SPIは1-16MHzの速度に対応。スレーブ機能はデバッグしてないので動かないかも。
【ループバックテストのサンプル】
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#include "device.h" SpiConfig spi; void setup(void) { spi.mode(SpiConfig::MODE_3); } void loop(void) { spi.beginTransaction(); Spi::select(Spi::SEL_0); for (uint16 i = 0; i < 256; ++i) { uint8 b = Spi::transfer((uint8)i); if (b != i) { /* Spi Error */ break; } } Spi::unselect(); spi.endTransaction(); } |
【ライブラリ】
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/* spi.h - SPI Library for NXP-JN516x Copyright (c) 2022 Sasapea's Lab. All right reserved. This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #pragma once #include <jendefs.h> #include <AppHardwareApi.h> #include "printf.h" /* I/O Ports SCLK: DO0 MISO: DO1 MOSI: DIO18 SEL0: DIO19 SEL1: DIO0/DIO14 SEL2: DIO1/DIO15 */ #ifndef SPI_DEFAULT_SPEED #define SPI_DEFAULT_SPEED SPEED_8MHZ #endif #ifndef SPI_SLAVE_BUFFER_SIZE #define SPI_SLAVE_BUFFER_SIZE 128 // 1 to 255 bytes #endif #ifndef SPI_SLAVE_TIMEOUT #define SPI_SLAVE_TIMEOUT 1000 // 0 to 4095 us #endif #ifndef SPI_SLAVE_THRESHOLD #define SPI_SLAVE_THRESHOLD 10 // 0 to 100 % #endif class SpiConfig { public: typedef enum { MODE_0 = 0, MODE_1 = 1, MODE_2 = 2, MODE_3 = 3, } MODE; typedef enum { SPEED_16MHZ = 0, SPEED_8MHZ = 1, SPEED_4MHZ = 2, SPEED_2MHZ = 3, SPEED_1MHZ = 4, } SPEED; /* must be first call */ SpiConfig& mode(MODE mode) { _eMode = mode; _eSpeed = SPI_DEFAULT_SPEED; _bLsbFirst = false; _u8SlaveEnable = 2; // bit0, 1, 2 _bAutoSelect = false; _delayReadEdge = false; _prSpiCallback = 0; _configuration = 0; _bLocation = 0; _changed = true; return *this; } /* Clock divisor in the range 0 to 63. Peripheral clock is divided by 2 x u8ClockDivider, but 0 is a special value used when no clock division is required */ SpiConfig& speed(SPEED value) { if (_eSpeed != value) _changed = true; _eSpeed = value; return *this; } /* Enable/disable data transfer with the least significant bit (LSB) transferred first: TRUE - enable FALSE - disable */ SpiConfig& lsbFirst(bool value) { if (_bLsbFirst != value) _changed = true; _bLsbFirst = value; return *this; } /* Number of SPI slaves to control. Valid values are 0-3 (higher values are truncated to 3) */ SpiConfig& slaveEnable(uint8 value) { if (_u8SlaveEnable != value) _changed = true; _u8SlaveEnable = value; return *this; } /* Enable/disable automatic slave selection: TRUE - enable FALSE - disable */ SpiConfig& autoSelect(bool value) { if (_bAutoSelect != value) _changed = true; _bAutoSelect = value; return *this; } typedef enum { SELLOC_1 = E_AHI_SPISEL_1, SELLOC_2 = E_AHI_SPISEL_2, } SELLOC; /* DIO on which specified slave select line will operate: TRUE - DIO14 (SPISEL1) or DIO15 (SPISEL2) FALSE - DIO0 (SPISEL1) or DIO1 (SPISEL2) */ SpiConfig& location(SELLOC sel, bool value) { switch (sel) { case SELLOC_1: if (value) _bLocation |= (1 << SELLOC_1); else _bLocation &= ~(1 << SELLOC_1); break; case SELLOC_2: if (value) _bLocation |= (1 << SELLOC_2); else _bLocation &= ~(1 << SELLOC_2); break; } return *this; } SpiConfig& delayReadEdge(bool value) { _delayReadEdge = value; return *this; } /* * Pointer to callback function to be registered */ SpiConfig& callback(PR_HWINT_APPCALLBACK prSpiCallback) { if (_prSpiCallback != prSpiCallback) _changed = true; _prSpiCallback = prSpiCallback; return *this; } void beginTransaction(void) { if (!_changed) vAHI_SpiRestoreConfiguration(&_configuration); else { _changed = false; vAHI_SpiConfigure ( _u8SlaveEnable, _bLsbFirst, _eMode >> 1, _eMode & 1, _eSpeed, _prSpiCallback != 0, _bAutoSelect ); vAHI_SpiReadConfiguration(&_configuration); } vAHI_SpiSelSetLocation(E_AHI_SPISEL_1, _bLocation & (1 << SELLOC_1)); vAHI_SpiSelSetLocation(E_AHI_SPISEL_2, _bLocation & (1 << SELLOC_2)); vAHI_SpiSetDelayReadEdge(_delayReadEdge); if (_prSpiCallback) vAHI_SpiRegisterCallback(_prSpiCallback); _configured = true; } void endTransaction(void) { } static void end(void) { if (_configured) { _configured = false; vAHI_SpiDisable(); } } private: tSpiConfiguration _configuration; uint8 _bLocation; MODE _eMode; SPEED _eSpeed; bool _bLsbFirst; uint8 _u8SlaveEnable; bool _bAutoSelect; bool _delayReadEdge; PR_HWINT_APPCALLBACK _prSpiCallback; uint8 _changed; static uint8 _configured; friend class Spi; }; class Spi { public: typedef enum { SEL_0 = 1, // DIO19 SEL_1 = 2, // DIO0/DIO14 SEL_2 = 4, // DIO1/DIO15 } SEL; static void select(SEL u8SlaveMask) { vAHI_SpiSelect(u8SlaveMask); } static void unselect(void) { vAHI_SpiStop(); } static void writeAndRead(uint16 slave, const uint8 *pu8Write, uint16 u16WriteLen, uint8 *pu8Read, uint16 u16ReadLen) { select((SEL)slave); write(pu8Write, u16WriteLen); read(pu8Read, u16ReadLen); unselect(); } static void write(uint8 u8Out) { transfer(u8Out); } static void write(const uint8 *pu8Buf, uint16 u16Len) { if (pu8Buf) { while (u16Len--) write(*pu8Buf++); } } static void write16(uint16 u16Out) { transfer16(u16Out); } static void write16(const uint16 *pu16Buf, uint16 u16Len) { if (pu16Buf) { while (u16Len--) write16(*pu16Buf++); } } static void write32(uint32 u32Out) { transfer32(u32Out); } static void write32(const uint32 *pu32Buf, uint16 u16Len) { if (pu32Buf) { while (u16Len--) write32(*pu32Buf++); } } static uint8 read(void) { return transfer((uint8)-1); } static void read(uint8 *pu8Buf, uint16 u16Len) { if (pu8Buf) { for (uint32 i = 0; i < u16Len; ++i) *pu8Buf++ = read(); } } static uint16 read16(void) { return transfer16((uint16)-1); } static void read16(uint16 *pu16Buf, uint16 u16Len) { if (pu16Buf) { for (uint32 i = 0; i < u16Len; ++i) *pu16Buf++ = read16(); } } static uint32 read32(void) { return transfer32((uint32)-1); } static void read32(uint32 *pu32Buf, uint16 u16Len) { if (pu32Buf) { for (uint32 i = 0; i < u16Len; ++i) *pu32Buf++ = read32(); } } static uint8 transfer(uint8 u8Out) { return transfer(u8Out, 7); } static uint16 transfer16(uint16 u16Out) { return transfer(u16Out, 15); } static uint32 transfer32(uint32 u32Out) { return transfer(u32Out, 31); } static uint32 transfer(uint32 u32Out, uint8 u8CharLen) { vAHI_SpiStartTransfer(u8CharLen, u32Out); wait(); return u32AHI_SpiReadTransfer32(); } private: static bool busy(void) { // This function polls the SPI master to determine whether it is currently busy // performing a data transfer. return bAHI_SpiPollBusy(); } static void wait(void) { // This function waits for the SPI master to complete a transfer and then returns. vAHI_SpiWaitBusy(); } }; class SSpi { public: typedef enum { INTMASK_RX_FIRST = E_AHI_SPIS_INT_RX_FIRST_MASK, INTMASK_TX_LAST = E_AHI_SPIS_INT_TX_LAST_MASK, INTMASK_RX_CLIMB = E_AHI_SPIS_INT_RX_CLIMB_MASK, INTMASK_TX_FALL = E_AHI_SPIS_INT_TX_FALL_MASK, INTMASK_RX_OVER = E_AHI_SPIS_INT_RX_OVER_MASK, INTMASK_TX_OVER = E_AHI_SPIS_INT_TX_OVER_MASK, INTMASK_RX_UNDER = E_AHI_SPIS_INT_RX_UNDER_MASK, INTMASK_TX_UNDER = E_AHI_SPIS_INT_TX_UNDER_MASK, INTMASK_RX_TIMEOUT = E_AHI_SPIS_INT_RX_TIMEOUT_MASK, } INTMASK; static bool begin(bool bPinLocation = false, bool bLsbFirst = false, /*INTMASK*/uint16 imask = 0, PR_HWINT_APPCALLBACK prSpiCallback = 0) { if (prSpiCallback) vAHI_SpiSlaveRegisterCallback(prSpiCallback); else imask = 0; return bAHI_SpiSlaveEnable ( bPinLocation, bLsbFirst, _u8TxBuffer, SPI_SLAVE_BUFFER_SIZE, SPI_SLAVE_BUFFER_SIZE * SPI_SLAVE_THRESHOLD / 100, // an interrupt will be generated when the amount of data in the buffer falls below this level _u8RxBuffer, SPI_SLAVE_BUFFER_SIZE, SPI_SLAVE_BUFFER_SIZE * (100 - SPI_SLAVE_THRESHOLD) / 100, // an interrupt will be generated when the amount of data in the buffer rises above this level SPI_SLAVE_TIMEOUT, imask ); } static void end(void) { vAHI_SpiSlaveDisable(); } static void reset(bool bTxReset, bool bRxReset) { vAHI_SpiSlaveReset(bTxReset, bRxReset); } static uint8 availableForWrite(void) { return SPI_SLAVE_BUFFER_SIZE - u8AHI_SpiSlaveTxFillLevel(); } static uint16 write8(uint8 u8Byte) { if (!availableForWrite()) return 0; vAHI_SpiSlaveTxWriteByte(u8Byte); return 1; } static uint16 write8(const uint8 *pu8Buf, uint16 u16Len) { uint16 cnt; for (cnt = 0; cnt < u16Len; ++cnt) { if (!write8(*pu8Buf++)) break; } return cnt; } static uint8 available(void) { return u8AHI_SpiSlaveRxFillLevel(); } static int read8(void) { return available() ? u8AHI_SpiSlaveRxReadByte() : -1; } static uint16 read8(uint8 *pu8Buf, uint16 u16Len) { uint16 cnt; for (cnt = 0; cnt < u16Len; ++cnt) { int b; if ((b = read8()) < 0) break; *pu8Buf++ = b; } return cnt; } static uint8 status(void) { return u8AHI_SpiSlaveStatus(); } private: static uint8 _u8TxBuffer[SPI_SLAVE_BUFFER_SIZE]; static uint8 _u8RxBuffer[SPI_SLAVE_BUFFER_SIZE]; }; |
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/* spi.cpp - SPI Library for NXP-JN516x Copyright (c) 2022 Sasapea's Lab. All right reserved. This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "spi.h" uint8 SpiConfig::_configured; uint8 SSpi::_u8TxBuffer[]; uint8 SSpi::_u8RxBuffer[]; |
次回は、ADCの予定
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