Revision 0:5ed2a30b9e68, committed 2018-05-23

Comitter:

potless

Date:

Wed May 23 23:01:17 2018 +0000

Commit message:

lire le nota en d?but de code.;

Changed in this revision

diff -r 000000000000 -r 5ed2a30b9e68 main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed May 23 23:01:17 2018 +0000
@@ -0,0 +1,104 @@
+#include "mbed.h"
+
+// mode d'emploi :
+// le STM passe en DFU après l'execution de ce code + un core reset envoyé depuis STLINK-utility
+// Comme ce core reset passe par le port SW, pour l'instant ça ne sert à rien
+// objectif 1 : trouver le moyen d'envoyer ce core reset par voie logicielle
+// objectif 2 : regarder si on peut charger un code en dfu par l'USB
+// objectif 3 : faire cohabiter l'USBserial et le DFU sur les mêmes pins
+
+
+int main() {
+    
+     //RESET INTO DFU MODE - NOTE THIS WILL STOP RUNNING YOUR FIRMWARE
+ //Don't do this unless you are comfortable flashing over USB / DFU
+ //and maybe have a programmer shield / st-link programmer
+
+
+
+void (*SysMemBootJump)(void);
+
+/**
+* Step: Set system memory address.
+*
+* For STM32F446, system memory is on 0x1FFF 0000
+* For other families, check AN2606 document table 110 with descriptions of memory addresses
+*/
+volatile uint32_t addr = 0x1FFF0000;
+
+/**
+* Step: Disable RCC, set it to default (after reset) settings
+* Internal clock, no PLL, etc.
+*/
+HAL_RCC_DeInit();
+__HAL_RCC_SYSCFG_CLK_ENABLE();
+/**
+* Step: Disable systick timer and reset it to default values
+*/
+SysTick->CTRL = 0;
+SysTick->LOAD = 0;
+SysTick->VAL = 0;
+
+
+/**
+* Step: Disable all interrupts
+*/
+__disable_irq();
+
+__DSB();
+
+/**
+* Step: Remap system memory to address 0x0000 0000 in address space
+* For each family registers may be different.
+* Check reference manual for each family.
+*
+* For STM32F4xx, MEMRMP register in SYSCFG is used (bits[1:0])
+* For STM32F0xx, CFGR1 register in SYSCFG is used (bits[1:0])
+* For others, check family reference manual
+*/
+//SYSCFG->MEMRMP = 1;
+
+__HAL_SYSCFG_REMAPMEMORY_SYSTEMFLASH(); //Call HAL macro to do this for you
+
+
+/**
+* Step: Set jump memory location for system memory
+* Use address with 4 bytes offset which specifies jump location where program starts
+*/
+
+
+/* Remap is not visible at once. Execute some unrelated command! */
+__DSB();
+__ISB();
+
+ 
+
+
+SysMemBootJump = (void (*)(void)) (*((uint32_t *)(addr + 4)));
+
+
+/**
+* Step: Set main stack pointer.
+* This step must be done last otherwise local variables in this function
+* don't have proper value since stack pointer is located on different position
+*
+* Set direct address location which specifies stack pointer in SRAM location
+*/
+__set_MSP(*(uint32_t *)addr);
+
+/**
+* Step: Actually call our function to jump to set location
+* This will start system memory execution
+*/
+
+SysMemBootJump();
+
+/**
+* Step: Connect USB<->UART converter to dedicated USART pins and test
+* and test with bootloader works with STM32 Flash Loader Demonstrator software
+*/
+
+
+
+}
+

diff -r 000000000000 -r 5ed2a30b9e68 mbed-os.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-os.lib	Wed May 23 23:01:17 2018 +0000
@@ -0,0 +1,1 @@
+https://github.com/ARMmbed/mbed-os/#a6e27b1b866e7301adcc81f94ea85e0ee7fc63de