299 lines
5.5 KiB
C
299 lines
5.5 KiB
C
|
|
#include <stdint.h>
|
|
// #include "uart.h"
|
|
// #include "gpio.h"
|
|
// #include "timer.h"
|
|
#include "custom_ops.S"
|
|
|
|
|
|
volatile uint32_t *cdr_status = (uint32_t*)( 0x000 + 0x0 ); //read
|
|
volatile uint32_t *cdr_txLen = (uint32_t*)( 0x000 + 0x4 ); //write
|
|
volatile uint32_t *cdr_txFifo = (uint32_t*)( 0x000 + 0x8 ); //write
|
|
volatile uint32_t *cdr_direct = (uint32_t*)( 0x000 + 0xc ); //write
|
|
|
|
volatile uint32_t *cdr_softReset = (uint32_t*)( 0x000 + 0x10 ); //write
|
|
volatile uint32_t *cdr_rxLen = (uint32_t*)( 0x000 + 0x18 ); //read
|
|
volatile uint32_t *cdr_rxFifo = (uint32_t*)( 0x000 + 0x1c ); //read
|
|
|
|
|
|
volatile uint32_t *WriteGpio = (uint32_t*) ( 0x400);
|
|
volatile uint32_t *ReadGpio = (uint32_t*) ( 0x400);
|
|
volatile uint32_t *ReadIsLast = (uint32_t*) ( 0x408);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// static inline void error() {
|
|
// while(1);
|
|
// }
|
|
|
|
|
|
|
|
|
|
void main()
|
|
{
|
|
uint32_t readDat;
|
|
uint32_t operator;
|
|
uint32_t downRecvLen;
|
|
uint32_t upRecvLen;
|
|
|
|
uint32_t slvNum;
|
|
uint32_t totNum;
|
|
|
|
uint32_t isLast;
|
|
|
|
asm volatile (
|
|
"li sp, 0\n"
|
|
".4byte 0x600600b\n"
|
|
);
|
|
|
|
while(1){
|
|
|
|
*cdr_softReset = 1; //复位脉冲
|
|
isLast = *ReadIsLast;
|
|
*cdr_direct = 0;
|
|
*WriteGpio = 0x01;
|
|
register uint32_t flag;
|
|
|
|
asm volatile (
|
|
"1:\n"
|
|
"andi %0, sp, 0x04\n"
|
|
"beqz %0, 1b\n"
|
|
"andi sp, sp, 0xFB\n"
|
|
: "+r"(flag)
|
|
);
|
|
|
|
readDat = *cdr_rxFifo;
|
|
operator = (readDat >> 16) & 0xf;
|
|
downRecvLen = readDat >> 20;
|
|
|
|
readDat = *cdr_rxFifo;
|
|
|
|
*WriteGpio = 0x03;
|
|
|
|
if( operator == 0 ){
|
|
|
|
|
|
uint32_t localLen = 8;
|
|
uint32_t downSendLen = downRecvLen - 8;
|
|
|
|
//接收本地包
|
|
for( uint32_t i = 0; i < 8/4; i++ ){
|
|
asm volatile (
|
|
"andi %0, sp, 0x08\n"
|
|
"1:\n"
|
|
"bnez %0, 1b\n" //error
|
|
: "+r"(flag)
|
|
);
|
|
readDat = *cdr_rxFifo;
|
|
}
|
|
|
|
*WriteGpio = 0x07;
|
|
|
|
if(!isLast){
|
|
// 下行转发新建包头
|
|
*cdr_txLen = downRecvLen; //downSendLen + 8
|
|
*cdr_txFifo = (downSendLen << 20) |( 0 << 16) | 0;
|
|
*cdr_txFifo = 0;
|
|
|
|
//下行转发负载
|
|
for( uint32_t i = 0; i < (downSendLen >> 2); i++ ){ //一次传4byte
|
|
register uint32_t forData;
|
|
asm volatile (
|
|
"andi %0, sp, 0x08\n"
|
|
"1:\n"
|
|
"bnez %0, 1b\n" //error 速度不够，不再检查接收
|
|
"lw %1, 0x01c(x0)\n"
|
|
"sw %1, 0x008(x0)\n"
|
|
: "+r"(flag), "+r"(forData)
|
|
);
|
|
//*cdr_0_tx_txFifo = *cdr_0_rx_rxFifo; //接收即发送
|
|
}
|
|
} else{ //isLast
|
|
|
|
//空转掉剩余负载
|
|
for( uint32_t i = 0; i < (downSendLen >> 2); i++ ){ //一次传4byte
|
|
register uint32_t forData;
|
|
asm volatile (
|
|
"andi %0, sp, 0x08\n"
|
|
"1:\n"
|
|
"bnez %0, 1b\n" //error 速度不够，不再检查接收
|
|
// "lui t0, %hi(0x40000000)\n"
|
|
"lw %1, 0x01c(x0)\n"
|
|
: "+r"(flag), "+r"(forData)
|
|
|
|
);
|
|
}
|
|
}
|
|
|
|
*WriteGpio = 0x0f;
|
|
//CRC
|
|
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)
|
|
);
|
|
*WriteGpio = 0x1f;
|
|
|
|
if(!isLast){
|
|
//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)
|
|
);
|
|
}
|
|
|
|
*WriteGpio = 0x3f;
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
*cdr_softReset = 1; //复位脉冲
|
|
*cdr_direct = 1; //方向转换
|
|
|
|
if(!isLast){
|
|
//上行转发
|
|
|
|
//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)
|
|
);
|
|
|
|
readDat = *cdr_rxFifo;
|
|
|
|
|
|
|
|
// operator = (readDat >> 16) & 0xf; //速度不够，不校验
|
|
upRecvLen = readDat >> 20;
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
//发送上行包头
|
|
*cdr_txLen = upRecvLen + 16; //upSendLen + 8
|
|
*cdr_txFifo = ((upRecvLen + 8) << 20) |( 0 << 16) | 0;
|
|
*cdr_txFifo = 0;
|
|
|
|
for( uint32_t i = 0; i < 8/4; i ++ ){
|
|
*cdr_txFifo = 0;
|
|
}
|
|
|
|
|
|
|
|
//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)
|
|
// );
|
|
|
|
uint32_t temp = *cdr_rxFifo;
|
|
|
|
//上行转发负载
|
|
for( uint32_t i = 0; i < (upRecvLen >> 2); i ++ ){ //一次传4byte
|
|
register uint32_t forData;
|
|
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"
|
|
"sw %1, 0x008(x0)\n"
|
|
:"+r"(flag), "+r"(forData)
|
|
);
|
|
|
|
// *cdr_1_tx_txFifo = *cdr_1_rx_rxFifo; //接收即发送
|
|
}
|
|
|
|
//CRC
|
|
asm volatile (
|
|
"andi %0, sp, 0x08\n"
|
|
"1:\n"
|
|
"bnez %0, 1b\n" //error
|
|
:"+r"(flag)
|
|
);
|
|
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)
|
|
);
|
|
|
|
totNum = slvNum + (upRecvLen >> 3) - 1;
|
|
} else { //islast
|
|
//发送上行包头
|
|
*cdr_txLen = 16; //upSendLen + 8
|
|
*cdr_txFifo = (8 << 20) |( 0 << 16) | 0;
|
|
*cdr_txFifo = 0;
|
|
|
|
for( uint32_t i = 0; i < 8/4; i ++ ){
|
|
*cdr_txFifo = 0;
|
|
}
|
|
|
|
|
|
}
|
|
|
|
//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)
|
|
);
|
|
|
|
slvNum = 64 - ( downRecvLen >> 3 );
|
|
*WriteGpio = 1 << slvNum;
|
|
|
|
} else if ( operator == 1 ){
|
|
// error();
|
|
} else if ( operator == 2 ){
|
|
// error();
|
|
} else {
|
|
// error();
|
|
}
|
|
}
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|