Communicating with QSPI nor-flash via OctoSPI (OSPI) [STM32H730VBT6]

Hello, I have a very basic setup of OSPI1 on STM32H730VBT and I am trying to read the 1st Status Register of the Winbond W25Q128JV.

Environment

• STM32CubeMX: 6.5.0
• STM32Cube_FW_H7_V1.10.0
• STM32CubeIDE Version: 1.9.0 Build: 12015_20220302_0855 (UTC)

Hardware

A custom board with STM32H730VBT and Winbond W25Q128JV connected via OSPI1.

Code

Generated OSPI init code

void MX_OCTOSPI1_Init(void)
{
 
 /* USER CODE BEGIN OCTOSPI1_Init 0 */
 
 /* USER CODE END OCTOSPI1_Init 0 */
 
 OSPIM_CfgTypeDef sOspiManagerCfg = {0};
 
 /* USER CODE BEGIN OCTOSPI1_Init 1 */
 
 /* USER CODE END OCTOSPI1_Init 1 */
 hospi1.Instance = OCTOSPI1;
 hospi1.Init.FifoThreshold = 1;
 hospi1.Init.DualQuad = HAL_OSPI_DUALQUAD_DISABLE;
 hospi1.Init.MemoryType = HAL_OSPI_MEMTYPE_MICRON;
 hospi1.Init.DeviceSize = 24;
 hospi1.Init.ChipSelectHighTime = 1;
 hospi1.Init.FreeRunningClock = HAL_OSPI_FREERUNCLK_DISABLE;
 hospi1.Init.ClockMode = HAL_OSPI_CLOCK_MODE_0;
 hospi1.Init.WrapSize = HAL_OSPI_WRAP_NOT_SUPPORTED;
 hospi1.Init.ClockPrescaler = 1; /* HCLK3 is already 65MHz */
 hospi1.Init.SampleShifting = HAL_OSPI_SAMPLE_SHIFTING_NONE;
 hospi1.Init.DelayHoldQuarterCycle = HAL_OSPI_DHQC_DISABLE;
 hospi1.Init.ChipSelectBoundary = 0;
 hospi1.Init.DelayBlockBypass = HAL_OSPI_DELAY_BLOCK_BYPASSED;
 hospi1.Init.MaxTran = 0;
 hospi1.Init.Refresh = 0;
 if (HAL_OSPI_Init(&hospi1) != HAL_OK)
 {
 Error_Handler();
 }
 sOspiManagerCfg.ClkPort = 1;
 sOspiManagerCfg.NCSPort = 1;
 sOspiManagerCfg.DQSPort = 0;
 sOspiManagerCfg.IOLowPort = HAL_OSPIM_IOPORT_1_LOW;
 sOspiManagerCfg.IOHighPort = HAL_OSPIM_IOPORT_NONE;
 sOspiManagerCfg.Req2AckTime = 1; /* required when full assert is enabled... */
 if (HAL_OSPIM_Config(&hospi1, &sOspiManagerCfg, HAL_OSPI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
 {
 Error_Handler();
 }
 /* USER CODE BEGIN OCTOSPI1_Init 2 */
 
 /* USER CODE END OCTOSPI1_Init 2 */
 
}
 
void HAL_OSPI_MspInit(OSPI_HandleTypeDef* ospiHandle)
{
 
 GPIO_InitTypeDef GPIO_InitStruct = {0};
 RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0};
 if(ospiHandle->Instance==OCTOSPI1)
 {
 /* USER CODE BEGIN OCTOSPI1_MspInit 0 */
 
 /* USER CODE END OCTOSPI1_MspInit 0 */
 
 /** Initializes the peripherals clock
 */
 PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_OSPI;
 PeriphClkInitStruct.OspiClockSelection = RCC_OSPICLKSOURCE_D1HCLK;
 if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
 {
 Error_Handler();
 }
 
 /* OCTOSPI1 clock enable */
 __HAL_RCC_OCTOSPIM_CLK_ENABLE();
 __HAL_RCC_OSPI1_CLK_ENABLE();
 
 __HAL_RCC_GPIOE_CLK_ENABLE();
 __HAL_RCC_GPIOB_CLK_ENABLE();
 __HAL_RCC_GPIOD_CLK_ENABLE();
 __HAL_RCC_GPIOC_CLK_ENABLE();
 /**OCTOSPI1 GPIO Configuration
 PE2 ------> OCTOSPIM_P1_IO2
 PB2 ------> OCTOSPIM_P1_CLK
 PD11 ------> OCTOSPIM_P1_IO0
 PD13 ------> OCTOSPIM_P1_IO3
 PC10 ------> OCTOSPIM_P1_IO1
 PB6 ------> OCTOSPIM_P1_NCS
 */
 GPIO_InitStruct.Pin = 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_OCTOSPIM_P1;
 HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);
 
 GPIO_InitStruct.Pin = 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_OCTOSPIM_P1;
 HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
 
 GPIO_InitStruct.Pin = GPIO_PIN_11|GPIO_PIN_13;
 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_OCTOSPIM_P1;
 HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
 
 GPIO_InitStruct.Pin = GPIO_PIN_10;
 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_OCTOSPIM_P1;
 HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
 
 GPIO_InitStruct.Pin = GPIO_PIN_6;
 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_OCTOSPIM_P1;
 HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
 
 /* USER CODE BEGIN OCTOSPI1_MspInit 1 */
 
 /* USER CODE END OCTOSPI1_MspInit 1 */
 }
}

PS: `sOspiManagerCfg` init is slightly modified to not produce an error when full assert is enabled but `Req2AckTime` is not set by the STM32CubeMX.

Status Register 1 (SR1) read code

uint8_t reg = 0U;
OSPI_RegularCmdTypeDef cmd = {
		.Instruction = 0x05,
		.InstructionMode = HAL_OSPI_INSTRUCTION_1_LINE,
		.DataMode = HAL_OSPI_DATA_1_LINE,
		.AddressMode = HAL_OSPI_ADDRESS_NONE,
		.NbData = 1U,
		.DummyCycles = 0U
};
 
hal_ret = HAL_OSPI_Command(&hospi1, &cmd, HAL_OSPI_TIMEOUT_DEFAULT_VALUE);
if (hal_ret != HAL_OK) {
	return hal_ret;
}
 
 
hal_ret = HAL_OSPI_Receive(&hospi1, &reg, HAL_OSPI_TIMEOUT_DEFAULT_VALUE);
if (hal_ret != HAL_OK) {
	return hal_ret;
}
 
return HAL_OK;

Current

• Missing CLK on PB2
• Not HAL errors
• The SR1 read as `0x00`

Expected

• PB2 CLK signal
• Non zero SR1

Everything works perfectly when using QSPI on STM32H750 (same board, same clock configuration output [doesn't exceed < Max 133MHz for O/QSPI]). However, when Octo-SPI (OSPI) is used, then nothing is being read. It looks like the CLK signal is not present.

Any ideas what can be tried out?