refactor: added peripherals and cpu feature folders

1 files changed, 0 insertions, 134 deletions

diff --git a/src/usart.ts b/src/usart.ts
deleted file mode 100644
index 6838736..0000000
--- a/src/usart.ts
+++ /dev/null
@@ -1,134 +0,0 @@
-import { CPU } from './cpu';
-import { avrInterrupt } from './interrupt';
-import { u8 } from './types';
-
-export interface USARTConfig {
-  rxCompleteInterrupt: u8;
-  dataRegisterEmptyInterrupt: u8;
-  txCompleteInterrupt: u8;
-
-  UCSRA: u8;
-  UCSRB: u8;
-  UCSRC: u8;
-  UBRRL: u8;
-  UBRRH: u8;
-  UDR: u8;
-}
-
-export const usart0Config: USARTConfig = {
-  rxCompleteInterrupt: 0x24,
-  dataRegisterEmptyInterrupt: 0x26,
-  txCompleteInterrupt: 0x28,
-  UCSRA: 0xc0,
-  UCSRB: 0xc1,
-  UCSRC: 0xc2,
-  UBRRL: 0xc4,
-  UBRRH: 0xc5,
-  UDR: 0xc6
-};
-
-export type USARTTransmitCallback = (value: u8) => void;
-export type USARTLineTransmitCallback = (value: string) => void;
-
-/* eslint-disable @typescript-eslint/no-unused-vars */
-// Register bits:
-const UCSRA_RXC = 0x80; // USART Receive Complete
-const UCSRA_TXC = 0x40; // USART Transmit Complete
-const UCSRA_UDRE = 0x20; // USART Data Register Empty
-const UCSRA_FE = 0x10; // Frame Error
-const UCSRA_DOR = 0x8; // Data OverRun
-const UCSRA_UPE = 0x4; // USART Parity Error
-const UCSRA_U2X = 0x2; // Double the USART Transmission Speed
-const UCSRA_MPCM = 0x1; // Multi-processor Communication Mode
-const UCSRB_RXCIE = 0x80; // RX Complete Interrupt Enable
-const UCSRB_TXCIE = 0x40; // TX Complete Interrupt Enable
-const UCSRB_UDRIE = 0x20; // USART Data Register Empty Interrupt Enable
-const UCSRB_RXEN = 0x10; // Receiver Enable
-const UCSRB_TXEN = 0x8; // Transmitter Enable
-const UCSRB_UCSZ2 = 0x4; // Character Size 2
-const UCSRB_RXB8 = 0x2; // Receive Data Bit 8
-const UCSRB_TXB8 = 0x1; // Transmit Data Bit 8
-const UCSRC_UMSEL1 = 0x80; // USART Mode Select 1
-const UCSRC_UMSEL0 = 0x40; // USART Mode Select 0
-const UCSRC_UPM1 = 0x20; // Parity Mode 1
-const UCSRC_UPM0 = 0x10; // Parity Mode 0
-const UCSRC_USBS = 0x8; // Stop Bit Select
-const UCSRC_UCSZ1 = 0x4; // Character Size 1
-const UCSRC_UCSZ0 = 0x2; // Character Size 0
-const UCSRC_UCPOL = 0x1; // Clock Polarity
-/* eslint-enable @typescript-eslint/no-unused-vars */
-
-export class AVRUSART {
-  public onByteTransmit: USARTTransmitCallback | null = null;
-  public onLineTransmit: USARTLineTransmitCallback | null = null;
-
-  private lineBuffer = '';
-
-  constructor(private cpu: CPU, private config: USARTConfig, private freqMHz: number) {
-    this.cpu.writeHooks[config.UCSRA] = (value) => {
-      this.cpu.data[config.UCSRA] = value | UCSRA_UDRE | UCSRA_TXC;
-      return true;
-    };
-    this.cpu.writeHooks[config.UCSRB] = (value, oldValue) => {
-      if (value & UCSRB_TXEN && !(oldValue & UCSRB_TXEN)) {
-        // Enabling the transmission - mark UDR as empty
-        this.cpu.data[config.UCSRA] |= UCSRA_UDRE;
-      }
-    };
-    this.cpu.writeHooks[config.UDR] = (value) => {
-      if (this.onByteTransmit) {
-        this.onByteTransmit(value);
-      }
-      if (this.onLineTransmit) {
-        const ch = String.fromCharCode(value);
-        if (ch === '\n') {
-          this.onLineTransmit(this.lineBuffer);
-          this.lineBuffer = '';
-        } else {
-          this.lineBuffer += ch;
-        }
-      }
-      this.cpu.data[config.UCSRA] |= UCSRA_UDRE | UCSRA_TXC;
-    };
-  }
-
-  tick() {
-    if (this.cpu.interruptsEnabled) {
-      const ucsra = this.cpu.data[this.config.UCSRA];
-      const ucsrb = this.cpu.data[this.config.UCSRB];
-      if (ucsra & UCSRA_UDRE && ucsrb & UCSRB_UDRIE) {
-        avrInterrupt(this.cpu, this.config.dataRegisterEmptyInterrupt);
-        this.cpu.data[this.config.UCSRA] &= ~UCSRA_UDRE;
-      }
-      if (ucsrb & UCSRA_TXC && ucsrb & UCSRB_TXCIE) {
-        avrInterrupt(this.cpu, this.config.txCompleteInterrupt);
-        this.cpu.data[this.config.UCSRA] &= ~UCSRA_TXC;
-      }
-    }
-  }
-
-  get baudRate() {
-    const UBRR = (this.cpu.data[this.config.UBRRH] << 8) | this.cpu.data[this.config.UBRRL];
-    const multiplier = this.cpu.data[this.config.UCSRA] & UCSRA_U2X ? 8 : 16;
-    return Math.floor(this.freqMHz / (multiplier * (1 + UBRR)));
-  }
-
-  get bitsPerChar() {
-    const ucsz =
-      ((this.cpu.data[this.config.UCSRA] & (UCSRC_UCSZ1 | UCSRC_UCSZ0)) >> 1) |
-      (this.cpu.data[this.config.UCSRB] & UCSRB_UCSZ2);
-    switch (ucsz) {
-      case 0:
-        return 5;
-      case 1:
-        return 6;
-      case 2:
-        return 7;
-      case 3:
-        return 8;
-      default: // 4..6 are reserved
-      case 7:
-        return 9;
-    }
-  }
-}