103 lines
2.8 KiB
C
103 lines
2.8 KiB
C
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/*
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* Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <stdio.h>
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#include "pico/stdlib.h"
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#include "pico/time.h"
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#include "hardware/dma.h"
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#include "pico/bit_ops.h"
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#include "hardware/i2c.h"
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#include "hardware/pwm.h"
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#include "hardware/pio.h"
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#include "hardware/irq.h"
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#include "hardware/timer.h"
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#include "pico/divider.h"
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#include "pico/critical_section.h"
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#include "pico/binary_info.h"
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bi_decl(bi_block_device(
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BINARY_INFO_MAKE_TAG('K', 'S'),
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"foo",
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0x80000,
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0x40000,
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NULL,
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BINARY_INFO_BLOCK_DEV_FLAG_READ | BINARY_INFO_BLOCK_DEV_FLAG_WRITE |
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BINARY_INFO_BLOCK_DEV_FLAG_PT_UNKNOWN));
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void my_timer(uint i) {
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puts("XXXX timer");
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}
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//#pragma GCC push_options
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//#pragma GCC optimize ("O3")
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uint32_t *foo = (uint32_t *) 200;
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uint32_t dma_to = 0;
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uint32_t dma_from = 0xaaaa5555;
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void spiggle() {
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dma_channel_config c = dma_channel_get_default_config(1);
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channel_config_set_bswap(&c, true);
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channel_config_set_transfer_data_size(&c, DMA_SIZE_16);
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channel_config_set_ring(&c, true, 13);
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dma_channel_set_config(1, &c, false);
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dma_channel_transfer_from_buffer_now(1, foo, 23);
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}
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void __isr dma_handler_a() {
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printf("HELLO A\n");
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if (dma_hw->ints1 & 1) {
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dma_hw->ints1 = 1;
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printf("A WINS DMA_TO %08x\n", (uint) dma_to);
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irq_remove_handler(DMA_IRQ_1, dma_handler_a);
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}
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}
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void __isr dma_handler_b() {
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printf("HELLO B\n");
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if (dma_hw->ints1 & 1) {
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dma_hw->ints1 = 1;
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printf("B WINS DNA_TO %08x\n", (uint) dma_to);
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// irq_remove_handler(DMA_IRQ_1, dma_handler_b);
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}
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}
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//#pragma GCC pop_options
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int main() {
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spiggle();
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stdio_init_all();
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printf("HI %d\n", (int)time_us_32());
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puts("Hello Everything!");
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puts("Hello Everything2!");
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irq_add_shared_handler(DMA_IRQ_1, dma_handler_a, 0x80);
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irq_add_shared_handler(DMA_IRQ_1, dma_handler_b, 0xC0);
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dma_channel_config config = dma_channel_get_default_config(0);
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// set_exclusive_irq_handler(DMA_IRQ_1, dma_handler_a);
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dma_channel_set_irq1_enabled(0, true);
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irq_set_enabled(DMA_IRQ_1, true);
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dma_channel_configure(0, &config, &dma_to, &dma_from, 1, true);
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dma_channel_set_config(0, &config, false);
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// timer_start_ms(2, 2000, my_timer);
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for (int i = 0; i < 20; i++) {
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puts("sleepy");
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sleep_ms(1000);
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dma_channel_configure(0, &config, &dma_to, &dma_from, 1, true);
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if (i==3) {
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irq_remove_handler(DMA_IRQ_1, dma_handler_a);
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}
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if (i==2) {
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irq_remove_handler(DMA_IRQ_1, dma_handler_b);
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}
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}
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}
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