Change clock from 12 to 25.

test/sim/hellow/main.c

@@ -3,7 +3,7 @@
 #include "tb_cxxrtl_io.h"
 #include "uart.h"
 
-#define CLK_FREQ_MHZ 12
+#define CLK_FREQ_MHZ 25
 
 // __attribute__((optimize("O0"))) 
 int main() {

test/sim/soc_cxxrtl/Makefile

@@ -44,6 +44,9 @@ $(BUILD_DIR)/soc.svf : $(BUILD_DIR)/soc.bit
 prog: $(BUILD_DIR)/soc.bit
 	ecpdap program $(BUILD_DIR)/soc.bit
 
+# prog: ${TARGET}.svf
+# 	./dapprog blink.svf
+
 flash: $(BUILD_DIR)/soc.bit
 	ecpdap flash write $(BUILD_DIR)/soc.bit
 

test/sim/soc_cxxrtl/cmsisdap.cfg

@@ -0,0 +1,29 @@
+#
+# Buspirate with OpenOCD support
+#
+# http://dangerousprototypes.com/bus-pirate-manual/
+#
+# http://www.fabienm.eu/flf/15-ecp5-board-kit/
+# https://github.com/Martoni/blp/tree/master/platforms/colorlight
+# https://github.com/HarmonInstruments/JTAG_SWD
+
+adapter driver cmsis-dap
+
+transport select jtag
+
+adapter speed 10
+
+# jtag newtap ecp5 tap -irlen 8 -expected-id 0x41111043
+
+#LFE5U-25F 0x41111043
+#LFE5U-45F 0x41112043
+jtag newtap ecp5 tap -irlen 8
+
+#init
+#scan_chain
+#
+#svf -tap ecp5.tap -quiet -progress blink.svf
+#exit
+
+# this depends on the cable, you are safe with this option
+#reset_config srst_only

test/sim/soc_cxxrtl/dapprog

@@ -0,0 +1,54 @@
+#!/bin/bash
+
+if [ ${#1} -eq 0 ]; then
+    echo "usage: dapprog xxx.bit or xxx.svf"
+    exit 0
+fi
+
+CURRENT_DIR=$(cd $(dirname $0); pwd)
+CONFIG=${CURRENT_DIR}/cmsisdap.cfg
+
+if [ "$1" == "--probe" ] || [ "$1" == "-p" ]; then
+    #probe add -d4 for detail log
+    sudo openocd -f ${CONFIG} -c \
+    "   init;
+        scan_chain;
+        exit;
+    "
+    exit $?
+
+else
+    # program 
+    IMAGE_FILE=$1
+    
+    EXT="${IMAGE_FILE##*.}"
+    echo EXT: $EXT
+    
+    #flash write_image erase xxx.hex;
+    #flash write_image erase xxx.bin 0x08000000;
+    
+    if [ "${EXT}" == "svf" ]; then
+        TARGET="$IMAGE_FILE"
+    elif [ "${EXT}" == "bit" ]; then
+        NAME="${IMAGE_FILE%%.bit}"
+        #/home/pi/oss/ulx3s/tools/ujprog/ujprog -j SRAM  ${IMAGE_FILE} > ${NAME}_sram.svf
+        ${CURRENT_DIR}/ujprog.bit2svf -j FLASH ${IMAGE_FILE} > ${NAME}_flash.svf
+        TARGET="${NAME}_flash.svf"
+    else
+        echo "illegal suffix [$EXT]"
+        exit 1
+    fi
+    
+    echo "TARGET: ${TARGET}"
+    
+    sudo openocd -f ${CONFIG} -c \
+    "   init;
+        scan_chain;
+        svf -tap ecp5.tap -quiet -progress ${TARGET};
+        exit;
+    "
+    
+    exit $?
+
+fi
+

test/sim/soc_cxxrtl/tb.cpp

@@ -341,9 +341,9 @@ int main(int argc, char **argv) {
       }
     }
 
-    // 12Mhz -> 9600 = 1250
+    // 25Mhz -> 9600 = 2604
     // SoftUartHandler must call in interrupt every 0.2*(1/BR)
-    if (uart_sample_count >= (1250 / 5)) {
+    if (uart_sample_count >= (2604 / 5)) {
       // if (top.p_uart__tx.get<bool>())
       //   printf("1");
       // else