1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
|
/*
* Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <stdio.h>
#include "pico/stdlib.h"
#include "pico/time.h"
#include "hardware/dma.h"
#include "pico/bit_ops.h"
#include "hardware/i2c.h"
#include "hardware/pwm.h"
#include "hardware/pio.h"
#include "hardware/irq.h"
#include "hardware/timer.h"
#include "pico/divider.h"
#include "pico/critical_section.h"
#include "pico/binary_info.h"
bi_decl(bi_block_device(
BINARY_INFO_MAKE_TAG('K', 'S'),
"foo",
0x80000,
0x40000,
NULL,
BINARY_INFO_BLOCK_DEV_FLAG_READ | BINARY_INFO_BLOCK_DEV_FLAG_WRITE |
BINARY_INFO_BLOCK_DEV_FLAG_PT_UNKNOWN));
void my_timer(uint i) {
puts("XXXX timer");
}
//#pragma GCC push_options
//#pragma GCC optimize ("O3")
uint32_t *foo = (uint32_t *) 200;
uint32_t dma_to = 0;
uint32_t dma_from = 0xaaaa5555;
void spiggle() {
dma_channel_config c = dma_channel_get_default_config(1);
channel_config_set_bswap(&c, true);
channel_config_set_transfer_data_size(&c, DMA_SIZE_16);
channel_config_set_ring(&c, true, 13);
dma_channel_set_config(1, &c, false);
dma_channel_transfer_from_buffer_now(1, foo, 23);
}
void __isr dma_handler_a() {
printf("HELLO A\n");
if (dma_hw->ints1 & 1) {
dma_hw->ints1 = 1;
printf("A WINS DMA_TO %08x\n", (uint) dma_to);
irq_remove_handler(DMA_IRQ_1, dma_handler_a);
}
}
void __isr dma_handler_b() {
printf("HELLO B\n");
if (dma_hw->ints1 & 1) {
dma_hw->ints1 = 1;
printf("B WINS DNA_TO %08x\n", (uint) dma_to);
// irq_remove_handler(DMA_IRQ_1, dma_handler_b);
}
}
//#pragma GCC pop_options
int main() {
spiggle();
stdio_init_all();
printf("HI %d\n", (int)time_us_32());
puts("Hello Everything!");
puts("Hello Everything2!");
irq_add_shared_handler(DMA_IRQ_1, dma_handler_a, 0x80);
irq_add_shared_handler(DMA_IRQ_1, dma_handler_b, 0xC0);
dma_channel_config config = dma_channel_get_default_config(0);
// set_exclusive_irq_handler(DMA_IRQ_1, dma_handler_a);
dma_channel_set_irq1_enabled(0, true);
irq_set_enabled(DMA_IRQ_1, true);
dma_channel_configure(0, &config, &dma_to, &dma_from, 1, true);
dma_channel_set_config(0, &config, false);
// timer_start_ms(2, 2000, my_timer);
for (int i = 0; i < 20; i++) {
puts("sleepy");
sleep_ms(1000);
dma_channel_configure(0, &config, &dma_to, &dma_from, 1, true);
if (i==3) {
irq_remove_handler(DMA_IRQ_1, dma_handler_a);
}
if (i==2) {
irq_remove_handler(DMA_IRQ_1, dma_handler_b);
}
}
}
|
