eb001/tb/sw/src/MstMain.c

#include <stdint.h>
// #include "uart.h"
// #include "gpio.h"
// #include "timer.h"
#include "tl2cdr.h"

volatile uint32_t *plic_priority_3   = (uint32_t*)( 0xc000000U + 0X000004 * 3);
volatile uint32_t *plic_priority_4   = (uint32_t*)( 0xc000000U + 0X000004 * 4);
volatile uint32_t *plic_priority_5   = (uint32_t*)( 0xc000000U + 0X000004 * 5);
volatile uint32_t *plic_priority_6   = (uint32_t*)( 0xc000000U + 0X000004 * 6);


volatile uint32_t *plic_pending_0_31 = (uint32_t*)( 0xc000000U + 0X001000 );
volatile uint32_t *plic_enable_0_31  = (uint32_t*)( 0xc000000U + 0X002000 );

volatile uint32_t *plic_threshold_0  = (uint32_t*)( 0xc000000U + 0X200000 );
volatile uint32_t *plic_claim        = (uint32_t*)( 0xc000000U + 0X200004 );


volatile uint32_t flag_intTxEnd = 0;
volatile uint32_t flag_intRxError = 0;
volatile uint32_t flag_intRxStart = 0;
volatile uint32_t flag_intRxEnd = 0;


void plic_handle(){

	
	// 从 PLIC 中获取中断源 ID
    uint32_t claim = *plic_claim;


	if( claim == 3 ){
		flag_intTxEnd = 1;
	} else if( claim == 4 ){
		flag_intRxError = 1;
	} else if( claim == 5 ){
		flag_intRxStart = 1;
	} else if( claim == 6 ){
		flag_intRxEnd = 1;
	}

    // 通知 PLIC 完成中断处理
    *plic_claim = claim;
	return;
}



	 
static inline void error() {
    while(1);
}


// extern volatile uint32_t *cdr_status = (uint32_t*)( TL2CDR_BASE + CDR_ReadStatus ); //read
// extern volatile uint32_t *cdr_txLen  = (uint32_t*)( TL2CDR_BASE + CDR_WriteTxLen ); //write
// extern volatile uint32_t *cdr_txFifo = (uint32_t*)( TL2CDR_BASE + CDR_WriteTxFifo ); //write
// extern volatile uint32_t *cdr_direct = (uint32_t*)( TL2CDR_BASE + CDR_WriteTransDir ); //write
// extern volatile uint32_t *cdr_softReset = (uint32_t*)( TL2CDR_BASE + CDR_WriteSoftReset ); //write
// extern volatile uint32_t *cdr_rxLen     = (uint32_t*)( TL2CDR_BASE + CDR_ReadRxLen ); //read
// extern volatile uint32_t *cdr_rxFifo    = (uint32_t*)( TL2CDR_BASE + CDR_ReadRxFifo ); //read



void main()
{
	uint32_t readDat;
	uint32_t operator;
	uint32_t downRecvLen;
	uint32_t upRecvLen;

	uint32_t slvNum;
	uint32_t totNum;

	uint32_t isLast;

	uint32_t led = 0;

	*plic_enable_0_31 = 1 << 3 | 1 << 4 | 1 << 5 | 1 << 6;
	*plic_priority_3 = 1;
	*plic_priority_4 = 1;
	*plic_priority_5 = 1;
	*plic_priority_6 = 1;
	*plic_threshold_0 = 0;


		*cdr_softReset = 1; //复位脉冲
		*cdr_direct = 0;

		register uint32_t flag;

									// asm volatile ( //timer 2s
									// 	"1:\n"
									// 	"rdcycle %0\n"
									// 	// "srli %0, %0, 12\n"
									// 	"srli %0, %0, 27\n"
									// 	// "srli %0, %0, 26\n"
									// 	"andi %0, %0, 0x1\n"
									// 	"beqz %0, 1b\n"
									// 	:"+r"(flag)
									// );

		// if( led ){
		// 	*WriteGpio = 0xFFFFFFFF;
		// 	led = 0;
		// } else{
		// 	*WriteGpio = 0x0;
		// 	led = 1;		
		// }


		//发送下行包头
		*cdr_txLen = 520; //总长520
		*cdr_txFifo = (512 << 20) |( 0 << 16) | 0x0000; //负载长度512，操作数0， 参数全0
		*cdr_txFifo = 0x00000000;

		for( uint32_t i = 0; i < 512/4; i ++ ){
			*cdr_txFifo = 0x00000000;
		}

		//等待发送完成标志
								// asm volatile (
								// 	"1:\n"
								// 	"andi %0, sp, 0x01\n"
								// 	"beqz %0, 1b\n"
								// 	"andi sp, sp, 0xFE\n"
								// 	:"+r"(flag)
								// );

		while( !flag_intTxEnd );
		flag_intTxEnd = 0;





		*cdr_softReset = 1; //复位脉冲
		*cdr_direct = 1;    //方向切换上行

		//接收第一个包
									// asm volatile (
									// 	"1:\n"
									// 	"andi %0, sp, 0x04\n"
									// 	"beqz %0, 1b\n"
									// 	"andi sp, sp, 0xFB\n"
									// 	:"+r"(flag)
									// );
		while(!flag_intRxStart);
		flag_intRxStart = 0;
				
		readDat = *cdr_rxFifo;	



		// operator = (readDat >> 16) & 0xf; //速度不够，不校验
		upRecvLen = readDat >> 20;


		//接收第二个包
									// asm volatile (
									// 	"andi %0, sp, 0x08\n"
									// 	"1:\n"
									// 	"bnez %0, 1b\n" //error //速度不够，不校验
									// :"+r"(flag),
									// );
		if( flag_intRxError ){
			while(1);
		}

		uint32_t temp = *cdr_rxFifo;

		//上行转发负载
		for( uint32_t i = 0; i < (upRecvLen >> 2); i ++ ){ //一次传4byte

			if( flag_intRxError ){
				while(1);
			}
												// register uint32_t upData;
												// asm volatile (
												// 	"andi %0, sp, 0x80\n"
												// 	"1:\n"
												// 	"bnez %0, 1b\n" //error 速度不够，不再检查接收
												// 	"lw %1, 0x01c(x0)\n"
												// 	:"+r"(flag), "+r"(upData)
												// );
		}

		//CRC
		if( flag_intRxError ){
			while(1);
		}
												// asm volatile (
												// 	"andi %0, sp, 0x08\n"
												// 	"1:\n"
												// 	"bnez %0, 1b\n" //error
												// 	:"+r"(flag)
												// );
		uint32_t crc = *cdr_rxFifo; //CRC

		//等待接收完成标志
												// asm volatile (
												// 	"1:\n"
												// 	"andi %0, sp, 0x08\n"
												// 	"beqz %0, 1b\n"
												// 	"andi sp, sp, 0xF7\n"
												// 	:"+r"(flag)
												// );
		
		while(!flag_intRxEnd);
		flag_intRxEnd = 0;

		totNum = (upRecvLen >> 3);


}