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stm32f4: Add support for flashing over USB 

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2019-10-26 13:24:59 -04:00
parent 0ba5819370
commit 5da6a62759
3 changed files with 29 additions and 4 deletions
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15
scripts/flash_usb.py
View File

@ -189,7 +189,11 @@ def flash_stm32f1(options, binfile):
sys.exit(-1)
STM32F4_HELP = """
USB flash is not supported on the STM32F4!
Failed to flash to %s: %s
If the device is already in bootloader mode it can be flashed with the
following command:
make flash FLASH_DEVICE=0483:df11
If attempting to flash via 3.3V serial, then use:
make serialflash FLASH_DEVICE=%s
@ -197,7 +201,12 @@ If attempting to flash via 3.3V serial, then use:
"""
def flash_stm32f4(options, binfile):
sys.stderr.write(STM32F4_HELP % (options.device,))
try:
flash_dfuutil(options.device, binfile,
["-R", "-a", "0", "-s", str(options.start)], options.sudo)
except error as e:
sys.stderr.write(STM32F4_HELP % (
options.device, str(e), options.device))
sys.exit(-1)
MCUTYPES = {
@ -219,6 +228,8 @@ def main():
help="serial port device")
opts.add_option("-o", "--offset", type="string", dest="offset",
help="flash offset")
opts.add_option("-s", "--start", type="int", dest="start",
help="start address in flash")
opts.add_option("--no-sudo", action="store_false", dest="sudo",
default=True, help="do not run sudo")
options, args = opts.parse_args()

2
src/stm32/Makefile
View File

@ -54,7 +54,7 @@ FLASH_TYPE-$(CONFIG_MACH_STM32F4) := stm32f4
flash: $(OUT)klipper.bin
@echo " Flashing $< to $(FLASH_DEVICE)"
$(Q)$(PYTHON) ./scripts/flash_usb.py -t $(FLASH_TYPE-y) -d "$(FLASH_DEVICE)" $(if $(NOSUDO),--no-sudo) $(OUT)klipper.bin
$(Q)$(PYTHON) ./scripts/flash_usb.py -t $(FLASH_TYPE-y) -d "$(FLASH_DEVICE)" -s "$(CONFIG_FLASH_START)" $(if $(NOSUDO),--no-sudo) $(OUT)klipper.bin
serialflash: $(OUT)klipper.bin
@echo " Flashing $< to $(FLASH_DEVICE) via stm32flash"

14
src/stm32/stm32f4.c
View File

@ -6,6 +6,7 @@
#include "autoconf.h" // CONFIG_CLOCK_REF_8M
#include "board/armcm_boot.h" // VectorTable
#include "board/irq.h" // irq_disable
#include "board/usb_cdc.h" // usb_request_bootloader
#include "command.h" // DECL_CONSTANT_STR
#include "internal.h" // enable_pclock
@ -88,10 +89,16 @@ 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 - 4096)
#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
@ -202,6 +209,13 @@ clock_setup(void)
void
armcm_main(void)
{
if (*(uint64_t*)USB_BOOT_FLAG_ADDR == USB_BOOT_FLAG) {
*(uint64_t*)USB_BOOT_FLAG_ADDR = 0;
uint32_t *sysbase = (uint32_t*)0x1fff0000;
asm volatile("mov sp, %r0\n bx %r1"
: : "r"(sysbase[0]), "r"(sysbase[1]));
}
// Run SystemInit() and then restore VTOR
SystemInit();
SCB->VTOR = (uint32_t)VectorTable;