Скачать или смотреть CMSIS UART Tx for ARM Cortex M

In this video I show how data can be sent from an ARM Cortex M microcontroller via UART using only the CMSIS Core library (no HAL).

Here is the code (Youtube does not allow angled brackets, I had to remove them):

#include"stm32f10x.h"
#include string.h

void TxString(char*);

int main(void)
{
char str1[] = "Hello World! ";
TxString(str1);

char str2[] = "Testing... 0,1,2,3... ";
TxString(str2);

strcpy(str1, "Replace the content of the original string. ");
TxString(str1);

}

void TxString(char* str)
{
uint32_t BaudRate = 115200;

RCC-APB2ENR |= RCC_APB2ENR_IOPAEN;
GPIOA-CRH |= (GPIO_CRH_CNF9_1 | GPIO_CRH_MODE9_1);
RCC-APB2ENR |= RCC_APB2ENR_USART1EN;
USART1-BRR = SystemCoreClock/BaudRate;
USART1-CR1 |= USART_CR1_TE;
USART1-CR1 |= USART_CR1_UE;

char *p = str;
int i = 0;

while(*p)
{
Repeat:
if(USART1-SR && USART_SR_TXE)
{
USART1-DR = str[i];
i++;
p++;
}
else goto Repeat;

}

}