85 lines
1.9 KiB
C
85 lines
1.9 KiB
C
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#include "mx_spi.h"
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#include "bsp_spi.h"
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#include "string.h"
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mx_spi_frame_struct mx_spi_frame = {0};
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static uint16_t CalChecksum(uint8_t * data, uint16_t len)
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{
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uint16_t sum = 0;
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for(int i = 0; i < len; ++i)
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{
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sum += data[i];
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}
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return sum;
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}
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uint8_t creat_mx_spi_frame(uint8_t device_id, uint8_t message_type, uint8_t error_flag, uint8_t *data, uint16_t data_len, mx_spi_frame_struct * mx_spi_out_frame)
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{
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if(data_len != sizeof(mx_spi_out_frame->data))
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{
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return 0;
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}
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else
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{
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mx_spi_out_frame->device_id = device_id;
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mx_spi_out_frame->message_type = message_type;
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mx_spi_out_frame->error_flag = error_flag;
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memcpy(mx_spi_out_frame->data,data,data_len);
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mx_spi_out_frame->check_sum = CalChecksum((uint8_t *)mx_spi_out_frame,sizeof(mx_spi_frame_struct)-1);
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return 1;
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}
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}
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void mx_spi_init(void)
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{
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spi1_init((uint8_t *)&mx_spi_frame, sizeof(mx_spi_frame));
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}
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void update_spi_data(uint8_t *sensor_data,uint16_t sensor_data_len)
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{
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static mx_spi_frame_struct mx_spi_frame_temp = {0};
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creat_mx_spi_frame(0x01,0x01,0x00,sensor_data,sensor_data_len,&mx_spi_frame_temp);
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if(spi_i2s_flag_get(SPI1,SPI_I2S_BF_FLAG) == RESET)
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{
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if(SPI_SLAVE_CS_READ() == SET)
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{
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memcpy((uint8_t *)&mx_spi_frame,(uint8_t *)&mx_spi_frame_temp,sizeof(mx_spi_frame_struct));
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}
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}
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}
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//ˢ<>±<EFBFBD>־
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void updata_spi_dma(void)
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{
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static uint8_t busy = 0;
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if(spi_i2s_flag_get(SPI1,SPI_I2S_BF_FLAG) == RESET && SPI_SLAVE_CS_READ() == SET)
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{
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if(busy)
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{
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//mx_spi_init();
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busy = 0;
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dma_channel_enable(DMA2_CHANNEL1, FALSE);
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spi_enable(SPI1, FALSE);
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spi_enable(SPI1, TRUE);
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dma_data_number_set(DMA2_CHANNEL1, sizeof(mx_spi_frame));
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dma_channel_enable(DMA2_CHANNEL1, TRUE);
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}
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}
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if(spi_i2s_flag_get(SPI1,SPI_I2S_BF_FLAG) == SET && SPI_SLAVE_CS_READ() == RESET)
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{
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busy = 1;
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}
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}
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