232 lines
6.7 KiB
C
232 lines
6.7 KiB
C
/*
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* The MIT License (MIT)
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*
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* Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
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* Copyright (c) 2021, Ha Thach (tinyusb.org)
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* This file is part of the TinyUSB stack.
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*/
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#include "pico/stdlib.h"
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#include "pico/binary_info.h"
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#include "hardware/gpio.h"
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#include "hardware/sync.h"
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#include "hardware/structs/ioqspi.h"
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#include "hardware/structs/sio.h"
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#include "bsp/board.h"
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#include "board.h"
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#if CFG_TUH_RPI_PIO_USB || CFG_TUD_RPI_PIO_USB
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#include "pio_usb.h"
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#endif
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#ifdef BUTTON_BOOTSEL
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// This example blinks the Picoboard LED when the BOOTSEL button is pressed.
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//
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// Picoboard has a button attached to the flash CS pin, which the bootrom
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// checks, and jumps straight to the USB bootcode if the button is pressed
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// (pulling flash CS low). We can check this pin in by jumping to some code in
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// SRAM (so that the XIP interface is not required), floating the flash CS
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// pin, and observing whether it is pulled low.
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//
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// This doesn't work if others are trying to access flash at the same time,
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// e.g. XIP streamer, or the other core.
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bool __no_inline_not_in_flash_func(get_bootsel_button)(void) {
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const uint CS_PIN_INDEX = 1;
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// Must disable interrupts, as interrupt handlers may be in flash, and we
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// are about to temporarily disable flash access!
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uint32_t flags = save_and_disable_interrupts();
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// Set chip select to Hi-Z
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hw_write_masked(&ioqspi_hw->io[CS_PIN_INDEX].ctrl,
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GPIO_OVERRIDE_LOW << IO_QSPI_GPIO_QSPI_SS_CTRL_OEOVER_LSB,
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IO_QSPI_GPIO_QSPI_SS_CTRL_OEOVER_BITS);
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// Note we can't call into any sleep functions in flash right now
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for (volatile int i = 0; i < 1000; ++i);
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// The HI GPIO registers in SIO can observe and control the 6 QSPI pins.
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// Note the button pulls the pin *low* when pressed.
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bool button_state = (sio_hw->gpio_hi_in & (1u << CS_PIN_INDEX));
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// Need to restore the state of chip select, else we are going to have a
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// bad time when we return to code in flash!
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hw_write_masked(&ioqspi_hw->io[CS_PIN_INDEX].ctrl,
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GPIO_OVERRIDE_NORMAL << IO_QSPI_GPIO_QSPI_SS_CTRL_OEOVER_LSB,
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IO_QSPI_GPIO_QSPI_SS_CTRL_OEOVER_BITS);
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restore_interrupts(flags);
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return button_state;
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}
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#endif
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//------------- Segger RTT retarget -------------//
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#if defined(LOGGER_RTT)
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// Logging with RTT
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// - If RTT Control Block is not found by 'Auto Detection` try to use 'Search Range` with '0x20000000 0x10000'
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// - SWD speed is rather slow around 1000Khz
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#include "pico/stdio/driver.h"
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#include "SEGGER_RTT.h"
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static void stdio_rtt_write (const char *buf, int length)
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{
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SEGGER_RTT_Write(0, buf, (unsigned) length);
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}
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static int stdio_rtt_read (char *buf, int len)
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{
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return (int) SEGGER_RTT_Read(0, buf, (unsigned) len);
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}
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static stdio_driver_t stdio_rtt =
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{
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.out_chars = stdio_rtt_write,
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.out_flush = NULL,
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.in_chars = stdio_rtt_read
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};
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void stdio_rtt_init(void)
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{
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stdio_set_driver_enabled(&stdio_rtt, true);
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}
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#endif
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#ifdef UART_DEV
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static uart_inst_t *uart_inst;
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#endif
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void board_init(void)
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{
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#if CFG_TUH_RPI_PIO_USB || CFG_TUD_RPI_PIO_USB
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// Set the system clock to a multiple of 120mhz for bitbanging USB with pico-usb
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set_sys_clock_khz(120000, true);
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#ifdef PICO_DEFAULT_PIO_USB_VBUSEN_PIN
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gpio_init(PICO_DEFAULT_PIO_USB_VBUSEN_PIN);
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gpio_set_dir(PICO_DEFAULT_PIO_USB_VBUSEN_PIN, GPIO_OUT);
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gpio_put(PICO_DEFAULT_PIO_USB_VBUSEN_PIN, PICO_DEFAULT_PIO_USB_VBUSEN_STATE);
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#endif
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// rp2040 use pico-pio-usb for host tuh_configure() can be used to passed pio configuration to the host stack
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// Note: tuh_configure() must be called before tuh_init()
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pio_usb_configuration_t pio_cfg = PIO_USB_DEFAULT_CONFIG;
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pio_cfg.pin_dp = PICO_DEFAULT_PIO_USB_DP_PIN;
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tuh_configure(BOARD_TUH_RHPORT, TUH_CFGID_RPI_PIO_USB_CONFIGURATION, &pio_cfg);
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#endif
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#ifdef LED_PIN
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bi_decl(bi_1pin_with_name(LED_PIN, "LED"));
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gpio_init(LED_PIN);
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gpio_set_dir(LED_PIN, GPIO_OUT);
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#endif
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// Button
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#ifndef BUTTON_BOOTSEL
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#endif
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#ifdef UART_DEV
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bi_decl(bi_2pins_with_func(UART_TX_PIN, UART_TX_PIN, GPIO_FUNC_UART));
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uart_inst = uart_get_instance(UART_DEV);
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stdio_uart_init_full(uart_inst, CFG_BOARD_UART_BAUDRATE, UART_TX_PIN, UART_RX_PIN);
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#endif
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#if defined(LOGGER_RTT)
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stdio_rtt_init();
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#endif
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#if CFG_TUD_ENABLED
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// TODO probably set up device mode?
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#endif
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#if CFG_TUH_ENABLED
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// set portfunc to host !!!
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#endif
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}
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//--------------------------------------------------------------------+
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// Board porting API
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//--------------------------------------------------------------------+
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void board_led_write(bool state)
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{
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(void) state;
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#ifdef LED_PIN
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gpio_put(LED_PIN, state ? LED_STATE_ON : (1-LED_STATE_ON));
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#endif
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}
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uint32_t board_button_read(void)
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{
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#ifdef BUTTON_BOOTSEL
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return BUTTON_STATE_ACTIVE == get_bootsel_button();
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#else
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return 0;
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#endif
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}
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int board_uart_read(uint8_t* buf, int len)
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{
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#ifdef UART_DEV
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int count = 0;
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while ( (count < len) && uart_is_readable(uart_inst) )
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{
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buf[count] = uart_getc(uart_inst);
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count++;
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}
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return count;
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#else
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(void) buf; (void) len;
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return 0;
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#endif
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}
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int board_uart_write(void const * buf, int len)
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{
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#ifdef UART_DEV
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char const* bufch = (char const*) buf;
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for(int i=0;i<len;i++) {
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uart_putc(uart_inst, bufch[i]);
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}
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return len;
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#else
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(void) buf; (void) len;
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return 0;
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#endif
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}
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int board_getchar(void)
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{
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return getchar_timeout_us(0);
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}
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//--------------------------------------------------------------------+
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// USB Interrupt Handler
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// rp2040 implementation will install appropriate handler when initializing
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// tinyusb. There is no need to forward IRQ from application
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//--------------------------------------------------------------------+
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