Ich habe ein besonderes Problem mit STM32F303 DMA.
Ich verwende libopencm3, aber ich hoffe, Sie werden deutlich sehen, was passiert - es sind alles nur Funktionen zum Setzen der Steuerregister.
Ich sende Daten von einem konstanten Array an einen DAC - aber er sendet die Daten falsch.
(Hinweis: Ich habe den Inhalt der Sinustabelle zum Debuggen durch eine Skala von 0-4095 ersetzt.)
const uint16_t sine_table[SINE_TABLE_LEN] = {
0, 16, 32, 48, 64, 80, 96, 112, 128, 144, 160, 176, 192, 208, 224, 240, 256, 272, 288, 304, 320, 336, 352, 368, 384, 400, 416, 432, 448, 464, 480, 496, 512, 528, 544, 560, 576, 592, 608, 624, 640, 656, 672, 688, 704, 720, 736, 752, 768, 784, 800, 816, 832, 848, 864, 880, 896, 912, 928, 944, 960, 976, 992, 1008, 1024, 1040, 1056, 1072, 1088, 1104, 1120, 1136, 1152, 1168, 1184, 1200, 1216, 1232, 1248, 1264, 1280, 1296, 1312, 1328, 1344, 1360, 1376, 1392, 1408, 1424, 1440, 1456, 1472, 1488, 1504, 1520, 1536, 1552, 1568, 1584, 1600, 1616, 1632, 1648, 1664, 1680, 1696, 1712, 1728, 1744, 1760, 1776, 1792, 1808, 1824, 1840, 1856, 1872, 1888, 1904, 1920, 1936, 1952, 1968, 1984, 2000, 2016, 2032, 2048, 2063, 2079, 2095, 2111, 2127, 2143, 2159, 2175, 2191, 2207, 2223, 2239, 2255, 2271, 2287, 2303, 2319, 2335, 2351, 2367, 2383, 2399, 2415, 2431, 2447, 2463, 2479, 2495, 2511, 2527, 2543, 2559, 2575, 2591, 2607, 2623, 2639, 2655, 2671, 2687, 2703, 2719, 2735, 2751, 2767, 2783, 2799, 2815, 2831, 2847, 2863, 2879, 2895, 2911, 2927, 2943, 2959, 2975, 2991, 3007, 3023, 3039, 3055, 3071, 3087, 3103, 3119, 3135, 3151, 3167, 3183, 3199, 3215, 3231, 3247, 3263, 3279, 3295, 3311, 3327, 3343, 3359, 3375, 3391, 3407, 3423, 3439, 3455, 3471, 3487, 3503, 3519, 3535, 3551, 3567, 3583, 3599, 3615, 3631, 3647, 3663, 3679, 3695, 3711, 3727, 3743, 3759, 3775, 3791, 3807, 3823, 3839, 3855, 3871, 3887, 3903, 3919, 3935, 3951, 3967, 3983, 3999, 4015, 4031, 4047, 4063, 4079
};
void send_dac_sine()
{
const uint32_t dma = DMA2;
const uint32_t ch = DMA_CHANNEL3;
dac_set_waveform_generation(DAC_CR_WAVE1_DIS);
dac_dma_disable(CHANNEL_1);
dma_disable_channel(dma, ch);
dma_channel_reset(dma, ch);
dma_enable_circular_mode(dma, ch);
dma_set_peripheral_address(dma, ch, (uint32_t) &DAC_DHR12R1);
dma_set_memory_address(dma, ch, (uint32_t) &sine_table);
dma_set_memory_size(dma, ch, DMA_CCR_MSIZE_16BIT);
dma_set_peripheral_size(dma, ch, DMA_CCR_MSIZE_16BIT);
dma_set_read_from_memory(dma, ch);
dma_set_number_of_data(dma, ch, SINE_TABLE_LEN);
dma_set_priority(dma, ch, DMA_CCR_PL_VERY_HIGH);
dma_enable_memory_increment_mode(dma, ch);
dma_disable_peripheral_increment_mode(dma, ch);
dac_dma_enable(CHANNEL_1);
dma_enable_channel(dma, ch);
}
Zuerst habe ich versucht, den Ausgang mit einem ADC zu messen, aber dann wurde mir klar, dass ich das DAC-Eingangsregister lesen und DAS über UART senden kann.
Es sendet 8x die ersten 16 Nummern, dann 8x die letzten 16 Nummern.
Ich habe es geschafft, mehr oder weniger zu erfassen, was vor sich geht (einige Register und DAC-Ausgabe (erste Spalte) über USART ausgeben:
Starting sine DMA
DMA started...
20, DAC = 0 CNTDR 255
30, DAC = 16 CNTDR 254
20, DAC = 32 CNTDR 253
56, DAC = 48 CNTDR 252
33, DAC = 64 CNTDR 251
35, DAC = 80 CNTDR 250
35, DAC = 96 CNTDR 249
58, DAC = 112 CNTDR 248
45, DAC = 128 CNTDR 247
63, DAC = 144 CNTDR 246
83, DAC = 160 CNTDR 245
133, DAC = 176 CNTDR 244
123, DAC = 192 CNTDR 243
129, DAC = 208 CNTDR 242
146, DAC = 224 CNTDR 241
160, DAC = 240 CNTDR 240
183, DAC = 0 CNTDR 239
16, DAC = 16 CNTDR 238
30, DAC = 32 CNTDR 237
51, DAC = 48 CNTDR 236
49, DAC = 64 CNTDR 235
26, DAC = 80 CNTDR 234
29, DAC = 96 CNTDR 233
40, DAC = 112 CNTDR 232
61, DAC = 128 CNTDR 231
100, DAC = 144 CNTDR 230
99, DAC = 160 CNTDR 229
96, DAC = 176 CNTDR 228
139, DAC = 192 CNTDR 227
131, DAC = 208 CNTDR 226
150, DAC = 224 CNTDR 225
203, DAC = 240 CNTDR 224
177, DAC = 0 CNTDR 223
20, DAC = 16 CNTDR 222
23, DAC = 32 CNTDR 221
20, DAC = 48 CNTDR 220
33, DAC = 64 CNTDR 219
28, DAC = 80 CNTDR 218
67, DAC = 96 CNTDR 217
40, DAC = 112 CNTDR 216
46, DAC = 128 CNTDR 215
77, DAC = 144 CNTDR 214
91, DAC = 160 CNTDR 213
96, DAC = 176 CNTDR 212
113, DAC = 192 CNTDR 211
134, DAC = 208 CNTDR 210
158, DAC = 224 CNTDR 209
164, DAC = 240 CNTDR 208
176, DAC = 0 CNTDR 207
20, DAC = 16 CNTDR 206
21, DAC = 32 CNTDR 205
56, DAC = 48 CNTDR 204
29, DAC = 64 CNTDR 203
66, DAC = 80 CNTDR 202
63, DAC = 96 CNTDR 201
49, DAC = 112 CNTDR 200
55, DAC = 128 CNTDR 199
68, DAC = 144 CNTDR 198
79, DAC = 160 CNTDR 197
99, DAC = 176 CNTDR 196
115, DAC = 192 CNTDR 195
168, DAC = 208 CNTDR 194
164, DAC = 224 CNTDR 193
166, DAC = 240 CNTDR 192
206, DAC = 0 CNTDR 191
24, DAC = 16 CNTDR 190
66, DAC = 32 CNTDR 189
59, DAC = 48 CNTDR 188
47, DAC = 64 CNTDR 187
39, DAC = 80 CNTDR 186
29, DAC = 96 CNTDR 185
37, DAC = 112 CNTDR 184
61, DAC = 128 CNTDR 183
66, DAC = 144 CNTDR 182
84, DAC = 160 CNTDR 181
101, DAC = 176 CNTDR 180
152, DAC = 192 CNTDR 179
133, DAC = 208 CNTDR 178
182, DAC = 224 CNTDR 177
165, DAC = 240 CNTDR 176
185, DAC = 0 CNTDR 175
33, DAC = 16 CNTDR 174
27, DAC = 32 CNTDR 173
25, DAC = 48 CNTDR 172
24, DAC = 64 CNTDR 171
41, DAC = 80 CNTDR 170
64, DAC = 96 CNTDR 169
55, DAC = 112 CNTDR 168
47, DAC = 128 CNTDR 167
66, DAC = 144 CNTDR 166
83, DAC = 160 CNTDR 165
121, DAC = 176 CNTDR 164
115, DAC = 192 CNTDR 163
154, DAC = 208 CNTDR 162
185, DAC = 224 CNTDR 161
187, DAC = 240 CNTDR 160
187, DAC = 0 CNTDR 159
55, DAC = 16 CNTDR 158
58, DAC = 32 CNTDR 157
24, DAC = 48 CNTDR 156
25, DAC = 64 CNTDR 155
35, DAC = 80 CNTDR 154
33, DAC = 96 CNTDR 153
49, DAC = 112 CNTDR 152
53, DAC = 128 CNTDR 151
87, DAC = 144 CNTDR 150
79, DAC = 160 CNTDR 149
103, DAC = 176 CNTDR 148
121, DAC = 192 CNTDR 147
133, DAC = 208 CNTDR 146
163, DAC = 224 CNTDR 145
168, DAC = 240 CNTDR 144
194, DAC = 0 CNTDR 143
34, DAC = 16 CNTDR 142
34, DAC = 32 CNTDR 141
18, DAC = 48 CNTDR 140
27, DAC = 64 CNTDR 139
48, DAC = 80 CNTDR 138
68, DAC = 96 CNTDR 137
80, DAC = 112 CNTDR 136
46, DAC = 128 CNTDR 135
63, DAC = 144 CNTDR 134
82, DAC = 160 CNTDR 133
101, DAC = 176 CNTDR 132
144, DAC = 192 CNTDR 131
166, DAC = 208 CNTDR 130
149, DAC = 224 CNTDR 129
189, DAC = 240 CNTDR 128
207, DAC = 0 CNTDR 127
23, DAC = 3855 CNTDR 126
3527, DAC = 3871 CNTDR 125
3531, DAC = 3887 CNTDR 124
3523, DAC = 3903 CNTDR 123
3550, DAC = 3919 CNTDR 122
3524, DAC = 3935 CNTDR 121
3522, DAC = 3951 CNTDR 120
3537, DAC = 3967 CNTDR 119
3525, DAC = 3983 CNTDR 118
3521, DAC = 3999 CNTDR 117
3526, DAC = 4015 CNTDR 116
3528, DAC = 4031 CNTDR 115
3523, DAC = 4047 CNTDR 114
3522, DAC = 4063 CNTDR 113
3525, DAC = 4079 CNTDR 112
3526, DAC = 4095 CNTDR 111
32, DAC = 3855 CNTDR 110
3517, DAC = 3871 CNTDR 109
3525, DAC = 3887 CNTDR 108
3527, DAC = 3903 CNTDR 107
3523, DAC = 3919 CNTDR 106
3553, DAC = 3935 CNTDR 105
3523, DAC = 3951 CNTDR 104
3522, DAC = 3967 CNTDR 103
3524, DAC = 3983 CNTDR 102
3524, DAC = 3999 CNTDR 101
3541, DAC = 4015 CNTDR 100
3520, DAC = 4031 CNTDR 99
3519, DAC = 4047 CNTDR 98
3521, DAC = 4063 CNTDR 97
3539, DAC = 4079 CNTDR 96
3517, DAC = 4095 CNTDR 95
43, DAC = 3855 CNTDR 94
3547, DAC = 3871 CNTDR 93
3519, DAC = 3887 CNTDR 92
3518, DAC = 3903 CNTDR 91
3519, DAC = 3919 CNTDR 90
3521, DAC = 3935 CNTDR 89
3530, DAC = 3951 CNTDR 88
3541, DAC = 3967 CNTDR 87
3519, DAC = 3983 CNTDR 86
3538, DAC = 3999 CNTDR 85
3538, DAC = 4015 CNTDR 84
3520, DAC = 4031 CNTDR 83
3535, DAC = 4047 CNTDR 82
3521, DAC = 4063 CNTDR 81
3523, DAC = 4079 CNTDR 80
3517, DAC = 4095 CNTDR 79
21, DAC = 3855 CNTDR 78
3542, DAC = 3871 CNTDR 77
3523, DAC = 3887 CNTDR 76
3524, DAC = 3903 CNTDR 75
3517, DAC = 3919 CNTDR 74
3517, DAC = 3935 CNTDR 73
3527, DAC = 3951 CNTDR 72
3526, DAC = 3967 CNTDR 71
3523, DAC = 3983 CNTDR 70
3523, DAC = 3999 CNTDR 69
3529, DAC = 4015 CNTDR 68
3551, DAC = 4031 CNTDR 67
3525, DAC = 4047 CNTDR 66
3542, DAC = 4063 CNTDR 65
3545, DAC = 4079 CNTDR 64
3522, DAC = 4095 CNTDR 63
39, DAC = 3855 CNTDR 62
3519, DAC = 3871 CNTDR 61
3524, DAC = 3887 CNTDR 60
3536, DAC = 3903 CNTDR 59
3529, DAC = 3919 CNTDR 58
3521, DAC = 3935 CNTDR 57
3520, DAC = 3951 CNTDR 56
3515, DAC = 3967 CNTDR 55
3522, DAC = 3983 CNTDR 54
3522, DAC = 3999 CNTDR 53
3522, DAC = 4015 CNTDR 52
3524, DAC = 4031 CNTDR 51
3519, DAC = 4047 CNTDR 50
3523, DAC = 4063 CNTDR 49
3531, DAC = 4079 CNTDR 48
3513, DAC = 4095 CNTDR 47
29, DAC = 3855 CNTDR 46
3518, DAC = 3871 CNTDR 45
3548, DAC = 3887 CNTDR 44
3526, DAC = 3903 CNTDR 43
3523, DAC = 3919 CNTDR 42
3547, DAC = 3935 CNTDR 41
3542, DAC = 3951 CNTDR 40
3538, DAC = 3967 CNTDR 39
3515, DAC = 3983 CNTDR 38
3528, DAC = 3999 CNTDR 37
3522, DAC = 4015 CNTDR 36
3518, DAC = 4031 CNTDR 35
3519, DAC = 4047 CNTDR 34
3519, DAC = 4063 CNTDR 33
3521, DAC = 4079 CNTDR 32
3519, DAC = 4095 CNTDR 31
41, DAC = 3855 CNTDR 30
3528, DAC = 3871 CNTDR 29
3535, DAC = 3887 CNTDR 28
3533, DAC = 3903 CNTDR 27
3525, DAC = 3919 CNTDR 26
3546, DAC = 3935 CNTDR 25
3523, DAC = 3951 CNTDR 24
3522, DAC = 3967 CNTDR 23
3548, DAC = 3983 CNTDR 22
3522, DAC = 3999 CNTDR 21
3549, DAC = 4015 CNTDR 20
3522, DAC = 4031 CNTDR 19
3519, DAC = 4047 CNTDR 18
3523, DAC = 4063 CNTDR 17
3554, DAC = 4079 CNTDR 16
3539, DAC = 4095 CNTDR 15
14, DAC = 3855 CNTDR 14
3519, DAC = 3871 CNTDR 13
3523, DAC = 3887 CNTDR 12
3523, DAC = 3903 CNTDR 11
3527, DAC = 3919 CNTDR 10
3532, DAC = 3935 CNTDR 9
3518, DAC = 3951 CNTDR 8
3545, DAC = 3967 CNTDR 7
3540, DAC = 3983 CNTDR 6
3525, DAC = 3999 CNTDR 5
3523, DAC = 4015 CNTDR 4
3518, DAC = 4031 CNTDR 3
3541, DAC = 4047 CNTDR 2
3551, DAC = 4063 CNTDR 1
3537, DAC = 4079 CNTDR 256
3521, DAC = 0 CNTDR 255 // Continues periodically...
Kann das an irgendeiner Fehlkonfiguration liegen? Oder ist es vielleicht ein Hardwarefehler? (das bezweifle ich aber...)
Problem war
dma_set_memory_size(dma, ch, DMA_CCR_MSIZE_16BIT);
dma_set_peripheral_size(dma, ch, DMA_CCR_MSIZE_16BIT);
gewesen sein sollte
dma_set_memory_size(dma, ch, DMA_CCR_MSIZE_16BIT);
dma_set_peripheral_size(dma, ch, DMA_CCR_PSIZE_16BIT); // note the P