initial WIP

lots of code copied over, things filled in to hopefully get the LED matrix lighting up. untested.

firmware/app/system_ch32x035.h

@@ -0,0 +1,51 @@
+/********************************** (C) COPYRIGHT *******************************
+ * File Name          : system_ch32x035.h
+ * Author             : WCH
+ * Version            : V1.0.0
+ * Date               : 2023/04/06
+ * Description        : CH32X035 Device Peripheral Access Layer System Header File.
+*********************************************************************************
+* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
+* Attention: This software (modified or not) and binary are used for 
+* microcontroller manufactured by Nanjing Qinheng Microelectronics.
+*******************************************************************************/
+#ifndef __SYSTEM_CH32X035_H
+#define __SYSTEM_CH32X035_H
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+#define HCLK_48MHZ      RCC_HPRE_DIV1
+#define HCLK_24MHZ      RCC_HPRE_DIV2
+#define HCLK_16MHZ      RCC_HPRE_DIV3
+#define HCLK_12MHZ      RCC_HPRE_DIV4
+#define HCLK_9_6MHZ     RCC_HPRE_DIV5
+#define HCLK_8MHZ       RCC_HPRE_DIV6
+#define HCLK_6_8MHZ     RCC_HPRE_DIV7
+#define HCLK_6MHZ       RCC_HPRE_DIV8
+#define HCLK_3MHZ       RCC_HPRE_DIV16
+#define HCLK_1_5MHZ     RCC_HPRE_DIV32
+#define HCLK_750KHZ     RCC_HPRE_DIV64
+#define HCLK_375KHZ     RCC_HPRE_DIV128
+#define HCLK_187KHZ     RCC_HPRE_DIV256
+
+
+extern uint32_t SystemCoreClock;          /* System Clock Frequency (Core Clock) */
+
+/* System_Exported_Functions */  
+extern void SystemInit(void);
+extern void SystemCoreClockUpdate(void);
+
+void SetSysClock_HSI(uint32_t divider);
+
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+
+
+