diff options
| -rw-r--r-- | fpga/serial/common/remote_access.v | 71 |
1 files changed, 55 insertions, 16 deletions
diff --git a/fpga/serial/common/remote_access.v b/fpga/serial/common/remote_access.v index b7f0592..6d14ed4 100644 --- a/fpga/serial/common/remote_access.v +++ b/fpga/serial/common/remote_access.v @@ -144,12 +144,27 @@ module remote_access( reg [17:0] digit_blanker_3 = 0; reg [17:0] digit_blanker_4 = 0; + reg [3:0] digit_activity_counter_1 = 0; + reg [3:0] digit_activity_counter_2 = 0; + reg [3:0] digit_activity_counter_3 = 0; + reg [3:0] digit_activity_counter_4 = 0; + reg [7:0] led_segment_bus_latch; + reg [7:0] led_segment_bus_latch_1; + reg [7:0] led_segment_bus_latch_2; + reg [7:0] led_segment_bus_latch_3; + reg [7:0] led_segment_bus_latch_4; reg [3:0] led_digit_select_latch; + reg [3:0] led_digit_select_latch_prev; always @(negedge clk_div_by_eight) begin - led_segment_bus_latch = led_segment_bus; - led_digit_select_latch = led_digit_select; + led_segment_bus_latch <= led_segment_bus_latch_4; + led_segment_bus_latch_4 <= led_segment_bus_latch_3; + led_segment_bus_latch_3 <= led_segment_bus_latch_2; + led_segment_bus_latch_2 <= led_segment_bus_latch_1; + led_segment_bus_latch_1 <= led_segment_bus; + led_digit_select_latch <= led_digit_select; + led_digit_select_latch_prev <= led_digit_select_latch; if (led_digit_select_latch[0] == 1) begin digit_blanker_1 = digit_blanker_1 + 1; @@ -167,24 +182,48 @@ module remote_access( digit_blanker_4 = digit_blanker_4 + 1; end - if (led_digit_select_latch[0] == 0) begin - led_display_bytes[0] = led_segment_bus_latch; - digit_blanker_1 = 0; + if ((led_digit_select_latch[0] == 0) && (led_digit_select_latch_prev[0] == 0)) begin + if (digit_activity_counter_1 > 6) begin + led_display_bytes[0] = led_segment_bus_latch; + digit_blanker_1 = 0; + end else begin + digit_activity_counter_1 <= digit_activity_counter_1 + 1; + end + end else begin + digit_activity_counter_1 <= 0; end - - if (led_digit_select_latch[1] == 0) begin - led_display_bytes[1] = led_segment_bus_latch; - digit_blanker_2 = 0; + + if ((led_digit_select_latch[1] == 0) && (led_digit_select_latch_prev[1] == 0)) begin + if (digit_activity_counter_2 > 6) begin + led_display_bytes[1] = led_segment_bus_latch; + digit_blanker_2 = 0; + end else begin + digit_activity_counter_2 <= digit_activity_counter_2 + 1; + end + end else begin + digit_activity_counter_2 <= 0; end - if (led_digit_select_latch[2] == 0) begin - led_display_bytes[2] = led_segment_bus_latch; - digit_blanker_3 = 0; + if ((led_digit_select_latch[2] == 0) && (led_digit_select_latch_prev[2] == 0)) begin + if (digit_activity_counter_3 > 6) begin + led_display_bytes[2] = led_segment_bus_latch; + digit_blanker_3 = 0; + end else begin + digit_activity_counter_3 <= digit_activity_counter_3 + 1; + end + end else begin + digit_activity_counter_3 <= 0; end - - if (led_digit_select_latch[3] == 0) begin - led_display_bytes[3] = led_segment_bus_latch; - digit_blanker_4 = 0; + + if ((led_digit_select_latch[3] == 0) && (led_digit_select_latch_prev[3] == 0)) begin + if (digit_activity_counter_4 > 6) begin + led_display_bytes[3] = led_segment_bus_latch; + digit_blanker_4 = 0; + end else begin + digit_activity_counter_4 <= digit_activity_counter_4 + 1; + end + end else begin + digit_activity_counter_4 <= 0; end if (digit_blanker_1 > 128000) begin |