannot test on C071 right now because no board.

I confirm, the current trunk HAL is what you will see in 21.11.5, hopefully next month.

Giovanni
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