djsundog
/
circuitpython
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Update STM DFU mode software implementation. 

- fix for sizeof array calculation.

 - follow ARM recommendation to turn off interruptions with NVIC.
This commit is contained in:
flom84 2022-09-25 19:49:46 +02:00 committed by flom84
parent 03f02c7e8a
commit 3609c29b27
1 changed files with 13 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
ports/stm/supervisor/port.c
View File

@ -290,13 +290,22 @@ condition and generating hardware reset or using Go command to execute user code
HAL_RCC_DeInit();
HAL_DeInit();
// disable all interupts
__disable_irq();
// Disable all pending interrupts using NVIC
for (uint8_t i = 0; i < (sizeof(NVIC->ICER) / sizeof(NVIC->ICER[0])); ++i) {
NVIC->ICER[i] = 0xFFFFFFFF;
}
// Clear all pending interrupts
for (uint8_t i = 0; i < (sizeof(NVIC->ICPR) / NVIC->ICPR[0]); ++i) {
// if it is necessary to ensure an interrupt will not be triggered after disabling it in the NVIC,
// add a DSB instruction and then an ISB instruction. (ARM Cortex™-M Programming Guide to
// Memory Barrier Instructions, 4.6 Disabling Interrupts using NVIC)
__DSB();
__ISB();
// Clear all pending interrupts using NVIC
for (uint8_t i = 0; i < (sizeof(NVIC->ICPR) / sizeof(NVIC->ICPR[0])); ++i) {
NVIC->ICPR[i] = 0xFFFFFFFF;
}
// information about jump addresses has been taken from STM AN2606.
#if defined(STM32F4)
__set_MSP(*((uint32_t *)0x1FFF0000));