/* -----------------------------------------------------
                        v003_uart.h

    Header fuer rudimentaere UART-Funktionen

    MCU   :  CH32V003
    Takt  :  48 MHz

    30.11.2025  R. Seelig
  ------------------------------------------------------ */
/*
                  CH32V003 A4M6                                        CH32V003F4P6
                  +-----------+                                      +--------------+
        PC1 / sda |1    C   16| PC0                         PD4 / a7 | 1         20 | PD3 / a4
        PC2 / scl |2    H   15| Vdd                   PD5 / a5 / utx | 2    C    19 | PD2 / a3
              PC3 |3    3   14| gnd                   PD6 / a6 / urx | 3    H    18 | PD1 / swio
              PC4 |4    2   13| PA2 / osc0 / a0           nrst / PD7 | 4    3    17 | PC7 / miso
       PC6 / mosi |5    V   12| PA1 / osc1 / a1      PA1 / osc0 / a0 | 5    2    16 | PC6 / mosi
       PC7 / miso |6    0   11| nrst / PD7           PA2 / osc1 / a1 | 6    V    15 | PC5 / sck / scl
       PD1 / swio |7    0   10| PD6 / a6 / urx                   gnd | 7    0    14 | PC4 / a2
         PD4 / a7 |8    3    9| PD5 / a5 / utx                   PD0 | 8    0    13 | PC3
                  +-----------+                                  Vdd | 9    3    12 | PC2 / scl
                                                                     +--------------+
*/

#ifndef in_v003uart
  #define in_v003uart

  #include <stdint.h>
  #include "Arduino.h"

  class V003uart
  {
   
    #define  FUNCONF_SYSTEM_CORE_CLOCK  48000000l
    #define  GPIO_CNF_OUT_PP_AF         8
    #define  GPIO_CNF_IN_PUPD           8
    #define  CTLR1_UE_Set               ((uint16_t)0x2000) // USART enable mask
  
    // --------------------------------------------------------------------
    //                      Prototypenbeschreibung
    // --------------------------------------------------------------------


    public:
      V003uart();

      void begin(uint32_t brate);
       
      void putchar(uint8_t ch);
      uint8_t getchar(void);
      uint8_t ischar(void);
      void prints(char *txbuf);
      void printint(int i, char komma);
      void readln(char *txbuffer, int maxlen);
      int readint(void);
      int readhex(void);
      void printhex(uint16_t h, char out16);
      
    protected:

    private:
      uint32_t baudrate;

      void locase(char *str);
      uint32_t ahtoi(char *str, char *error);
      void hexnibbleout(uint8_t b);

  };

#endif