Hallo!
I'm trying to communicate between the TMS320C6713 DSK and my custom daughtercard through EMIF in the CE3 address space. I implemented an asynchronous 16 bit flash interface on the daughtercard (FPGA) similar to the one described in SPRA568A, p.10, figure 7.
I do the following to configure EMIF at DSP side:
void initEMIF(void)
{
Uint32 gblctl = EMIF_GBLCTL_RMK(
EMIF_GBLCTL_NOHOLD_ENABLE,
EMIF_GBLCTL_EKEN_ENABLE,
EMIF_GBLCTL_CLK1EN_DEFAULT,
EMIF_GBLCTL_CLK2EN_DEFAULT
);
Uint32 cectl = EMIF_CECTL_RMK(
EMIF_CECTL_WRSETUP_DEFAULT,
EMIF_CECTL_WRSTRB_DEFAULT,
EMIF_CECTL_WRHLD_DEFAULT,
EMIF_CECTL_RDSETUP_DEFAULT,
EMIF_CECTL_TA_DEFAULT,
EMIF_CECTL_RDSTRB_DEFAULT,
EMIF_CECTL_MTYPE_ASYNC16,
EMIF_CECTL_RDHLD_DEFAULT
);
EMIF_configArgs(
EMIF_GBLCTL_OF(gblctl), /* global control */
EMIF_CECTL_DEFAULT, /* CE0 control */
EMIF_CECTL_DEFAULT, /* CE1 control */
EMIF_CECTL_DEFAULT, /* CE2 control */
EMIF_CECTL_OF(cectl), /* CE3 control */
EMIF_SDCTL_DEFAULT, /* SDRAM control */
EMIF_SDTIM_DEFAULT, /* SDRAM timing */
EMIF_SDEXT_DEFAULT /* SDEXT */
);
}
But when I try to read from that interface there is no signal measureable on the J4 connector (EMIF signals).
while (1) {
values[i] = *(0xB0000000);
i = (i+1)%128;
}
I expected at least the ACE3# (chip select) or AARE# (read enable) to toggle while reading. When I write to the same address AAWE# is also not toggling.
Do you see the mistake I make? Is there some "global emif enable" I'm missing?
