【超低功耗STM32U5 IoT探索套件】 STM32U585AII6Q 和EMW3080WIFI模组通讯
<div class='showpostmsg'><p> STM32U5 IoT探索套件和EMW3080WIFI原理图：EMW3080是基于MX1290V2 SOC的单3.3V供电的、集成Wi-Fi和Cortex-M4F MCU的嵌入式Wi-Fi模块，支持浮点运算，Memory、外设接口资源丰富，能满足大部分应用需求和上云的要求。</p><p> EMW3080的19脚默认为BOOT功能引脚，烧写固件的时候会使用；PIN23为EasyLink时使用；PIN21/PIN22为调试信息输出UART，开发时一般不使用；PIN21上电时为高电平或悬空；11脚为CHIP_EN，做复位管脚使用，不用时要悬空；PIN9、PIN10为另一组UART，这组UART可以通过AT指令开发EMW3080B模组。</p>
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<p>关键配置和SPI初始化：</p>
<pre>
<code>static void MX_SPI2_Init(void)
{
/* USER CODE BEGIN SPI2_Init 0 */
/* USER CODE END SPI2_Init 0 */
SPI_AutonomousModeConfTypeDef HAL_SPI_AutonomousMode_Cfg_Struct = {0};
/* USER CODE BEGIN SPI2_Init 1 */
/* USER CODE END SPI2_Init 1 */
/* SPI2 parameter configuration*/
hspi2.Instance = SPI2;
hspi2.Init.Mode = SPI_MODE_MASTER;
hspi2.Init.Direction = SPI_DIRECTION_2LINES;
hspi2.Init.DataSize = SPI_DATASIZE_8BIT;
hspi2.Init.CLKPolarity = SPI_POLARITY_LOW;
hspi2.Init.CLKPhase = SPI_PHASE_1EDGE;
hspi2.Init.NSS = SPI_NSS_SOFT;
hspi2.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_8;
hspi2.Init.FirstBit = SPI_FIRSTBIT_MSB;
hspi2.Init.TIMode = SPI_TIMODE_DISABLE;
hspi2.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
hspi2.Init.CRCPolynomial = 0x7;
hspi2.Init.NSSPMode = SPI_NSS_PULSE_DISABLE;
hspi2.Init.NSSPolarity = SPI_NSS_POLARITY_LOW;
hspi2.Init.FifoThreshold = SPI_FIFO_THRESHOLD_01DATA;
hspi2.Init.TxCRCInitializationPattern = SPI_CRC_INITIALIZATION_ALL_ZERO_PATTERN;
hspi2.Init.RxCRCInitializationPattern = SPI_CRC_INITIALIZATION_ALL_ZERO_PATTERN;
hspi2.Init.MasterSSIdleness = SPI_MASTER_SS_IDLENESS_00CYCLE;
hspi2.Init.MasterInterDataIdleness = SPI_MASTER_INTERDATA_IDLENESS_00CYCLE;
hspi2.Init.MasterReceiverAutoSusp = SPI_MASTER_RX_AUTOSUSP_DISABLE;
hspi2.Init.MasterKeepIOState = SPI_MASTER_KEEP_IO_STATE_DISABLE;
hspi2.Init.IOSwap = SPI_IO_SWAP_DISABLE;
hspi2.Init.ReadyMasterManagement = SPI_RDY_MASTER_MANAGEMENT_INTERNALLY;
hspi2.Init.ReadyPolarity = SPI_RDY_POLARITY_HIGH;
if (HAL_SPI_Init(&hspi2) != HAL_OK)
{
Error_Handler();
}
HAL_SPI_AutonomousMode_Cfg_Struct.TriggerState = SPI_AUTO_MODE_DISABLE;
HAL_SPI_AutonomousMode_Cfg_Struct.TriggerSelection = SPI_GRP1_GPDMA_CH0_TCF_TRG;
HAL_SPI_AutonomousMode_Cfg_Struct.TriggerPolarity = SPI_TRIG_POLARITY_RISING;
if (HAL_SPIEx_SetConfigAutonomousMode(&hspi2, &HAL_SPI_AutonomousMode_Cfg_Struct) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN SPI2_Init 2 */
SPI2->CFG1 |= 0x00000007 << SPI_CFG1_CRCSIZE_Pos;
/* USER CODE END SPI2_Init 2 */
}</code></pre>
<pre>
<code>static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOG_CLK_ENABLE();
__HAL_RCC_GPIOD_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
__HAL_RCC_GPIOF_CLK_ENABLE();
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(MXCHIP_NSS_GPIO_Port, MXCHIP_NSS_Pin, GPIO_PIN_SET);
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(MXCHIP_RESET_GPIO_Port, MXCHIP_RESET_Pin, GPIO_PIN_RESET);
/*Configure GPIO pin : MXCHIP_FLOW_Pin */
GPIO_InitStruct.Pin = MXCHIP_FLOW_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(MXCHIP_FLOW_GPIO_Port, &GPIO_InitStruct);
/*Configure GPIO pin : MXCHIP_NOTIFY_Pin */
GPIO_InitStruct.Pin = MXCHIP_NOTIFY_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(MXCHIP_NOTIFY_GPIO_Port, &GPIO_InitStruct);
/*Configure GPIO pin : MXCHIP_NSS_Pin */
GPIO_InitStruct.Pin = MXCHIP_NSS_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(MXCHIP_NSS_GPIO_Port, &GPIO_InitStruct);
/*Configure GPIO pin : MXCHIP_RESET_Pin */
GPIO_InitStruct.Pin = MXCHIP_RESET_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(MXCHIP_RESET_GPIO_Port, &GPIO_InitStruct);
/* EXTI interrupt init*/
HAL_NVIC_SetPriority(EXTI14_IRQn, 5, 0);
HAL_NVIC_EnableIRQ(EXTI14_IRQn);
HAL_NVIC_SetPriority(EXTI15_IRQn, 5, 0);
HAL_NVIC_EnableIRQ(EXTI15_IRQn);
}</code></pre>
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