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fix: usart rx demo doesn't work

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This commit is contained in:
IOsetting 2023-06-03 17:33:39 +08:00
parent 4c9de4301e
commit e1a0e1c556
3 changed files with 45 additions and 27 deletions
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66
Examples/LL/USART/UART_RX_Interrupt/main.c
View File

@ -2,29 +2,65 @@
* Demo: RX Interrupts
*/
#include "main.h"
#include "py32f0xx_bsp_clock.h"
#define BUF_SIZE 128
extern const char HEX_TABLE[16];
uint8_t pBuf[BUF_SIZE], ch;
__IO uint8_t printFlag = 0, pos = 0;
static void APP_SystemClockConfig(void);
void APP_USART_Config(uint32_t baudRate);
void APP_USART_IRQCallback(USART_TypeDef *USARTx);
/**
* Overwrite __io_getchar and __io_putchar to avoid conflicts.
* Both functions are already defined in py32f0xx_bsp_printf.c but use UART1 instead.
*/
int __io_getchar(void)
{
return (0);
}
int __io_putchar(int ch)
{
return (0);
}
/**
* Send one char to UART port
*/
void APP_UART_TxChar(char ch)
{
LL_USART_TransmitData8(USART2, ch);
while (!LL_USART_IsActiveFlag_TC(USART2));
LL_USART_ClearFlag_TC(USART2);
}
/**
* Send one string (a serial of chars end with '\0') to UART port
*/
void APP_UART_TxString(char *str)
{
while (*str) APP_UART_TxChar(*str++);
}
int main(void)
{
APP_SystemClockConfig();
// Set system clock to 48MHz
BSP_RCC_HSI_PLL48MConfig();
APP_USART_Config(115200);
printf("PY32F0 UART Interrupt RX Demo\r\nClock: %ld\r\n", SystemCoreClock);
APP_UART_TxString("PY32F0 UART Interrupt RX Demo\r\n");
while (1)
{
if (printFlag == 1)
{
LL_GPIO_TogglePin(GPIOB, LL_GPIO_PIN_5);
printf("%s\r\n", pBuf);
APP_UART_TxString((char *)pBuf);
APP_UART_TxString("\r\n");
printFlag = 0;
pos = 0;
}
@ -55,12 +91,12 @@ void APP_USART_Config(uint32_t baudRate)
LL_USART_ClearFlag_TC(USART2);
LL_IOP_GRP1_EnableClock(LL_IOP_GRP1_PERIPH_GPIOA);
// PA2 ------> USART1_TX
// PA2 ------> USART2_TX
LL_GPIO_SetPinMode(GPIOA, LL_GPIO_PIN_2, LL_GPIO_MODE_ALTERNATE);
LL_GPIO_SetPinSpeed(GPIOA, LL_GPIO_PIN_2, LL_GPIO_SPEED_FREQ_VERY_HIGH);
LL_GPIO_SetPinPull(GPIOA, LL_GPIO_PIN_2, LL_GPIO_PULL_UP);
LL_GPIO_SetAFPin_0_7(GPIOA, LL_GPIO_PIN_2, LL_GPIO_AF_4);
// PA3 ------> USART1_RX
// PA3 ------> USART2_RX
LL_GPIO_SetPinMode(GPIOA, LL_GPIO_PIN_3, LL_GPIO_MODE_ALTERNATE);
LL_GPIO_SetPinSpeed(GPIOA, LL_GPIO_PIN_3, LL_GPIO_SPEED_FREQ_VERY_HIGH);
LL_GPIO_SetPinPull(GPIOA, LL_GPIO_PIN_3, LL_GPIO_PULL_UP);
@ -76,11 +112,6 @@ void APP_USART_Config(uint32_t baudRate)
NVIC_SetPriority(USART2_IRQn, 1);
NVIC_EnableIRQ(USART2_IRQn);
#if defined (__GNUC__) && !defined (__clang__)
// To avoid io buffer
setvbuf(stdout, NULL, _IONBF, 0);
setvbuf(stdin, NULL, _IONBF, 0);
#endif
}
void APP_USART_IRQCallback(USART_TypeDef *USARTx)
@ -133,19 +164,6 @@ void APP_USART_IRQCallback(USART_TypeDef *USARTx)
}
}
static void APP_SystemClockConfig(void)
{
LL_RCC_HSI_Enable();
while(LL_RCC_HSI_IsReady() != 1);
LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);
LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_HSISYS);
while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_HSISYS);
LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_1);
LL_Init1msTick(8000000);
LL_SetSystemCoreClock(8000000);
}
void APP_ErrorHandler(void)
{

2
Examples/LL/USART/UART_RX_Interrupt/main.h
View File

@ -30,7 +30,7 @@ extern "C" {
#endif
/* Includes ------------------------------------------------------------------*/
#include <stdio.h>
#include "py32f0xx_ll_rcc.h"
#include "py32f0xx_ll_bus.h"
#include "py32f0xx_ll_system.h"

4
Libraries/BSP_LL/Src/py32f0xx_bsp_printf.c
View File

@ -88,8 +88,8 @@ void BSP_USART_Config(uint32_t baudRate)
#if defined (__GNUC__) && !defined (__clang__)
#define GETCHAR_PROTOTYPE int __io_getchar (void)
#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#define GETCHAR_PROTOTYPE __attribute__((weak)) int __io_getchar (void)
#define PUTCHAR_PROTOTYPE __attribute__((weak)) int __io_putchar(int ch)
#else
#define GETCHAR_PROTOTYPE int fgetc(FILE * f)
#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)