kuwoyuki
ec9dcc76f7
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?
37 lines
1.2 KiB
C
37 lines
1.2 KiB
C
#include "uart.h"
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#include "ch32v003fun.h"
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// Write multiple chars to UART
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int _write(__attribute__((unused)) int fd, const char *buf, int size) {
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for (int i = 0; i < size; i++) {
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while (!(USART2->STATR & USART_FLAG_TC)); // Wait for transmission complete
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USART2->DATAR = *buf++; // Send character
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}
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return size;
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}
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// Write a single char to UART
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int putchar(int c) {
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while (!(USART2->STATR & USART_FLAG_TC)); // Wait for transmission complete
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USART2->DATAR = (uint8_t)c; // Send character
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return 1;
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}
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void init_uart(int uart_brr) {
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RCC->APB2PCENR |= RCC_APB2Periph_GPIOA; // Enable GPIOA on APB2
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RCC->APB1PCENR |= RCC_APB1Periph_USART2; // Enable USART2 on APB1
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GPIOA->CFGLR &= ~(0xf << (4 * 2)); // Clear bits for PA2
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GPIOA->CFGLR |= (GPIO_Speed_10MHz | GPIO_CNF_OUT_PP_AF)
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<< (4 * 2); // Set PA2 as AF
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// USART configuration: 115200 baud rate, 8 data bits, no parity, 1 stop bit
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USART2->CTLR1 = USART_WordLength_8b | USART_Parity_No | USART_Mode_Tx;
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USART2->CTLR2 = USART_StopBits_1;
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USART2->CTLR3 = USART_HardwareFlowControl_None;
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USART2->BRR = uart_brr;
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// Enable USART2
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USART2->CTLR1 |= CTLR1_UE_Set;
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} |