Hi, in the example for the OSPI-memorymapped example, the test procedure is as follows..
// This is running fine on the DEV board, ( it also works in byte mode fine.)
while (1)
{
/* Intensive Access ----------------------------------------------- */
mem_addr = (__IO uint32_t *)(OCTOSPI2_BASE + address);
for (index = 0; index < BUFFERSIZE; (index += 4))
{
/* Writing Sequence --------------------------------------------------- */
*mem_addr = *(uint32_t *)&aTxBuffer[index];
/* Reading Sequence --------------------------------------------------- */
if (*mem_addr != *(uint32_t *)&aTxBuffer[index])
{
BSP_LED_On(LED_RED);
}
mem_addr++;
}
An this indeed runs and i get a flashing green light indicating that its correct,
BUT......
// Running in byte mode or word mode fails
void writeTest(void)
{
__IO uint8_t *mem_addr;
uint32_t address = 0;
uint32_t index;
printf("Write Test\n");
while (1)
{
/* Intensive Access ----------------------------------------------- */
mem_addr = (__IO uint8_t *)(OCTOSPI1_BASE + address);
for (index = 0; index < BUFFERSIZE; (index ++))
{
/* Writing Sequence --------------------------------------------------- */
*mem_addr = *(uint8_t *)&aTxBuffer[index];
mem_addr++;
}
address += OSPI_HYPERRAM_INCR_SIZE;
if(address >= OSPI_HYPERRAM_END_ADDR)
{
address = 0;
return;
}
}
}
void readTest(void)
{
__IO uint8_t *mem_addr;
uint32_t address = 0;
uint32_t index;
printf("Read Test\n");
while (1)
{
/* Intensive Access ----------------------------------------------- */
mem_addr = (__IO uint8_t *)(OCTOSPI1_BASE + address);
printf("0x%p-",mem_addr);
for (index = 0; index < BUFFERSIZE; (index ++))
{
if (*mem_addr != *(uint8_t *)&aTxBuffer[index])
{
printf("ERROR Writing\n");
}
mem_addr++;
}
address += OSPI_HYPERRAM_INCR_SIZE;
if(address >= OSPI_HYPERRAM_END_ADDR)
{
address = 0;
return;
}
}
}
/*****************************************
*****************************************/
void hyperRamTest(void)
{
uint32_t address = 0;
uint32_t index;
__IO uint8_t *mem_addr;
long size = OSPI_HYPERRAM_END_ADDR*2;
printf("Hyper RAM test size 0x%x (",OSPI_HYPERRAM_END_ADDR*2);
printfcomma(size);
printf(") bytes\n");
//
writeTest();
readTest();
}
So now i have split up the read and write functions, and it ALWAYS fails?
Anyone know whats going on..
I have the STM32H735-DK dev board, and i have also built 2 PCBs that act the same way, with the same code.
I have checked that __IO is defined as volatile.
