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Arduino/hardware/arduino/sam/libraries/SPI/SPI.h

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Adding SAM specific libraries
2011-06-21 00:03:22 +02:00
/*
* Copyright (c) 2010 by Cristian Maglie <c.maglie@bug.st>
SPI Transactions for Arduino Due
2014-08-01 14:57:13 +02:00
* Copyright (c) 2014 by Paul Stoffregen <paul@pjrc.com> (Transaction API)
Adding SAM specific libraries
2011-06-21 00:03:22 +02:00
* SPI Master library for arduino.
*
* This file is free software; you can redistribute it and/or modify
* it under the terms of either the GNU General Public License version 2
* or the GNU Lesser General Public License version 2.1, both as
* published by the Free Software Foundation.
*/
#ifndef _SPI_H_INCLUDED
#define _SPI_H_INCLUDED
[sam] UART/USART write(char) working and cmsis update
2011-09-16 23:07:44 +02:00
#include "variant.h"
Adding SAM specific libraries
2011-06-21 00:03:22 +02:00
#include <stdio.h>
Add SPI_HAS_TRANSACTION symbol for Arduino Due
2014-08-01 22:00:29 +02:00
// SPI_HAS_TRANSACTION means SPI has beginTransaction(), endTransaction(),
// usingInterrupt(), and SPISetting(clock, bitOrder, dataMode)
#define SPI_HAS_TRANSACTION 1
[sam] SPI Fixed modes constants
2012-04-24 18:43:33 +02:00
#define SPI_MODE0 0x02
#define SPI_MODE1 0x00
#define SPI_MODE2 0x03
#define SPI_MODE3 0x01
Adding SAM specific libraries
2011-06-21 00:03:22 +02:00
[sam] Refactoring API for SPI library
2012-05-18 01:30:54 +02:00
enum SPITransferMode {
SPI_CONTINUE,
SPI_LAST
};
SPI Transactions for Arduino Due
2014-08-01 14:57:13 +02:00
class SPISettings {
public:
SPISettings(uint32_t clock, BitOrder bitOrder, uint8_t dataMode) {
if (__builtin_constant_p(clock)) {
init_AlwaysInline(clock, bitOrder, dataMode);
} else {
init_MightInline(clock, bitOrder, dataMode);
}
}
SPISettings() {
init_AlwaysInline(4000000, MSBFIRST, SPI_MODE0);
}
private:
void init_MightInline(uint32_t clock, BitOrder bitOrder, uint8_t dataMode) {
init_AlwaysInline(clock, bitOrder, dataMode);
}
void init_AlwaysInline(uint32_t clock, BitOrder bitOrder, uint8_t dataMode)
__attribute__((__always_inline__)) {
uint8_t div;
border = bitOrder;
if (__builtin_constant_p(clock)) {
if (clock >= F_CPU / 2) div = 2;
else if (clock >= F_CPU / 3) div = 3;
else if (clock >= F_CPU / 4) div = 4;
else if (clock >= F_CPU / 5) div = 5;
else if (clock >= F_CPU / 6) div = 6;
else if (clock >= F_CPU / 7) div = 7;
else if (clock >= F_CPU / 8) div = 8;
else if (clock >= F_CPU / 9) div = 9;
else if (clock >= F_CPU / 10) div = 10;
else if (clock >= F_CPU / 11) div = 11;
else if (clock >= F_CPU / 12) div = 12;
else if (clock >= F_CPU / 13) div = 13;
else if (clock >= F_CPU / 14) div = 14;
else if (clock >= F_CPU / 15) div = 15;
else if (clock >= F_CPU / 16) div = 16;
else if (clock >= F_CPU / 17) div = 17;
else if (clock >= F_CPU / 18) div = 18;
else if (clock >= F_CPU / 19) div = 19;
else if (clock >= F_CPU / 20) div = 20;
else if (clock >= F_CPU / 21) div = 21;
else if (clock >= F_CPU / 22) div = 22;
else if (clock >= F_CPU / 23) div = 23;
else if (clock >= F_CPU / 24) div = 24;
else if (clock >= F_CPU / 25) div = 25;
else if (clock >= F_CPU / 26) div = 26;
else if (clock >= F_CPU / 27) div = 27;
else if (clock >= F_CPU / 28) div = 28;
else if (clock >= F_CPU / 29) div = 29;
else if (clock >= F_CPU / 30) div = 30;
else if (clock >= F_CPU / 31) div = 31;
else if (clock >= F_CPU / 32) div = 32;
else if (clock >= F_CPU / 33) div = 33;
else if (clock >= F_CPU / 34) div = 34;
else if (clock >= F_CPU / 35) div = 35;
else if (clock >= F_CPU / 36) div = 36;
else if (clock >= F_CPU / 37) div = 37;
else if (clock >= F_CPU / 38) div = 38;
else if (clock >= F_CPU / 39) div = 39;
else if (clock >= F_CPU / 40) div = 40;
else if (clock >= F_CPU / 41) div = 41;
else if (clock >= F_CPU / 42) div = 42;
else if (clock >= F_CPU / 43) div = 43;
else if (clock >= F_CPU / 44) div = 44;
else if (clock >= F_CPU / 45) div = 45;
else if (clock >= F_CPU / 46) div = 46;
else if (clock >= F_CPU / 47) div = 47;
else if (clock >= F_CPU / 48) div = 48;
else if (clock >= F_CPU / 49) div = 49;
else if (clock >= F_CPU / 50) div = 50;
else if (clock >= F_CPU / 51) div = 51;
else if (clock >= F_CPU / 52) div = 52;
else if (clock >= F_CPU / 53) div = 53;
else if (clock >= F_CPU / 54) div = 54;
else if (clock >= F_CPU / 55) div = 55;
else if (clock >= F_CPU / 56) div = 56;
else if (clock >= F_CPU / 57) div = 57;
else if (clock >= F_CPU / 58) div = 58;
else if (clock >= F_CPU / 59) div = 59;
else if (clock >= F_CPU / 60) div = 60;
else if (clock >= F_CPU / 61) div = 61;
else if (clock >= F_CPU / 62) div = 62;
else if (clock >= F_CPU / 63) div = 63;
else if (clock >= F_CPU / 64) div = 64;
else if (clock >= F_CPU / 65) div = 65;
else if (clock >= F_CPU / 66) div = 66;
else if (clock >= F_CPU / 67) div = 67;
else if (clock >= F_CPU / 68) div = 68;
else if (clock >= F_CPU / 69) div = 69;
else if (clock >= F_CPU / 70) div = 70;
else if (clock >= F_CPU / 71) div = 71;
else if (clock >= F_CPU / 72) div = 72;
else if (clock >= F_CPU / 73) div = 73;
else if (clock >= F_CPU / 74) div = 74;
else if (clock >= F_CPU / 75) div = 75;
else if (clock >= F_CPU / 76) div = 76;
else if (clock >= F_CPU / 77) div = 77;
else if (clock >= F_CPU / 78) div = 78;
else if (clock >= F_CPU / 79) div = 79;
else if (clock >= F_CPU / 80) div = 80;
else if (clock >= F_CPU / 81) div = 81;
else if (clock >= F_CPU / 82) div = 82;
else if (clock >= F_CPU / 83) div = 83;
else if (clock >= F_CPU / 84) div = 84;
else if (clock >= F_CPU / 85) div = 85;
else if (clock >= F_CPU / 86) div = 86;
else if (clock >= F_CPU / 87) div = 87;
else if (clock >= F_CPU / 88) div = 88;
else if (clock >= F_CPU / 89) div = 89;
else if (clock >= F_CPU / 90) div = 90;
else if (clock >= F_CPU / 91) div = 91;
else if (clock >= F_CPU / 92) div = 92;
else if (clock >= F_CPU / 93) div = 93;
else if (clock >= F_CPU / 94) div = 94;
else if (clock >= F_CPU / 95) div = 95;
else if (clock >= F_CPU / 96) div = 96;
else if (clock >= F_CPU / 97) div = 97;
else if (clock >= F_CPU / 98) div = 98;
else if (clock >= F_CPU / 99) div = 99;
else if (clock >= F_CPU / 100) div = 100;
else if (clock >= F_CPU / 101) div = 101;
else if (clock >= F_CPU / 102) div = 102;
else if (clock >= F_CPU / 103) div = 103;
else if (clock >= F_CPU / 104) div = 104;
else if (clock >= F_CPU / 105) div = 105;
else if (clock >= F_CPU / 106) div = 106;
else if (clock >= F_CPU / 107) div = 107;
else if (clock >= F_CPU / 108) div = 108;
else if (clock >= F_CPU / 109) div = 109;
else if (clock >= F_CPU / 110) div = 110;
else if (clock >= F_CPU / 111) div = 111;
else if (clock >= F_CPU / 112) div = 112;
else if (clock >= F_CPU / 113) div = 113;
else if (clock >= F_CPU / 114) div = 114;
else if (clock >= F_CPU / 115) div = 115;
else if (clock >= F_CPU / 116) div = 116;
else if (clock >= F_CPU / 117) div = 117;
else if (clock >= F_CPU / 118) div = 118;
else if (clock >= F_CPU / 119) div = 119;
else if (clock >= F_CPU / 120) div = 120;
else if (clock >= F_CPU / 121) div = 121;
else if (clock >= F_CPU / 122) div = 122;
else if (clock >= F_CPU / 123) div = 123;
else if (clock >= F_CPU / 124) div = 124;
else if (clock >= F_CPU / 125) div = 125;
else if (clock >= F_CPU / 126) div = 126;
else if (clock >= F_CPU / 127) div = 127;
else if (clock >= F_CPU / 128) div = 128;
else if (clock >= F_CPU / 129) div = 129;
else if (clock >= F_CPU / 130) div = 130;
else if (clock >= F_CPU / 131) div = 131;
else if (clock >= F_CPU / 132) div = 132;
else if (clock >= F_CPU / 133) div = 133;
else if (clock >= F_CPU / 134) div = 134;
else if (clock >= F_CPU / 135) div = 135;
else if (clock >= F_CPU / 136) div = 136;
else if (clock >= F_CPU / 137) div = 137;
else if (clock >= F_CPU / 138) div = 138;
else if (clock >= F_CPU / 139) div = 139;
else if (clock >= F_CPU / 140) div = 140;
else if (clock >= F_CPU / 141) div = 141;
else if (clock >= F_CPU / 142) div = 142;
else if (clock >= F_CPU / 143) div = 143;
else if (clock >= F_CPU / 144) div = 144;
else if (clock >= F_CPU / 145) div = 145;
else if (clock >= F_CPU / 146) div = 146;
else if (clock >= F_CPU / 147) div = 147;
else if (clock >= F_CPU / 148) div = 148;
else if (clock >= F_CPU / 149) div = 149;
else if (clock >= F_CPU / 150) div = 150;
else if (clock >= F_CPU / 151) div = 151;
else if (clock >= F_CPU / 152) div = 152;
else if (clock >= F_CPU / 153) div = 153;
else if (clock >= F_CPU / 154) div = 154;
else if (clock >= F_CPU / 155) div = 155;
else if (clock >= F_CPU / 156) div = 156;
else if (clock >= F_CPU / 157) div = 157;
else if (clock >= F_CPU / 158) div = 158;
else if (clock >= F_CPU / 159) div = 159;
else if (clock >= F_CPU / 160) div = 160;
else if (clock >= F_CPU / 161) div = 161;
else if (clock >= F_CPU / 162) div = 162;
else if (clock >= F_CPU / 163) div = 163;
else if (clock >= F_CPU / 164) div = 164;
else if (clock >= F_CPU / 165) div = 165;
else if (clock >= F_CPU / 166) div = 166;
else if (clock >= F_CPU / 167) div = 167;
else if (clock >= F_CPU / 168) div = 168;
else if (clock >= F_CPU / 169) div = 169;
else if (clock >= F_CPU / 170) div = 170;
else if (clock >= F_CPU / 171) div = 171;
else if (clock >= F_CPU / 172) div = 172;
else if (clock >= F_CPU / 173) div = 173;
else if (clock >= F_CPU / 174) div = 174;
else if (clock >= F_CPU / 175) div = 175;
else if (clock >= F_CPU / 176) div = 176;
else if (clock >= F_CPU / 177) div = 177;
else if (clock >= F_CPU / 178) div = 178;
else if (clock >= F_CPU / 179) div = 179;
else if (clock >= F_CPU / 180) div = 180;
else if (clock >= F_CPU / 181) div = 181;
else if (clock >= F_CPU / 182) div = 182;
else if (clock >= F_CPU / 183) div = 183;
else if (clock >= F_CPU / 184) div = 184;
else if (clock >= F_CPU / 185) div = 185;
else if (clock >= F_CPU / 186) div = 186;
else if (clock >= F_CPU / 187) div = 187;
else if (clock >= F_CPU / 188) div = 188;
else if (clock >= F_CPU / 189) div = 189;
else if (clock >= F_CPU / 190) div = 190;
else if (clock >= F_CPU / 191) div = 191;
else if (clock >= F_CPU / 192) div = 192;
else if (clock >= F_CPU / 193) div = 193;
else if (clock >= F_CPU / 194) div = 194;
else if (clock >= F_CPU / 195) div = 195;
else if (clock >= F_CPU / 196) div = 196;
else if (clock >= F_CPU / 197) div = 197;
else if (clock >= F_CPU / 198) div = 198;
else if (clock >= F_CPU / 199) div = 199;
else if (clock >= F_CPU / 200) div = 200;
else if (clock >= F_CPU / 201) div = 201;
else if (clock >= F_CPU / 202) div = 202;
else if (clock >= F_CPU / 203) div = 203;
else if (clock >= F_CPU / 204) div = 204;
else if (clock >= F_CPU / 205) div = 205;
else if (clock >= F_CPU / 206) div = 206;
else if (clock >= F_CPU / 207) div = 207;
else if (clock >= F_CPU / 208) div = 208;
else if (clock >= F_CPU / 209) div = 209;
else if (clock >= F_CPU / 210) div = 210;
else if (clock >= F_CPU / 211) div = 211;
else if (clock >= F_CPU / 212) div = 212;
else if (clock >= F_CPU / 213) div = 213;
else if (clock >= F_CPU / 214) div = 214;
else if (clock >= F_CPU / 215) div = 215;
else if (clock >= F_CPU / 216) div = 216;
else if (clock >= F_CPU / 217) div = 217;
else if (clock >= F_CPU / 218) div = 218;
else if (clock >= F_CPU / 219) div = 219;
else if (clock >= F_CPU / 220) div = 220;
else if (clock >= F_CPU / 221) div = 221;
else if (clock >= F_CPU / 222) div = 222;
else if (clock >= F_CPU / 223) div = 223;
else if (clock >= F_CPU / 224) div = 224;
else if (clock >= F_CPU / 225) div = 225;
else if (clock >= F_CPU / 226) div = 226;
else if (clock >= F_CPU / 227) div = 227;
else if (clock >= F_CPU / 228) div = 228;
else if (clock >= F_CPU / 229) div = 229;
else if (clock >= F_CPU / 230) div = 230;
else if (clock >= F_CPU / 231) div = 231;
else if (clock >= F_CPU / 232) div = 232;
else if (clock >= F_CPU / 233) div = 233;
else if (clock >= F_CPU / 234) div = 234;
else if (clock >= F_CPU / 235) div = 235;
else if (clock >= F_CPU / 236) div = 236;
else if (clock >= F_CPU / 237) div = 237;
else if (clock >= F_CPU / 238) div = 238;
else if (clock >= F_CPU / 239) div = 239;
else if (clock >= F_CPU / 240) div = 240;
else if (clock >= F_CPU / 241) div = 241;
else if (clock >= F_CPU / 242) div = 242;
else if (clock >= F_CPU / 243) div = 243;
else if (clock >= F_CPU / 244) div = 244;
else if (clock >= F_CPU / 245) div = 245;
else if (clock >= F_CPU / 246) div = 246;
else if (clock >= F_CPU / 247) div = 247;
else if (clock >= F_CPU / 248) div = 248;
else if (clock >= F_CPU / 249) div = 249;
else if (clock >= F_CPU / 250) div = 250;
else if (clock >= F_CPU / 251) div = 251;
else if (clock >= F_CPU / 252) div = 252;
else if (clock >= F_CPU / 253) div = 253;
else if (clock >= F_CPU / 254) div = 254;
else /* clock >= F_CPU / 255 */ div = 255;
/*
#! /usr/bin/perl
for ($i=2; $i<256; $i++) {
printf "\t\t\telse if (clock >= F_CPU / %3d) div = %3d;\n", $i, $i;
}
*/
} else {
for (div=2; div<255; div++) {
if (clock >= F_CPU / div) break;
}
}
config = (dataMode & 3) | SPI_CSR_CSAAT | SPI_CSR_SCBR(div) | SPI_CSR_DLYBCT(1);
}
uint32_t config;
BitOrder border;
friend class SPIClass;
};
SPI lib (WIP)
2011-12-02 16:29:50 +01:00
class SPIClass {
[sam] merging CMSIS with current internal dev
2011-10-11 20:46:18 +02:00
public:
[sam] Refactoring API for SPI library
2012-05-18 01:30:54 +02:00
SPIClass(Spi *_spi, uint32_t _id, void(*_initCb)(void));
Adding SAM specific libraries
2011-06-21 00:03:22 +02:00
SPI library compatibility fix
2012-06-09 15:02:51 +02:00
byte transfer(uint8_t _data, SPITransferMode _mode = SPI_LAST) { return transfer(BOARD_SPI_DEFAULT_SS, _data, _mode); }
[sam] Refactoring API for SPI library
2012-05-18 01:30:54 +02:00
byte transfer(byte _channel, uint8_t _data, SPITransferMode _mode = SPI_LAST);
Adding SAM specific libraries
2011-06-21 00:03:22 +02:00
SPI Transactions for Arduino Due
2014-08-01 14:57:13 +02:00
// Transaction Functions
void usingInterrupt(uint8_t interruptNumber);
void beginTransaction(uint8_t pin, SPISettings settings);
void beginTransaction(SPISettings settings) {
beginTransaction(BOARD_SPI_DEFAULT_SS, settings);
}
void endTransaction(void);
Adding SAM specific libraries
2011-06-21 00:03:22 +02:00
SPI Transactions for Arduino Due
2014-08-01 14:57:13 +02:00
// SPI Configuration methods
SPI lib (WIP)
2011-12-02 16:29:50 +01:00
void attachInterrupt(void);
[sam] bugfix for SPI on SAM3*. Extended API for SPI master devices is in ALPHA, to be validated.
2012-04-24 09:31:50 +02:00
void detachInterrupt(void);
Adding SAM specific libraries
2011-06-21 00:03:22 +02:00
SPI library compatibility fix
2012-06-09 15:02:51 +02:00
void begin(void);
SPI lib (WIP)
2011-12-02 16:29:50 +01:00
void end(void);
Adding SAM specific libraries
2011-06-21 00:03:22 +02:00
SPI: added setBitOrder support; added end(pin) method.
2012-08-24 15:23:50 +02:00
// Attach/Detach pin to/from SPI controller
void begin(uint8_t _pin);
void end(uint8_t _pin);
SPI: Removed methods that sets params for all channels. Added default PIN (unconnected on Due Board).
2012-06-03 23:35:08 +02:00
// These methods sets a parameter on a single pin
SPI: added setBitOrder support; added end(pin) method.
2012-08-24 15:23:50 +02:00
void setBitOrder(uint8_t _pin, BitOrder);
void setDataMode(uint8_t _pin, uint8_t);
void setClockDivider(uint8_t _pin, uint8_t);
[sam] bugfix for SPI on SAM3*. Extended API for SPI master devices is in ALPHA, to be validated.
2012-04-24 09:31:50 +02:00
SPI: added setBitOrder support; added end(pin) method.
2012-08-24 15:23:50 +02:00
// These methods sets the same parameters but on default pin BOARD_SPI_DEFAULT_SS
void setBitOrder(BitOrder _order) { setBitOrder(BOARD_SPI_DEFAULT_SS, _order); };
SPI library compatibility fix
2012-06-09 15:02:51 +02:00
void setDataMode(uint8_t _mode) { setDataMode(BOARD_SPI_DEFAULT_SS, _mode); };
void setClockDivider(uint8_t _div) { setClockDivider(BOARD_SPI_DEFAULT_SS, _div); };
SPI: Removed methods that sets params for all channels. Added default PIN (unconnected on Due Board).
2012-06-03 23:35:08 +02:00
SPI lib (WIP)
2011-12-02 16:29:50 +01:00
private:
Fix in sam SPI library initialization when using multiple CS (extended API). http://forum.arduino.cc/index.php?topic=189682.0
2013-09-24 14:20:23 +02:00
void init();
SPI lib (WIP)
2011-12-02 16:29:50 +01:00
Spi *spi;
[sam] bugfix for SPI on SAM3*. Extended API for SPI master devices is in ALPHA, to be validated.
2012-04-24 09:31:50 +02:00
uint32_t id;
SPI: added setBitOrder support; added end(pin) method.
2012-08-24 15:23:50 +02:00
BitOrder bitOrder[SPI_CHANNELS_NUM];
[sam] bugfix for SPI on SAM3*. Extended API for SPI master devices is in ALPHA, to be validated.
2012-04-24 09:31:50 +02:00
uint32_t divider[SPI_CHANNELS_NUM];
uint32_t mode[SPI_CHANNELS_NUM];
SPI initialization fix. Seems working need more testing
2011-12-05 19:21:19 +01:00
void (*initCb)(void);
Fix in sam SPI library initialization when using multiple CS (extended API). http://forum.arduino.cc/index.php?topic=189682.0
2013-09-24 14:20:23 +02:00
bool initialized;
SPI Transactions for Arduino Due
2014-08-01 14:57:13 +02:00
uint8_t interruptMode; // 0=none, 1=mask, 2=global
uint8_t interruptMask; // bits 0:3=pin change
uint8_t interruptSave; // temp storage, to restore state
SPI lib (WIP)
2011-12-02 16:29:50 +01:00
};
#if SPI_INTERFACES_COUNT > 0
[sam] Refactoring API for SPI library
2012-05-18 01:30:54 +02:00
extern SPIClass SPI;
SPI lib (WIP)
2011-12-02 16:29:50 +01:00
#endif
Adding SAM specific libraries
2011-06-21 00:03:22 +02:00
SPI Transactions for Arduino Due
2014-08-01 14:57:13 +02:00
// For compatibility with sketches designed for AVR @ 16 MHz
// New programs should use SPI.beginTransaction to set the SPI clock
#define SPI_CLOCK_DIV2 11
#define SPI_CLOCK_DIV4 21
#define SPI_CLOCK_DIV8 42
#define SPI_CLOCK_DIV16 84
#define SPI_CLOCK_DIV32 168
#define SPI_CLOCK_DIV64 255
#define SPI_CLOCK_DIV128 255
Adding SAM specific libraries
2011-06-21 00:03:22 +02:00
#endif
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