/* * Copyright (c) 2006-2024 RT-Thread Development Team * * SPDX-License-Identifier: Apache-2.0 * * Change Logs: * Date Author Notes * 2024-10-08 wumingzi first implementation * 2024-10-08 wumingzi add custom configuration and support muti spi obj */ #include #include #include #include "rtdef.h" #include "rttypes.h" #include "sdkconfig.h" #include "hal/spi_hal.h" /*bsp/ESP32_C3/packages/ESP-IDF-latest/components/hal/include/hal/spi_types.h*/ #include "driver/gpio.h" /*bsp/ESP32_C3/packages/ESP-IDF-latest/components/driver/include/driver/gpio.h*/ #include "driver/spi_master.h" #include "drv_spi.h" #include "drivers/dev_spi.h" #ifdef RT_USING_SPI #ifdef BSP_USING_SPI2 #define LOG_TAG "drv.spi" #include static struct rt_spi_bus spi_bus2; static spi_device_handle_t spi; static spi_bus_config_t buscfg; static struct esp32_spi spi_bus_obj[] = { #ifdef BSP_USING_SPI2 { .bus_name = "spi2", .spi_bus = &spi_bus2, .esp32_spi_bus_cfg = &buscfg, }, #endif /* BSP_USING_SPI2 */ }; /* private rt-thread spi ops function */ static rt_err_t spi_configure(struct rt_spi_device* device, struct rt_spi_configuration* configuration); static rt_ssize_t spixfer(struct rt_spi_device* device, struct rt_spi_message* message); static struct rt_spi_ops esp32_spi_ops = { .configure = spi_configure, .xfer = spixfer, }; /** * @brief SPI Initialization * @param esp32_spi: SPI BUS * @retval None */ static void esp32_spi_init(struct esp32_spi *esp32_spi) { spi_configure(NULL,NULL); } static rt_err_t spi_configure(struct rt_spi_device* device, struct rt_spi_configuration* configuration) { static spi_bus_config_t buscfg = { .miso_io_num=SPI2_IOMUX_PIN_NUM_MISO, /*MISO*/ .mosi_io_num=SPI2_IOMUX_PIN_NUM_MOSI, /*MOSI*/ .sclk_io_num=SPI2_IOMUX_PIN_NUM_CLK, /*CLK*/ .quadwp_io_num=-1, /*不使用*/ .quadhd_io_num=-1, /*不使用*/ .max_transfer_sz=4092 /*最大传送数据长度*/ }; esp_err_t err = spi_bus_initialize(SPI2_HOST, &buscfg, SPI_DMA_CH_AUTO); ESP_ERROR_CHECK(err); static spi_device_interface_config_t devcfg; if(configuration->data_width == 8) { size_t length; /*/< Total data length, in bits*/ size_t rxlength; /*/< Total data length received, should be not greater than ``length`` in full-duplex mode (0 defaults this to the value of ``length``)*/ } LOG_W("configuration->max_hz = %d \n",configuration->max_hz); if(configuration->max_hz >= SPI_MASTER_FREQ_80M) { devcfg.clock_speed_hz = SPI_MASTER_FREQ_80M; /*/< 80MHz*/ } else if(configuration->max_hz >= SPI_MASTER_FREQ_40M) { devcfg.clock_speed_hz = SPI_MASTER_FREQ_40M; /*/< 40MHz*/ } else if(configuration->max_hz >= SPI_MASTER_FREQ_26M) { devcfg.clock_speed_hz = SPI_MASTER_FREQ_26M; /*/< 26.67MHz*/ } else if(configuration->max_hz >= SPI_MASTER_FREQ_20M) { devcfg.clock_speed_hz = SPI_MASTER_FREQ_20M; /*/< 20MHz*/ } else if(configuration->max_hz >= SPI_MASTER_FREQ_16M) { devcfg.clock_speed_hz = SPI_MASTER_FREQ_16M; /*/< 16MHz*/ } else if(configuration->max_hz >= SPI_MASTER_FREQ_13M) { devcfg.clock_speed_hz = SPI_MASTER_FREQ_13M; /*/< 13.33MHz*/ } else if(configuration->max_hz >= SPI_MASTER_FREQ_11M) { devcfg.clock_speed_hz = SPI_MASTER_FREQ_11M; /*/< 11.43MHz*/ } else if(configuration->max_hz >= SPI_MASTER_FREQ_10M) { devcfg.clock_speed_hz = SPI_MASTER_FREQ_10M; /*/< 10MHz*/ } else if(configuration->max_hz >= SPI_MASTER_FREQ_9M) { devcfg.clock_speed_hz = SPI_MASTER_FREQ_9M ; /*/< 8.89MHz*/ } else { devcfg.clock_speed_hz = SPI_MASTER_FREQ_8M ; } switch (configuration->mode) { case RT_SPI_MODE_0: /*!< CPOL = 0, CPHA = 0 */ devcfg.mode = 0; case RT_SPI_MODE_1: /*!< CPOL = 0, CPHA = 1 */ devcfg.mode = 1; case RT_SPI_MODE_2: /*!< CPOL = 1, CPHA = 0 */ devcfg.mode = 2; case RT_SPI_MODE_3: /*!< CPOL = 1, CPHA = 1 */ devcfg.mode = 3; default: devcfg.mode = 0; } /* todo: support changing cs_pin,queue_size or specifing spi_device_interface_config_t and * spi_transaction_t by resever data.Meanwhile finish the initialization of interrupt * callback function and dma. */ devcfg.spics_io_num = RT_BSP_SPI_CS_PIN; devcfg.queue_size = 7; err = spi_bus_add_device(SPI2_HOST, &devcfg, &spi); ESP_ERROR_CHECK(err); /* Although there is only one spi bus object, it will be a template for other bsps of ESP32 series */ for(int i = 0; i < sizeof(spi_bus_obj)/sizeof(spi_bus_obj[0]); i++) { spi_bus_obj[i].bus_name = "spi2"; spi_bus_obj[i].spi_bus = &spi_bus2; spi_bus_obj[i].esp32_spi_bus_cfg = &buscfg; } return RT_EOK; }; static rt_ssize_t spixfer(struct rt_spi_device* device, struct rt_spi_message* message) { RT_ASSERT(device != NULL); RT_ASSERT(message != NULL); static spi_transaction_t trans; trans.tx_buffer = message->send_buf; trans.rx_buffer = message->recv_buf; trans.length = (message->length)*8; trans.rxlength = (message->length)*8; spi_device_acquire_bus(spi, portMAX_DELAY); esp_err_t err = spi_device_polling_transmit(spi, &trans); spi_device_release_bus(spi); ESP_ERROR_CHECK(err); return RT_EOK; }; /** * Attach the spi device to SPI bus, this function must be used after initialization. */ rt_err_t rt_hw_spi_device_attach(const char *bus_name, const char *device_name, rt_base_t cs_pin) { RT_ASSERT(bus_name != RT_NULL); RT_ASSERT(device_name != RT_NULL); rt_err_t result;rt_device_t busp = RT_NULL; struct rt_spi_device *spi_device; /* attach the device to spi bus*/ spi_device = (struct rt_spi_device *)rt_malloc(sizeof(struct rt_spi_device)); RT_ASSERT(spi_device != RT_NULL); result = rt_spi_bus_attach_device(spi_device, device_name, bus_name, (void *)cs_pin); if (result != RT_EOK) { LOG_E("%s attach to %s faild, %d\n", device_name, bus_name, result); } RT_ASSERT(result == RT_EOK); LOG_D("%s attach to %s done", device_name, bus_name); return result; } int rt_hw_spi_init(void) { int result = 0; for(int i = 0; i < sizeof(spi_bus_obj)/sizeof(spi_bus_obj[0]); i++) { spi_bus_obj[i].spi_bus->parent.user_data = (void *)&spi_bus_obj[i]; result = rt_spi_bus_register(spi_bus_obj[i].spi_bus, spi_bus_obj[i].bus_name, &esp32_spi_ops); RT_ASSERT(result == RT_EOK); LOG_D("%s bus init done", spi_bus_obj[i].bus_name); } return result; } INIT_BOARD_EXPORT(rt_hw_spi_init); #endif /* BSP_USING_SPI0 || BSP_USING_SPI1 || BSP_USING_SPI2 || BSP_USING_SPI3 || BSP_USING_SPI4*/ #endif /* RT_USING_SPI */