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
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
|
/*
* The MIT License (MIT)
*
* Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
* Copyright (c) 2021, Ha Thach (tinyusb.org)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* This file is part of the TinyUSB stack.
*/
#include "pico/stdlib.h"
#include "pico/binary_info.h"
#include "hardware/gpio.h"
#include "hardware/sync.h"
#include "hardware/structs/ioqspi.h"
#include "hardware/structs/sio.h"
#include "bsp/board.h"
#include "board.h"
#ifdef BUTTON_BOOTSEL
// This example blinks the Picoboard LED when the BOOTSEL button is pressed.
//
// Picoboard has a button attached to the flash CS pin, which the bootrom
// checks, and jumps straight to the USB bootcode if the button is pressed
// (pulling flash CS low). We can check this pin in by jumping to some code in
// SRAM (so that the XIP interface is not required), floating the flash CS
// pin, and observing whether it is pulled low.
//
// This doesn't work if others are trying to access flash at the same time,
// e.g. XIP streamer, or the other core.
bool __no_inline_not_in_flash_func(get_bootsel_button)() {
const uint CS_PIN_INDEX = 1;
// Must disable interrupts, as interrupt handlers may be in flash, and we
// are about to temporarily disable flash access!
uint32_t flags = save_and_disable_interrupts();
// Set chip select to Hi-Z
hw_write_masked(&ioqspi_hw->io[CS_PIN_INDEX].ctrl,
GPIO_OVERRIDE_LOW << IO_QSPI_GPIO_QSPI_SS_CTRL_OEOVER_LSB,
IO_QSPI_GPIO_QSPI_SS_CTRL_OEOVER_BITS);
// Note we can't call into any sleep functions in flash right now
for (volatile int i = 0; i < 1000; ++i);
// The HI GPIO registers in SIO can observe and control the 6 QSPI pins.
// Note the button pulls the pin *low* when pressed.
bool button_state = (sio_hw->gpio_hi_in & (1u << CS_PIN_INDEX));
// Need to restore the state of chip select, else we are going to have a
// bad time when we return to code in flash!
hw_write_masked(&ioqspi_hw->io[CS_PIN_INDEX].ctrl,
GPIO_OVERRIDE_NORMAL << IO_QSPI_GPIO_QSPI_SS_CTRL_OEOVER_LSB,
IO_QSPI_GPIO_QSPI_SS_CTRL_OEOVER_BITS);
restore_interrupts(flags);
return button_state;
}
#endif
//------------- Segger RTT retarget -------------//
#if defined(LOGGER_RTT)
// Logging with RTT
// - If RTT Control Block is not found by 'Auto Detection` try to use 'Search Range` with '0x20000000 0x10000'
// - SWD speed is rather slow around 1000Khz
#include "pico/stdio/driver.h"
#include "SEGGER_RTT.h"
static void stdio_rtt_write (const char *buf, int length)
{
SEGGER_RTT_Write(0, buf, length);
}
static int stdio_rtt_read (char *buf, int len)
{
return SEGGER_RTT_Read(0, buf, len);
}
static stdio_driver_t stdio_rtt =
{
.out_chars = stdio_rtt_write,
.out_flush = NULL,
.in_chars = stdio_rtt_read
};
void stdio_rtt_init(void)
{
stdio_set_driver_enabled(&stdio_rtt, true);
}
#endif
#ifdef UART_DEV
static uart_inst_t *uart_inst;
#endif
void board_init(void)
{
#ifdef LED_PIN
bi_decl(bi_1pin_with_name(LED_PIN, "LED"));
gpio_init(LED_PIN);
gpio_set_dir(LED_PIN, GPIO_OUT);
#endif
// Button
#ifndef BUTTON_BOOTSEL
#endif
#if defined(UART_DEV) && defined(LIB_PICO_STDIO_UART)
bi_decl(bi_2pins_with_func(UART_TX_PIN, UART_TX_PIN, GPIO_FUNC_UART));
uart_inst = uart_get_instance(UART_DEV);
stdio_uart_init_full(uart_inst, CFG_BOARD_UART_BAUDRATE, UART_TX_PIN, UART_RX_PIN);
#endif
#if defined(LOGGER_RTT)
stdio_rtt_init();
#endif
// todo probably set up device mode?
#if TUSB_OPT_DEVICE_ENABLED
#endif
#if TUSB_OPT_HOST_ENABLED
// set portfunc to host !!!
#endif
}
//--------------------------------------------------------------------+
// Board porting API
//--------------------------------------------------------------------+
void board_led_write(bool state)
{
#ifdef LED_PIN
gpio_put(LED_PIN, state ? LED_STATE_ON : (1-LED_STATE_ON));
#endif
}
uint32_t board_button_read(void)
{
#ifdef BUTTON_BOOTSEL
return BUTTON_STATE_ACTIVE == get_bootsel_button();
#else
return 0;
#endif
}
int board_uart_read(uint8_t* buf, int len)
{
#ifdef UART_DEV
for(int i=0;i<len;i++) {
buf[i] = uart_getc(uart_inst);
}
return len;
#else
return 0;
#endif
}
int board_uart_write(void const * buf, int len)
{
#ifdef UART_DEV
char const* bufch = (char const*) buf;
for(int i=0;i<len;i++) {
uart_putc(uart_inst, bufch[i]);
}
return len;
#else
return 0;
#endif
}
//--------------------------------------------------------------------+
// USB Interrupt Handler
// rp2040 implementation will install approriate handler when initializing
// tinyusb. There is no need to forward IRQ from application
//--------------------------------------------------------------------+
|
