add proj

2026-05-23 18:02:41 +03:00
commit b85718ccf2
42 changed files with 9913 additions and 0 deletions
--- a/B-G474E-DPOW1_Keil/Core/Src/retarget.c
+++ b/B-G474E-DPOW1_Keil/Core/Src/retarget.c
@@ -0,0 +1,101 @@
+#include "retarget.h"
+
+#include <stdio.h>
+
+#include "app_config.h"
+#include "stm32g474xx.h"
+
+#if defined(__ARMCC_VERSION) && (__ARMCC_VERSION < 6000000)
+#pragma import(__use_no_semihosting)
+
+struct __FILE
+{
+    int handle;
+};
+#elif defined(__ARMCC_VERSION)
+__asm(".global __use_no_semihosting\n");
+#endif
+
+FILE __stdout;
+FILE __stdin;
+
+static void gpio_pc10_pc11_to_usart3(void)
+{
+    RCC->AHB2ENR |= RCC_AHB2ENR_GPIOCEN;
+    (void)RCC->AHB2ENR;
+
+    /* PC10 = USART3_TX, PC11 = USART3_RX, AF7: ST-LINK VCP on CN3. */
+    GPIOC->MODER &= ~((3UL << (10U * 2U)) | (3UL << (11U * 2U)));
+    GPIOC->MODER |=  ((2UL << (10U * 2U)) | (2UL << (11U * 2U)));
+
+    GPIOC->OTYPER &= ~((1UL << 10U) | (1UL << 11U));
+    GPIOC->OSPEEDR |= ((3UL << (10U * 2U)) | (3UL << (11U * 2U)));
+    GPIOC->PUPDR &= ~((3UL << (10U * 2U)) | (3UL << (11U * 2U)));
+
+    GPIOC->AFR[1] &= ~((0xFUL << ((10U - 8U) * 4U)) | (0xFUL << ((11U - 8U) * 4U)));
+    GPIOC->AFR[1] |=  ((7UL   << ((10U - 8U) * 4U)) | (7UL   << ((11U - 8U) * 4U)));
+}
+
+void Retarget_Init(uint32_t baudrate)
+{
+    gpio_pc10_pc11_to_usart3();
+
+    RCC->APB1ENR1 |= RCC_APB1ENR1_USART3EN;
+    (void)RCC->APB1ENR1;
+
+    USART3->CR1 = 0U;
+    USART3->CR2 = 0U;
+    USART3->CR3 = 0U;
+
+    /* APB1 is not prescaled; use the clock that really started. */
+    USART3->BRR = (SystemCoreClock + (baudrate / 2U)) / baudrate;
+    USART3->CR1 = USART_CR1_TE | USART_CR1_RE | USART_CR1_UE;
+}
+
+void Retarget_PutChar(char ch)
+{
+    while ((USART3->ISR & USART_ISR_TXE_TXFNF) == 0U)
+    {
+        __NOP();
+    }
+    USART3->TDR = (uint8_t)ch;
+}
+
+int fputc(int ch, FILE *f)
+{
+    (void)f;
+
+    if (ch == '\n')
+    {
+        Retarget_PutChar('\r');
+    }
+
+    Retarget_PutChar((char)ch);
+    return ch;
+}
+
+int fgetc(FILE *f)
+{
+    (void)f;
+
+    while ((USART3->ISR & USART_ISR_RXNE_RXFNE) == 0U)
+    {
+        __NOP();
+    }
+
+    return (int)(USART3->RDR & 0xFFU);
+}
+
+void _ttywrch(int ch)
+{
+    Retarget_PutChar((char)ch);
+}
+
+void _sys_exit(int return_code)
+{
+    (void)return_code;
+    while (1)
+    {
+        __NOP();
+    }
+}