113 lines
3.9 KiB
C
113 lines
3.9 KiB
C
#include "bsp_spi.h"
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static void gpio_config(void)
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{
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gpio_init_type gpio_initstructure;
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crm_periph_clock_enable(CRM_GPIOA_PERIPH_CLOCK, TRUE);
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gpio_default_para_init(&gpio_initstructure);
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/* spi3 sck pin */
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gpio_initstructure.gpio_out_type = GPIO_OUTPUT_PUSH_PULL;
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gpio_initstructure.gpio_drive_strength = GPIO_DRIVE_STRENGTH_STRONGER;
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gpio_initstructure.gpio_mode = GPIO_MODE_MUX;
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gpio_initstructure.gpio_pull = GPIO_PULL_DOWN;
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gpio_initstructure.gpio_pins = GPIO_PINS_4;
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gpio_init(GPIOA, &gpio_initstructure);
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gpio_pin_mux_config(GPIOA, GPIO_PINS_SOURCE4, GPIO_MUX_5);
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gpio_initstructure.gpio_pull = GPIO_PULL_DOWN;
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gpio_initstructure.gpio_pins = GPIO_PINS_5;
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gpio_init(GPIOA, &gpio_initstructure);
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gpio_pin_mux_config(GPIOA, GPIO_PINS_SOURCE5, GPIO_MUX_5);
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/* spi3 miso pin */
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gpio_initstructure.gpio_pull = GPIO_PULL_UP;
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gpio_initstructure.gpio_pins = GPIO_PINS_6;
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gpio_init(GPIOA, &gpio_initstructure);
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gpio_pin_mux_config(GPIOA, GPIO_PINS_SOURCE6, GPIO_MUX_5);
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/* spi3 mosi pin */
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gpio_initstructure.gpio_pull = GPIO_PULL_UP;
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gpio_initstructure.gpio_pins = GPIO_PINS_7;
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gpio_init(GPIOA, &gpio_initstructure);
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gpio_pin_mux_config(GPIOA, GPIO_PINS_SOURCE7, GPIO_MUX_5);
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}
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static void spi_config(void)
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{
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spi_init_type spi_init_struct;
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/* master spi initialization */
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crm_periph_clock_enable(CRM_SPI1_PERIPH_CLOCK, TRUE);
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spi_default_para_init(&spi_init_struct);
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/* dual line unidirectional full-duplex mode */
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spi_init_struct.transmission_mode = SPI_TRANSMIT_FULL_DUPLEX;
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spi_init_struct.master_slave_mode = SPI_MODE_SLAVE;
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spi_init_struct.mclk_freq_division = SPI_MCLK_DIV_64;
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spi_init_struct.first_bit_transmission = SPI_FIRST_BIT_MSB;
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spi_init_struct.frame_bit_num = SPI_FRAME_8BIT;
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spi_init_struct.clock_polarity = SPI_CLOCK_POLARITY_LOW;
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spi_init_struct.clock_phase = SPI_CLOCK_PHASE_1EDGE;
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spi_init_struct.cs_mode_selection = SPI_CS_HARDWARE_MODE;
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spi_init(SPI1, &spi_init_struct);
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spi_i2s_dma_transmitter_enable(SPI1,TRUE);
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spi_i2s_dma_receiver_enable(SPI1,TRUE);
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spi_enable(SPI1, TRUE);
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}
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static void dma_config(uint8_t *buffer, uint16_t buffer_size)
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{
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dma_init_type dma_init_struct;
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crm_periph_clock_enable(CRM_DMA2_PERIPH_CLOCK, TRUE);
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dmamux_enable(DMA2, TRUE);
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dma_reset(DMA2_CHANNEL1);
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dma_default_para_init(&dma_init_struct);
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dma_init_struct.buffer_size = buffer_size;
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dma_init_struct.memory_data_width = DMA_MEMORY_DATA_WIDTH_BYTE;
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dma_init_struct.memory_inc_enable = TRUE;
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dma_init_struct.peripheral_data_width = DMA_PERIPHERAL_DATA_WIDTH_BYTE;
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dma_init_struct.peripheral_inc_enable = FALSE;
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dma_init_struct.priority = DMA_PRIORITY_HIGH;
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dma_init_struct.loop_mode_enable = FALSE;
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dma_init_struct.memory_base_addr = (uint32_t)buffer;
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dma_init_struct.peripheral_base_addr = (uint32_t)&(SPI1->dt);
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dma_init_struct.direction = DMA_DIR_MEMORY_TO_PERIPHERAL;
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dma_init(DMA2_CHANNEL1, &dma_init_struct);
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dmamux_init(DMA2MUX_CHANNEL1, DMAMUX_DMAREQ_ID_SPI1_TX);
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dma_channel_enable(DMA2_CHANNEL1, TRUE);
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dma_reset(DMA2_CHANNEL1);
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dma_default_para_init(&dma_init_struct);
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dma_init_struct.buffer_size = buffer_size;
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dma_init_struct.memory_data_width = DMA_MEMORY_DATA_WIDTH_BYTE;
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dma_init_struct.memory_inc_enable = TRUE;
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dma_init_struct.peripheral_data_width = DMA_PERIPHERAL_DATA_WIDTH_BYTE;
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dma_init_struct.peripheral_inc_enable = FALSE;
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dma_init_struct.priority = DMA_PRIORITY_HIGH;
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dma_init_struct.loop_mode_enable = FALSE;
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dma_init_struct.memory_base_addr = (uint32_t)buffer;
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dma_init_struct.peripheral_base_addr = (uint32_t)&(SPI1->dt);
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dma_init_struct.direction = DMA_DIR_MEMORY_TO_PERIPHERAL;
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dma_init(DMA2_CHANNEL1, &dma_init_struct);
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dmamux_init(DMA2MUX_CHANNEL1, DMAMUX_DMAREQ_ID_SPI1_TX);
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dma_channel_enable(DMA2_CHANNEL1, TRUE);
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}
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void spi1_init(uint8_t *buffer, uint16_t buffer_size)
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{
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gpio_config();
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dma_config(buffer, buffer_size);
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spi_config();
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}
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