diff options
Diffstat (limited to 'src/target')
| -rw-r--r-- | src/target/cortex_m3.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/src/target/cortex_m3.c b/src/target/cortex_m3.c index 8e8665bc..3a567aba 100644 --- a/src/target/cortex_m3.c +++ b/src/target/cortex_m3.c @@ -1372,8 +1372,12 @@ int cortex_m3_dcc_read(swjdp_common_t *swjdp, u8 *value, u8 *ctrl) /* write ack back to software dcc register * signify we have read data */ - dcrdr = 0; - ahbap_write_buf_u16( swjdp, (u8*)&dcrdr, 1, DCB_DCRDR); + if (dcrdr & (1 << 0)) + { + dcrdr = 0; + ahbap_write_buf_u16( swjdp, (u8*)&dcrdr, 1, DCB_DCRDR); + } + return ERROR_OK; } @@ -1413,10 +1417,11 @@ int cortex_m3_handle_target_request(void *priv) cortex_m3_dcc_read(swjdp, &data, &ctrl); /* check if we have data */ - if (ctrl & (1<<0)) + if (ctrl & (1 << 0)) { u32 request; + /* we assume target is quick enough */ request = data; cortex_m3_dcc_read(swjdp, &data, &ctrl); request |= (data << 8); |