diff options
Diffstat (limited to 'tinyusb/hw/bsp/rp2040/family.c')
-rwxr-xr-x | tinyusb/hw/bsp/rp2040/family.c | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/tinyusb/hw/bsp/rp2040/family.c b/tinyusb/hw/bsp/rp2040/family.c new file mode 100755 index 00000000..10ead277 --- /dev/null +++ b/tinyusb/hw/bsp/rp2040/family.c @@ -0,0 +1,199 @@ +/* + * 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 +//--------------------------------------------------------------------+ |