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/**
* Marlin 3D Printer Firmware
* Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
*
* Based on Sprinter and grbl.
* Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
#pragma once
#include "../../shared/HAL_SPI.h"
#include <stdint.h>
#include <lpc17xx_ssp.h>
#include <lpc17xx_gpdma.h>
//#define MSBFIRST 1
#define SPI_MODE0 0
#define SPI_MODE1 1
#define SPI_MODE2 2
#define SPI_MODE3 3
#define DATA_SIZE_8BIT SSP_DATABIT_8
#define DATA_SIZE_16BIT SSP_DATABIT_16
#define SPI_CLOCK_MAX_TFT 30000000UL
#define SPI_CLOCK_DIV2 8333333 //(SCR: 2) desired: 8,000,000 actual: 8,333,333 +4.2% SPI_FULL_SPEED
#define SPI_CLOCK_DIV4 4166667 //(SCR: 5) desired: 4,000,000 actual: 4,166,667 +4.2% SPI_HALF_SPEED
#define SPI_CLOCK_DIV8 2083333 //(SCR: 11) desired: 2,000,000 actual: 2,083,333 +4.2% SPI_QUARTER_SPEED
#define SPI_CLOCK_DIV16 1000000 //(SCR: 24) desired: 1,000,000 actual: 1,000,000 SPI_EIGHTH_SPEED
#define SPI_CLOCK_DIV32 500000 //(SCR: 49) desired: 500,000 actual: 500,000 SPI_SPEED_5
#define SPI_CLOCK_DIV64 250000 //(SCR: 99) desired: 250,000 actual: 250,000 SPI_SPEED_6
#define SPI_CLOCK_DIV128 125000 //(SCR:199) desired: 125,000 actual: 125,000 Default from HAL.h
#define SPI_CLOCK_MAX SPI_CLOCK_DIV2
#define BOARD_NR_SPI 2
//#define BOARD_SPI1_NSS_PIN PA4 ?!
#define BOARD_SPI1_SCK_PIN P0_15
#define BOARD_SPI1_MISO_PIN P0_17
#define BOARD_SPI1_MOSI_PIN P0_18
//#define BOARD_SPI2_NSS_PIN PB12 ?!
#define BOARD_SPI2_SCK_PIN P0_07
#define BOARD_SPI2_MISO_PIN P0_08
#define BOARD_SPI2_MOSI_PIN P0_09
class SPISettings {
public:
SPISettings(uint32_t spiRate, int inBitOrder, int inDataMode) {
init_AlwaysInline(spiRate2Clock(spiRate), inBitOrder, inDataMode, DATA_SIZE_8BIT);
}
SPISettings(uint32_t inClock, uint8_t inBitOrder, uint8_t inDataMode, uint32_t inDataSize) {
if (__builtin_constant_p(inClock))
init_AlwaysInline(inClock, inBitOrder, inDataMode, inDataSize);
else
init_MightInline(inClock, inBitOrder, inDataMode, inDataSize);
}
SPISettings() {
init_AlwaysInline(4000000, MSBFIRST, SPI_MODE0, DATA_SIZE_8BIT);
}
//uint32_t spiRate() const { return spi_speed; }
static inline uint32_t spiRate2Clock(uint32_t spiRate) {
uint32_t Marlin_speed[7]; // CPSR is always 2
Marlin_speed[0] = 8333333; //(SCR: 2) desired: 8,000,000 actual: 8,333,333 +4.2% SPI_FULL_SPEED
Marlin_speed[1] = 4166667; //(SCR: 5) desired: 4,000,000 actual: 4,166,667 +4.2% SPI_HALF_SPEED
Marlin_speed[2] = 2083333; //(SCR: 11) desired: 2,000,000 actual: 2,083,333 +4.2% SPI_QUARTER_SPEED
Marlin_speed[3] = 1000000; //(SCR: 24) desired: 1,000,000 actual: 1,000,000 SPI_EIGHTH_SPEED
Marlin_speed[4] = 500000; //(SCR: 49) desired: 500,000 actual: 500,000 SPI_SPEED_5
Marlin_speed[5] = 250000; //(SCR: 99) desired: 250,000 actual: 250,000 SPI_SPEED_6
Marlin_speed[6] = 125000; //(SCR:199) desired: 125,000 actual: 125,000 Default from HAL.h
return Marlin_speed[spiRate > 6 ? 6 : spiRate];
}
private:
void init_MightInline(uint32_t inClock, uint8_t inBitOrder, uint8_t inDataMode, uint32_t inDataSize) {
init_AlwaysInline(inClock, inBitOrder, inDataMode, inDataSize);
}
void init_AlwaysInline(uint32_t inClock, uint8_t inBitOrder, uint8_t inDataMode, uint32_t inDataSize) __attribute__((__always_inline__)) {
clock = inClock;
bitOrder = inBitOrder;
dataMode = inDataMode;
dataSize = inDataSize;
}
//uint32_t spi_speed;
uint32_t clock;
uint32_t dataSize;
//uint32_t clockDivider;
uint8_t bitOrder;
uint8_t dataMode;
LPC_SSP_TypeDef *spi_d;
friend class SPIClass;
};
/**
* @brief Wirish SPI interface.
*
* This is the same interface is available across HAL
*
* This implementation uses software slave management, so the caller
* is responsible for controlling the slave select line.
*/
class SPIClass {
public:
/**
* @param spiPortNumber Number of the SPI port to manage.
*/
SPIClass(uint8_t spiPortNumber);
/**
* Init using pins
*/
SPIClass(pin_t mosi, pin_t miso, pin_t sclk, pin_t ssel = (pin_t)-1);
/**
* Select and configure the current selected SPI device to use
*/
void begin();
/**
* Disable the current SPI device
*/
void end();
void beginTransaction(const SPISettings&);
void endTransaction() {}
// Transfer using 1 "Data Size"
uint8_t transfer(uint16_t data);
// Transfer 2 bytes in 8 bit mode
uint16_t transfer16(uint16_t data);
void send(uint8_t data);
uint16_t read();
void read(uint8_t *buf, uint32_t len);
void dmaSend(void *buf, uint16_t length, bool minc);
/**
* @brief Sets the number of the SPI peripheral to be used by
* this HardwareSPI instance.
*
* @param spi_num Number of the SPI port. 1-2 in low density devices
* or 1-3 in high density devices.
*/
void setModule(uint8_t device);
void setClock(uint32_t clock);
void setBitOrder(uint8_t bitOrder);
void setDataMode(uint8_t dataMode);
void setDataSize(uint32_t ds);
inline uint32_t getDataSize() { return _currentSetting->dataSize; }
private:
SPISettings _settings[BOARD_NR_SPI];
SPISettings *_currentSetting;
void updateSettings();
};
extern SPIClass SPI;
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