From d7173967087e022d20d1f9c812b1b668e9d3f71b Mon Sep 17 00:00:00 2001 From: Stefan Kerkmann Date: Thu, 30 Jun 2022 13:19:27 +0200 Subject: [Core] Add Raspberry Pi RP2040 support (#14877) * Disable RESET keycode because of naming conflicts * Add Pico SDK as submodule * Add RP2040 build support to QMK * Adjust USB endpoint structs for RP2040 * Add RP2040 bootloader and double-tap reset routine * Add generic and pro micro RP2040 boards * Add RP2040 onekey keyboard * Add WS2812 PIO DMA enabled driver and documentation Supports regular and open-drain output configuration. RP2040 GPIOs are sadly not 5V tolerant, so this is a bit use-less or needs extra hardware or you take the risk to fry your hardware. * Adjust SIO Driver for RP2040 * Adjust I2C Driver for RP2040 * Adjust SPI Driver for RP2040 * Add PIO serial driver and documentation * Add general RP2040 documentation * Apply suggestions from code review Co-authored-by: Nick Brassel Co-authored-by: Nick Brassel --- platforms/chibios/bootloaders/rp2040.c | 57 ++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 platforms/chibios/bootloaders/rp2040.c (limited to 'platforms/chibios/bootloaders/rp2040.c') diff --git a/platforms/chibios/bootloaders/rp2040.c b/platforms/chibios/bootloaders/rp2040.c new file mode 100644 index 0000000000..13a54036ef --- /dev/null +++ b/platforms/chibios/bootloaders/rp2040.c @@ -0,0 +1,57 @@ +// Copyright 2022 Stefan Kerkmann +// SPDX-License-Identifier: GPL-2.0-or-later + +#include "quantum.h" +#include "hal.h" +#include "bootloader.h" +#include "pico/bootrom.h" + +#if !defined(RP2040_BOOTLOADER_DOUBLE_TAP_RESET_LED) +# define RP2040_BOOTLOADER_DOUBLE_TAP_RESET_LED_MASK 0U +#else +# define RP2040_BOOTLOADER_DOUBLE_TAP_RESET_LED_MASK (1U << RP2040_BOOTLOADER_DOUBLE_TAP_RESET_LED) +#endif + +__attribute__((weak)) void mcu_reset(void) { + NVIC_SystemReset(); +} +void bootloader_jump(void) { + reset_usb_boot(RP2040_BOOTLOADER_DOUBLE_TAP_RESET_LED_MASK, 0U); +} + +void enter_bootloader_mode_if_requested(void) {} + +#if defined(RP2040_BOOTLOADER_DOUBLE_TAP_RESET) +# if !defined(RP2040_BOOTLOADER_DOUBLE_TAP_RESET_TIMEOUT) +# define RP2040_BOOTLOADER_DOUBLE_TAP_RESET_TIMEOUT 200U +# endif + +// Needs to be located in a RAM section that is never initialized on boot to +// preserve its value on reset +static volatile uint32_t __attribute__((section(".ram0.bootloader_magic"))) magic_location; +const uint32_t magic_token = 0xCAFEB0BA; + +// We can not use the __early_init / enter_bootloader_mode_if_requested hook as +// we depend on an already initialized system with usable memory regions and +// populated function pointer tables to the optimized math functions in the +// bootrom. This function is called just prior to main. +void __late_init(void) { + // All clocks have to be enabled before jumping to the bootloader function, + // otherwise the bootrom will be stuck infinitely. + clocks_init(); + + if (magic_location != magic_token) { + magic_location = magic_token; + // ChibiOS is not initialized at this point, so sleeping is only + // possible via busy waiting. The internal timer peripheral is running + // at this point with a precision of 1us. + chSysPolledDelayX(MS2RTC(1 * MHZ, RP2040_BOOTLOADER_DOUBLE_TAP_RESET_TIMEOUT)); + magic_location = 0; + return; + } + + magic_location = 0; + reset_usb_boot(RP2040_BOOTLOADER_DOUBLE_TAP_RESET_LED_MASK, 0U); +} + +#endif -- cgit v1.2.1 From 3f5dc472965e6a5b8efe60e33c7b6c2d18d92008 Mon Sep 17 00:00:00 2001 From: Stefan Kerkmann Date: Mon, 11 Jul 2022 15:17:05 +0200 Subject: [Core] Use polled waiting on ChibiOS platforms that support it (#17607) * Use polled waiting on platforms that support it Due to context switching overhead waiting a very short amount of time on a sleeping thread is often not accurate and in fact not usable for timing critical usage i.e. in a driver. Thus we use polled waiting for ranges in the us range on platforms that support it instead. The fallback is the thread sleeping mechanism. This includes: * ARM platforms with CYCCNT register (ARMv7, ARMv8) this is incremented at CPU clock frequency * GD32VF103 RISC-V port with CSR_MCYCLE register this is incremented at CPU clock frequency * RP2040 ARMv6 port which uses the integrated timer peripheral which is incremented with a fixed 1MHz frequency * Use wait_us() instead of chSysPolledDelayX ...as it is powered by busy waiting now. * Add chibios waiting methods test bench --- platforms/chibios/bootloaders/rp2040.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) (limited to 'platforms/chibios/bootloaders/rp2040.c') diff --git a/platforms/chibios/bootloaders/rp2040.c b/platforms/chibios/bootloaders/rp2040.c index 13a54036ef..bedc00f32e 100644 --- a/platforms/chibios/bootloaders/rp2040.c +++ b/platforms/chibios/bootloaders/rp2040.c @@ -43,9 +43,8 @@ void __late_init(void) { if (magic_location != magic_token) { magic_location = magic_token; // ChibiOS is not initialized at this point, so sleeping is only - // possible via busy waiting. The internal timer peripheral is running - // at this point with a precision of 1us. - chSysPolledDelayX(MS2RTC(1 * MHZ, RP2040_BOOTLOADER_DOUBLE_TAP_RESET_TIMEOUT)); + // possible via busy waiting. + wait_us(RP2040_BOOTLOADER_DOUBLE_TAP_RESET_TIMEOUT * 1000U); magic_location = 0; return; } -- cgit v1.2.1