#include "BSPSpi.h"

#include <cpu.h>
#include <os.h>
#include <bsp_int.h>
#include <bsp_sys.h>
#include <lib_def.h>
#include <os_cpu.h>

#include "BSPSys.h"

#include "driverlib/sysctl.h"
#include "driverlib/gpio.h"
#include "driverlib/pin_map.h"
#include "driverlib/ssi.h"
#include "driverlib/interrupt.h"

#include "inc/hw_memmap.h"
#include "inc/hw_ssi.h"
#include "inc/hw_ints.h"

int8_t Bsp_SpiInit(uint8_t spi_id)
{
    INT32U pui32DataRx;
    switch (spi_id) {
        case BSP_SPI3:
            // 初始化GPIO口
            SysCtlPeripheralEnable(SYSCTL_PERIPH_SSI3);
            SysCtlPeripheralEnable(SPI3_SYS_PERIPH_GPIO);
            GPIOPinConfigure(SPI3_GPIO_CLK_CFG);
            GPIOPinConfigure(SPI3_GPIO_FSS_CFG);
            GPIOPinConfigure(SPI3_GPIO_RX_CFG);
            GPIOPinConfigure(SPI3_GPIO_TX_CFG); 
            // 配置SPI初始化的参数
            GPIOPinTypeSSI(SPI3_GPIO_BASE, SPI3_GPIO_CLK |  SPI3_GPIO_FSS |
                           SPI3_GPIO_RX | SPI3_GPIO_TX );
            SSIConfigSetExpClk(SSI3_BASE, BspGetSysClock(), SSI_FRF_MOTO_MODE_0,
                               SSI_MODE_MASTER, 1000000, 8);
            // 使能SPI时钟总线
            SSIEnable(SSI3_BASE);
            while(SSIDataGetNonBlocking(SSI3_BASE, &pui32DataRx));  // 清除接收缓冲区
            break;
    }
    return 0;
}

uint8_t Bsp_RWByte(uint8_t spi_id, uint8_t data)
{
    uint32_t rec = 0;
    CPU_SR_ALLOC();
    OS_ENTER_CRITICAL();
    switch (spi_id) {
        case BSP_SPI3:
            while(SSIDataGetNonBlocking(SSI3_BASE, &rec));  // 清除接收缓冲区
            SSIDataPut(SSI3_BASE, data);
            while (SSIBusy(SSI3_BASE));
            SSIDataGet(SSI3_BASE, &rec);
            break;
    }
    OS_EXIT_CRITICAL();
    return (uint8_t)(rec & 0xff);
}

void Bsp_SpiSetSpeed(uint8_t spi_id, uint32_t Speed)
{
    switch (spi_id) {
        case BSP_SPI3:
            SSIDisable(SSI3_BASE);
            SSIConfigSetExpClk(SSI3_BASE, BspGetSysClock(), 
                               SSI_FRF_MOTO_MODE_0, SSI_MODE_MASTER, 
                               Speed, 8);
            SSIEnable(SSI3_BASE);
            break;
    }
}

void Bsp_SpiCS(uint8_t spi_id, uint8_t value)
{
    switch (spi_id) {
        case BSP_SPI3:
            GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_2, 
                        value == 1 ? GPIO_PIN_2 : ~ GPIO_PIN_2);  // 低电平运行，高电平停止
            break;
    }
}