Solved
Having a hardtime to get SPI1 working on STM32H753ZI
Hi everyone,
Hope all is well. I am trying to setup a basic SPI demo for the STM32H753ZI using the nucleo H753ZI just seeing if I can output my test word onto the MOSI line.
The conditions in my SPI demo is as follows:
- MCU clocked at 400MHz
- SPI is set as Full Duplex Master
- SPI Clocked at 400MHz/256 = 1.5625MHz approx
- PA4 = SS, PA5 = CLK, PA6 = MISO, PA7 = MOSI
- Theres no slave on the otherend just hooked up to the Salae logic Analyzer
The issues I am seeing is that My SPI demo and STs theres no data on the MOSI line additional to that the CLK is behaving super weird in my SPI demo. You can see boths STs and My SPI demo down below from the logic anayalzer
void initSPI() {
LL_AHB4_GRP1_EnableClock(LL_AHB4_GRP1_PERIPH_GPIOA);
LL_AHB4_GRP1_EnableClock(LL_AHB4_GRP1_PERIPH_GPIOB);
LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_SPI1);
LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_SPI2);
LL_GPIO_InitTypeDef LL_GPIO;
LL_SPI_InitTypeDef LL_SPI1;
LL_SPI_InitTypeDef LL_SPI2;
LL_GPIO_StructInit(&LL_GPIO);
LL_SPI_StructInit(&LL_SPI1);
LL_SPI_StructInit(&LL_SPI2);
// Setting up SPI 1 GPIO
LL_GPIO.Alternate = LL_GPIO_AF_5;
LL_GPIO.Mode = LL_GPIO_MODE_ALTERNATE;
LL_GPIO.OutputType = LL_GPIO_OUTPUT_PUSHPULL;
LL_GPIO.Pin = LL_GPIO_PIN_5 | LL_GPIO_PIN_6 | LL_GPIO_PIN_7;
LL_GPIO.Pull = LL_GPIO_PULL_NO;
LL_GPIO.Speed = LL_GPIO_SPEED_FREQ_VERY_HIGH;
LL_GPIO_Init(GPIOA, &LL_GPIO);
// Setting up SPI 1 GPIO
LL_GPIO.Alternate = 0x00;
LL_GPIO.Mode = LL_GPIO_MODE_OUTPUT;
LL_GPIO.OutputType = LL_GPIO_OUTPUT_PUSHPULL;
LL_GPIO.Pin = LL_GPIO_PIN_4;
LL_GPIO.Pull = LL_GPIO_PULL_UP;
LL_GPIO.Speed = LL_GPIO_SPEED_FREQ_VERY_HIGH;
LL_GPIO_Init(GPIOA, &LL_GPIO);
// Setting up SP1 1 Peri
LL_SPI1.BaudRate = LL_SPI_BAUDRATEPRESCALER_DIV256;
LL_SPI1.BitOrder = LL_SPI_MSB_FIRST;
LL_SPI1.CRCCalculation = LL_SPI_CRCCALCULATION_DISABLE;
LL_SPI1.CRCPoly = 0x00;
LL_SPI1.ClockPhase = LL_SPI_PHASE_2EDGE;
LL_SPI1.ClockPolarity = LL_SPI_POLARITY_LOW;
LL_SPI1.DataWidth = LL_SPI_DATAWIDTH_8BIT;
LL_SPI1.Mode = LL_SPI_MODE_MASTER;
LL_SPI1.NSS = LL_SPI_NSS_SOFT;
LL_SPI1.TransferDirection = LL_SPI_FULL_DUPLEX;
LL_SPI_Init(SPI1, &LL_SPI1);
LL_SPI_EnableGPIOControl(SPI1);
}int main(void)
{
char word = 'H';
HAL_Init();
SystemClock_Config();
initSPI();
LL_SPI_SetTransferSize(SPI1, 1);
GPIOA->BSRR |= (1 << 4); //Sets the SS line HIGH
LL_SPI_Enable(SPI1);
LL_SPI_StartMasterTransfer(SPI1);
GPIOA->BSRR |= (1 << 20); //Sets the SS line LOW
while(LL_SPI_IsActiveFlag_TXP(SPI1) == 0){};
SPI1->TXDR = (uint8_t)word;
while(LL_SPI_IsActiveFlag_EOT(SPI1) == 0){};
GPIOA->BSRR |= (1 << 4); //Sets the SS line HIGH
LL_SPI_Disable(SPI1);
while (1)
{
}
}My SPI Demo
STs SPI Demo
Any help would be appericiated, super stumped as to why its not behaving as it should.