eddy/stm32samples
1
0
Fork 0
mirror of https://github.com/eddyem/stm32samples.git synced 2026-02-28 03:44:30 +03:00
Code Issues Packages Projects Releases Wiki Activity

add spi, not tested yet

Browse Source
This commit is contained in:
Edward Emelianov
2024-03-07 19:40:21 +03:00
parent 4a6086a182
commit 8ea835d80f
17 changed files with 433 additions and 49 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
F3:F303/CANbus4BTA/usart.c
View File

@@ -16,8 +16,9 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "stm32f3.h"
#include <stm32f3.h>
#include "hardware.h"
#include "flash.h"
#include "usart.h"
#include <string.h>
@@ -64,11 +65,16 @@ void usart_send(const char *str){
usart_sendn(str, L);
}
// USART1: PA10(Rx, pullup), PA9(Tx); USART1 = AF7 @PA9/10;
void usart_setup(){
// clock
GPIOA->MODER = (GPIOA->MODER & ~(GPIO_MODER_MODER9 | GPIO_MODER_MODER10)) |
MODER_AF(9) | MODER_AF(10);
GPIOA->AFR[1] = (GPIOA->AFR[1] & ~(GPIO_AFRH_AFRH1 | GPIO_AFRH_AFRH2)) |
AFRf(7, 9) | AFRf(7, 10);
RCC->APB2ENR |= RCC_APB2ENR_USART1EN;
USART1->ICR = 0xffffffff; // clear all flags
USART1->BRR = SysFreq / 115200;
USART1->BRR = SysFreq / the_conf.usartspeed;
USART1->CR1 = USART_CR1_TE | USART_CR1_RE | USART_CR1_UE | USART_CR1_RXNEIE; // 1start,8data,nstop; enable Rx,Tx,USART
uint32_t tmout = 16000000;
while(!(USART1->ISR & USART_ISR_TC)){if(--tmout == 0) break;} // polling idle frame Transmission