Hello,
I'm using the OMAP3530 board running Linux2.6 with mcbsp_test module.
when I run the insmod mcbsp_test.ko,
I want to sent a word once, but it sent the word repeatedly, and I can see the DX,CLKX and FSXsignals on scope,but DX always sent word repeatedly.,however I only sent it once,
I think that the FSX and CLKX are working,but the DX's running is out of my control.
see below the code modification ,you will find the mistake if is as my thought, thanks.
#include <plat/mcbsp.h>
static int _init mcbsp_init(void)
{
struct omap_mcbsp_reg_cfg mcbsp_cfg;
u32 reg,*DEVCONF;
*DEVCONF=(u32*)ioremap(CM_FCLKEN1_CORE,4);
reg=*DEVCONF;
reg|=(1<<9);
*DEVCONF=reg;//functional clock enable
iounmap((void*)DEVCONF);
omap_mcbsp_set_io_type(OMAP_MCBSP1,OMAP_MCBSP_POLL_IO);
omap_mcbsp_request(OMAP_MCBSP1);
memset(&mcbsp_cfg,0.sizeof(struct omap_mcbsp_reg_cfg));
omap_mcbsp_config(OMAP_MCBSP1,&mcbsp_cfg);//mcbsp reset
mcbsp_cfg.spcr2|=XRST|FRST|GRST|XINTM(2);//TX ENABLE
mcbsp_cfg.xcr1|=XWDLEN1(5)|XFRLEN1(0);//TX WORD
mcbsp_cfg.srgr|=CLKGDV(80)|FWID(0);//SRG CLOCK divide
mcbsp_cfg.srgr2|=FSGM|FPER(0x1f);
mcbsp_cfg.pcr0|=CLKXM|CLKRM|FSXM|FSRM|FSXP|FSRP|CLKXP|CLKRP;//TX MASTER
omap_mcbsp_config(OMAP_MCBSP1,&mcbsp_cfg);
*DEVCONF=(u32*)ioremap(MCBSPLP_DXR_REG,4);
*DEVCONF=0x5;//send a date
iounmap((void*)DEVCONF);
register_chrdev(192,"mcbsp",&mcbsp_fops);
return 0;
}
