想问一下大家这个28377并行启动方式16位数据传回到哪个地方了啊,通过哪几个管脚传回主机?并行启动是直接把需要烧写的程序写到flash里面吗,需不需要引导例程?
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parallel mode的引脚是GPIO58 -GPIO63, GPIO64-GPIO65
The parallel general purpose I/O (GPIO) boot mode asynchronously transfers code from GPIO58 -GPIO63, GPIO64-GPIO65 to internal memory
您可以看一下Figure 4-18. Parallel GPIO Mode Overview中在获取有效的key并读取入口地址之后会调用CopyData
而有关copydata的说明如下
Each of the bootloaders uses the same function to copy data from the port to the DSP SARAM. This function is the CopyData() function. This function uses a pointer to a GetWordData function that is initialized by each of the loaders to properly read data from that port.
每个引导加载程序使用相同的功能将数据从端口复制到DSP SARAM。也就是CopyData函数。此函数使用指向GetWordData函数的指针来读取该端口的数据。
其中bootloader接收的数据是存储在RAM中的