Solved
[SOLVED] [STM32H503] SPI1 does not send anything
Good day, everyone.
I'm trying to launch SPI1 under Arduino IDE. The transmission didn't work and I switched to direct control of the registers. The code used is below:
#include <Arduino.h>
#include <SPI.h>
void setup()
{
SPI.begin();
Serial1.begin(115200);
}
void loop()
{
Serial1.print("loop begin: ");
Serial1.println(millis());
SPI1->CR1 &= ~SPI_CR1_SPE;
SPI1->CR2 = 0;
SPI1->CR1 |= SPI_CR1_SPE;
SPI1->CR1 |= SPI_CR1_CSTART;
while((SPI1->SR & SPI_SR_TXP) != 0)
{
*((__IO uint8_t *)&SPI1->TXDR) = 0xFF;
Serial1.println("SPI.write");
}
Serial1.print("SPI1->CR1: "); Serial1.println(SPI1->CR1, HEX);
Serial1.print("SPI1->CR2: "); Serial1.println(SPI1->CR2, HEX);
Serial1.print("SPI1->CFG1: "); Serial1.println(SPI1->CFG1, HEX);
Serial1.print("SPI1->CFG2: "); Serial1.println(SPI1->CFG2, HEX);
Serial1.print("SPI1->IER: "); Serial1.println(SPI1->IER, HEX);
Serial1.print("RCC->AHB1RSTR: "); Serial1.println(RCC->AHB1RSTR, HEX);
Serial1.print("RCC->AHB2RSTR: "); Serial1.println(RCC->AHB2RSTR, HEX);
Serial1.print("RCC->APB1LRSTR: "); Serial1.println(RCC->APB1LRSTR, HEX);
Serial1.print("RCC->APB1HRSTR: "); Serial1.println(RCC->APB1HRSTR, HEX);
Serial1.print("RCC->APB2RSTR: "); Serial1.println(RCC->APB2RSTR, HEX);
Serial1.print("RCC->APB3RSTR: "); Serial1.println(RCC->APB3RSTR, HEX);
Serial1.print("RCC->AHB1ENR: "); Serial1.println(RCC->AHB1ENR, HEX);
Serial1.print("RCC->AHB2ENR: "); Serial1.println(RCC->AHB2ENR, HEX);
Serial1.print("RCC->APB1LENR: "); Serial1.println(RCC->APB1LENR, HEX);
Serial1.print("RCC->APB1HENR: "); Serial1.println(RCC->APB1HENR, HEX);
Serial1.print("RCC->APB2ENR: "); Serial1.println(RCC->APB2ENR, HEX);
Serial1.print("RCC->APB3ENR: "); Serial1.println(RCC->APB3ENR, HEX);
Serial1.print("GPIOA->MODER: "); Serial1.println(GPIOA->MODER, HEX);
Serial1.print("GPIOA->AFRL: "); Serial1.println(GPIOA->AFR[0], HEX);
Serial1.print("GPIOA->AFRH: "); Serial1.println(GPIOA->AFR[1], HEX);
Serial1.print("GPIOB->MODER: "); Serial1.println(GPIOB->MODER, HEX);
Serial1.print("GPIOB->AFRL: "); Serial1.println(GPIOB->AFR[0], HEX);
Serial1.print("GPIOB->AFRH: "); Serial1.println(GPIOB->AFR[1], HEX);
Serial1.print("GPIOC->MODER: "); Serial1.println(GPIOC->MODER, HEX);
Serial1.print("GPIOC->AFRL: "); Serial1.println(GPIOC->AFR[0], HEX);
Serial1.print("GPIOC->AFRH: "); Serial1.println(GPIOC->AFR[1], HEX);
while((SPI1->SR & SPI_SR_RXP) == 0)
{
Serial1.print("SPI1->SR: "); Serial1.println(SPI1->SR, HEX);
delay(1000);
}
(void)*((__IO uint8_t *)&SPI1->RXDR);
//SPI.transfer(0xAA);
Serial1.print("loop end: ");
Serial1.println(millis());
}
What I see: the pins are set up, the peripheral module is set up, I fill the FIFO completely, but nothing is sent.
Debug output:
loop begin: 0
SPI.write
SPI.write
SPI.write
SPI.write
SPI.write
SPI.write
SPI.write
SPI.write
SPI.write
SPI.write
SPI.write
SPI.write
SPI.write
SPI.write
SPI.write
SPI.write
SPI1->CR1: 1201
SPI1->CR2: 0
SPI1->CFG1: 50070007
SPI1->CFG2: 84400000
SPI1->IER: 0
RCC->AHB1RSTR: 0
RCC->AHB2RSTR: 0
RCC->APB1LRSTR: 0
RCC->APB1HRSTR: 0
RCC->APB2RSTR: 0
RCC->APB3RSTR: 0
RCC->AHB1ENR: 90001100
RCC->AHB2ENR: 40000001
RCC->APB1LENR: 0
RCC->APB1HENR: 0
RCC->APB2ENR: 5000
RCC->APB3ENR: 0
GPIOA->MODER: ABFFABEB
GPIOA->AFRL: 55500880
GPIOA->AFRH: 0
GPIOB->MODER: FF33FEBF
GPIOB->AFRL: FF33FEBF
GPIOB->AFRH: FF33FEBF
GPIOC->MODER: FFFFFFFF
GPIOC->AFRL: FFFFFFFF
GPIOC->AFRH: FFFFFFFF
SPI1->SR: 0
SPI1->SR: 0
SPI1->SR: 0
SPI1->SR: 0
SPI1->SR: 0
SPI1->SR: 0
I can't figure out where the mistake is. I'd appreciate any hints.