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@ -74,16 +74,16 @@ static void gpio_configuration(spi_user_data_t spi) {
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static void spi_configuration(spi_user_data_t spi) {
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SPI_InitTypeDef SPI_InitStructure;
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SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex; //SPI 设置为双线双向全双工
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SPI_InitStructure.SPI_Mode = SPI_Mode_Master; //设置为主 SPI
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SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; //SPI 发送接收 8 位帧结构
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SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low; //时钟悬空低
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SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge; //数据捕获于第一个时钟沿
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//TODO 以后可以尝试硬件 CS
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SPI_InitStructure.SPI_NSS = SPI_NSS_Soft; //内部 NSS 信号由 SSI 位控制
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SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2; //波特率预分频值为 2
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SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; //数据传输从 MSB 位开始
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SPI_InitStructure.SPI_CRCPolynomial = 7; // CRC 值计算的多项式
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SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex; //SPI 设置为双线双向全双工
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SPI_InitStructure.SPI_Mode = SPI_Mode_Master; //设置为主 SPI
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SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; //SPI 发送接收 8 位帧结构
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SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low; //时钟悬空低
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SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge; //数据捕获于第一个时钟沿
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//TODO 以后可以尝试硬件 CS
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SPI_InitStructure.SPI_NSS = SPI_NSS_Soft; //内部 NSS 信号由 SSI 位控制
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SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2; //波特率预分频值为 2
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SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; //数据传输从 MSB 位开始
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SPI_InitStructure.SPI_CRCPolynomial = 7; // CRC 值计算的多项式
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SPI_I2S_DeInit(spi->spix);
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SPI_Init(spi->spix, &SPI_InitStructure);
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@ -117,15 +117,15 @@ static sfud_err spi_write_read(const sfud_spi *spi, const uint8_t *write_buf, si
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}
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GPIO_ResetBits(spi_dev->cs_gpiox, spi_dev->cs_gpio_pin);
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/* 开始读写数据 */
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/* 开始读写数据 */
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for (size_t i = 0, retry_times; i < write_size + read_size; i++) {
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/* 先写缓冲区中的数据到 SPI 总线，数据写完后，再写 dummy(0xFF) 到 SPI 总线 */
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/* 先写缓冲区中的数据到 SPI 总线，数据写完后，再写 dummy(0xFF) 到 SPI 总线 */
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if (i < write_size) {
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send_data = *write_buf++;
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} else {
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send_data = SFUD_DUMMY_DATA;
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}
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/* 发送数据 */
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/* 发送数据 */
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retry_times = 1000;
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while (SPI_I2S_GetFlagStatus(spi_dev->spix, SPI_I2S_FLAG_TXE) == RESET) {
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SFUD_RETRY_PROCESS(NULL, retry_times, result);
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@ -134,7 +134,7 @@ static sfud_err spi_write_read(const sfud_spi *spi, const uint8_t *write_buf, si
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goto exit;
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}
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SPI_I2S_SendData(spi_dev->spix, send_data);
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/* 接收数据 */
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/* 接收数据 */
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retry_times = 1000;
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while (SPI_I2S_GetFlagStatus(spi_dev->spix, SPI_I2S_FLAG_RXNE) == RESET) {
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SFUD_RETRY_PROCESS(NULL, retry_times, result);
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@ -143,7 +143,7 @@ static sfud_err spi_write_read(const sfud_spi *spi, const uint8_t *write_buf, si
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goto exit;
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}
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read_data = SPI_I2S_ReceiveData(spi_dev->spix);
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/* 写缓冲区中的数据发完后，再读取 SPI 总线中的数据到读缓冲区 */
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/* 写缓冲区中的数据发完后，再读取 SPI 总线中的数据到读缓冲区 */
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if (i >= write_size) {
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*read_buf++ = read_data;
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}
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@ -167,13 +167,13 @@ sfud_err sfud_spi_port_init(sfud_flash *flash) {
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switch (flash->index) {
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case SFUD_SST25_DEVICE_INDEX: {
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/* RCC 初始化 */
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/* RCC 初始化 */
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rcc_configuration(&spi1);
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/* GPIO 初始化 */
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/* GPIO 初始化 */
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gpio_configuration(&spi1);
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/* SPI 外设初始化 */
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/* SPI 外设初始化 */
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spi_configuration(&spi1);
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/* 同步 Flash 移植所需的接口及数据 */
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/* 同步 Flash 移植所需的接口及数据 */
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flash->spi.wr = spi_write_read;
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flash->spi.lock = spi_lock;
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flash->spi.unlock = spi_unlock;
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Meco Man
5 years ago