M-Labs/artiq
2
0
Fork 2
mirror of https://github.com/m-labs/artiq.git synced 2024-12-24 19:04:02 +08:00
Code Issues Projects Releases Wiki Activity

soc/runtime: fix DDS programming

Browse Source
This commit is contained in:
Sebastien Bourdeauducq 2014-07-23 17:10:49 -06:00
parent b2bb837d22
commit 06cc9302f8
1 changed files with 31 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

45
soc/runtime/main.c
View File

@ -146,27 +146,27 @@ static void rtio_sync(int channel)
while(rtio_o_level_read() != 0);
}
#define DDS_FTW 0x0a
#define DDS_PTW 0x0e
#define DDS_FTW0 0x0a
#define DDS_FTW1 0x0b
#define DDS_FTW2 0x0c
#define DDS_FTW3 0x0d
#define DDS_FUD 0x40
#define DDS_GPIO 0x41
#define DDS_WRITE1(addr, data) \
#define DDS_READ(addr) \
MMPTR(0xb0000000 + (addr)*4)
#define DDS_WRITE(addr, data) \
MMPTR(0xb0000000 + (addr)*4) = data
#define DDS_WRITE2(addr, data) \
DDS_WRITE1(addr, (data) >> 8); \
DDS_WRITE1((addr) + 1, data)
#define DDS_WRITE4(addr, data) \
DDS_WRITE2(addr, (data) >> 16); \
DDS_WRITE2((addr) + 2, data)
static void dds_program(int channel, int ftw)
{
DDS_WRITE1(DDS_GPIO, channel);
DDS_WRITE4(DDS_FTW, ftw);
DDS_WRITE1(DDS_FUD, 0);
DDS_WRITE(DDS_GPIO, channel);
DDS_WRITE(DDS_FTW0, ftw & 0xff);
DDS_WRITE(DDS_FTW1, (ftw >> 8) & 0xff);
DDS_WRITE(DDS_FTW2, (ftw >> 16) & 0xff);
DDS_WRITE(DDS_FTW3, (ftw >> 24) & 0xff);
DDS_WRITE(DDS_FUD, 0);
}
static const struct symbol syscalls[] = {
@ -178,6 +178,22 @@ static const struct symbol syscalls[] = {
{NULL, NULL}
};
static void dds_init(void)
{
int i;
DDS_WRITE(DDS_GPIO, 1 << 7);
for(i=0;i<8;i++) {
DDS_WRITE(DDS_GPIO, i);
DDS_WRITE(0x00, 0x78);
DDS_WRITE(0x01, 0x00);
DDS_WRITE(0x02, 0x00);
DDS_WRITE(0x03, 0x00);
DDS_WRITE(DDS_FUD, 0);
}
}
typedef void (*kernel_function)(void);
int main(void)
@ -198,6 +214,7 @@ int main(void)
if(length > 0) {
if(load_elf(syscalls, kbuf, length, kcode, sizeof(kcode))) {
flush_cpu_icache();
dds_init();
rtio_reset_write(0);
k();
rtio_reset_write(1);