最近在用MDK5.26系统自带的NXP的底层驱动，使用的过程中发现有些不合适自己的使用，所以就做一些相应的修改！ 1、引脚配置初始化部分，配置了SCK, MISO,MOSI,唯独漏了SSEL。虽然SSEL可以直接通过引脚编写控制，不过在代码里修改添加一下这条命令也不是太繁琐。就改一下，做个记录吧。 static int32_t SSPx_Initialize (ARM_SPI_SignalEvent_t cb_event, SSP_RESOURCES *ssp) { if (ssp->info->state & SSP_INITIALIZED) { return ARM_DRIVER_OK; } // Initialize SSP Run-Time Resources ssp->info->cb_event = cb_event; ssp->info->status.busy = 0U; ssp->info->status.data_lost = 0U; ssp->info->status.mode_fault = 0U; // Clear transfer information memset(ssp->xfer, 0, sizeof(SSP_TRANSFER_INFO)); #if defined (LPC175x_6x) PIN_Configure (ssp->pin.sck->Portnum, ssp->pin.sck->Pinnum, ssp->pin.sck_func, PIN_PINMODE_PULLUP, PIN_PINMODE_NORMAL); if (ssp->pin.miso != NULL) { PIN_Configure (ssp->pin.miso->Portnum, ssp->pin.miso->Pinnum, ssp->pin.miso_func, PIN_PINMODE_PULLUP, PIN_PINMODE_NORMAL); } if (ssp->pin.mosi != NULL) { PIN_Configure (ssp->pin.mosi->Portnum, ssp->pin.mosi->Pinnum, ssp->pin.mosi_func, PIN_PINMODE_PULLUP, PIN_PINMODE_NORMAL); } #elif defined (LPC177x_8x) PIN_Configure (ssp->pin.sck->Portnum, ssp->pin.sck->Pinnum, ssp->pin.sck_func | IOCON_HYS_ENABLE | ((ssp->pin.sck_io_wa) ? (IOCON_10ns_FILTER_DISABLE | IOCON_DIGITIAL_MODE) : IOCON_MODE_PULLUP)); if (ssp->pin.miso != NULL) { PIN_Configure (ssp->pin.miso->Portnum, ssp->pin.miso->Pinnum, ssp->pin.miso_func | IOCON_HYS_ENABLE | ((ssp->pin.miso_io_wa) ? (IOCON_10ns_FILTER_DISABLE | IOCON_DIGITIAL_MODE) : IOCON_MODE_PULLUP)); } if (ssp->pin.mosi != NULL) { PIN_Configure (ssp->pin.mosi->Portnum, ssp->pin.mosi->Pinnum, ssp->pin.mosi_func | IOCON_HYS_ENABLE | ((ssp->pin.mosi_io_wa) ? (IOCON_10ns_FILTER_DISABLE | IOCON_DIGITIAL_MODE) : IOCON_MODE_PULLUP)); } #endif // Configure DMA if it will be used if (ssp->dma.tx_en || ssp->dma.rx_en) { GPDMA_Initialize (); } if (ssp->dma.tx_en) { GPDMA_PeripheralSelect (ssp->dma.tx_req, 0U); } if (ssp->dma.rx_en) { GPDMA_PeripheralSelect (ssp->dma.rx_req, 0U); } ssp->info->state = SSP_INITIALIZED; // SSP is initialized return ARM_DRIVER_OK; } 修改为 static int32_t SSPx_Initialize (ARM_SPI_SignalEvent_t cb_event, SSP_RESOURCES *ssp) { if (ssp->info->state & SSP_INITIALIZED) { return ARM_DRIVER_OK; } // Initialize SSP Run-Time Resources ssp->info->cb_event = cb_event; ssp->info->status.busy = 0U; ssp->info->status.data_lost = 0U; ssp->info->status.mode_fault = 0U; // Clear transfer information memset(ssp->xfer, 0, sizeof(SSP_TRANSFER_INFO)); #if defined (LPC175x_6x) PIN_Configure (ssp->pin.sck->Portnum, ssp->pin.sck->Pinnum, ssp->pin.sck_func, PIN_PINMODE_PULLUP, PIN_PINMODE_NORMAL); if (ssp->pin.ssel != NULL){ PIN_Configure (ssp->pin.ssel->Portnum, ssp->pin.ssel->Pinnum, ssp->pin.ssel_func, PIN_PINMODE_PULLUP, PIN_PINMODE_NORMAL); } if (ssp->pin.miso != NULL) { PIN_Configure (ssp->pin.miso->Portnum, ssp->pin.miso->Pinnum, ssp->pin.miso_func, PIN_PINMODE_PULLUP, PIN_PINMODE_NORMAL); } if (ssp->pin.mosi != NULL) { PIN_Configure (ssp->pin.mosi->Portnum, ssp->pin.mosi->Pinnum, ssp->pin.mosi_func, PIN_PINMODE_PULLUP, PIN_PINMODE_NORMAL); } #elif defined (LPC177x_8x) PIN_Configure (ssp->pin.sck->Portnum, ssp->pin.sck->Pinnum, ssp->pin.sck_func | IOCON_HYS_ENABLE | ((ssp->pin.sck_io_wa) ? (IOCON_10ns_FILTER_DISABLE | IOCON_DIGITIAL_MODE) : IOCON_MODE_PULLUP)); if (ssp->pin.miso != NULL) { PIN_Configure (ssp->pin.miso->Portnum, ssp->pin.miso->Pinnum, ssp->pin.miso_func | IOCON_HYS_ENABLE | ((ssp->pin.miso_io_wa) ? (IOCON_10ns_FILTER_DISABLE | IOCON_DIGITIAL_MODE) : IOCON_MODE_PULLUP)); } if (ssp->pin.mosi != NULL) { PIN_Configure (ssp->pin.mosi->Portnum, ssp->pin.mosi->Pinnum, ssp->pin.mosi_func | IOCON_HYS_ENABLE | ((ssp->pin.mosi_io_wa) ? (IOCON_10ns_FILTER_DISABLE | IOCON_DIGITIAL_MODE) : IOCON_MODE_PULLUP)); } if (ssp->pin.ssel != NULL) { PIN_Configure (ssp->pin.ssel->Portnum, ssp->pin.ssel->Pinnum, ssp->pin.ssel_func | IOCON_HYS_ENABLE | ((ssp->pin.ssel_io_wa) ? (IOCON_10ns_FILTER_DISABLE | IOCON_DIGITIAL_MODE) : IOCON_MODE_PULLUP)); } #endif // Configure DMA if it will be used if (ssp->dma.tx_en || ssp->dma.rx_en) { GPDMA_Initialize (); } if (ssp->dma.tx_en) { GPDMA_PeripheralSelect (ssp->dma.tx_req, 0U); } if (ssp->dma.rx_en) { GPDMA_PeripheralSelect (ssp->dma.rx_req, 0U); } ssp->info->state = SSP_INITIALIZED; // SSP is initialized return ARM_DRIVER_OK; }