idchain.h

ARM核的边界扫描(JTAG)的实现,此代码在s3c2400上测试通过

//////////////////////////////////////////////////////////////////////////////
// IDChain                                                                  //
//////////////////////////////////////////////////////////////////////////////
class IDChain : public Chain
{
	public:
		unsigned one:1;					// 1
		unsigned manufacturer:11;		// 0x787
		unsigned productCode:16;		// 0x0920
		unsigned specificationRev:1;	// 1

		void Select() { JTAG::Command(IDCODE); }

		unsigned int Read()
		{
			Select();
			JTAG::Read(this);
			/*printf("one: %X\n", one);
			printf("manufacturer: %X\n", manufacturer);
			printf("productCode: %X\n", productCode);
			printf("specificationRev: %X\n", specificationRev);*/
			return *(unsigned int *)this;
		}
};