Question
SerialPort with registers
Hello, I am trying to do one simple task with my STM32 board using just registers and interruptions in USART2.
Basically I have to wait until I receive data via serialPort, then activate interruption that should increment the value of my data by 1. After this it should send via serialPort the new data incremented by 1 and wait for the next time it receives data.
Here is the code I implemented:
void serialPrint(USART_TypeDef *dir, uint8_t* data, uint32_t tam) {
for (uint32_t i = 0; i < tam; i++) {
dir->DR = data[i];
while (!(dir->SR & USART_SR_TC));
}
}
void serialScan(USART_TypeDef *dir, uint8_t* data, uint32_t tam) {
for (uint32_t i = 0; i < tam; i++) {
while (!(dir->SR & USART_SR_RXNE));
data[i] = dir->DR;
}
}
void serialScanIT(USART_TypeDef *dir, uint8_t* buf, uint32_t size) {
uint32_t *NVIC_ISER1 = (uint32_t*)0xE000E104U;
*NVIC_ISER1 = 0x40;
}
void USART2_IRQHandler(void) {
if (USART2->SR & USART_SR_RXNE) {
dato[pos] = USART2->DR;
pos++;
if (pos >= size) {
callback(data);
deactivateIT();
}
}
}