[原创] 【NUCLEO-L552ZE测评】-2: Stay in TrustZone

上一个帖子里说到，按照教程里的步骤设置完以后，看不到EXTI Line 13，看到的是14。这个问题的解决办法是在“Pinout view”里设置一下：

 

 

但接下来还有问题——在外部中断13（也包括14）的右边勾选框里，却不能选中，但在下方的图例中却有提示——灰色标示“Enabled”：

 

既然是这样，不妨继续往下走，生成的工程代码是这样（看左上角）：

 

教程（https://www.stmcu.com.cn/ecosystem/chip/chipfamily-STM32L5-4）里的设想是这样：

1、PC7（绿色LED）和 PB7（蓝色LED）作为指示灯分别设置到S（安全）和NS（非安全）区域；

2、PC13（蓝色的用户按键开关）作为外部中断的接入口；

3、PG7和PG8分别作为LPUART1的TX和RX，用来实现PC与mcu的交互。设在NS非安全区；

4、在安全和非安全区的中断服务子程序（EXTI_ISR()中设置同一段代码——翻转蓝绿两个LED。

实际要看到的效果是：默认的情况下，EXTI 13的中断指向安全区，但是，通过API调用Secure代码，可以重置EXTI 13的指向——安全区或者非安全区的NVIC。这样，就能观察到，安全区内的EXTI_ISR()对两个灯都有效，而非安全区，仅对一个灯有效。

本帖最后由 MianQi 于 2020-12-29 10:53 编辑

谢谢分享！期待后续评测！

“项目配置代码生成”按键在这里：（左上角）

生成的项目文件树是这样：

注意：安全区比非安全区多了一个文件：secure_nsc.c

 

按照教程（https://www.stmcu.com.cn/ecosystem/chip/chipfamily-STM32L5-4）里的说明：在S（安全）区和NS（非安全）区分别做两项工作：

安全区：MX_MX_GPIO_Init() 　和　MX_GTZC_Init()

非安全区：MX_MX_GPIO_Init() 　和　MX_LPUART1_UART_Init()

本帖最后由 MianQi 于 2020-12-31 17:32 编辑

在S和 NS区各自添加两段代码：第一段代码是相同的，都是“EXTI.13_ISR”，位置都在main.c的这里：

/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

代码的内容是：

void HAL_GPIO_EXTI_Rising_Callback(uint16_t GPIO_Pin)

{

UNUSED(GPIO_Pin);

HAL_GPIO_TogglePin(LED_GREEN_GPIO_Port, LED_GREEN_Pin);

HAL_GPIO_TogglePin(LED_BLUE_GPIO_Port, LED_BLUE_Pin);

}

 

第二段代码，S区的内容是：

CMSE_NS_ENTRY void SECURE_RetargetISR(uint8_t flag)

{

if (flag == 0x31)

{

NVIC_DisableIRQ (EXTI13_IRQn);

HAL_EXTI_ConfigLineAttributes(EXTI_LINE_13, EXTI_LINE_NSEC);

NVIC_SetTargetState (EXTI13_IRQn);

NVIC_EnableIRQ (EXTI13_IRQn);

}

else if (flag == 0x30)

{

NVIC_DisableIRQ(EXTI13_IRQn);

HAL_EXTI_ConfigLineAttributes (EXTI_LINE_13, EXTI_LINE_SEC);

NVIC_ClearTargetState (EXTI13_IRQn);

NVIC_EnableIRQ (EXTI13_IRQn);

}

}

目的是：实现供NS调用的切换EXTI.13 target函数。位置在secure_nsc.c里。

 

NS区的内容是：

while (HAL_UART_Receive (&hlpuart1, &InputChar, 1, 1000) == HAL_OK)

{

if (InputChar != Status)

{

if (InputChar == 0x30)

HAL_UART_Transmit (&hlpuart1, “\r\n to be switched to S world.”);

else if (InputChar == 0x31)

HAL_UART_Transmit (&hlpuart1, “\r\n to be switched to NS world.”);

 

SECURE_RetargetISR (InputChar);

Status = InputChar;

if (Status = 0x30)

HAL_UART_Transmit(&hlpuart1, “\r\n User Button has been switched to S world.”);

else if (Status == 0x31)

HAL_UART_Transmit (&hlpuart1, “\r\n User Button has been switched to NS world.”);

else

HAL_UART_Transmit (&hlpuart1, “\r\n the same state, do nothing. \n”);

}

位置在：main.c里的while(1)中。

 

插上板子，会提示“NODE_L552ZE”。

 

编译，会报错：

 

08:02:08 **** Incremental Build of configuration Debug for project test_TrustZone-1_NonSecure ****

make -j8 all

arm-none-eabi-gcc "../Core/Src/main.c" -mcpu=cortex-m33 -std=gnu11 -g3 -DUSE_HAL_DRIVER -DSTM32L552xx -DDEBUG -c -I../Core/Inc -I../../Secure_nsclib -I../../Drivers/STM32L5xx_HAL_Driver/Inc -I../../Drivers/CMSIS/Device/ST/STM32L5xx/Include -I../../Drivers/STM32L5xx_HAL_Driver/Inc/Legacy -I../../Drivers/CMSIS/Include -O0 -ffunction-sections -fdata-sections -Wall -fstack-usage -MMD -MP -MF"Core/Src/main.d" -MT"Core/Src/main.o" --specs=nano.specs -mfpu=fpv5-sp-d16 -mfloat-abi=hard -mthumb -o "Core/Src/main.o"

../Core/Src/main.c: In function 'main':

../Core/Src/main.c:102:41: error: 'InputChar' undeclared (first use in this function)

while (HAL_UART_Receive (&hlpuart1, &InputChar, 1, 1000) == HAL_OK)

^~~~~~~~~

../Core/Src/main.c:102:41: note: each undeclared identifier is reported only once for each function it appears in

../Core/Src/main.c:104:22: error: 'Status' undeclared (first use in this function); did you mean 'ITStatus'?

if (InputChar != Status)

^~~~~~

ITStatus

../Core/Src/main.c:107:37: warning: pointer targets in passing argument 2 of 'HAL_UART_Transmit' differ in signedness [-Wpointer-sign]

HAL_UART_Transmit (&hlpuart1, "\r\n to be switched to S world.");

^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

In file included from ../Core/Inc/stm32l5xx_hal_conf.h:402:0,

from ../../Drivers/STM32L5xx_HAL_Driver/Inc/stm32l5xx_hal.h:30,

from ../Core/Inc/main.h:31,

from ../Core/Src/main.c:21:

../../Drivers/STM32L5xx_HAL_Driver/Inc/stm32l5xx_hal_uart.h:1581:19: note: expected 'uint8_t * {aka unsigned char *}' but argument is of type 'char *'

HAL_StatusTypeDef HAL_UART_Transmit(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size, uint32_t Timeout);

^~~~~~~~~~~~~~~~~

../Core/Src/main.c:107:7: error: too few arguments to function 'HAL_UART_Transmit'

HAL_UART_Transmit (&hlpuart1, "\r\n to be switched to S world.");

^~~~~~~~~~~~~~~~~

In file included from ../Core/Inc/stm32l5xx_hal_conf.h:402:0,

from ../../Drivers/STM32L5xx_HAL_Driver/Inc/stm32l5xx_hal.h:30,

from ../Core/Inc/main.h:31,

from ../Core/Src/main.c:21:

../../Drivers/STM32L5xx_HAL_Driver/Inc/stm32l5xx_hal_uart.h:1581:19: note: declared here

HAL_StatusTypeDef HAL_UART_Transmit(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size, uint32_t Timeout);

^~~~~~~~~~~~~~~~~

../Core/Src/main.c:109:37: warning: pointer targets in passing argument 2 of 'HAL_UART_Transmit' differ in signedness [-Wpointer-sign]

HAL_UART_Transmit (&hlpuart1, "\r\n to be switched to NS world.");

^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

In file included from ../Core/Inc/stm32l5xx_hal_conf.h:402:0,

from ../../Drivers/STM32L5xx_HAL_Driver/Inc/stm32l5xx_hal.h:30,

from ../Core/Inc/main.h:31,

from ../Core/Src/main.c:21:

../../Drivers/STM32L5xx_HAL_Driver/Inc/stm32l5xx_hal_uart.h:1581:19: note: expected 'uint8_t * {aka unsigned char *}' but argument is of type 'char *'

HAL_StatusTypeDef HAL_UART_Transmit(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size, uint32_t Timeout);

^~~~~~~~~~~~~~~~~

../Core/Src/main.c:109:7: error: too few arguments to function 'HAL_UART_Transmit'

HAL_UART_Transmit (&hlpuart1, "\r\n to be switched to NS world.");

^~~~~~~~~~~~~~~~~

In file included from ../Core/Inc/stm32l5xx_hal_conf.h:402:0,

from ../../Drivers/STM32L5xx_HAL_Driver/Inc/stm32l5xx_hal.h:30,

from ../Core/Inc/main.h:31,

from ../Core/Src/main.c:21:

../../Drivers/STM32L5xx_HAL_Driver/Inc/stm32l5xx_hal_uart.h:1581:19: note: declared here

HAL_StatusTypeDef HAL_UART_Transmit(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size, uint32_t Timeout);

^~~~~~~~~~~~~~~~~

../Core/Src/main.c:111:6: warning: implicit declaration of function 'SECURE_RetargetISR' [-Wimplicit-function-declaration]

SECURE_RetargetISR (InputChar);

^~~~~~~~~~~~~~~~~~

../Core/Src/main.c:115:36: warning: pointer targets in passing argument 2 of 'HAL_UART_Transmit' differ in signedness [-Wpointer-sign]

HAL_UART_Transmit(&hlpuart1, "\r\n User Button has been switched to S world.");

^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

In file included from ../Core/Inc/stm32l5xx_hal_conf.h:402:0,

from ../../Drivers/STM32L5xx_HAL_Driver/Inc/stm32l5xx_hal.h:30,

from ../Core/Inc/main.h:31,

from ../Core/Src/main.c:21:

../../Drivers/STM32L5xx_HAL_Driver/Inc/stm32l5xx_hal_uart.h:1581:19: note: expected 'uint8_t * {aka unsigned char *}' but argument is of type 'char *'

HAL_StatusTypeDef HAL_UART_Transmit(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size, uint32_t Timeout);

^~~~~~~~~~~~~~~~~

../Core/Src/main.c:115:7: error: too few arguments to function 'HAL_UART_Transmit'

HAL_UART_Transmit(&hlpuart1, "\r\n User Button has been switched to S world.");

^~~~~~~~~~~~~~~~~

In file included from ../Core/Inc/stm32l5xx_hal_conf.h:402:0,

from ../../Drivers/STM32L5xx_HAL_Driver/Inc/stm32l5xx_hal.h:30,

from ../Core/Inc/main.h:31,

from ../Core/Src/main.c:21:

../../Drivers/STM32L5xx_HAL_Driver/Inc/stm32l5xx_hal_uart.h:1581:19: note: declared here

HAL_StatusTypeDef HAL_UART_Transmit(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size, uint32_t Timeout);

^~~~~~~~~~~~~~~~~

../Core/Src/main.c:117:36: warning: pointer targets in passing argument 2 of 'HAL_UART_Transmit' differ in signedness [-Wpointer-sign]

HAL_UART_Transmit(&hlpuart1, "\r\n User Button has been switched to NS world.");

^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

In file included from ../Core/Inc/stm32l5xx_hal_conf.h:402:0,

from ../../Drivers/STM32L5xx_HAL_Driver/Inc/stm32l5xx_hal.h:30,

from ../Core/Inc/main.h:31,

from ../Core/Src/main.c:21:

../../Drivers/STM32L5xx_HAL_Driver/Inc/stm32l5xx_hal_uart.h:1581:19: note: expected 'uint8_t * {aka unsigned char *}' but argument is of type 'char *'

HAL_StatusTypeDef HAL_UART_Transmit(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size, uint32_t Timeout);

^~~~~~~~~~~~~~~~~

../Core/Src/main.c:117:7: error: too few arguments to function 'HAL_UART_Transmit'

HAL_UART_Transmit(&hlpuart1, "\r\n User Button has been switched to NS world.");

^~~~~~~~~~~~~~~~~

In file included from ../Core/Inc/stm32l5xx_hal_conf.h:402:0,

from ../../Drivers/STM32L5xx_HAL_Driver/Inc/stm32l5xx_hal.h:30,

from ../Core/Inc/main.h:31,

from ../Core/Src/main.c:21:

../../Drivers/STM32L5xx_HAL_Driver/Inc/stm32l5xx_hal_uart.h:1581:19: note: declared here

HAL_StatusTypeDef HAL_UART_Transmit(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size, uint32_t Timeout);

^~~~~~~~~~~~~~~~~

../Core/Src/main.c:120:36: warning: pointer targets in passing argument 2 of 'HAL_UART_Transmit' differ in signedness [-Wpointer-sign]

HAL_UART_Transmit(&hlpuart1, "\r\n the same state, do nothing. \n");

^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

In file included from ../Core/Inc/stm32l5xx_hal_conf.h:402:0,

from ../../Drivers/STM32L5xx_HAL_Driver/Inc/stm32l5xx_hal.h:30,

from ../Core/Inc/main.h:31,

from ../Core/Src/main.c:21:

../../Drivers/STM32L5xx_HAL_Driver/Inc/stm32l5xx_hal_uart.h:1581:19: note: expected 'uint8_t * {aka unsigned char *}' but argument is of type 'char *'

HAL_StatusTypeDef HAL_UART_Transmit(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size, uint32_t Timeout);

^~~~~~~~~~~~~~~~~

../Core/Src/main.c:120:7: error: too few arguments to function 'HAL_UART_Transmit'

HAL_UART_Transmit(&hlpuart1, "\r\n the same state, do nothing. \n");

^~~~~~~~~~~~~~~~~

In file included from ../Core/Inc/stm32l5xx_hal_conf.h:402:0,

from ../../Drivers/STM32L5xx_HAL_Driver/Inc/stm32l5xx_hal.h:30,

from ../Core/Inc/main.h:31,

from ../Core/Src/main.c:21:

../../Drivers/STM32L5xx_HAL_Driver/Inc/stm32l5xx_hal_uart.h:1581:19: note: declared here

HAL_StatusTypeDef HAL_UART_Transmit(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size, uint32_t Timeout);

^~~~~~~~~~~~~~~~~

../Core/Src/main.c: In function 'HAL_GPIO_EXTI_Rising_Callback':

../Core/Src/main.c:293:21: error: 'LED_GREEN_GPIO_Port' undeclared (first use in this function); did you mean 'LED_BLUE_GPIO_Port'?

HAL_GPIO_TogglePin(LED_GREEN_GPIO_Port, LED_GREEN_Pin);

^~~~~~~~~~~~~~~~~~~

LED_BLUE_GPIO_Port

../Core/Src/main.c:293:42: error: 'LED_GREEN_Pin' undeclared (first use in this function); did you mean 'LED_BLUE_Pin'?

HAL_GPIO_TogglePin(LED_GREEN_GPIO_Port, LED_GREEN_Pin);

^~~~~~~~~~~~~

LED_BLUE_Pin

make: *** [Core/Src/subdir.mk:33: Core/Src/main.o] Error 1

"make -j8 all" terminated with exit code 2. Build might be incomplete.

 

08:02:08 Build Failed. 10 errors, 6 warnings. (took 665ms)

对TrustZone的探索还在继续，这次，换了一台机子，操作系统从Ubuntu 20.04 换成 Windows 10。

 

测试的步骤也变了：

1、先用STM32CubeProgrammer进行选项字节配置，再用独立的STM32CubeMX进行初始设置，然后从STM32CubeMX的提示中直接进入STM32CubeIDE。

2、将示例中的四段代码逐个输入，每输入一个进行一次build。

 

 

测试的结果是，问题出在第四段，也就是NS区域的第二段代码处。

 

 

本帖最后由 MianQi 于 2021-1-8 17:44 编辑

最新进展：Bulid的时候没有错，RUN的时候报错：

 

新的进展 —— 可以Run了：

于是，用户按键（User Button）也生效了：https://v.youku.com/v_show/id_XNTA3NDAxMDI2OA==.html

现正的问题是，不能实现串口通信，试了Putty和VS Code，两个都不能键盘输入，也没有对话。还在查找原因。