Clock configuration for Nucleo-H7A3

Hello @Community member​ 

Thanks for the feedback,

It will be fixed next CubeMX version.

Best regards,

Nesrine

​next week.

Regards,

Nesrine

Hi Nesrine

I've installed the new version, the CubeMX is able to configure the clocks for 280MHz,

however the code generated for the CubeIDE seems to had 2 bugs, can you please confirm:

Original code for SystemClock config:

/**
 * @brief System Clock Configuration
 * @retval None
 */
void SystemClock_Config(void)
{
 LL_FLASH_SetLatency(FLASH_LATENCY_7);
 
 if(LL_FLASH_GetLatency() != LL_FLASH_LATENCY_7)
 {
 Error_Handler(); 
 }
 LL_PWR_ConfigSupply(LL_PWR_DIRECT_SMPS_SUPPLY);
 LL_PWR_SetRegulVoltageScaling(LL_PWR_REGU_VOLTAGE_SCALE0);
 LL_RCC_HSE_EnableBypass();
 LL_RCC_HSE_Enable();
 
 /* Wait till HSE is ready */
 while(LL_RCC_HSE_IsReady() != 1)
 {
 
 }
 LL_RCC_HSI48_Enable();
 
 /* Wait till HSI48 is ready */
 while(LL_RCC_HSI48_IsReady() != 1)
 {
 
 }
 LL_RCC_PLL_SetSource(LL_RCC_PLLSOURCE_HSE);
 LL_RCC_PLL1P_Enable();
 LL_RCC_PLL1_SetVCOInputRange(LL_RCC_PLLINPUTRANGE_8_16);
 LL_RCC_PLL1_SetVCOOutputRange(LL_RCC_PLLVCORANGE_WIDE);
 LL_RCC_PLL1_SetM(1);
 LL_RCC_PLL1_SetN(70);
 LL_RCC_PLL1_SetP(2);
 LL_RCC_PLL1_SetQ(4);
 LL_RCC_PLL1_SetR(2);
 LL_RCC_PLL1_Enable();
 
 /* Wait till PLL is ready */
 while(LL_RCC_PLL1_IsReady() != 1)
 {
 };
 
 /* Intermediate AHB prescaler 2 when target frequency clock is higher than 80 MHz */
 LL_RCC_SetAHBPrescaler(LL_RCC_AHB_DIV_2);
 
 LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_PLL1);
 LL_RCC_SetAHBPrescaler(LL_RCC_AHB_DIV_1);
 LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_2);
 LL_RCC_SetAPB2Prescaler(LL_RCC_APB2_DIV_2);
 LL_RCC_SetAPB3Prescaler(LL_RCC_APB3_DIV_2);
 LL_RCC_SetAPB4Prescaler(LL_RCC_APB4_DIV_2);
 LL_SetSystemCoreClock(280000000);
 
 /* Update the time base */
 if (HAL_InitTick (TICK_INT_PRIORITY) != HAL_OK)
 {
 Error_Handler(); 
 };
 LL_RCC_SetUSARTClockSource(LL_RCC_USART234578_CLKSOURCE_PCLK1);
 LL_RCC_SetUSBClockSource(LL_RCC_USB_CLKSOURCE_HSI48);
}

I think line 47 is wrong (SetAHBPrescaler is used in line 50), I believe it should be something like:

LL_RCC_SetSysPrescaler(LL_RCC_SYSCLK_DIV_1);

Also a line must be included to increase the programming delay (according to table 15 of the reference manual)

something like this after setting the latency (before line 13?):

 __HAL_FLASH_SET_PROGRAM_DELAY(FLASH_PROGRAMMING_DELAY_3); 

Am I correct?

Thanks

Hello @Community member​ 

Could you please send me your .ioc file.

Regards,

Nesrine

Hi @Community member​ 

Function LL_RCC_SetAHBPrescaler cannot accept argument type LL_RCC_SYSCLK_DIV_2.

It should be LL_RCC_AHB_DIV_2.

For this line, __HAL_FLASH_SET_PROGRAM_DELAY(FLASH_PROGRAMMING_DELAY_3); I will check it with the development team then i will tell you.

Regards,

Nesrine

The clock is working ok because the AHBPrescaler is by default set to 1, however the programming delay is not set according to table 15, the (default) value for WRHIGHFREQ: Flash signal delay is 1 instead of 3.