87 lines
1.6 KiB
C++
87 lines
1.6 KiB
C++
#ifndef __SPI_H__
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#define __SPI_H__
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#include "Device\Port.h"
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// Spi类
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class Spi
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{
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private:
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byte _index;
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void* _SPI;
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Pin Pins[4]; // NSS/CLK/MISO/MOSI
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OutputPort _nss;
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AlternatePort _clk;
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AlternatePort _miso;
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AlternatePort _mosi;
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void Init();
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public:
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int Speed; // 速度
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int Retry; // 等待重试次数，默认200
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int Error; // 错误次数
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bool Opened;
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Spi();
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// 使用端口和最大速度初始化Spi，因为需要分频，实际速度小于等于该速度
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Spi(SPI spi, uint speedHz = 9000000, bool useNss = true);
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~Spi();
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void Init(SPI spi, uint speedHz = 9000000, bool useNss = true);
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void SetPin(Pin clk = P0, Pin miso = P0, Pin mosi = P0, Pin nss = P0);
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void GetPin(Pin* clk = nullptr, Pin* miso = nullptr, Pin* mosi = nullptr, Pin* nss = nullptr);
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void Open();
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void Close();
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// 基础读写
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byte Write(byte data);
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ushort Write16(ushort data);
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// 批量读写。以字节数组长度为准
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void Write(const Buffer& bs);
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void Read(Buffer& bs);
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void Start(); // 拉低NSS，开始传输
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void Stop(); // 拉高NSS，停止传输
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private:
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static int GetPre(int index, uint& speedHz);
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void OnInit();
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void OnOpen();
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void OnClose();
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};
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// Spi会话类。初始化时打开Spi，超出作用域析构时关闭
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class SpiScope
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{
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private:
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Spi* _spi;
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public:
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SpiScope(Spi* spi)
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{
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_spi = spi;
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_spi->Start();
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}
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~SpiScope()
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{
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_spi->Stop();
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}
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};
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// Spi设备配置
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class SpiConfig
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{
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public:
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SPI Spi;
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Pin Irq;
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Pin Reset;
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};
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#endif
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