fix: Reduces some flash erasure problems

Putting memcpy into RAM for execution
Turn off interrupt execution when erasing flash.

Author: HalfSweet

src/fw/drivers/flash/sf32lb52_int_flash.c

@@ -79,6 +79,7 @@ static int prv_erase_nor(uint32_t addr, uint32_t size) {
   FLASH_HandleTypeDef *hflash;
   uint32_t taddr, remain;
   int res;
+  __disable_irq();
 
   hflash = &spi_flash_handle.handle;
 
@@ -98,6 +99,7 @@ static int prv_erase_nor(uint32_t addr, uint32_t size) {
     taddr += QSPI_NOR_SECT_SIZE;
   }
 
+  __enable_irq();
   return 0;
 }
 
@@ -106,7 +108,9 @@ static int prv_write_nor(uint32_t addr, uint8_t *buf, uint32_t size) {
   uint32_t taddr, start, remain, fill;
   uint8_t *tbuf;
   int res;
+  __disable_irq();
 
+  HAL_FLASH_SET_WDT(hflash, UINT16_MAX);
   hflash = &spi_flash_handle.handle;
 
   if ((addr < hflash->base) || (addr > (hflash->base + hflash->size))) return 0;
@@ -138,6 +142,7 @@ static int prv_write_nor(uint32_t addr, uint8_t *buf, uint32_t size) {
     remain -= fill;
   }
 
+  __enable_irq();
   return size;
 }
 

src/fw/sf32lb_em525_flash_fw.ld.template

@@ -55,6 +55,7 @@ SECTIONS
         *.o                 (.text.rt_memset)
         *rt_memclr*.*.o       (.text*)
         *memset*.*.o          (.text*)      
+        *memcpy*.*.o          (.text*)  
 
         . = ALIGN(4);
         __retm_ro_end = .;

src/fw/startup/startup_sf32lb.c

@@ -69,10 +69,16 @@ __attribute__((naked)) NORETURN Reset_Handler(void) {
   boot_uart_tx("Reset_Handler\n", 14);
 
   // Copy data section from flash to RAM
-  memcpy(__data_start, __data_load_start, __data_end - __data_start);
+  // memcpy(__data_start, __data_load_start, __data_end - __data_start);
+  for (uint32_t i = 0; i < (__data_end - __data_start); i++) {
+    __data_start[i] = __data_load_start[i];
+  }
   boot_uart_tx("data copied\n", 12);
 
-  memcpy(__retm_ro_start, __retm_ro_load_start, __retm_ro_end - __retm_ro_start);
+  // memcpy(__retm_ro_start, __retm_ro_load_start, __retm_ro_end - __retm_ro_start);
+  for (uint32_t i = 0; i < (__retm_ro_end - __retm_ro_start); i++) {
+    __retm_ro_start[i] = __retm_ro_load_start[i];
+  }
   boot_uart_tx("retm copied\n", 12);
 
   // Clear the bss section, assumes .bss goes directly after .data