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

PEP emulation (didn't test yet)

Browse Source
This commit is contained in:
Edward Emelianov
2024-03-08 13:23:23 +03:00
parent 8ea835d80f
commit bc82142e87
17 changed files with 183 additions and 26 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
F3:F303/CANbus4BTA/usart.c
View File

@@ -24,7 +24,7 @@
static volatile int idatalen = 0; // received data line length (including '\n')
volatile int linerdy = 0, // received data ready
static volatile int linerdy = 0, // received data ready
dlen = 0, // length of data (including '\n') in current buffer
bufovr = 0; // input buffer overfull
@@ -65,9 +65,17 @@ void usart_send(const char *str){
usart_sendn(str, L);
}
// turn off USART1 and deinit GPIO
void usart_deinit(){
USART1->ICR = 0xffffffff;
USART1->CR1 = 0;
RCC->APB2ENR &= ~RCC_APB2ENR_USART1EN;
GPIOA->AFR[1] = GPIOA->AFR[1] & ~(GPIO_AFRH_AFRH1 | GPIO_AFRH_AFRH2);
GPIOA->MODER = GPIOA->MODER & ~(GPIO_MODER_MODER9 | GPIO_MODER_MODER10);
}
// 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)) |