1. EVM标准化的API扩展接口

1.1 数据结构

  • name: 注册接口名称
  • v: 注册接口API实现
  1. typedef struct evm_builtin_t{
  2.     const char * name;
  3.     evm_val_t v;
  4. }evm_builtin_t;

1.2 evm_module_create

注册 evm_builtin_t列表中所有的API注册到命名为name的模块中

  1. /**
  2.  * @brief 创建指定名称的模块
  3.  * @param e，虚拟机
  4.  * @param name，名称
  5.  * @param n，内置成员列表
  6.  * @return 内置对象
  7.  */
  8. evm_val_t evm_module_create(evm_t * e, const char* name, evm_builtin_t *n);

2. 扩展模块注册流程

  1. /**********定义用户API*****************/
  5. /**********创建模块*****************/
  6. int evm_module(evm_t * e){
  7.     evm_runtime = e;
  8.     number_of_callbacks = CONFIG_EVM_CALLBACK_SIZE;
  9.     callback_list = evm_list_create(e, GC_LIST, number_of_callbacks);
  10.     if( !callback_list ) return e->err;
  12.     for(uint32_t i = 0; i < number_of_callbacks; i++){
  13.         evm_list_set(e, callback_list, i, EVM_VAL_UNDEFINED);
  14.     }
  17.     args_list = evm_list_create(e, GC_LIST, number_of_callbacks);
  18.     if( !args_list ) return e->err;
  20.     evm_builtin_t module[] = {
  21.         {"delay_ms", evm_mk_native((intptr_t)evm_module_delay_ms)},
  22.         {"delay_us", evm_mk_native((intptr_t)evm_module_delay_us)},
  23. #ifdef CONFIG_EVM_GPIO
  24.         {"Pin", evm_class_pin(e)},
  25. #endif
  26. #ifdef CONFIG_EVM_LCD
  27.         {"LCD", evm_class_lcd(e)},
  28. #endif
  29. #ifdef CONFIG_EVM_LED
  30.         {"LED", evm_class_led(e)},
  31. #endif
  32. #ifdef CONFIG_EVM_FLASH
  33.         {"Flash", evm_class_flash(e)},
  34. #endif
  35. #ifdef CONFIG_EVM_ADC
  36.         {"ADC", evm_class_adc(e)},
  37. #endif
  38. #ifdef CONFIG_EVM_DAC
  39.         {"DAC", evm_class_dac(e)},
  40. #endif
  41. #ifdef CONFIG_EVM_RTC
  42.         {"RTC", evm_class_rtc(e)},
  43. #endif
  44. #ifdef CONFIG_EVM_SWITCH
  45.         {"Switch", evm_class_switch(e)},
  46. #endif
  47. #ifdef CONFIG_EVM_WATCHDOG
  48.         {"Watchdog", evm_class_watchdog(e)},
  49. #endif
  50. #ifdef CONFIG_EVM_TIMER
  51.         {"Timer", evm_class_timer(e)},
  52. #endif
  53. #ifdef CONFIG_EVM_UART
  54.         {"UART", evm_class_uart(e)},
  55. #endif
  56.         {NULL, NULL}
  57.     };
  58.     evm_module_create(e, "evm", module);
  59.     return e->err;
  60. }