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用cubemx自动生成代码，只要主频设置的超过200MHz就需要调整vos等级 __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE2); 或者 __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1); 只要调整完vos等级程序就会一直卡在vosrdy位上。系统默认的vos3等级不会卡在这一位上。 附上部分源码： void SystemClock_Config(void) { RCC_OscInitTypeDef RCC_OscInitStruct = {0}; RCC_ClkInitTypeDef RCC_ClkInitStruct = {0}; RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0}; /**Configure the main internal regulator output voltage */ __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1); while ((PWR->D3CR & (PWR_D3CR_VOSRDY)) != PWR_D3CR_VOSRDY) <-- 程序卡在这条 { } .......... } |
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/**
* @brief System Clock Configuration
* The system Clock is configured as follow :
* System Clock source = PLL (HSE BYPASS)
* SYSCLK(Hz) = 400000000 (CPU Clock)
* HCLK(Hz) = 200000000 (AXI and AHBs Clock)
* AHB Prescaler = 2
* D1 APB3 Prescaler = 2 (APB3 Clock 100MHz)
* D2 APB1 Prescaler = 2 (APB1 Clock 100MHz)
* D2 APB2 Prescaler = 2 (APB2 Clock 100MHz)
* D3 APB4 Prescaler = 2 (APB4 Clock 100MHz)
* HSE Frequency(Hz) = 8000000
* PLL_M = 4
* PLL_N = 400
* PLL_P = 2
* PLL_Q = 4
* PLL_R = 2
* VDD(V) = 3.3
* Flash Latency(WS) = 4
* @param None
* @retval None
*/
static void SystemClock_Config(void)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
HAL_StatusTypeDef ret = HAL_OK;
/*!< Supply configuration update enable */
MODIFY_REG(PWR->CR3, PWR_CR3_SCUEN, 0);
/* The voltage scaling allows optimizing the power consumption when the device is
clocked below the maximum system frequency, to update the voltage scaling value
regarding system frequency refer to product datasheet. */
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
while(!__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY)) {}
/* Enable HSE Oscillator and activate PLL with HSE as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS;
RCC_OscInitStruct.HSIState = RCC_HSI_OFF;
RCC_OscInitStruct.CSIState = RCC_CSI_OFF;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLM = 4;
RCC_OscInitStruct.PLL.PLLN = 400;
RCC_OscInitStruct.PLL.PLLP = 2;
RCC_OscInitStruct.PLL.PLLR = 2;
RCC_OscInitStruct.PLL.PLLQ = 4;
RCC_OscInitStruct.PLL.PLLVCOSEL = RCC_PLL1VCOWIDE;
RCC_OscInitStruct.PLL.PLLRGE = RCC_PLL1VCIRANGE_2;
ret = HAL_RCC_OscConfig(&RCC_OscInitStruct);
if(ret != HAL_OK)
{
Error_Handler();
}
/* Select PLL as system clock source and configure bus clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_D1PCLK1 | RCC_CLOCKTYPE_PCLK1 | \
RCC_CLOCKTYPE_PCLK2 | RCC_CLOCKTYPE_D3PCLK1);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.SYSCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.AHBCLKDivider = RCC_HCLK_DIV2;
RCC_ClkInitStruct.APB3CLKDivider = RCC_APB3_DIV2;
RCC_ClkInitStruct.APB1CLKDivider = RCC_APB1_DIV2;
RCC_ClkInitStruct.APB2CLKDivider = RCC_APB2_DIV2;
RCC_ClkInitStruct.APB4CLKDivider = RCC_APB4_DIV2;
ret = HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4);
if(ret != HAL_OK)
{
Error_Handler();
}
/*activate CSI clock mondatory for I/O Compensation Cell*/
__HAL_RCC_CSI_ENABLE() ;
/* Enable SYSCFG clock mondatory for I/O Compensation Cell */
__HAL_RCC_SYSCFG_CLK_ENABLE() ;
/* Enables the I/O Compensation Cell */
HAL_EnableCompensationCell();
}
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Bit 2 SCUEN: Supply configuration update enable
This bit is read-only:
0: Supply configuration update locked.
1: Single write enabled to Supply configuration (LDOEN and BYPASS)
这位只是使能了对bit1和bit2修改，并没有做任何实际操作啊，怎么就莫名其妙的可以修改vos了，这时给vcore供电的是稳压器呢还是vcap呢，我再另一个帖子上有相关的回复，麻烦看下
http://bbs.21ic.com/icview-2621990-1-1.html
谢谢Kevin201707
Bit 2 SCUEN: Supply configuration update enable
This bit is read-only:
0: Supply configuration update locked.
1: Single write enabled to Supply configuration (LDOEN and BYPASS)
PWR_CR3_SCUEN这一位只是使能了对bit1和bit2的修改，并没有什么实际操作啊，怎么就可以修改vos了呢，况且这个修改之后给vcore供电的是稳压器还是vcap呢不得而知啊。我在另一个论坛上也讨论过这个问题，麻烦移步看下，谢谢
http://bbs.21ic.com/icview-2621990-1-1.html
添加 MODIFY_REG(PWR->CR3, PWR_CR3_SCUEN, 0);后确实可以，调试进去发现fclock确实是在400MHz了，但是官方手册上这么说的：
Bit 2 SCUEN: Supply configuration update enable
This bit is read-only:
0: Supply configuration update locked.
1: Single write enabled to Supply configuration (LDOEN and BYPASS)
PWR_CR3_SCUEN这一位只是使能了对bit1和bit2的修改，并没有什么实际操作啊，怎么就可以修改vos了呢，况且这个修改之后给vcore供电的是稳压器还是vcap呢不得而知啊。我在另一个论坛上也讨论过这个问题，麻烦移步看下，谢谢
新版cubemx可能有，使能这里是更新Vol配置，你之前配置了但是没更新，看看这个寄存器特性。
嗯，又仔细看了下手册，确实是没有使能。不过这么就使能了，bit0和bit1并没有设置，那我给vcore供电的是稳压器呢还是vcap，是不是高频的时候必须得vcap供电呢。
不过高频的问题还是解决了，再也不用怕复用swdio了,谢谢