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stm32: Add support for flashing over usb on stm32f042 

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2019-10-26 17:11:04 -04:00
parent 2ecc8d8f62
commit 5131ec5eb0
3 changed files with 18 additions and 1 deletions
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3
scripts/flash_usb.py
View File

@ -211,7 +211,8 @@ def flash_stm32f4(options, binfile):
MCUTYPES = {
'atsam3': flash_atsam3, 'atsam4': flash_atsam4, 'atsamd': flash_atsamd,
'lpc176x': flash_lpc176x, 'stm32f1': flash_stm32f1, 'stm32f4': flash_stm32f4
'lpc176x': flash_lpc176x, 'stm32f1': flash_stm32f1,
'stm32f4': flash_stm32f4, 'stm32f0': flash_stm32f4,
}

1
src/stm32/Makefile
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@ -49,6 +49,7 @@ $(OUT)klipper.bin: $(OUT)klipper.elf
$(Q)$(OBJCOPY) -O binary $< $@
# Flash rules
FLASH_TYPE-$(CONFIG_MACH_STM32F0) := stm32f0
FLASH_TYPE-$(CONFIG_MACH_STM32F1) := stm32f1
FLASH_TYPE-$(CONFIG_MACH_STM32F4) := stm32f4

15
src/stm32/stm32f0.c
View File

@ -6,6 +6,7 @@
#include "autoconf.h" // CONFIG_CLOCK_REF_8M
#include "board/armcm_boot.h" // armcm_main
#include "board/irq.h" // irq_disable
#include "command.h" // DECL_CONSTANT_STR
#include "internal.h" // enable_pclock
#include "sched.h" // sched_main
@ -86,10 +87,16 @@ gpio_peripheral(uint32_t gpio, uint32_t mode, int pullup)
regs->OSPEEDR = (regs->OSPEEDR & ~m_msk) | (0x02 << m_shift);
}
#define USB_BOOT_FLAG_ADDR (CONFIG_RAM_START + CONFIG_RAM_SIZE - 1024)
#define USB_BOOT_FLAG 0x55534220424f4f54 // "USB BOOT"
// Handle USB reboot requests
void
usb_request_bootloader(void)
{
irq_disable();
*(uint64_t*)USB_BOOT_FLAG_ADDR = USB_BOOT_FLAG;
NVIC_SystemReset();
}
#if CONFIG_CLOCK_REF_8M
@ -153,6 +160,14 @@ hsi48_setup(void)
void
armcm_main(void)
{
if (CONFIG_USBSERIAL && CONFIG_MACH_STM32F042
&& *(uint64_t*)USB_BOOT_FLAG_ADDR == USB_BOOT_FLAG) {
*(uint64_t*)USB_BOOT_FLAG_ADDR = 0;
uint32_t *sysbase = (uint32_t*)0x1fffc400;
asm volatile("mov sp, %0\n bx %1"
: : "r"(sysbase[0]), "r"(sysbase[1]));
}
SystemInit();
// Set flash latency