Created
April 12, 2024 03:13
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const size_t usart1_buff_size = 256; | |
char usart1_buff[usart1_buff_size]; | |
uint16_t usart1_buff_write = 0; | |
uint16_t usart1_buff_read = 0; | |
#ifdef __cplusplus | |
extern "C" { | |
#endif | |
void USART1_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast"))); | |
void USART1_IRQHandler(void) { | |
USART_ClearITPendingBit(USART1, USART_IT_RXNE); | |
usart1_buff[usart1_buff_write] = USART_ReceiveData(USART1); | |
usart1_buff_write++; | |
usart1_buff_write %= usart1_buff_size; | |
} | |
#ifdef __cplusplus | |
} | |
#endif | |
int usart1_available() { | |
return (usart1_buff_write != usart1_buff_read); | |
} | |
char usart1_get() { | |
uint8_t c; | |
if (usart1_buff_write != usart1_buff_read) { | |
c = usart1_buff[usart1_buff_read]; | |
usart1_buff_read++; | |
usart1_buff_read %= usart1_buff_size; | |
return c; | |
} | |
return 0; | |
} | |
void setup() { | |
Serial.begin(115200); | |
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); | |
NVIC_SetPriority(USART1_IRQn, UART_IRQ_PRIO); | |
NVIC_EnableIRQ(USART1_IRQn); | |
} | |
void loop() { | |
while (usart1_available()) { | |
Serial.print(usart1_get()); | |
} | |
delay(1000); | |
} |
Impressive! That's quite a bit of work you've taken upon yourself.
I'm currently using the WCH Arduino core for my CH32V003 projects. Using the Arduino API allows me to reuse many libraries.
After getting features such as working I2C and Serial working, I now often run into the limited flash space, partly caused by HAL overhead. Your core promises a smaller footprint. Good to see potential alternatives coming up...
For the WCH core I've contributed features such as I2C slave and Eeprom emulation. Your code helped me with interrupt driven Serial RX. Thank you! (I'll probably submit my PR for those changes sometime soon.)
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https://github.com/ch32-riscv-ug/arduino_core_ch32_riscv_arduino
I am making a new Arduino Core.
It is not yet complete.
One of its features is that the EVT works as is.