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feat: SPI DMA

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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?
This commit is contained in:
Mira
2024-10-12 20:43:38 +06:00
parent 259d63197e
commit ec9dcc76f7
11 changed files with 362 additions and 229 deletions
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6
src/uart.c
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@@ -3,7 +3,7 @@
#include "ch32v003fun.h"
// Write multiple chars to UART
int _write(int fd, const char *buf, int size) {
int _write(__attribute__((unused)) int fd, const char *buf, int size) {
for (int i = 0; i < size; i++) {
while (!(USART2->STATR & USART_FLAG_TC)); // Wait for transmission complete
USART2->DATAR = *buf++; // Send character
@@ -18,8 +18,8 @@ int putchar(int c) {
return 1;
}
void setup_uart(int uart_brr) {
// RCC->APB2PCENR |= RCC_APB2Periph_GPIOA; // Enable GPIOA on APB2
void init_uart(int uart_brr) {
RCC->APB2PCENR |= RCC_APB2Periph_GPIOA; // Enable GPIOA on APB2
RCC->APB1PCENR |= RCC_APB1Periph_USART2; // Enable USART2 on APB1
GPIOA->CFGLR &= ~(0xf << (4 * 2)); // Clear bits for PA2