diff options
Diffstat (limited to 'src/jtag/zy1000/jtag_minidriver.h')
| -rw-r--r-- | src/jtag/zy1000/jtag_minidriver.h | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/src/jtag/zy1000/jtag_minidriver.h b/src/jtag/zy1000/jtag_minidriver.h index 3fe16ef3..afbea13a 100644 --- a/src/jtag/zy1000/jtag_minidriver.h +++ b/src/jtag/zy1000/jtag_minidriver.h @@ -30,8 +30,19 @@ int diag_printf(const char *fmt, ...); #define ZY1000_POKE(a, b) HAL_WRITE_UINT32(a, b); diag_printf("poke 0x%08x,0x%08x\n", a, b) #define ZY1000_PEEK(a, b) HAL_READ_UINT32(a, b); diag_printf("peek 0x%08x = 0x%08x\n", a, b) #else -#define ZY1000_POKE(a, b) HAL_WRITE_UINT32(a, b) #define ZY1000_PEEK(a, b) HAL_READ_UINT32(a, b) +#define ZY1000_POKE(a, b) HAL_WRITE_UINT32(a, b);\ + {/* This will flush the bridge FIFO. Overflowed bridge FIFO fails. We must \ + flush every "often". No precise system has been found, but 4 seems solid. \ + */ \ + static int overflow_counter = 0; \ + if (++overflow_counter >= 1) \ + { \ + /* clear FIFO */ \ + cyg_uint32 empty; ZY1000_PEEK(ZY1000_JTAG_BASE + 0x10, empty); \ + overflow_counter = 0; \ + } \ + } #endif // FIFO empty? |