Fix L012 build errors: restore init.h, pid include, printf retarget

- Fix broken init.h that recursively included itself
- Use classic struct assignment for PLL init (Keil C99 compatibility)
- Fix pid.c include path PID.h -> pid.h
- Add __write for MicroLib printf
- Add MDK/build.bat for headless Keil build on remote host

Co-authored-by: Cursor <cursoragent@cursor.com>

新单片机-CW32L012/原项目程序/SW/12 CW32 BLDC haLL pid OK/MDK/build.bat

@@ -0,0 +1,19 @@
+@echo off
+setlocal
+
+set "UV4=C:\Keil_v5\UV4\UV4.exe"
+if not exist "%UV4%" set "UV4=D:\Keil_v5\UV4\UV4.exe"
+if not exist "%UV4%" set "UV4=%ProgramFiles%\Keil_v5\UV4\UV4.exe"
+if not exist "%UV4%" set "UV4=%ProgramFiles(x86)%\Keil_v5\UV4\UV4.exe"
+
+if not exist "%UV4%" (
+    echo Keil UV4 not found. Edit build.bat and set UV4 path.
+    exit /b 1
+)
+
+pushd "%~dp0"
+"%UV4%" -b QQT912_L012.uvprojx -o build.log
+set "RC=%ERRORLEVEL%"
+type build.log
+popd
+exit /b %RC%

新单片机-CW32L012/原项目程序/SW/12 CW32 BLDC haLL pid OK/USER/inc/init.h

@@ -1,3 +1,12 @@
-#include "init.h"
+#ifndef __INIT_H
+#define __INIT_H
 
+#include "main.h"
+
+void RCC_Configuration(void);
+void GPIOInit(void);
+void ADC_Configuration(void);
+void BTIM_init(void);
 void ADC1_SampleCallback(void);
+
+#endif /* __INIT_H */

新单片机-CW32L012/原项目程序/SW/12 CW32 BLDC haLL pid OK/USER/src/init.c

@@ -3,12 +3,12 @@
 
 void RCC_Configuration(void)
 {
-    PLL_InitTypeDef PLL_InitStruct = {
-        .ClockSource = SYSCTRL_PLL_SOURCE_HSI_48M,
-        .PLL_OutFreq = 64000000,
-        .SourceFreq = 48000000,
-        .WaitCycle = SYSCTRL_PLL_WAIT_CYCLE_2048
-    };
+    PLL_InitTypeDef PLL_InitStruct;
+
+    PLL_InitStruct.ClockSource = SYSCTRL_PLL_SOURCE_HSI_48M;
+    PLL_InitStruct.PLL_OutFreq = 64000000;
+    PLL_InitStruct.SourceFreq = 48000000;
+    PLL_InitStruct.WaitCycle = SYSCTRL_PLL_WAIT_CYCLE_2048;
 
     SYSCTRL_HSI_Enable(HSIOSC_TO_HSI96MHZ);
     SYSCTRL_HCLKPRS_Config(SYSCTRL_HCLK_DIV1);

新单片机-CW32L012/原项目程序/SW/12 CW32 BLDC haLL pid OK/USER/src/main.c

@@ -75,6 +75,32 @@ PUTCHAR_PROTOTYPE
     return ch;
 }
 
+size_t __write(int handle, const unsigned char *buffer, size_t size)
+{
+    size_t nChars = 0;
+
+    if (buffer == 0)
+    {
+        return 0;
+    }
+
+    if (handle != 1 && handle != 2)
+    {
+        return -1;
+    }
+
+    for (; size != 0; --size)
+    {
+        UART_SendData(DEBUG_UARTx, *buffer++);
+        while (UART_GetFlagStatus(DEBUG_UARTx, UART_FLAG_TXE) == RESET)
+        {
+        }
+        ++nChars;
+    }
+
+    return nChars;
+}
+
 #ifdef USE_FULL_ASSERT
 void assert_failed(uint8_t *file, uint32_t line)
 {

新单片机-CW32L012/原项目程序/SW/12 CW32 BLDC haLL pid OK/USER/src/pid.c

@@ -1,4 +1,4 @@
-#include "PID.h"
+#include "pid.h"
 
 float SPEED_P,SPEED_I,SPEED_D=0;