#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "global.h"
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#include "spi.h"
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#include "scene.h"
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#include "queue.h"
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#define SPIB_CS 1
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extern void* hrx_que,*htx_que;
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void spi_dma_isr(int ui);
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void spi_int_isr(int ui);
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void spi_poll(void);
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typedef volatile struct{
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spi_status_e status;
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spi_direction_e direction;
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short spi_buff[SPI_PKT_SIZE];
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}spi_event,*pspi_event;
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static spi_event spi;
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void spi_init(int mode)//int id,int cs,int master,edevice_manner mode
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{
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*pSPICTL = 0 ;
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*pSPIFLG = 0;
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*pSPISTAT= 0x56;
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*pSPIDMAC = 0;
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*pSPIBAUD = 0;
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switch(mode){
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case DEVICE_POLL:
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*pSPICTL = (SPIEN | WL16 | MSBF | CPHASE |GM);
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// spi_poll();
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break;
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case DEVICE_INT:
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interrupts(SIG_P1, spi_int_isr);
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*pSPICTL = (SPIEN | WL16 | MSBF | CPHASE |SENDZ );
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break;
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case DEVICE_DMA:
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interrupts(SIG_P1, spi_dma_isr);
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spi_config_dma(spi_rx);
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break;
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}
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}
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spi_status_e spi_get_status()
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{
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return spi.status;
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}
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void* spi_get_buffer()
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{
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return (void*)spi.spi_buff;
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}
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spi_direction_e spi_get_direction()
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{
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return spi.direction;
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}
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void spi_config_dma(spi_direction_e direction)
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{
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//change receive to a new dma
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if(spi.direction==spi_tx){
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*pSPICTL = 0;
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*pSPIDMAC = 0;
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*pSPISTAT = 0x56;
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}
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else if(spi.direction==spi_rx){
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*pSPICTL = 0;
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*pSPIDMAC = 0x00000080;
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*pSPISTAT = 0x56;
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}
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*pIISPI = (int)spi.spi_buff;
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*pIMSPI = 1;
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*pCSPI = SPI_PKT_SIZE;
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*pSPICTL = (SPIEN | WL16 | LSBF | TIMOD2| CPHASE |CLKPL |GM );
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if(direction==spi_tx){
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*pSPIDMAC = SPIDEN | INTEN |INTETC ;
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}
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else if(direction==spi_rx){
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*pSPIDMAC = SPIDEN | SPIRCV | INTEN |INTETC ;
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}
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spi.direction = direction;
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spi.status = spi_processing;
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}
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void spi_int_isr(int ui)
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{
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}
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extern void* htx_que,*hrx_que;
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void spi_dma_isr(int ui)
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{
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*pSPICTL = 0; //½ûÖ¹SPI £¬·ñÔò¿ÉÄܵ¼ÖÂËÀ»ú
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spi.status = spi_completed;
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SRU(LOW,DPI_PB11_I); //֪ͨMCU Í£Ö¹SPIͨÐÅ
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/* if(spi.direction==spi_rx){
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queue_push(hrx_que,spi.spi_buff,SPI_PKT_SIZE);
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}
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//ÅжϷ¢ËͲ»ÄÜ·ÅÔÚÕâÀÒòΪ¸Ã´¥·¢¿¿Öжϣ¬
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//¼ÙÉèÀ´Ò»¸ö°ü£¬´¦ÀíÍêºóDSPÐèÒª·¢ËÍ£¬ÐèÒªÀ´µÚ¶þ¸ö°ü²ÅÄܱä³É·¢ËÍģʽ
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if(queue_count(htx_que)>=SPI_PKT_SIZE){
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//·¢ËͶÓÁв»¿ÕÅäÖóɷ¢ËÍģʽ
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queue_pop(htx_que,spi.spi_buff,SPI_PKT_SIZE);
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spi_config_dma(spi_tx);
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SRU(LOW,DPI_PB11_I);
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}
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else{
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spi_config_dma(spi_rx);
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SRU(HIGH,DPI_PB11_I);
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}
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// SRU(LOW,DPI_PB12_I);//֪ͨMCU SPI¿ÉÓÃ
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*/
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}
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int spi_xfer(short *pin,const short* pout,int len)
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{
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int i;
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for(i=0;i<len;i++){
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//trasimit
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if(pout){
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*pTXSPI = pout[i] ;
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}
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while (*pSPISTAT & TXS);
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//receive
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while(!(*pSPISTAT & RXS));
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if(pin){
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pin[i] = *pRXSPI;
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}
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else{
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*pRXSPI;
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}
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}
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Delay(10);
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return 0;
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}
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/*
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short wbuf[256][64];
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short wr=0;
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void spi_poll()
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{
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short tbuf[64];
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while(1){
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spi_xfer(tbuf,tbuf,64);
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memcpy(wbuf[wr++],tbuf,64);
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if(wr>=256){
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wr=0;
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}
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};
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}
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*/
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