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Merge pull request #1684 from cesanta/nucleo-f746zg-baremetal

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Workaround for aliased weak symbol override issue
This commit is contained in:
Sergey Lyubka 2022-08-25 05:10:06 +01:00 committed by GitHub
commit 1f6d62a635
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3 changed files with 13 additions and 18 deletions
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8
examples/stm32/nucleo-f746zg-baremetal/README.md
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@ -9,7 +9,7 @@ which implements the following:
- Interrupt-driven [mip_driver_stm32.h](../../../drivers/mip_driver_stm32.h) ethernet driver
- Blue LED blinky, based on SysTick interrupt
- User button handler, turns off/on green LED, based on EXTI, interrupt-driven
- Catch-all fault handler that blinks red LED
- HardFault handler that blinks red LED
- Debug log on UART3 (st-link)
## Requirements
@ -24,13 +24,13 @@ Plugin your Nucleo board into USB, and attach an Ethernet cable.
To build and flash:
```sh
make clean flash
$ make clean flash
```
To see debug log, use any serial monitor program like `cu`:
To see debug log, use any serial monitor program like `picocom` at 115200 bps and configure it to insert carriage returns after line feeds:
```sh
cu -l /dev/ttyACM0 -s 115200
$ picocom /dev/ttyACM0 -i -b 115200 --imap=lfcrlf
```
## Benchmark

19
examples/stm32/nucleo-f746zg-baremetal/boot.c
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@ -21,20 +21,8 @@ void __attribute__((weak)) DefaultIRQHandler(void) {
for (;;) (void) 0;
}
void __attribute__((weak)) EXTI_IRQHandler(void) {
for (;;) (void) 0;
}
#define WEAK_ALIAS __attribute__((weak, alias("DefaultIRQHandler")))
__attribute__((alias("EXTI_IRQHandler"))) void EXTI0_IRQHandler(void);
__attribute__((alias("EXTI_IRQHandler"))) void EXTI1_IRQHandler(void);
__attribute__((alias("EXTI_IRQHandler"))) void EXTI2_IRQHandler(void);
__attribute__((alias("EXTI_IRQHandler"))) void EXTI3_IRQHandler(void);
__attribute__((alias("EXTI_IRQHandler"))) void EXTI4_IRQHandler(void);
__attribute__((alias("EXTI_IRQHandler"))) void EXTI9_5_IRQHandler(void);
__attribute__((alias("EXTI_IRQHandler"))) void EXTI15_10_IRQHandler(void);
WEAK_ALIAS void NMI_Handler(void);
WEAK_ALIAS void HardFault_Handler(void);
WEAK_ALIAS void MemManage_Handler(void);
@ -51,6 +39,13 @@ WEAK_ALIAS void TAMP_STAMP_IRQHandler(void);
WEAK_ALIAS void RTC_WKUP_IRQHandler(void);
WEAK_ALIAS void FLASH_IRQHandler(void);
WEAK_ALIAS void RCC_IRQHandler(void);
WEAK_ALIAS void EXTI0_IRQHandler(void);
WEAK_ALIAS void EXTI1_IRQHandler(void);
WEAK_ALIAS void EXTI2_IRQHandler(void);
WEAK_ALIAS void EXTI3_IRQHandler(void);
WEAK_ALIAS void EXTI4_IRQHandler(void);
WEAK_ALIAS void EXTI9_5_IRQHandler(void);
WEAK_ALIAS void EXTI15_10_IRQHandler(void);
WEAK_ALIAS void DMA1_Stream0_IRQHandler(void);
WEAK_ALIAS void DMA1_Stream1_IRQHandler(void);
WEAK_ALIAS void DMA1_Stream2_IRQHandler(void);

4
examples/stm32/nucleo-f746zg-baremetal/main.c
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@ -21,7 +21,7 @@ uint64_t mg_millis(void) { // Declare our own uptime function
return s_ticks; // Return number of milliseconds since boot
}
void DefaultIRQHandler(void) { // Catch-all fault handler
void HardFault_Handler(void) { // Escalated fault handler
gpio_output(LED3); // Setup red LED
for (;;) spin(2999999), gpio_toggle(LED3); // Blink LED infinitely
}
@ -30,7 +30,7 @@ void SysTick_Handler(void) { // SyStick IRQ handler, triggered every 1ms
s_ticks++;
}
void EXTI_IRQHandler(void) {
void EXTI15_10_IRQHandler(void) { // External interrupt handler
s_exti++;
if (EXTI->PR & BIT(PINNO(BTN1))) EXTI->PR = BIT(PINNO(BTN1));
gpio_write(LED1, gpio_read(BTN1)); // No debounce. Turn LED if button pressed