diff options
Diffstat (limited to 'src/jtag/zy1000/zy1000.c')
| -rw-r--r-- | src/jtag/zy1000/zy1000.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/src/jtag/zy1000/zy1000.c b/src/jtag/zy1000/zy1000.c index a2b88917..28c65b6e 100644 --- a/src/jtag/zy1000/zy1000.c +++ b/src/jtag/zy1000/zy1000.c @@ -468,6 +468,9 @@ int interface_jtag_execute_queue(void) */ zy1000_flush_readqueue(); + /* and handle any callbacks... */ + zy1000_flush_callbackqueue(); + if (zy1000_rclk) { /* Only check for errors when using RCLK to speed up @@ -1222,6 +1225,64 @@ void zy1000_flush_readqueue(void) readqueue_pos = 0; } +/* By queuing the callback's we avoid flushing the +read queue until jtag_execute_queue(). This can +reduce latency dramatically for cases where +callbacks are used extensively. +*/ +#define callbackqueue_size 128 +static struct callbackentry +{ + jtag_callback_t callback; + jtag_callback_data_t data0; + jtag_callback_data_t data1; + jtag_callback_data_t data2; + jtag_callback_data_t data3; +} callbackqueue[callbackqueue_size]; + +static int callbackqueue_pos = 0; + +void zy1000_jtag_add_callback4(jtag_callback_t callback, jtag_callback_data_t data0, jtag_callback_data_t data1, jtag_callback_data_t data2, jtag_callback_data_t data3) +{ + if (callbackqueue_pos >= callbackqueue_size) + { + zy1000_flush_callbackqueue(); + } + + callbackqueue[callbackqueue_pos].callback = callback; + callbackqueue[callbackqueue_pos].data0 = data0; + callbackqueue[callbackqueue_pos].data1 = data1; + callbackqueue[callbackqueue_pos].data2 = data2; + callbackqueue[callbackqueue_pos].data3 = data3; + callbackqueue_pos++; +} + +static int zy1000_jtag_convert_to_callback4(jtag_callback_data_t data0, jtag_callback_data_t data1, jtag_callback_data_t data2, jtag_callback_data_t data3) +{ + ((jtag_callback1_t)data1)(data0); + return ERROR_OK; +} + +void zy1000_jtag_add_callback(jtag_callback1_t callback, jtag_callback_data_t data0) +{ + zy1000_jtag_add_callback4(zy1000_jtag_convert_to_callback4, data0, (jtag_callback_data_t)callback, 0, 0); +} + +void zy1000_flush_callbackqueue(void) +{ + /* we have to flush the read queue so we have access to + the data the callbacks will use + */ + zy1000_flush_readqueue(); + int i; + for (i = 0; i < callbackqueue_pos; i++) + { + struct callbackentry *entry = &callbackqueue[i]; + jtag_set_error(entry->callback(entry->data0, entry->data1, entry->data2, entry->data3)); + } + callbackqueue_pos = 0; +} + static void writeShiftValue(uint8_t *data, int bits) { waitIdle(); |