https://forum.ytmicro.com/topic/1492/如何对编译生成的-hex-srec-s19-文件进行补全

WangPeiying 是的

luxiaoguo 再重新生成一下demo看看

看起来是空指针访问触发的BusFault。
VSCode在调试方面感觉还是没OZone好的，只是debug好看一些。

意思是如果A Block执行了写地址操作，但是后续并没有发Flash操作的命令，此时对B Block执行写地址操作，然后执行命令，此时命令会作用于两个Block。为了规避这种异常可以增加MPU保护，避免对Flash进行非预期的地址写操作，另外SDK和MCAL中也通过先执行NOP命令清除之前的写操作，这些都是可以规避这种异常现象的。

65cbf0b3df07ac3a30b2653c876f80ed.png

好的，这个rsa4096也是软件实现的吗？

Diga 在 YTM32B1MD14 - MPU Configuration - Can I grant permission rw-|r-- for a memory section? 中说：

ARMv7 can support your case. YTM32B1HA01's core is CORTEX-M7 with ARMv7.
b514bd3a-96f7-4073-8763-eca5918191c8-image.png

Thanks for your suggestion but unfortunately we can't change the chipset.

Is there any mechanism or any demo code to switch between Supervisor mode and User mode for YTM32B1MD14?

image.png

问题补充：
1、实验方法：
在系统电源12V上施加如下脉冲信号，循环施加次数：5000次；
image.png

2、正常情况：
MCU会随着测试脉冲周期（500ms），周期重启，MCU_3.3V和MCU_reset波形如下：
image.png

3、异常现象：
在试验过程中，有一台机器会概率出现卡死后无法重启（测试脉冲不停止），需停止测试脉冲，且系统供电12V掉电再上电，MCU方可重启！

请问，此异常是否因为MCU_3.3V触发POR功能导致的？假设MCU的电源保护触发后，怎样操作可以退出？

是CANTP吗？
CANTP 是按照 ISO 15765-2:2016 开发的，里面的时间参数不叫 P2，你可以对照着看看在 15765 定义的是什么。这里的 P2 应该是 N_Bs 时间

有个基于demo修改的增加函数
int aes_CFB_test(void) {
psa_status_t status;
psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
psa_key_id_t key_id = 0;
size_t output_length;
psa_cipher_operation_t operation = PSA_CIPHER_OPERATION_INIT;
uint8_t iv[16] = {
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f}; // Initialization vector for
// CFB mode

/* Set key attributes for AES-CFB*/
psa_set_key_usage_flags(&attributes,
(PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT));
psa_set_key_algorithm(&attributes, PSA_ALG_CFB);
psa_set_key_type(&attributes, PSA_KEY_TYPE_AES);
psa_set_key_bits(&attributes, 128);

/* Import the key*/
status = psa_import_key(&attributes, aes_key, sizeof(aes_key), &key_id);
if (status != PSA_SUCCESS) {
PRINTF("Key import failed! (status = %d)\n\r", status);
return status;
}

/* Performing encryption*/
CM33_DWT_Start(); // Start timing for encryption
status = psa_cipher_encrypt_setup(&operation, key_id, PSA_ALG_CFB);
if (status != PSA_SUCCESS) {
PRINTF("Encryption setup failed! (status = %d)\n\r", status);
psa_destroy_key(key_id);
return status;
}

status = psa_cipher_set_iv(&operation, iv, sizeof(iv));
if (status != PSA_SUCCESS) {
PRINTF("Setting IV failed! (status = %d)\n\r", status);
psa_cipher_abort(&operation);
psa_destroy_key(key_id);
return status;
}

status = psa_cipher_update(&operation, plaintext, sizeof(plaintext),
ciphertext, sizeof(ciphertext), &output_length);
if (status != PSA_SUCCESS) {
PRINTF("Encryption update failed! (status = %d)\n\r", status);
psa_cipher_abort(&operation);
psa_destroy_key(key_id);
return status;
}

status =
psa_cipher_finish(&operation, ciphertext + output_length,
sizeof(ciphertext) - output_length, &output_length);
if (status != PSA_SUCCESS) {
PRINTF("Encryption finish failed! (status = %d)\n\r", status);
psa_cipher_abort(&operation);
psa_destroy_key(key_id);
return status;
}

// Stop timing and calculate encryption time
uint32_t encryption_cycles = CM33_DWT_Stop();
PRINTF("AES CFB encryption took %u cycles\r\n", encryption_cycles);
PRINTF("CPU core clock frequency: %u Hz\r\n", cpu_freq);
PRINTF("AES CFB encryption time: %.6f seconds\r\n",
(float)encryption_cycles / cpu_freq);

print_buf("Key", aes_key, DATA_LENGTH);
print_buf("IV", iv, DATA_LENGTH);
print_buf("Plaintext", plaintext, DATA_LENGTH);
print_buf("Ciphertext", ciphertext, DATA_LENGTH);

/Performing decryption/
uint8_t decrypted[DATA_LENGTH];
status = psa_cipher_decrypt_setup(&operation, key_id, PSA_ALG_CFB);
if (status != PSA_SUCCESS) {
PRINTF("Decryption setup failed! (status = %d)\n\r", status);
psa_destroy_key(key_id);
return status;
}

status = psa_cipher_set_iv(&operation, iv, sizeof(iv));
if (status != PSA_SUCCESS) {
PRINTF("Setting IV failed! (status = %d)\n\r", status);
psa_cipher_abort(&operation);
psa_destroy_key(key_id);
return status;
}

status = psa_cipher_update(&operation, ciphertext, sizeof(ciphertext),
decrypted, sizeof(decrypted), &output_length);
if (status != PSA_SUCCESS) {
PRINTF("Decryption update failed! (status = %d)\n\r", status);
psa_cipher_abort(&operation);
psa_destroy_key(key_id);
return status;
}

status = psa_cipher_finish(&operation, decrypted + output_length,
sizeof(decrypted) - output_length, &output_length);
if (status != PSA_SUCCESS) {
PRINTF("Decryption finish failed! (status = %d)\n\r", status);
psa_cipher_abort(&operation);
psa_destroy_key(key_id);
return status;
}

print_buf("Decrypted", decrypted, DATA_LENGTH);

if (buf_cmp(plaintext, decrypted, DATA_LENGTH) != 0) {
PRINTF("Decryption failed! (status = %d)\n\r", status);
psa_destroy_key(key_id);
return -1;
}

/* Destroy the key*/
psa_destroy_key(key_id);
return 0;
}可以参考一下。
image.png

请问下能否做一个AES-CFB的demo？

@junhanhuang 在 LPTMR和LINFlex2同时打开，uart能发送数据，但是lptmr无法进入中断，超时判断卡主 中说：

这个是基于你的yct做的最简lptmr程序，我这边可以正常进中断，你刷这个代码试试
003.zip

添加ldf失败
image.png
16_BCM_R_LIN4_EP_v2.0.0-20251013.zip帮忙看一下这个ldf为啥不行

These two sections cannot be placed in the same MPU region. Specifically:

.cortst_ram_data_target0 should be placed in MPU_M33_PRIV_RWX_UNPRIV_RWX .cortst_ram_data_target1 should be placed in MPU_M33_PRIV_RW_UNPRIV_NONE

For more information, refer to CorTst_Demo. In the demo, the corresponding sections and their locations are as follows:

cdad0734-1b40-401c-a535-080746140f3a-image.png

eb69771a-637d-44c8-8648-be3662a64b1d-image.png

a0a520ff-226f-4746-848e-2bee31033565-image.png

云途MCAL配置与使用详解之CryptoDrivers模块.pdf这是MCAL crypto模块使用的一些解释，你看是否对你有帮助。

彻底断电，等待几分钟，让芯片内部电荷释放一下先。用万用表测下电源地间电阻，看看短路了没

ganyongchao 已解决，和配置项相关