Implement HAL and apply macros across code-base
Implement AVR Platform
This commit is contained in:
Christopher Pepper
committed by
Scott Lahteine
Scott Lahteine
parent
fb04dfcda8
commit
4b16fa3272
213
Marlin/src/HAL/HAL_AVR/HAL_spi_AVR.cpp
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213
Marlin/src/HAL/HAL_AVR/HAL_spi_AVR.cpp
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/**
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* Marlin 3D Printer Firmware
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* Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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*
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* Based on Sprinter and grbl.
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* Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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/**
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* Originally from Arduino Sd2Card Library
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* Copyright (C) 2009 by William Greiman
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*/
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/**
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* Description: HAL for AVR - SPI functions
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*
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* For ARDUINO_ARCH_AVR
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*/
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#ifdef ARDUINO_ARCH_AVR
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// --------------------------------------------------------------------------
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// Includes
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// --------------------------------------------------------------------------
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#include "../../../MarlinConfig.h"
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// --------------------------------------------------------------------------
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// Public Variables
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// --------------------------------------------------------------------------
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// --------------------------------------------------------------------------
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// Public functions
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// --------------------------------------------------------------------------
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void spiBegin (void) {
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SET_OUTPUT(SS_PIN);
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WRITE(SS_PIN, HIGH);
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SET_OUTPUT(SCK_PIN);
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SET_INPUT(MISO_PIN);
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SET_OUTPUT(MOSI_PIN);
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#if DISABLED(SOFTWARE_SPI)
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// SS must be in output mode even it is not chip select
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SET_OUTPUT(SS_PIN);
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// set SS high - may be chip select for another SPI device
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#if SET_SPI_SS_HIGH
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WRITE(SS_PIN, HIGH);
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#endif // SET_SPI_SS_HIGH
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// set a default rate
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spiInit(1);
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#endif // SOFTWARE_SPI
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}
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//------------------------------------------------------------------------------
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#if DISABLED(SOFTWARE_SPI)
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// functions for hardware SPI
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//------------------------------------------------------------------------------
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// make sure SPCR rate is in expected bits
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#if (SPR0 != 0 || SPR1 != 1)
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#error "unexpected SPCR bits"
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#endif
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/**
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* Initialize hardware SPI
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* Set SCK rate to F_CPU/pow(2, 1 + spiRate) for spiRate [0,6]
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*/
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void spiInit(uint8_t spiRate) {
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// See avr processor documentation
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CBI(
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#ifdef PRR
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PRR
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#elif defined(PRR0)
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PRR0
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#endif
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, PRSPI);
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SPCR = _BV(SPE) | _BV(MSTR) | (spiRate >> 1);
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SPSR = spiRate & 1 || spiRate == 6 ? 0 : _BV(SPI2X);
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}
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//------------------------------------------------------------------------------
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/** SPI receive a byte */
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uint8_t spiRec(void) {
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SPDR = 0XFF;
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while (!TEST(SPSR, SPIF)) { /* Intentionally left empty */ }
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return SPDR;
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}
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//------------------------------------------------------------------------------
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/** SPI read data */
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void spiRead(uint8_t* buf, uint16_t nbyte) {
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if (nbyte-- == 0) return;
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SPDR = 0XFF;
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for (uint16_t i = 0; i < nbyte; i++) {
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while (!TEST(SPSR, SPIF)) { /* Intentionally left empty */ }
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buf[i] = SPDR;
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SPDR = 0XFF;
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}
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while (!TEST(SPSR, SPIF)) { /* Intentionally left empty */ }
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buf[nbyte] = SPDR;
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}
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//------------------------------------------------------------------------------
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/** SPI send a byte */
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void spiSend(uint8_t b) {
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SPDR = b;
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while (!TEST(SPSR, SPIF)) { /* Intentionally left empty */ }
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}
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//------------------------------------------------------------------------------
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/** SPI send block */
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void spiSendBlock(uint8_t token, const uint8_t* buf) {
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SPDR = token;
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for (uint16_t i = 0; i < 512; i += 2) {
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while (!TEST(SPSR, SPIF)) { /* Intentionally left empty */ }
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SPDR = buf[i];
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while (!TEST(SPSR, SPIF)) { /* Intentionally left empty */ }
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SPDR = buf[i + 1];
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}
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while (!TEST(SPSR, SPIF)) { /* Intentionally left empty */ }
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}
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//------------------------------------------------------------------------------
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#else // SOFTWARE_SPI
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//------------------------------------------------------------------------------
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/** nop to tune soft SPI timing */
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#define nop asm volatile ("\tnop\n")
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/** Set SPI rate */
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void spiInit(uint8_t spiRate) {
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// nothing to do
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UNUSED(spiRate);
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}
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//------------------------------------------------------------------------------
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/** Soft SPI receive byte */
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uint8_t spiRec() {
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uint8_t data = 0;
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// no interrupts during byte receive - about 8 us
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cli();
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// output pin high - like sending 0XFF
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WRITE(MOSI_PIN, HIGH);
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for (uint8_t i = 0; i < 8; i++) {
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WRITE(SCK_PIN, HIGH);
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// adjust so SCK is nice
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nop;
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nop;
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data <<= 1;
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if (READ(MISO_PIN)) data |= 1;
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WRITE(SCK_PIN, LOW);
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}
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// enable interrupts
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sei();
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return data;
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}
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//------------------------------------------------------------------------------
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/** Soft SPI read data */
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void spiRead(uint8_t* buf, uint16_t nbyte) {
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for (uint16_t i = 0; i < nbyte; i++)
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buf[i] = spiRec();
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}
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//------------------------------------------------------------------------------
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/** Soft SPI send byte */
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void spiSend(uint8_t data) {
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// no interrupts during byte send - about 8 us
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cli();
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for (uint8_t i = 0; i < 8; i++) {
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WRITE(SCK_PIN, LOW);
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WRITE(MOSI_PIN, data & 0X80);
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data <<= 1;
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WRITE(SCK_PIN, HIGH);
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}
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// hold SCK high for a few ns
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nop;
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nop;
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nop;
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nop;
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WRITE(SCK_PIN, LOW);
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// enable interrupts
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sei();
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}
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//------------------------------------------------------------------------------
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/** Soft SPI send block */
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void spiSendBlock(uint8_t token, const uint8_t* buf) {
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spiSend(token);
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for (uint16_t i = 0; i < 512; i++)
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spiSend(buf[i]);
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}
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#endif // SOFTWARE_SPI
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#endif // ARDUINO_ARCH_AVR
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