rename G0:G070

.gitignore

@@ -13,3 +13,5 @@
 *.sublime-workspace 
 *.bk
 *-bak
+.qtcreator
+.clang-format

G0:G070,G0B1/g0b1/Makefile

@@ -0,0 +1,9 @@
+BINARY      := test
+# MCU code
+MCU         := G0B1xx
+# change this linking script depending on particular MCU model,
+LDSCRIPT    := stm32g0b1xb.ld
+
+include ../makefile.g0
+include ../../makefile.stm32
+

G0:G070,G0B1/g0b1/README

@@ -0,0 +1,3 @@
+Toggle LED on STM32G0B1-pill depending on user button:
+- pressed - 'SOS' in Morze
+- not pressed - blink with period of 1 second

G0:G070,G0B1/g0b1/main.c

@@ -0,0 +1,86 @@
+/*
+ * This file is part of the blink project.
+ * Copyright 2023 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "stm32g0.h"
+
+#define KEY_PORT        GPIOC
+#define KEY_PIN         (1<<13)
+#define LED_PORT        GPIOC
+#define LED_PIN         (1<<6)
+#define KEY_PRESSED()   (pin_read(KEY_PORT, KEY_PIN) == 1)
+#define LED_ON()        do{pin_set(LED_PORT, LED_PIN);}while(0)
+#define LED_OFF()       do{pin_clear(LED_PORT, LED_PIN);}while(0)
+
+// KEY (intpullup->0) - PC13
+// LED - PC6
+
+static volatile uint32_t blink_ctr = 0;
+
+/* Called when systick fires */
+void sys_tick_handler(void){
+    ++blink_ctr;
+}
+
+/*
+ * Set up timer to fire every x milliseconds
+ */
+static void systick_setup(uint32_t xms){ // xms < 2098!!!
+    blink_ctr = 0;
+    static uint32_t curms = 0;
+    if(curms == xms) return;
+    // 8MHz - HCLK/8
+    // this function also clears counter so it starts right away
+    SysTick_Config(8000 * xms); // arg should be < 0xffffff, so ms should be < 2098
+    curms = xms;
+}
+
+static void gpio_setup(void){
+    RCC->IOPENR = RCC_IOPENR_GPIOCEN; // enable PC
+    // set PC8 as opendrain output, PC0 is pullup input, other as default (AIN)
+    GPIOC->MODER = (0xffffffff & ~(GPIO_MODER_MODE6 | GPIO_MODER_MODE13)) | GPIO_MODER_MODER6_O; // GPIO_MODER_MODER13_I == 0
+    GPIOC->PUPDR = GPIO_PUPDR13_PD; // pull down
+}
+
+static const uint32_t L[] = {125,100,125,100,125,200, 350,100,350,100,350,200, 125,100,125,100,125, 1000};
+
+int main(void){
+    StartHSE();
+    gpio_setup();
+    systick_setup(500);
+    uint32_t M = 0;
+    int pressed = 0;
+    /* Do nothing in main loop */
+    while (1){
+        if(KEY_PRESSED()){ // key pressed - 'sos'
+            pressed = 1;
+            systick_setup(L[M]);
+            if(M & 1) LED_OFF();
+            else LED_ON();
+            if(++M == 18) M = 0;
+            while(blink_ctr == 0);
+        }else{ // key not pressed - blink with period of 1s
+            if(pressed){
+                M = 0;
+                pressed = 0;
+                systick_setup(500);
+            }
+            if(blink_ctr & 1) LED_ON();
+            else LED_OFF();
+        }
+    }
+}

G0:G070,G0B1/g0b1/openocd.cfg

@@ -0,0 +1,4 @@
+set FLASH_SIZE 0x20000
+
+source [find interface/stlink-v2-1.cfg]
+source [find target/stm32g0x.cfg]

G0:G070,G0B1/g0b1/test.config

@@ -0,0 +1,3 @@
+#define EBUG
+#define STM32G0
+#define STM32G0B1xx

G0:G070,G0B1/g0b1/test.creator.user

@@ -0,0 +1,214 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE QtCreatorProject>
+<!-- Written by QtCreator 18.0.2, 2026-03-01T23:07:02. -->
+<qtcreator>
+ <data>
+  <variable>EnvironmentId</variable>
+  <value type="QByteArray">{7bd84e39-ca37-46d3-be9d-99ebea85bc0d}</value>
+ </data>
+ <data>
+  <variable>ProjectExplorer.Project.ActiveTarget</variable>
+  <value type="qlonglong">0</value>
+ </data>
+ <data>
+  <variable>ProjectExplorer.Project.EditorSettings</variable>
+  <valuemap type="QVariantMap">
+   <value type="bool" key="EditorConfiguration.AutoDetect">true</value>
+   <value type="bool" key="EditorConfiguration.AutoIndent">true</value>
+   <value type="bool" key="EditorConfiguration.CamelCaseNavigation">true</value>
+   <valuemap type="QVariantMap" key="EditorConfiguration.CodeStyle.0">
+    <value type="QString" key="language">Cpp</value>
+    <valuemap type="QVariantMap" key="value">
+     <value type="QByteArray" key="CurrentPreferences">CppGlobal</value>
+    </valuemap>
+   </valuemap>
+   <valuemap type="QVariantMap" key="EditorConfiguration.CodeStyle.1">
+    <value type="QString" key="language">QmlJS</value>
+    <valuemap type="QVariantMap" key="value">
+     <value type="QByteArray" key="CurrentPreferences">QmlJSGlobal</value>
+    </valuemap>
+   </valuemap>
+   <value type="qlonglong" key="EditorConfiguration.CodeStyle.Count">2</value>
+   <value type="QByteArray" key="EditorConfiguration.Codec">KOI8-R</value>
+   <value type="bool" key="EditorConfiguration.ConstrainTooltips">false</value>
+   <value type="int" key="EditorConfiguration.IndentSize">4</value>
+   <value type="bool" key="EditorConfiguration.KeyboardTooltips">false</value>
+   <value type="int" key="EditorConfiguration.LineEndingBehavior">0</value>
+   <value type="int" key="EditorConfiguration.MarginColumn">80</value>
+   <value type="bool" key="EditorConfiguration.MouseHiding">true</value>
+   <value type="bool" key="EditorConfiguration.MouseNavigation">true</value>
+   <value type="int" key="EditorConfiguration.PaddingMode">1</value>
+   <value type="int" key="EditorConfiguration.PreferAfterWhitespaceComments">0</value>
+   <value type="bool" key="EditorConfiguration.PreferSingleLineComments">false</value>
+   <value type="bool" key="EditorConfiguration.ScrollWheelZooming">true</value>
+   <value type="bool" key="EditorConfiguration.ShowMargin">false</value>
+   <value type="int" key="EditorConfiguration.SmartBackspaceBehavior">0</value>
+   <value type="bool" key="EditorConfiguration.SmartSelectionChanging">true</value>
+   <value type="bool" key="EditorConfiguration.SpacesForTabs">true</value>
+   <value type="int" key="EditorConfiguration.TabKeyBehavior">0</value>
+   <value type="int" key="EditorConfiguration.TabSize">8</value>
+   <value type="bool" key="EditorConfiguration.UseGlobal">true</value>
+   <value type="bool" key="EditorConfiguration.UseIndenter">false</value>
+   <value type="int" key="EditorConfiguration.Utf8BomBehavior">1</value>
+   <value type="bool" key="EditorConfiguration.addFinalNewLine">true</value>
+   <value type="bool" key="EditorConfiguration.cleanIndentation">false</value>
+   <value type="bool" key="EditorConfiguration.cleanWhitespace">true</value>
+   <value type="QString" key="EditorConfiguration.ignoreFileTypes">*.md, *.MD, Makefile</value>
+   <value type="bool" key="EditorConfiguration.inEntireDocument">false</value>
+   <value type="bool" key="EditorConfiguration.skipTrailingWhitespace">true</value>
+   <value type="bool" key="EditorConfiguration.tintMarginArea">true</value>
+  </valuemap>
+ </data>
+ <data>
+  <variable>ProjectExplorer.Project.PluginSettings</variable>
+  <valuemap type="QVariantMap">
+   <valuemap type="QVariantMap" key="AutoTest.ActiveFrameworks">
+    <value type="bool" key="AutoTest.Framework.Boost">true</value>
+    <value type="bool" key="AutoTest.Framework.CTest">false</value>
+    <value type="bool" key="AutoTest.Framework.Catch">true</value>
+    <value type="bool" key="AutoTest.Framework.GTest">true</value>
+    <value type="bool" key="AutoTest.Framework.QtQuickTest">true</value>
+    <value type="bool" key="AutoTest.Framework.QtTest">true</value>
+   </valuemap>
+   <value type="bool" key="AutoTest.ApplyFilter">false</value>
+   <valuemap type="QVariantMap" key="AutoTest.CheckStates"/>
+   <valuelist type="QVariantList" key="AutoTest.PathFilters"/>
+   <value type="int" key="AutoTest.RunAfterBuild">0</value>
+   <value type="bool" key="AutoTest.UseGlobal">true</value>
+   <valuemap type="QVariantMap" key="ClangTools">
+    <value type="bool" key="ClangTools.AnalyzeOpenFiles">true</value>
+    <value type="bool" key="ClangTools.BuildBeforeAnalysis">true</value>
+    <value type="QString" key="ClangTools.DiagnosticConfig">Builtin.DefaultTidyAndClazy</value>
+    <value type="int" key="ClangTools.ParallelJobs">2</value>
+    <value type="bool" key="ClangTools.PreferConfigFile">false</value>
+    <valuelist type="QVariantList" key="ClangTools.SelectedDirs"/>
+    <valuelist type="QVariantList" key="ClangTools.SelectedFiles"/>
+    <valuelist type="QVariantList" key="ClangTools.SuppressedDiagnostics"/>
+    <value type="bool" key="ClangTools.UseGlobalSettings">true</value>
+   </valuemap>
+   <value type="int" key="RcSync">0</value>
+  </valuemap>
+ </data>
+ <data>
+  <variable>ProjectExplorer.Project.Target.0</variable>
+  <valuemap type="QVariantMap">
+   <value type="QString" key="DeviceType">Desktop</value>
+   <value type="bool" key="HasPerBcDcs">true</value>
+   <value type="QString" key="ProjectExplorer.ProjectConfiguration.DefaultDisplayName">Desktop</value>
+   <value type="QString" key="ProjectExplorer.ProjectConfiguration.DisplayName">Desktop</value>
+   <value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">{65a14f9e-e008-4c1b-89df-4eaa4774b6e3}</value>
+   <value type="qlonglong" key="ProjectExplorer.Target.ActiveBuildConfiguration">0</value>
+   <value type="qlonglong" key="ProjectExplorer.Target.ActiveDeployConfiguration">0</value>
+   <value type="qlonglong" key="ProjectExplorer.Target.ActiveRunConfiguration">0</value>
+   <valuemap type="QVariantMap" key="ProjectExplorer.Target.BuildConfiguration.0">
+    <value type="QString" key="ProjectExplorer.BuildConfiguration.BuildDirectory">/Big/Data/00__Electronics/STM32/G0-nolib/blink</value>
+    <valuemap type="QVariantMap" key="ProjectExplorer.BuildConfiguration.BuildStepList.0">
+     <valuemap type="QVariantMap" key="ProjectExplorer.BuildStepList.Step.0">
+      <valuelist type="QVariantList" key="GenericProjectManager.GenericMakeStep.BuildTargets">
+       <value type="QString">all</value>
+      </valuelist>
+      <value type="bool" key="ProjectExplorer.BuildStep.Enabled">true</value>
+      <value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">GenericProjectManager.GenericMakeStep</value>
+     </valuemap>
+     <value type="qlonglong" key="ProjectExplorer.BuildStepList.StepsCount">1</value>
+     <value type="QString" key="ProjectExplorer.ProjectConfiguration.DefaultDisplayName">Build</value>
+     <value type="QString" key="ProjectExplorer.ProjectConfiguration.DisplayName">Build</value>
+     <value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">ProjectExplorer.BuildSteps.Build</value>
+    </valuemap>
+    <valuemap type="QVariantMap" key="ProjectExplorer.BuildConfiguration.BuildStepList.1">
+     <valuemap type="QVariantMap" key="ProjectExplorer.BuildStepList.Step.0">
+      <valuelist type="QVariantList" key="GenericProjectManager.GenericMakeStep.BuildTargets">
+       <value type="QString">clean</value>
+      </valuelist>
+      <value type="bool" key="ProjectExplorer.BuildStep.Enabled">true</value>
+      <value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">GenericProjectManager.GenericMakeStep</value>
+     </valuemap>
+     <value type="qlonglong" key="ProjectExplorer.BuildStepList.StepsCount">1</value>
+     <value type="QString" key="ProjectExplorer.ProjectConfiguration.DefaultDisplayName">Clean</value>
+     <value type="QString" key="ProjectExplorer.ProjectConfiguration.DisplayName">Clean</value>
+     <value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">ProjectExplorer.BuildSteps.Clean</value>
+    </valuemap>
+    <value type="int" key="ProjectExplorer.BuildConfiguration.BuildStepListCount">2</value>
+    <value type="bool" key="ProjectExplorer.BuildConfiguration.ClearSystemEnvironment">false</value>
+    <valuelist type="QVariantList" key="ProjectExplorer.BuildConfiguration.CustomParsers"/>
+    <value type="bool" key="ProjectExplorer.BuildConfiguration.ParseStandardOutput">false</value>
+    <valuelist type="QVariantList" key="ProjectExplorer.BuildConfiguration.UserEnvironmentChanges"/>
+    <value type="QString" key="ProjectExplorer.ProjectConfiguration.DisplayName">По умолчанию</value>
+    <value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">GenericProjectManager.GenericBuildConfiguration</value>
+    <value type="qlonglong" key="ProjectExplorer.Target.ActiveDeployConfiguration">0</value>
+    <value type="qlonglong" key="ProjectExplorer.Target.ActiveRunConfiguration">0</value>
+    <valuemap type="QVariantMap" key="ProjectExplorer.Target.DeployConfiguration.0">
+     <valuemap type="QVariantMap" key="ProjectExplorer.BuildConfiguration.BuildStepList.0">
+      <value type="qlonglong" key="ProjectExplorer.BuildStepList.StepsCount">0</value>
+      <value type="QString" key="ProjectExplorer.ProjectConfiguration.DefaultDisplayName">Deploy</value>
+      <value type="QString" key="ProjectExplorer.ProjectConfiguration.DisplayName">Deploy</value>
+      <value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">ProjectExplorer.BuildSteps.Deploy</value>
+     </valuemap>
+     <value type="int" key="ProjectExplorer.BuildConfiguration.BuildStepListCount">1</value>
+     <valuemap type="QVariantMap" key="ProjectExplorer.DeployConfiguration.CustomData"/>
+     <value type="bool" key="ProjectExplorer.DeployConfiguration.CustomDataEnabled">false</value>
+     <value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">ProjectExplorer.DefaultDeployConfiguration</value>
+    </valuemap>
+    <value type="qlonglong" key="ProjectExplorer.Target.DeployConfigurationCount">1</value>
+    <valuemap type="QVariantMap" key="ProjectExplorer.Target.RunConfiguration.0">
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+     <value type="bool" key="Analyzer.QmlProfiler.Settings.UseGlobalSettings">true</value>
+     <value type="bool" key="Analyzer.Valgrind.Settings.UseGlobalSettings">true</value>
+     <valuelist type="QVariantList" key="CustomOutputParsers"/>
+     <value type="int" key="PE.EnvironmentAspect.Base">2</value>
+     <valuelist type="QVariantList" key="PE.EnvironmentAspect.Changes"/>
+     <value type="bool" key="PE.EnvironmentAspect.PrintOnRun">false</value>
+     <value type="QString" key="PerfRecordArgsId">-e cpu-cycles --call-graph dwarf,4096 -F 250</value>
+     <value type="QString" key="ProjectExplorer.ProjectConfiguration.DisplayName"></value>
+     <value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">ProjectExplorer.CustomExecutableRunConfiguration</value>
+     <value type="QString" key="ProjectExplorer.RunConfiguration.BuildKey"></value>
+     <value type="bool" key="ProjectExplorer.RunConfiguration.Customized">false</value>
+     <value type="QString" key="ProjectExplorer.RunConfiguration.UniqueId"></value>
+     <value type="bool" key="RunConfiguration.UseCppDebuggerAuto">true</value>
+     <value type="bool" key="RunConfiguration.UseQmlDebuggerAuto">true</value>
+    </valuemap>
+    <value type="qlonglong" key="ProjectExplorer.Target.RunConfigurationCount">1</value>
+   </valuemap>
+   <value type="qlonglong" key="ProjectExplorer.Target.BuildConfigurationCount">1</value>
+   <valuemap type="QVariantMap" key="ProjectExplorer.Target.DeployConfiguration.0">
+    <valuemap type="QVariantMap" key="ProjectExplorer.BuildConfiguration.BuildStepList.0">
+     <value type="qlonglong" key="ProjectExplorer.BuildStepList.StepsCount">0</value>
+     <value type="QString" key="ProjectExplorer.ProjectConfiguration.DefaultDisplayName">Deploy</value>
+     <value type="QString" key="ProjectExplorer.ProjectConfiguration.DisplayName">Deploy</value>
+     <value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">ProjectExplorer.BuildSteps.Deploy</value>
+    </valuemap>
+    <value type="int" key="ProjectExplorer.BuildConfiguration.BuildStepListCount">1</value>
+    <valuemap type="QVariantMap" key="ProjectExplorer.DeployConfiguration.CustomData"/>
+    <value type="bool" key="ProjectExplorer.DeployConfiguration.CustomDataEnabled">false</value>
+    <value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">ProjectExplorer.DefaultDeployConfiguration</value>
+   </valuemap>
+   <value type="qlonglong" key="ProjectExplorer.Target.DeployConfigurationCount">1</value>
+   <valuemap type="QVariantMap" key="ProjectExplorer.Target.RunConfiguration.0">
+    <value type="bool" key="Analyzer.Perf.Settings.UseGlobalSettings">true</value>
+    <value type="bool" key="Analyzer.QmlProfiler.Settings.UseGlobalSettings">true</value>
+    <value type="bool" key="Analyzer.Valgrind.Settings.UseGlobalSettings">true</value>
+    <valuelist type="QVariantList" key="CustomOutputParsers"/>
+    <value type="int" key="PE.EnvironmentAspect.Base">2</value>
+    <valuelist type="QVariantList" key="PE.EnvironmentAspect.Changes"/>
+    <value type="bool" key="PE.EnvironmentAspect.PrintOnRun">false</value>
+    <value type="QString" key="PerfRecordArgsId">-e cpu-cycles --call-graph dwarf,4096 -F 250</value>
+    <value type="QString" key="ProjectExplorer.ProjectConfiguration.DisplayName"></value>
+    <value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">ProjectExplorer.CustomExecutableRunConfiguration</value>
+    <value type="QString" key="ProjectExplorer.RunConfiguration.BuildKey"></value>
+    <value type="bool" key="ProjectExplorer.RunConfiguration.Customized">false</value>
+    <value type="QString" key="ProjectExplorer.RunConfiguration.UniqueId"></value>
+    <value type="bool" key="RunConfiguration.UseCppDebuggerAuto">true</value>
+    <value type="bool" key="RunConfiguration.UseQmlDebuggerAuto">true</value>
+   </valuemap>
+   <value type="qlonglong" key="ProjectExplorer.Target.RunConfigurationCount">1</value>
+  </valuemap>
+ </data>
+ <data>
+  <variable>ProjectExplorer.Project.TargetCount</variable>
+  <value type="qlonglong">1</value>
+ </data>
+ <data>
+  <variable>Version</variable>
+  <value type="int">22</value>
+ </data>
+</qtcreator>

G0:G070,G0B1/g0b1/test.files

@@ -0,0 +1,2 @@
+main.c
+systick_blink.c

G0:G070,G0B1/inc/Fx/stm32g0.h

@@ -19,8 +19,6 @@
  * MA 02110-1301, USA.
  */
 #pragma once
-#ifndef __STM32F0_H__
-#define __STM32F0_H__
 
 #include "vector.h"
 #include "stm32g0xx.h"
@@ -37,14 +35,14 @@
  * R=2..8, Q=2..8, P=2..32; N=8..86, M=1..8
  * fvco = 64..344MHz (after /M should be 2.66..16 -> for 8MHz HSE M=1..3!!!)
  * For 8MHZ:
- * fvco = (8/M)*N -> N(144)=18, M(144)=1
- * fpllp = fvco/P (<=122MHz) -> P(72)=2
- * fpllq = fvco/Q (<=128MHz) -> Q(48)=3
- * fpllr = fvco/R (<=64MHz)  -> R(48)=3
- * AHB prescaler (36MHz) = 72/36 = 2
- * APB prescaler (36MHz) = 36/36 = 1
+ * fvco = (8/M)*N -> N(128)=16, M(128)=1
+ * fpllp = fvco/P (<=122MHz) -> P(64)=2
+ * fpllq = fvco/Q (<=128MHz) -> Q(64)=2
+ * fpllr = fvco/R (<=64MHz)  -> R(64)=2
+ * AHB prescaler (64MHz) = 1
+ * APB prescaler (64MHz) = 1
  *
- * fp=fq=fr=fsys=64MHz => M=1, N=8, P=1, Q=1, R=1
+ * fp=fq=fr=fsys=64MHz => M=1, N=16, P=2, Q=2, R=2
 */
 #ifndef PLLN
 #define PLLN    16
@@ -61,6 +59,12 @@
 #ifndef PLLR
 #define PLLR    2
 #endif
+#ifndef PPRE
+#define PPRE    1
+#endif
+#ifndef HPRE
+#define HPRE    1
+#endif
 
 #define WAITWHILE(x)  do{register uint32_t StartUpCounter = 0; while((x) && (++StartUpCounter < 0xffffff)){nop();}}while(0)
 TRUE_INLINE void StartHSEHSI(int isHSE){
@@ -76,18 +80,19 @@ TRUE_INLINE void StartHSEHSI(int isHSE){
     WAITWHILE(PWR->SR2 & PWR_SR2_VOSF);
     if(isHSE){
         RCC->PLLCFGR = ((PLLR-1)<<29) | ((PLLQ-1)<<25) | ((PLLP-1)<<17) | (PLLN<<8) | ((PLLM-1)<<4)
-                | RCC_PLLCFGR_PLLREN | RCC_PLLCFGR_PLLPEN /* | RCC_PLLCFGR_PLLQEN */
+                | RCC_PLLCFGR_PLLREN | RCC_PLLCFGR_PLLQEN /* | RCC_PLLCFGR_PLLPEN */
                 | RCC_PLLCFGR_PLLSRC_HSE;
     }else{ // 64MHz from HSI16
         RCC->PLLCFGR = (8<<8) | (1<<4)
-                // enable P and/or Q if need
-                | RCC_PLLCFGR_PLLREN  /* | RCC_PLLCFGR_PLLPEN  | RCC_PLLCFGR_PLLQEN */
+                // enable P if need
+                | RCC_PLLCFGR_PLLREN  | RCC_PLLCFGR_PLLQEN /* | RCC_PLLCFGR_PLLPEN */
                 | RCC_PLLCFGR_PLLSRC_HSI;
     }
     RCC->CR |= RCC_CR_PLLON;
     WAITWHILE(!(RCC->CR & RCC_CR_PLLRDY));
-    FLASH->ACR |= FLASH_ACR_PRFTEN | FLASH_ACR_ICEN | FLASH_ACR_LATENCY_1;
-    RCC->CFGR = RCC_CFGR_SW_1; // set sysclk switch to pll
+    FLASH->ACR |= FLASH_ACR_PRFTEN | FLASH_ACR_ICEN | FLASH_ACR_LATENCY_2; // FLASH_ACR_LATENCY_2 for 64MHz
+    // set sysclk switch to pll, setup AHB/APB
+    RCC->CFGR = RCC_CFGR_SW_1 | PPRE << 12 | HPRE << 8;
 }
 
 #define StartHSE()  do{StartHSEHSI(1);}while(0)
@@ -253,7 +258,3 @@ TRUE_INLINE void StartHSEHSI(int isHSE){
 
 //#define  do{}while(0)
 
-
-
-
-#endif // __STM32F0_H__