此例为对csl的直接调用。
实现功能：打开并初始化EDMA_CHA_GPINT11通道，使用寄存器配置方式从src到dst数据表格的拷贝。
传输数据量：16个16位单字。
myhedma=EDMA_open(EDMA_CHA_GPINT11,EDMA_OPEN_RESET);
//open edma .
EDMA_config(myhedma,&myconfig);
//configure edma.
EDMA_enableChannel(myhedma);
打开并配置edma。
因edma与dma不同，他基于事件触发，所以我们手工写edma事件置位寄存器让其工作。如下
EDMA_setChannel(myhedma);
等待EVM642_wait(1000);
最后检验是否被正确搬移并关闭edma
for(I=0;I<=N-1;I++){
if(dst[I]!=0xBEEFu)
{++err;}
EDMA_close(myhedma);
点击ccs的view菜单的watch window，打开watch window窗口，运行程序，在watch1下输入src及dst可以看到已正确拷贝。
TIMER程序
本程序从ASK_DEFAULT,
IRQ_IEMASK_DEFAULT
};
第一个为中断函数地址，This is the address of the interrupt service routine to be called when the interrupt happens. This function must be C-callable and must NOT be declared using the interrupt keyword.
第二个为函数传递参数。第3个为Cache control mask: 决定DSP/BIOS dispatcher处理cache 设置，可选模式具体见csl文档。
。第4个Interrupt enable mask。决定处理中断时how interrupts are masked。有三种选择
Use IRQ_IEMASK_ALL to mask out all interrupts including self,屏蔽所有中断，use IRQ_IEMASK_SELF to mask self (prevent an ISR from preempting itself), or use the default which is the same as IRQ_IEMASK_SELF。
IRQ_setVecs(myIvtTable);
设置中断向量基地址
eventId=TIMER_getEventId(hTimer1);
获取timer1的irq 事件id号。
IRQ_config(eventId,&myConfig);
配置该irq。
IRQ_enable(eventId);
IRQ_globalEnable();
使能中断。
该程序中的timer1在dsp/bios中的配置如上一程序。
interrupt void myIsr()
上面指定的中断函数。注意前面应加上interrupt。程序中为空，可以根据需要加上相关代码。
mian.c代码
#include <csl.h>
#include <csl_irq.h>
#include <csl_timer.h>
#include "Config1cfg.h"
#define NVECTORS 256
#pragma DATA_SECTION(myIvtTable,".myvec")
int myIvtTable[NVECTORS];
interrupt void myIsr();
IRQ_Config myConfig = {
myIsr,
0x00000000,
IRQ_CCMASK_DEFAULT,
IRQ_IEMASK_DEFAULT
};
main(){
Uint16 eventId;
int old_intm;
old_intm=IRQ_globalDisable();
IRQ_setVecs(myIvtTable);
eventId=TIMER_getEventId(hTimer1);
IRQ_config(eventId,&myConfig);
IRQ_clear(eventId);
IRQ_enable(eventId);
IRQ_globalRestore(old_intm);
TIMER_start(hTimer1);
IRQ_globalEnable();
}
interrupt void myIsr()
{
}
Config1cfg.h代码
/* Do *not* directly modify this file. It was */
/* generated by the Configuration Tool; any */
/* changes risk being overwritten. */
/* INPUT Config1.cdb */
#define CHIP_DM642 1
/* Include Header Files */
#include <std.h>
#include <hst.h>
#include <swi.h>
#include <tsk.h>
#include <log.h>
#include <sts.h>
#ifdef __cplusplus
extern "C" {
#endif
extern far HST_Obj RTA_fromHost;
extern far HST_Obj RTA_toHost;
extern far SWI_Obj KNL_swi;
extern far SWI_Obj SWI0;
extern far TSK_Obj TSK_idle;
extern far LOG_Obj LOG_system;
extern far STS_Obj IDL_busyObj;
extern far void CSL_cfgInit();
#ifdef __cplusplus
}
#endif /* extern "C" */
Config1cfg_c.c代码
/* Do *not* directly modify this file. It was */
/* generated by the Configuration Tool; any */
/* changes risk being overwritten. */
/* INPUT Config1.cdb */
/* Include Header File */
#include "Config1cfg.h"
#ifdef __cplusplus
#pragma CODE_SECTION(".text:CSL_cfgInit")
#else
#pragma CODE_SECTION(CSL_cfgInit,".text:CSL_cfgInit")
#endif
#ifdef __cplusplus
#pragma FUNC_EXT_CALLED()
#else
#pragma FUNC_EXT_CALLED(CSL_cfgInit)
#endif
/* Config Structures */
/* Handles */
/*
* ======== CSL_cfgInit() ========
*/
void CSL_cfgInit()
{
}
main.c代码
#include <csl.h>
#include <csl_edma.h>
#define N 16
#pragma DATA_SECTION(src,".damMem")
//PUT SRC IN DMAMEM SECTION
#pragma DATA_ALIGN(src,256)
//align src
Uint16 src[N]={
0xBEEFu,0xBEEFu,0xBEEFu,0xBEEFu,0xBEEFu,0xBEEFu,0xBEEFu,0xBEEFu,0xBEEFu,
0xBEEFu,0xBEEFu,0xBEEFu,0xBEEFu,0xBEEFu,0xBEEFu,0xBEEFu,};
#pragma DATA_SECTION(dst,".dmaMem")
Uint16 dst[N];
EDMA_Config myconfig={
EDMA_OPT_RMK(
EDMA_OPT_PRI_LOW,//edma privilege
EDMA_OPT_ESIZE_16BIT,//
EDMA_OPT_2DS_NO,
EDMA_OPT_SUM_INC,
EDMA_OPT_2DD_NO,
EDMA_OPT_DUM_INC,
EDMA_OPT_TCINT_NO,
EDMA_OPT_TCC_OF(0),
EDMA_OPT_TCCM_OF(0),
EDMA_OPT_ATCINT_NO,
EDMA_OPT_ATCC_OF(0),
EDMA_OPT_PDTS_DEFAULT,
EDMA_OPT_PDTD_DEFAULT,
EDMA_OPT_LINK_NO,
EDMA_OPT_FS_YES
),
EDMA_SRC_OF(&src[0]),
EDMA_CNT_OF(N),
EDMA_DST_OF(&dst[0]),
EDMA_IDX_OF(0x00000002),
EDMA_RLD_OF(0x00000000)
};
//parameter of edma
void taskFunc(void);
//announce of task
void main(){
CSL_init();
//if you want to use csl modules ,csl_init() function must be called first.
taskFunc();
//start taskfunc()
}
void taskFunc(void){
Uint16 err=0;
//the number of wrong member
Uint16 I;
EDMA_Handle myhedma;
//edma handle
myhedma=EDMA_open(EDMA_CHA_GPINT11,EDMA_OPEN_RESET);
//open edma .
EDMA_config(myhedma,&myconfig);
//configure edma.
EDMA_enableChannel(myhedma);
EDMA_setChannel(myhedma);
//soft trigger an EDMA channel
EVMDM642_wait(1000);
//wait
for(I=0;I<=N-1;I++){
if(dst[I]!=0xBEEFu)
{++err;}
//judge
}
EDMA_close(myhedma);//close the edma
}
