Question
STM32N6 DCMI DMA initialization
Hello,
Because there is no active handle in DMA list for DCMI DMA initialization (bug!?) I searching for the ways to enable and use DMA, I can't find examples for parallel mode except for CSI serial, if I switch to use DCMIPP in parallel mode then the cubeMX do not generate msp initialization code function HAL_DCMIPP_MspInit for DCMIPP interface (no pinout, RCC, IRQ...), and in DMA list DCMI_PSSI handle stays inactive,
all my attempts to setup DCMI DMA do not work and DMA throws error 0x40, DCMI and camera working well, I getting hsync and vsync callbacks firing and counters show correct values, I tryed various settings but still cant start DMA transfer, there is my test and msp initialization code, please check:
uint32 err0 = HAL_DCMI_Start_DMA(&hdcmi, DCMI_MODE_CONTINUOUS, (uint32)frame_buff_DCMI, 320 * 240 / 2);
uint32 err1 = HAL_DCMI_GetError(&hdcmi);
HAL_Delay(5000);
uint32 err = HAL_DCMI_GetError(&hdcmi);
printf("DCMI %u %u, %u %u %u, %u %u\n", hdcmi.State, err, frNrCaptured, dcmiVsync, dcmiHsync, err0, err1);
HAL_DCMI_Stop(&hdcmi);
err = HAL_DCMI_GetError(&hdcmi);
printf("DCMI %u %u, %u %u %u\n", hdcmi.State, err, frNrCaptured, dcmiVsync, dcmiHsync);void HAL_DCMI_MspInit(DCMI_HandleTypeDef* hdcmi)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0};
if(hdcmi->Instance==DCMI)
{
/* USER CODE BEGIN DCMI_MspInit 0 */
/* USER CODE END DCMI_MspInit 0 */
/** Initializes the peripherals clock
*/
PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_DCMIPP;
if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
{
Error_Handler();
}
/* Peripheral clock enable */
__HAL_RCC_DCMI_PSSI_CLK_ENABLE();
__HAL_RCC_GPIOF_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOG_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
__HAL_RCC_GPION_CLK_ENABLE();
/**DCMI GPIO Configuration
PF1 ------> DCMI_D7
PA1 ------> DCMI_D0
PG3 ------> DCMI_HSYNC
PG15 ------> DCMI_D4
PA10 ------> DCMI_D1
PG1 ------> DCMI_PIXCLK
PG10 ------> DCMI_D2
PG2 ------> DCMI_D6
PB4(NJTRST) ------> DCMI_VSYNC
PN9 ------> DCMI_D5
PA4 ------> DCMI_D3
*/
GPIO_InitStruct.Pin = GPIO_PIN_1;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF9_DCMI;
HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_1|GPIO_PIN_10|GPIO_PIN_4;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF9_DCMI;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_3|GPIO_PIN_15|GPIO_PIN_1|GPIO_PIN_10
|GPIO_PIN_2;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF9_DCMI;
HAL_GPIO_Init(GPIOG, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_4;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF9_DCMI;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_9;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF10_DCMI;
HAL_GPIO_Init(GPION, &GPIO_InitStruct);
/* DCMI interrupt Init */
//HAL_NVIC_SetPriority(DCMI_PSSI_IRQn, 3, 0);
//HAL_NVIC_EnableIRQ(DCMI_PSSI_IRQn);
/* USER CODE BEGIN DCMI_MspInit 1 */
DMA_NodeConfTypeDef NodeConfig = {0};
NodeConfig.NodeType = DMA_GPDMA_LINEAR_NODE;
NodeConfig.Init.Request = GPDMA1_REQUEST_DCMI_PSSI;
NodeConfig.Init.BlkHWRequest = DMA_BREQ_SINGLE_BURST;
NodeConfig.Init.Direction = DMA_PERIPH_TO_MEMORY;
NodeConfig.Init.SrcInc = DMA_SINC_FIXED;
NodeConfig.Init.DestInc = DMA_DINC_INCREMENTED;
NodeConfig.Init.SrcDataWidth = DMA_SRC_DATAWIDTH_WORD;
NodeConfig.Init.DestDataWidth = DMA_DEST_DATAWIDTH_WORD;
NodeConfig.Init.SrcBurstLength = 1;
NodeConfig.Init.DestBurstLength = 4;
NodeConfig.Init.TransferAllocatedPort = DMA_SRC_ALLOCATED_PORT0 | DMA_DEST_ALLOCATED_PORT1;
NodeConfig.Init.TransferEventMode = DMA_TCEM_LAST_LL_ITEM_TRANSFER;
NodeConfig.Init.Mode = DMA_NORMAL;
NodeConfig.TriggerConfig.TriggerPolarity = DMA_TRIG_POLARITY_MASKED;
NodeConfig.DataHandlingConfig.DataExchange = DMA_EXCHANGE_NONE;
NodeConfig.DataHandlingConfig.DataAlignment = DMA_DATA_RIGHTALIGN_ZEROPADDED;
NodeConfig.SrcSecure = DMA_CHANNEL_SRC_SEC;
NodeConfig.DestSecure = DMA_CHANNEL_DEST_SEC;
NodeConfig.SrcAddress = (uint32_t)&DCMI->DR;
NodeConfig.DstAddress = (uint32_t)frame_buff_DCMI;
//NodeConfig.DataSize = 320 * 240 / 2; // in WORDs
NodeConfig.TriggerConfig.TriggerPolarity = DMA_TRIG_POLARITY_RISING;
if (HAL_DMAEx_List_BuildNode(&NodeConfig, &Node_GPDMA1_Channel6) != HAL_OK) {
Error_Handler();
}
if (HAL_DMAEx_List_InsertNode(&List_GPDMA1_Channel6, NULL, &Node_GPDMA1_Channel6) != HAL_OK) {
Error_Handler();
}
if (HAL_DMAEx_List_SetCircularMode(&List_GPDMA1_Channel6) != HAL_OK) {
Error_Handler();
}
handle_GPDMA1_Channel6.Instance = GPDMA1_Channel6;
handle_GPDMA1_Channel6.InitLinkedList.Priority = DMA_LOW_PRIORITY_MID_WEIGHT;
handle_GPDMA1_Channel6.InitLinkedList.LinkStepMode = DMA_LSM_FULL_EXECUTION;
handle_GPDMA1_Channel6.InitLinkedList.LinkAllocatedPort = DMA_LINK_ALLOCATED_PORT0;
handle_GPDMA1_Channel6.InitLinkedList.TransferEventMode = DMA_TCEM_LAST_LL_ITEM_TRANSFER;
handle_GPDMA1_Channel6.InitLinkedList.LinkedListMode = DMA_LINKEDLIST_CIRCULAR;
if (HAL_DMAEx_List_Init(&handle_GPDMA1_Channel6) != HAL_OK) {
Error_Handler();
}
if (HAL_DMAEx_List_LinkQ(&handle_GPDMA1_Channel6, &List_GPDMA1_Channel6) != HAL_OK) {
Error_Handler();
}
HAL_DMAEx_List_Start(&handle_GPDMA1_Channel6);
__HAL_LINKDMA(hdcmi, DMA_Handle, handle_GPDMA1_Channel6);
HAL_NVIC_SetPriority(DCMI_PSSI_IRQn, 3, 0);
HAL_NVIC_EnableIRQ(DCMI_PSSI_IRQn);
/* USER CODE END DCMI_MspInit 1 */
}
}
