From 29bc12e762c2e631a79d2576ae43d42d1c09794e Mon Sep 17 00:00:00 2001
From: Cristian Maglie <c.maglie@arduino.cc>
Date: Fri, 5 Sep 2014 10:05:01 +0200
Subject: [PATCH] Added stub for SPI transactions
---
libraries/SPI/SPI.cpp | 19 +++
libraries/SPI/SPI.h | 300 ++++++++++++++++++++++++++++++++++++++++++
2 files changed, 319 insertions(+)
diff --git a/libraries/SPI/SPI.cpp b/libraries/SPI/SPI.cpp
index 2d428731..4f520a27 100644
--- a/libraries/SPI/SPI.cpp
+++ b/libraries/SPI/SPI.cpp
@@ -43,6 +43,25 @@ void SPIClass::end()
_p_sercom->resetSPI();
}
+
+void SPIClass::usingInterrupt(uint8_t interruptNumber)
+{
+ // XXX: TODO
+}
+
+void SPIClass::beginTransaction(SPISettings settings)
+{
+ // XXX: TODO
+ setBitOrder(settings.bitOrder);
+ setClockDivider(settings.clockDiv);
+ setDataMode(settings.dataMode);
+}
+
+void SPIClass::endTransaction(void)
+{
+ // XXX: TODO
+}
+
void SPIClass::setBitOrder(BitOrder order)
{
if(order == LSBFIRST)
diff --git a/libraries/SPI/SPI.h b/libraries/SPI/SPI.h
index 2560243e..b40c84cf 100644
--- a/libraries/SPI/SPI.h
+++ b/libraries/SPI/SPI.h
@@ -18,12 +18,312 @@
#define SPI_MODE2 0x03
#define SPI_MODE3 0x01
+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;
+ 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;
+ }
+ }
+ this->clockDiv = div;
+ this->dataMode = dataMode;
+ this->bitOrder = bitOrder;
+ }
+ uint8_t clockDiv, dataMode;
+ BitOrder bitOrder;
+ friend class SPIClass;
+
+};
+
class SPIClass {
public:
SPIClass(SERCOM *p_sercom, uint8_t uc_pinMISO, uint8_t uc_pinSCK, uint8_t uc_pinMOSI);
byte transfer(uint8_t data);
+ // Transaction Functions
+ void usingInterrupt(uint8_t interruptNumber);
+ void beginTransaction(SPISettings settings);
+ void endTransaction(void);
+
// SPI Configuration methods
void attachInterrupt();
void detachInterrupt();
--
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