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cmagliecmaglie
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Added stub for SPI transactions
1 parent 891b984 commit 29bc12e

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2 files changed

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-0
lines changed

2 files changed

+319
-0
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‎libraries/SPI/SPI.cpp

+19
Original file line numberDiff line numberDiff line change
@@ -43,6 +43,25 @@ void SPIClass::end()
4343
_p_sercom->resetSPI();
4444
}
4545

46+
47+
void SPIClass::usingInterrupt(uint8_t interruptNumber)
48+
{
49+
// XXX: TODO
50+
}
51+
52+
void SPIClass::beginTransaction(SPISettings settings)
53+
{
54+
// XXX: TODO
55+
setBitOrder(settings.bitOrder);
56+
setClockDivider(settings.clockDiv);
57+
setDataMode(settings.dataMode);
58+
}
59+
60+
void SPIClass::endTransaction(void)
61+
{
62+
// XXX: TODO
63+
}
64+
4665
void SPIClass::setBitOrder(BitOrder order)
4766
{
4867
if(order == LSBFIRST)

‎libraries/SPI/SPI.h

+300
Original file line numberDiff line numberDiff line change
@@ -18,12 +18,312 @@
1818
#define SPI_MODE2 0x03
1919
#define SPI_MODE3 0x01
2020

21+
class SPISettings {
22+
public:
23+
SPISettings(uint32_t clock, BitOrder bitOrder, uint8_t dataMode) {
24+
if (__builtin_constant_p(clock)) {
25+
init_AlwaysInline(clock, bitOrder, dataMode);
26+
} else {
27+
init_MightInline(clock, bitOrder, dataMode);
28+
}
29+
}
30+
SPISettings() {
31+
init_AlwaysInline(4000000, MSBFIRST, SPI_MODE0);
32+
}
33+
private:
34+
void init_MightInline(uint32_t clock, BitOrder bitOrder, uint8_t dataMode) {
35+
init_AlwaysInline(clock, bitOrder, dataMode);
36+
}
37+
void init_AlwaysInline(uint32_t clock, BitOrder bitOrder, uint8_t dataMode)
38+
__attribute__((__always_inline__)) {
39+
uint8_t div;
40+
if (__builtin_constant_p(clock)) {
41+
if (clock >= F_CPU / 2) div = 2;
42+
else if (clock >= F_CPU / 3) div = 3;
43+
else if (clock >= F_CPU / 4) div = 4;
44+
else if (clock >= F_CPU / 5) div = 5;
45+
else if (clock >= F_CPU / 6) div = 6;
46+
else if (clock >= F_CPU / 7) div = 7;
47+
else if (clock >= F_CPU / 8) div = 8;
48+
else if (clock >= F_CPU / 9) div = 9;
49+
else if (clock >= F_CPU / 10) div = 10;
50+
else if (clock >= F_CPU / 11) div = 11;
51+
else if (clock >= F_CPU / 12) div = 12;
52+
else if (clock >= F_CPU / 13) div = 13;
53+
else if (clock >= F_CPU / 14) div = 14;
54+
else if (clock >= F_CPU / 15) div = 15;
55+
else if (clock >= F_CPU / 16) div = 16;
56+
else if (clock >= F_CPU / 17) div = 17;
57+
else if (clock >= F_CPU / 18) div = 18;
58+
else if (clock >= F_CPU / 19) div = 19;
59+
else if (clock >= F_CPU / 20) div = 20;
60+
else if (clock >= F_CPU / 21) div = 21;
61+
else if (clock >= F_CPU / 22) div = 22;
62+
else if (clock >= F_CPU / 23) div = 23;
63+
else if (clock >= F_CPU / 24) div = 24;
64+
else if (clock >= F_CPU / 25) div = 25;
65+
else if (clock >= F_CPU / 26) div = 26;
66+
else if (clock >= F_CPU / 27) div = 27;
67+
else if (clock >= F_CPU / 28) div = 28;
68+
else if (clock >= F_CPU / 29) div = 29;
69+
else if (clock >= F_CPU / 30) div = 30;
70+
else if (clock >= F_CPU / 31) div = 31;
71+
else if (clock >= F_CPU / 32) div = 32;
72+
else if (clock >= F_CPU / 33) div = 33;
73+
else if (clock >= F_CPU / 34) div = 34;
74+
else if (clock >= F_CPU / 35) div = 35;
75+
else if (clock >= F_CPU / 36) div = 36;
76+
else if (clock >= F_CPU / 37) div = 37;
77+
else if (clock >= F_CPU / 38) div = 38;
78+
else if (clock >= F_CPU / 39) div = 39;
79+
else if (clock >= F_CPU / 40) div = 40;
80+
else if (clock >= F_CPU / 41) div = 41;
81+
else if (clock >= F_CPU / 42) div = 42;
82+
else if (clock >= F_CPU / 43) div = 43;
83+
else if (clock >= F_CPU / 44) div = 44;
84+
else if (clock >= F_CPU / 45) div = 45;
85+
else if (clock >= F_CPU / 46) div = 46;
86+
else if (clock >= F_CPU / 47) div = 47;
87+
else if (clock >= F_CPU / 48) div = 48;
88+
else if (clock >= F_CPU / 49) div = 49;
89+
else if (clock >= F_CPU / 50) div = 50;
90+
else if (clock >= F_CPU / 51) div = 51;
91+
else if (clock >= F_CPU / 52) div = 52;
92+
else if (clock >= F_CPU / 53) div = 53;
93+
else if (clock >= F_CPU / 54) div = 54;
94+
else if (clock >= F_CPU / 55) div = 55;
95+
else if (clock >= F_CPU / 56) div = 56;
96+
else if (clock >= F_CPU / 57) div = 57;
97+
else if (clock >= F_CPU / 58) div = 58;
98+
else if (clock >= F_CPU / 59) div = 59;
99+
else if (clock >= F_CPU / 60) div = 60;
100+
else if (clock >= F_CPU / 61) div = 61;
101+
else if (clock >= F_CPU / 62) div = 62;
102+
else if (clock >= F_CPU / 63) div = 63;
103+
else if (clock >= F_CPU / 64) div = 64;
104+
else if (clock >= F_CPU / 65) div = 65;
105+
else if (clock >= F_CPU / 66) div = 66;
106+
else if (clock >= F_CPU / 67) div = 67;
107+
else if (clock >= F_CPU / 68) div = 68;
108+
else if (clock >= F_CPU / 69) div = 69;
109+
else if (clock >= F_CPU / 70) div = 70;
110+
else if (clock >= F_CPU / 71) div = 71;
111+
else if (clock >= F_CPU / 72) div = 72;
112+
else if (clock >= F_CPU / 73) div = 73;
113+
else if (clock >= F_CPU / 74) div = 74;
114+
else if (clock >= F_CPU / 75) div = 75;
115+
else if (clock >= F_CPU / 76) div = 76;
116+
else if (clock >= F_CPU / 77) div = 77;
117+
else if (clock >= F_CPU / 78) div = 78;
118+
else if (clock >= F_CPU / 79) div = 79;
119+
else if (clock >= F_CPU / 80) div = 80;
120+
else if (clock >= F_CPU / 81) div = 81;
121+
else if (clock >= F_CPU / 82) div = 82;
122+
else if (clock >= F_CPU / 83) div = 83;
123+
else if (clock >= F_CPU / 84) div = 84;
124+
else if (clock >= F_CPU / 85) div = 85;
125+
else if (clock >= F_CPU / 86) div = 86;
126+
else if (clock >= F_CPU / 87) div = 87;
127+
else if (clock >= F_CPU / 88) div = 88;
128+
else if (clock >= F_CPU / 89) div = 89;
129+
else if (clock >= F_CPU / 90) div = 90;
130+
else if (clock >= F_CPU / 91) div = 91;
131+
else if (clock >= F_CPU / 92) div = 92;
132+
else if (clock >= F_CPU / 93) div = 93;
133+
else if (clock >= F_CPU / 94) div = 94;
134+
else if (clock >= F_CPU / 95) div = 95;
135+
else if (clock >= F_CPU / 96) div = 96;
136+
else if (clock >= F_CPU / 97) div = 97;
137+
else if (clock >= F_CPU / 98) div = 98;
138+
else if (clock >= F_CPU / 99) div = 99;
139+
else if (clock >= F_CPU / 100) div = 100;
140+
else if (clock >= F_CPU / 101) div = 101;
141+
else if (clock >= F_CPU / 102) div = 102;
142+
else if (clock >= F_CPU / 103) div = 103;
143+
else if (clock >= F_CPU / 104) div = 104;
144+
else if (clock >= F_CPU / 105) div = 105;
145+
else if (clock >= F_CPU / 106) div = 106;
146+
else if (clock >= F_CPU / 107) div = 107;
147+
else if (clock >= F_CPU / 108) div = 108;
148+
else if (clock >= F_CPU / 109) div = 109;
149+
else if (clock >= F_CPU / 110) div = 110;
150+
else if (clock >= F_CPU / 111) div = 111;
151+
else if (clock >= F_CPU / 112) div = 112;
152+
else if (clock >= F_CPU / 113) div = 113;
153+
else if (clock >= F_CPU / 114) div = 114;
154+
else if (clock >= F_CPU / 115) div = 115;
155+
else if (clock >= F_CPU / 116) div = 116;
156+
else if (clock >= F_CPU / 117) div = 117;
157+
else if (clock >= F_CPU / 118) div = 118;
158+
else if (clock >= F_CPU / 119) div = 119;
159+
else if (clock >= F_CPU / 120) div = 120;
160+
else if (clock >= F_CPU / 121) div = 121;
161+
else if (clock >= F_CPU / 122) div = 122;
162+
else if (clock >= F_CPU / 123) div = 123;
163+
else if (clock >= F_CPU / 124) div = 124;
164+
else if (clock >= F_CPU / 125) div = 125;
165+
else if (clock >= F_CPU / 126) div = 126;
166+
else if (clock >= F_CPU / 127) div = 127;
167+
else if (clock >= F_CPU / 128) div = 128;
168+
else if (clock >= F_CPU / 129) div = 129;
169+
else if (clock >= F_CPU / 130) div = 130;
170+
else if (clock >= F_CPU / 131) div = 131;
171+
else if (clock >= F_CPU / 132) div = 132;
172+
else if (clock >= F_CPU / 133) div = 133;
173+
else if (clock >= F_CPU / 134) div = 134;
174+
else if (clock >= F_CPU / 135) div = 135;
175+
else if (clock >= F_CPU / 136) div = 136;
176+
else if (clock >= F_CPU / 137) div = 137;
177+
else if (clock >= F_CPU / 138) div = 138;
178+
else if (clock >= F_CPU / 139) div = 139;
179+
else if (clock >= F_CPU / 140) div = 140;
180+
else if (clock >= F_CPU / 141) div = 141;
181+
else if (clock >= F_CPU / 142) div = 142;
182+
else if (clock >= F_CPU / 143) div = 143;
183+
else if (clock >= F_CPU / 144) div = 144;
184+
else if (clock >= F_CPU / 145) div = 145;
185+
else if (clock >= F_CPU / 146) div = 146;
186+
else if (clock >= F_CPU / 147) div = 147;
187+
else if (clock >= F_CPU / 148) div = 148;
188+
else if (clock >= F_CPU / 149) div = 149;
189+
else if (clock >= F_CPU / 150) div = 150;
190+
else if (clock >= F_CPU / 151) div = 151;
191+
else if (clock >= F_CPU / 152) div = 152;
192+
else if (clock >= F_CPU / 153) div = 153;
193+
else if (clock >= F_CPU / 154) div = 154;
194+
else if (clock >= F_CPU / 155) div = 155;
195+
else if (clock >= F_CPU / 156) div = 156;
196+
else if (clock >= F_CPU / 157) div = 157;
197+
else if (clock >= F_CPU / 158) div = 158;
198+
else if (clock >= F_CPU / 159) div = 159;
199+
else if (clock >= F_CPU / 160) div = 160;
200+
else if (clock >= F_CPU / 161) div = 161;
201+
else if (clock >= F_CPU / 162) div = 162;
202+
else if (clock >= F_CPU / 163) div = 163;
203+
else if (clock >= F_CPU / 164) div = 164;
204+
else if (clock >= F_CPU / 165) div = 165;
205+
else if (clock >= F_CPU / 166) div = 166;
206+
else if (clock >= F_CPU / 167) div = 167;
207+
else if (clock >= F_CPU / 168) div = 168;
208+
else if (clock >= F_CPU / 169) div = 169;
209+
else if (clock >= F_CPU / 170) div = 170;
210+
else if (clock >= F_CPU / 171) div = 171;
211+
else if (clock >= F_CPU / 172) div = 172;
212+
else if (clock >= F_CPU / 173) div = 173;
213+
else if (clock >= F_CPU / 174) div = 174;
214+
else if (clock >= F_CPU / 175) div = 175;
215+
else if (clock >= F_CPU / 176) div = 176;
216+
else if (clock >= F_CPU / 177) div = 177;
217+
else if (clock >= F_CPU / 178) div = 178;
218+
else if (clock >= F_CPU / 179) div = 179;
219+
else if (clock >= F_CPU / 180) div = 180;
220+
else if (clock >= F_CPU / 181) div = 181;
221+
else if (clock >= F_CPU / 182) div = 182;
222+
else if (clock >= F_CPU / 183) div = 183;
223+
else if (clock >= F_CPU / 184) div = 184;
224+
else if (clock >= F_CPU / 185) div = 185;
225+
else if (clock >= F_CPU / 186) div = 186;
226+
else if (clock >= F_CPU / 187) div = 187;
227+
else if (clock >= F_CPU / 188) div = 188;
228+
else if (clock >= F_CPU / 189) div = 189;
229+
else if (clock >= F_CPU / 190) div = 190;
230+
else if (clock >= F_CPU / 191) div = 191;
231+
else if (clock >= F_CPU / 192) div = 192;
232+
else if (clock >= F_CPU / 193) div = 193;
233+
else if (clock >= F_CPU / 194) div = 194;
234+
else if (clock >= F_CPU / 195) div = 195;
235+
else if (clock >= F_CPU / 196) div = 196;
236+
else if (clock >= F_CPU / 197) div = 197;
237+
else if (clock >= F_CPU / 198) div = 198;
238+
else if (clock >= F_CPU / 199) div = 199;
239+
else if (clock >= F_CPU / 200) div = 200;
240+
else if (clock >= F_CPU / 201) div = 201;
241+
else if (clock >= F_CPU / 202) div = 202;
242+
else if (clock >= F_CPU / 203) div = 203;
243+
else if (clock >= F_CPU / 204) div = 204;
244+
else if (clock >= F_CPU / 205) div = 205;
245+
else if (clock >= F_CPU / 206) div = 206;
246+
else if (clock >= F_CPU / 207) div = 207;
247+
else if (clock >= F_CPU / 208) div = 208;
248+
else if (clock >= F_CPU / 209) div = 209;
249+
else if (clock >= F_CPU / 210) div = 210;
250+
else if (clock >= F_CPU / 211) div = 211;
251+
else if (clock >= F_CPU / 212) div = 212;
252+
else if (clock >= F_CPU / 213) div = 213;
253+
else if (clock >= F_CPU / 214) div = 214;
254+
else if (clock >= F_CPU / 215) div = 215;
255+
else if (clock >= F_CPU / 216) div = 216;
256+
else if (clock >= F_CPU / 217) div = 217;
257+
else if (clock >= F_CPU / 218) div = 218;
258+
else if (clock >= F_CPU / 219) div = 219;
259+
else if (clock >= F_CPU / 220) div = 220;
260+
else if (clock >= F_CPU / 221) div = 221;
261+
else if (clock >= F_CPU / 222) div = 222;
262+
else if (clock >= F_CPU / 223) div = 223;
263+
else if (clock >= F_CPU / 224) div = 224;
264+
else if (clock >= F_CPU / 225) div = 225;
265+
else if (clock >= F_CPU / 226) div = 226;
266+
else if (clock >= F_CPU / 227) div = 227;
267+
else if (clock >= F_CPU / 228) div = 228;
268+
else if (clock >= F_CPU / 229) div = 229;
269+
else if (clock >= F_CPU / 230) div = 230;
270+
else if (clock >= F_CPU / 231) div = 231;
271+
else if (clock >= F_CPU / 232) div = 232;
272+
else if (clock >= F_CPU / 233) div = 233;
273+
else if (clock >= F_CPU / 234) div = 234;
274+
else if (clock >= F_CPU / 235) div = 235;
275+
else if (clock >= F_CPU / 236) div = 236;
276+
else if (clock >= F_CPU / 237) div = 237;
277+
else if (clock >= F_CPU / 238) div = 238;
278+
else if (clock >= F_CPU / 239) div = 239;
279+
else if (clock >= F_CPU / 240) div = 240;
280+
else if (clock >= F_CPU / 241) div = 241;
281+
else if (clock >= F_CPU / 242) div = 242;
282+
else if (clock >= F_CPU / 243) div = 243;
283+
else if (clock >= F_CPU / 244) div = 244;
284+
else if (clock >= F_CPU / 245) div = 245;
285+
else if (clock >= F_CPU / 246) div = 246;
286+
else if (clock >= F_CPU / 247) div = 247;
287+
else if (clock >= F_CPU / 248) div = 248;
288+
else if (clock >= F_CPU / 249) div = 249;
289+
else if (clock >= F_CPU / 250) div = 250;
290+
else if (clock >= F_CPU / 251) div = 251;
291+
else if (clock >= F_CPU / 252) div = 252;
292+
else if (clock >= F_CPU / 253) div = 253;
293+
else if (clock >= F_CPU / 254) div = 254;
294+
else /* clock >= F_CPU / 255 */ div = 255;
295+
/*
296+
#! /usr/bin/perl
297+
for ($i=2; $i<256; $i++) {
298+
printf "\t\t\telse if (clock >= F_CPU / %3d) div = %3d;\n", $i, $i;
299+
}
300+
*/
301+
} else {
302+
for (div=2; div<255; div++) {
303+
if (clock >= F_CPU / div) break;
304+
}
305+
}
306+
this->clockDiv = div;
307+
this->dataMode = dataMode;
308+
this->bitOrder = bitOrder;
309+
}
310+
uint8_t clockDiv, dataMode;
311+
BitOrder bitOrder;
312+
friend class SPIClass;
313+
314+
};
315+
21316
class SPIClass {
22317
public:
23318
SPIClass(SERCOM *p_sercom, uint8_t uc_pinMISO, uint8_t uc_pinSCK, uint8_t uc_pinMOSI);
24319

25320
byte transfer(uint8_t data);
26321

322+
// Transaction Functions
323+
void usingInterrupt(uint8_t interruptNumber);
324+
void beginTransaction(SPISettings settings);
325+
void endTransaction(void);
326+
27327
// SPI Configuration methods
28328
void attachInterrupt();
29329
void detachInterrupt();

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