STM32G4库搞的一个快速内部Flash编程函数FLASH_Program_Fast

eric2013

代码如下，在文件stm32g4xx_hal_flash.c里面。

1. /**
   
2.   * @brief  Fast program a row double-word (64-bit) at a specified address.
   
3.   * @param  Address specifies the address to be programmed.
   
4.   * @param  DataAddress specifies the address where the data are stored.
   
5.   * @retval None
   
6.   */
   
7. static void FLASH_Program_Fast(uint32_t Address, uint32_t DataAddress)
   
8. {
   
9.   uint8_t row_index = (2 * FLASH_NB_DOUBLE_WORDS_IN_ROW);
   
10.   uint32_t *dest_addr = (uint32_t *)Address;
    
11.   uint32_t *src_addr = (uint32_t *)DataAddress;
    
12.   uint32_t primask_bit;
    
13. 
    
14.   /* Check the parameters */
    
15.   assert_param(IS_FLASH_MAIN_MEM_ADDRESS(Address));
    
16. 
    
17.   /* Set FSTPG bit */
    
18.   SET_BIT(FLASH->CR, FLASH_CR_FSTPG);
    
19. 
    
20.   /* Enter critical section: Disable interrupts to avoid any interruption during the loop */
    
21.   primask_bit = __get_PRIMASK();
    
22.   __disable_irq();
    
23. 
    
24.   /* Program the double words of the row */
    
25.   do
    
26.   {
    
27.     *dest_addr = *src_addr;
    
28.     dest_addr++;
    
29.     src_addr++;
    
30.     row_index--;
    
31.   }
    
32.   while (row_index != 0U);
    
33. 
    
34.   /* Exit critical section: restore previous priority mask */
    
35.   __set_PRIMASK(primask_bit);
    
36. }

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