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/* ... */
#include "main.h"
/* ... */
/* ... */
Includes
#define MASTER_BOARD
Private macro
__IO uint8_t ubButtonPress = 0;
uint8_t aTxBuffer[] = "**** SPI_TwoBoards_FullDuplex_DMA communication **** SPI_TwoBoards_FullDuplex_DMA communication **** SPI_TwoBoards_FullDuplex_DMA communication ****";
uint8_t ubNbDataToTransmit = sizeof(aTxBuffer);
__IO uint8_t ubTransmissionComplete = 0;
uint8_t aRxBuffer[sizeof(aTxBuffer)];
uint8_t ubNbDataToReceive = sizeof(aTxBuffer);
__IO uint8_t ubReceptionComplete = 0;
Private variables
void SystemClock_Config(void);
void Configure_DMA(void);
void Configure_SPI(void);
void Activate_SPI(void);
void LED_Init(void);
void LED_On(void);
void LED_Blinking(uint32_t Period);
#ifdef MASTER_BOARD
void LED_Off(void);
void UserButton_Init(void);
void WaitForUserButtonPress(void);/* ... */
#endif
void WaitAndCheckEndOfTransfer(void);
uint8_t Buffercmp8(uint8_t* pBuffer1, uint8_t* pBuffer2, uint8_t BufferLength);Private function prototypes
/* ... */
int main(void)
{
SystemClock_Config();
LED_Init();
Configure_SPI();
Configure_DMA();
#ifdef MASTER_BOARD
UserButton_Init();
WaitForUserButtonPress();/* ... */
#endif
Activate_SPI();
WaitAndCheckEndOfTransfer();
while (1)
{
}while (1) { ... }
}{ ... }
/* ... */
void Configure_DMA(void)
{
/* ... */
LL_AHB1_GRP1_EnableClock(LL_AHB1_GRP1_PERIPH_DMA2);
NVIC_SetPriority(DMA2_Stream2_IRQn, 0);
NVIC_EnableIRQ(DMA2_Stream2_IRQn);
NVIC_SetPriority(DMA2_Stream3_IRQn, 0);
NVIC_EnableIRQ(DMA2_Stream3_IRQn);
LL_DMA_ConfigTransfer(DMA2,
LL_DMA_STREAM_2,
LL_DMA_DIRECTION_PERIPH_TO_MEMORY | LL_DMA_PRIORITY_HIGH | LL_DMA_MODE_NORMAL |
LL_DMA_PERIPH_NOINCREMENT | LL_DMA_MEMORY_INCREMENT |
LL_DMA_PDATAALIGN_BYTE | LL_DMA_MDATAALIGN_BYTE);
LL_DMA_ConfigAddresses(DMA2,
LL_DMA_STREAM_2,
LL_SPI_DMA_GetRegAddr(SPI1), (uint32_t)aRxBuffer,
LL_DMA_GetDataTransferDirection(DMA2, LL_DMA_STREAM_2));
LL_DMA_SetDataLength(DMA2, LL_DMA_STREAM_2, ubNbDataToReceive);
LL_DMA_SetChannelSelection(DMA2, LL_DMA_STREAM_2, LL_DMA_CHANNEL_3);
LL_DMA_ConfigTransfer(DMA2,
LL_DMA_STREAM_3,
LL_DMA_DIRECTION_MEMORY_TO_PERIPH | LL_DMA_PRIORITY_HIGH | LL_DMA_MODE_NORMAL |
LL_DMA_PERIPH_NOINCREMENT | LL_DMA_MEMORY_INCREMENT |
LL_DMA_PDATAALIGN_BYTE | LL_DMA_MDATAALIGN_BYTE);
LL_DMA_ConfigAddresses(DMA2, LL_DMA_STREAM_3, (uint32_t)aTxBuffer, LL_SPI_DMA_GetRegAddr(SPI1),
LL_DMA_GetDataTransferDirection(DMA2, LL_DMA_STREAM_3));
LL_DMA_SetDataLength(DMA2, LL_DMA_STREAM_3, ubNbDataToTransmit);
LL_DMA_SetChannelSelection(DMA2, LL_DMA_STREAM_3, LL_DMA_CHANNEL_3);
LL_DMA_EnableIT_TC(DMA2, LL_DMA_STREAM_2);
LL_DMA_EnableIT_TE(DMA2, LL_DMA_STREAM_2);
LL_DMA_EnableIT_TC(DMA2, LL_DMA_STREAM_3);
LL_DMA_EnableIT_TE(DMA2, LL_DMA_STREAM_3);
}{ ... }
/* ... */
void Configure_SPI(void)
{
LL_AHB1_GRP1_EnableClock(LL_AHB1_GRP1_PERIPH_GPIOB);
LL_GPIO_SetPinMode(GPIOB, LL_GPIO_PIN_3, LL_GPIO_MODE_ALTERNATE);
LL_GPIO_SetAFPin_0_7(GPIOB, LL_GPIO_PIN_3, LL_GPIO_AF_5);
LL_GPIO_SetPinSpeed(GPIOB, LL_GPIO_PIN_3, LL_GPIO_SPEED_FREQ_HIGH);
LL_GPIO_SetPinPull(GPIOB, LL_GPIO_PIN_3, LL_GPIO_PULL_DOWN);
LL_GPIO_SetPinMode(GPIOB, LL_GPIO_PIN_4, LL_GPIO_MODE_ALTERNATE);
LL_GPIO_SetAFPin_0_7(GPIOB, LL_GPIO_PIN_4, LL_GPIO_AF_5);
LL_GPIO_SetPinSpeed(GPIOB, LL_GPIO_PIN_4, LL_GPIO_SPEED_FREQ_HIGH);
LL_GPIO_SetPinPull(GPIOB, LL_GPIO_PIN_4, LL_GPIO_PULL_DOWN);
LL_GPIO_SetPinMode(GPIOB, LL_GPIO_PIN_5, LL_GPIO_MODE_ALTERNATE);
LL_GPIO_SetAFPin_0_7(GPIOB, LL_GPIO_PIN_5, LL_GPIO_AF_5);
LL_GPIO_SetPinSpeed(GPIOB, LL_GPIO_PIN_5, LL_GPIO_SPEED_FREQ_HIGH);
LL_GPIO_SetPinPull(GPIOB, LL_GPIO_PIN_5, LL_GPIO_PULL_DOWN);
LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_SPI1);
LL_SPI_SetBaudRatePrescaler(SPI1, LL_SPI_BAUDRATEPRESCALER_DIV256);
LL_SPI_SetTransferDirection(SPI1,LL_SPI_FULL_DUPLEX);
LL_SPI_SetClockPhase(SPI1, LL_SPI_PHASE_2EDGE);
LL_SPI_SetClockPolarity(SPI1, LL_SPI_POLARITY_HIGH);
LL_SPI_SetDataWidth(SPI1, LL_SPI_DATAWIDTH_8BIT);
LL_SPI_SetNSSMode(SPI1, LL_SPI_NSS_SOFT);
#ifdef MASTER_BOARD
LL_SPI_SetMode(SPI1, LL_SPI_MODE_MASTER);
#else
/* ... */
#endif
LL_SPI_EnableDMAReq_RX(SPI1);
LL_SPI_EnableDMAReq_TX(SPI1);
}{ ... }
/* ... */
void Activate_SPI(void)
{
LL_SPI_Enable(SPI1);
LL_DMA_EnableStream(DMA2, LL_DMA_STREAM_2);
LL_DMA_EnableStream(DMA2, LL_DMA_STREAM_3);
}{ ... }
/* ... */
void LED_Init(void)
{
LED2_GPIO_CLK_ENABLE();
LL_GPIO_SetPinMode(LED2_GPIO_PORT, LED2_PIN, LL_GPIO_MODE_OUTPUT);
}{ ... }
/* ... */
void LED_On(void)
{
LL_GPIO_SetOutputPin(LED2_GPIO_PORT, LED2_PIN);
}{ ... }
#ifdef MASTER_BOARD
/* ... */
void LED_Off(void)
{
LL_GPIO_ResetOutputPin(LED2_GPIO_PORT, LED2_PIN);
}{ ... }
#endif/* ... */
/* ... */
void LED_Blinking(uint32_t Period)
{
while (1)
{
LL_GPIO_TogglePin(LED2_GPIO_PORT, LED2_PIN);
LL_mDelay(Period);
}while (1) { ... }
}{ ... }
#ifdef MASTER_BOARD
/* ... */
void UserButton_Init(void)
{
USER_BUTTON_GPIO_CLK_ENABLE();
LL_GPIO_SetPinMode(USER_BUTTON_GPIO_PORT, USER_BUTTON_PIN, LL_GPIO_MODE_INPUT);
LL_GPIO_SetPinPull(USER_BUTTON_GPIO_PORT, USER_BUTTON_PIN, LL_GPIO_PULL_NO);
USER_BUTTON_SYSCFG_SET_EXTI();
USER_BUTTON_EXTI_LINE_ENABLE();
USER_BUTTON_EXTI_FALLING_TRIG_ENABLE();
NVIC_EnableIRQ(USER_BUTTON_EXTI_IRQn);
NVIC_SetPriority(USER_BUTTON_EXTI_IRQn, 0x03);
}{ ... }
/* ... */
void WaitForUserButtonPress(void)
{
while (ubButtonPress == 0)
{
LL_GPIO_TogglePin(LED2_GPIO_PORT, LED2_PIN);
LL_mDelay(LED_BLINK_FAST);
}while (ubButtonPress == 0) { ... }
LED_Off();
}{ ... }
#endif/* ... */
/* ... */
void WaitAndCheckEndOfTransfer(void)
{
while (ubTransmissionComplete != 1)
{
}while (ubTransmissionComplete != 1) { ... }
LL_DMA_DisableStream(DMA2, LL_DMA_STREAM_3);
while (ubReceptionComplete != 1)
{
}while (ubReceptionComplete != 1) { ... }
LL_DMA_DisableStream(DMA2, LL_DMA_STREAM_2);
if(Buffercmp8((uint8_t*)aTxBuffer, (uint8_t*)aRxBuffer, ubNbDataToTransmit))
{
LED_Blinking(LED_BLINK_ERROR);
}if (Buffercmp8((uint8_t*)aTxBuffer, (uint8_t*)aRxBuffer, ubNbDataToTransmit)) { ... }
else
{
LED_On();
}else { ... }
}{ ... }
/* ... */
uint8_t Buffercmp8(uint8_t* pBuffer1, uint8_t* pBuffer2, uint8_t BufferLength)
{
while (BufferLength--)
{
if (*pBuffer1 != *pBuffer2)
{
return 1;
}if (*pBuffer1 != *pBuffer2) { ... }
pBuffer1++;
pBuffer2++;
}while (BufferLength--) { ... }
return 0;
}{ ... }
/* ... */
void SystemClock_Config(void)
{
LL_RCC_HSE_EnableBypass();
LL_RCC_HSE_Enable();
while(LL_RCC_HSE_IsReady() != 1)
{
}while (LL_RCC_HSE_IsReady() != 1) { ... };
LL_FLASH_SetLatency(LL_FLASH_LATENCY_3);
LL_RCC_PLL_ConfigDomain_SYS(LL_RCC_PLLSOURCE_HSE, LL_RCC_PLLM_DIV_8, 400, LL_RCC_PLLP_DIV_4);
LL_RCC_PLL_Enable();
while(LL_RCC_PLL_IsReady() != 1)
{
}while (LL_RCC_PLL_IsReady() != 1) { ... };
LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);
LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_PLL);
while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_PLL)
{
}while (LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_PLL) { ... };
LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_2);
LL_RCC_SetAPB2Prescaler(LL_RCC_APB2_DIV_1);
SysTick_Config(100000000 / 1000);
SystemCoreClock = 100000000;
}{ ... }
/* ... */
void UserButton_Callback(void)
{
ubButtonPress = 1;
}{ ... }
/* ... */
void DMA2_ReceiveComplete_Callback(void)
{
ubReceptionComplete = 1;
}{ ... }
/* ... */
void DMA2_TransmitComplete_Callback(void)
{
ubTransmissionComplete = 1;
}{ ... }
/* ... */
void SPI1_TransferError_Callback(void)
{
LL_DMA_DisableStream(DMA2, LL_DMA_STREAM_2);
LL_DMA_DisableStream(DMA2, LL_DMA_STREAM_3);
LED_Blinking(LED_BLINK_ERROR);
}{ ... }
#ifdef USE_FULL_ASSERT
/* ... */
void assert_failed(uint8_t *file, uint32_t line)
{
/* ... */
while (1)
{
}while (1) { ... }
}assert_failed (uint8_t *file, uint32_t line) { ... }
/* ... */#endif
/* ... */
/* ... */