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stm32: Support PA11/PA12 pin remap on stm32f042 tsop20 chip 

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2019-10-15 17:45:48 -04:00
parent a6d90bb95e
commit 0b0c47c566
2 changed files with 12 additions and 0 deletions
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4
src/stm32/Kconfig
View File

@ -124,6 +124,10 @@ config USBSERIAL
bool "Use USB for communication (instead of serial)" bool "Use USB for communication (instead of serial)"
depends on HAVE_STM32_USBFS || HAVE_STM32_USBOTG depends on HAVE_STM32_USBFS || HAVE_STM32_USBOTG
default y default y
config STM32F042_USB_PIN_SWAP
bool "Use PA9/PA10 for USB" if MACH_STM32F042
depends on USBSERIAL && MACH_STM32F042
default n
config SERIAL config SERIAL
depends on !USBSERIAL depends on !USBSERIAL
bool bool

8
src/stm32/stm32f0.c
View File

@ -159,4 +159,12 @@ clock_setup(void)
hsi48_setup(); hsi48_setup();
else else
pll_setup(); pll_setup();
// Support alternate USB pins on stm32f042
#ifdef SYSCFG_CFGR1_PA11_PA12_RMP
if (CONFIG_STM32F042_USB_PIN_SWAP) {
enable_pclock(SYSCFG_BASE);
SYSCFG->CFGR1 |= SYSCFG_CFGR1_PA11_PA12_RMP;
}
#endif
} }