Posted on May 17, 2011 at 14:25 Here is a few code.
do
{
/* Checkup memory */
FlashID = sFLASH_ReadID();
table[0] = SPI2->CR1;
table[1] = SPI2->CR2;
table[2] = SPI2->SR;
table[3] = RCC->APB1ENR;
table[4] = RCC->APB2ENR;
table[5] = RCC->AHBENR;
table[6] = GPIOB->ODR;
} while (FlashID != sFLASH_M25P64_ID );
This is how I proceed :
1° Power-up and flash the code
2° It works ( FlashID == M25P64_ID ) ... Reset with IAR => it works ... Reset, reset reset => it works, it works, it works. Reflash => it works.
3° Jump to partition 2
4° Reboot (with IAR)
5° Code does not work ( FlashID = 0x00, no SPI clock, table is exactly the same as when it was working )
6° Then I reboot (with IAR) again, and again, and again ... still doesn't work..
8° Okay, so let's reflash the code !
9° After a reflash ... doesn't work .... no clock, no SPI
10° Reflash, reflash, and reflash ... doesn't work ....
Finally ... power-off and power-up ... and now it works.
Believe me or not, the ONLY way to make it work is to make a power-reboot ... I've never seen such a situation ...
The ''log'' table is exactly the same when it's working or not.
What other register should I look at ??
What could that much mess-up the SPI ??
Why when I reset the µC with JTAG it still doesn't work ??
