feat: SPI DMA

Squashed commit of the following:

commit c3e1f696b4fbafb6dd30c6934e4c7c181562e055
Author: kuwoyuki <kuwoyuki@cock.li>
Date:   Sat Oct 12 20:43:12 2024 +0600

    chore: spi dma

commit d1e7df60be3e06ed85ce8639516e299085d3c72b
Author: kuwoyuki <kuwoyuki@cock.li>
Date:   Sat Oct 12 15:14:11 2024 +0600

    static dummies

commit 81682428b471f825e3350e37aa74c373b46d4fef
Author: kuwoyuki <kuwoyuki@cock.li>
Date:   Sat Oct 12 14:45:39 2024 +0600

    dma works?

commit 150c97a4b566712a502d8a2861a2dc0864324d61
Author: kuwoyuki <kuwoyuki@cock.li>
Date:   Sat Oct 12 02:07:39 2024 +0600

    dma?

include/gpio.h

@@ -0,0 +1,9 @@
+#ifndef GPIO_H
+#define GPIO_H
+
+#include <stdint.h>
+
+// Function prototype for initializing GPIO
+void init_gpio(void);
+
+#endif  // GPIO_H

include/spi_dma.h

@@ -0,0 +1,35 @@
+#ifndef SPI_DMA_H
+#define SPI_DMA_H
+
+#include "ch32v003fun.h"
+
+typedef enum {
+  IDLE,
+  TRANSMITTING,
+  RECEIVING,
+  TX_DONE,
+  RX_DONE
+} transfer_state_t;
+
+// SPI DMA initialization function
+void init_spidma(void);
+
+// SPI DMA buffer read
+void spidma_read_buffer(uint8_t *buf, uint16_t len);
+
+// SPI DMA buffer write
+void spidma_write_buffer(uint8_t *buf, uint16_t len);
+
+// SPI (non-DMA) byte read
+uint8_t spi_read_byte();
+
+// SPI (non-DMA) byte write
+void spi_write_byte(uint8_t byte);
+
+// activate CS
+void spi_select(void);
+
+// deactivate CS
+void spi_unselect(void);
+
+#endif  // SPI_DMA_H

include/uart.h

@@ -12,6 +12,6 @@
    (UART_BAUD_RATE))  // USART1
 
 // Function prototypes
-void setup_uart(int uart_brr);
+void init_uart(int uart_brr);
 
 #endif  // UART_H

include/w5500.h

@@ -4,21 +4,27 @@
 #include <stdint.h>
 
 // Sets the CS pin low
-void W5500_Select(void);
+void w5500_select(void);
 
 // Sets the CS pin high
-void W5500_Unselect(void);
+void w5500_unselect(void);
 
 // Reads a byte via SPI
-uint8_t W5500_ReadByte(void);
+uint8_t w5500_read_byte(void);
 
 // Writes a byte via SPI
-void W5500_WriteByte(uint8_t byte);
+void w5500_write_byte(uint8_t byte);
 
 // Reads multiple bytes via SPI
-void W5500_ReadBuff(uint8_t* buff, uint16_t len);
+void w5500_read_buffer(uint8_t* buff, uint16_t len);
 
 // Writes multiple bytes via SPI
-void W5500_WriteBuff(uint8_t* buff, uint16_t len);
+void w5500_write_buffer(uint8_t* buff, uint16_t len);
+
+// Initializes the W5500 chip
+void configure_network(void);
+
+// resolves a domain name
+void resolve_domain_name(const char* domain_name);
 
 #endif  // W5500_H