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Library Function Descriptions
memory_map_ concatenated with a valid memory name. As an example,
memory_map_pa refers to off-chip pa memory on the 96002 device. See Example 14-62.
Example 14-62. dsp_wmem_blk()
/* Copy 100 values in X:$c400 to P:$a000 */
#include "simcom.h"
#include "protocom.h"
#include "coreaddr.h"
int devn;
unsigned long address, count, memval[100];
memval=0L;
devn=0;
dsp_new(devn,"56002");/* Allocate structure for device 0, a 56002 */
address=0xc400;
dsp_rmem(devn,memory_map_x,address,100L,&memval[0]); /* fetch 100
values */
address=0xa000;
/* from X:$c400 */
dsp_wmem(devn,memory_map_p,address,100L,&memval[0]); /* and write to
P:$a000 */
14.2.63 dsp_wreg—Write a DSP Device Register
#include "simcom.h"
#include "protocom.h"
dsp_wreg(device_index,periph_num,reg_num,reg_val)
int device_index;
/* DSP device index to be affected by command */
int periph_num;/* DSP peripheral number */
int reg_num;/* DSP register number */
unsigned long *reg_val;/* Value to be written to register */
dsp_wreg() writes a selected register in the a DSP device.
Use the emulator "help reg" command to obtain a list of the valid periph_num and
reg_num values, and reg_val size for each register. Also, the function
dsp_findreg() can be used to obtain the peripheral and register number by using the
register name as a key.
If a register requires more than one word to represent the data value the least significant
word should be at [reg_val], with more significant words at [reg_val+1], etc. See
Example 14-63.
Motorola
Library Functions
14-57