RP2040 support

Marlin/src/HAL/RP2040/HAL.cpp

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+/**
+ * Marlin 3D Printer Firmware
+ *
+ * Copyright (c) 2022 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
+ * Copyright (c) 2015-2016 Nico Tonnhofer wurstnase.reprap@gmail.com
+ * Copyright (c) 2017 Victor Perez
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+#include "../platforms.h"
+
+#ifdef __PLAT_RP2040__
+
+#include "HAL.h"
+//#include "usb_serial.h"
+
+#include "../../inc/MarlinConfig.h"
+#include "../shared/Delay.h"
+
+extern "C" {
+  #include "pico/bootrom.h"
+  #include "hardware/watchdog.h"
+}
+
+#ifdef USBCON
+  DefaultSerial1 MSerial0(false, SerialUSB);
+#endif
+
+#if ENABLED(SRAM_EEPROM_EMULATION)
+  #if STM32F7xx
+    #include <stm32f7xx_ll_pwr.h>
+  #elif STM32F4xx
+    #include <stm32f4xx_ll_pwr.h>
+  #else
+    #error "SRAM_EEPROM_EMULATION is currently only supported for STM32F4xx and STM32F7xx"
+  #endif
+#endif
+
+#if HAS_SD_HOST_DRIVE
+  #include "msc_sd.h"
+  #include "usbd_cdc_if.h"
+#endif
+
+// ------------------------
+// Public Variables
+// ------------------------
+
+volatile uint16_t HAL_adc_result;
+
+// ------------------------
+// Public functions
+// ------------------------
+
+TERN_(POSTMORTEM_DEBUGGING, extern void install_min_serial());
+
+// HAL initialization task
+void HAL_init() {
+  // Ensure F_CPU is a constant expression.
+  // If the compiler breaks here, it means that delay code that should compute at compile time will not work.
+  // So better safe than sorry here.
+  constexpr int cpuFreq = F_CPU;
+  UNUSED(cpuFreq);
+
+  #if ENABLED(SDSUPPORT) && DISABLED(SDIO_SUPPORT) && (defined(SDSS) && SDSS != -1)
+    OUT_WRITE(SDSS, HIGH); // Try to set SDSS inactive before any other SPI users start up
+  #endif
+
+  #if PIN_EXISTS(LED)
+    OUT_WRITE(LED_PIN, LOW);
+  #endif
+
+  #if ENABLED(SRAM_EEPROM_EMULATION)
+    // __HAL_RCC_PWR_CLK_ENABLE();
+    // HAL_PWR_EnableBkUpAccess();           // Enable access to backup SRAM
+    // __HAL_RCC_BKPSRAM_CLK_ENABLE();
+    // LL_PWR_EnableBkUpRegulator();         // Enable backup regulator
+    // while (!LL_PWR_IsActiveFlag_BRR());   // Wait until backup regulator is initialized
+  #endif
+
+  HAL_timer_init();
+
+  #if ENABLED(EMERGENCY_PARSER) && USBD_USE_CDC
+    USB_Hook_init();
+  #endif
+
+  TERN_(POSTMORTEM_DEBUGGING, install_min_serial());    // Install the min serial handler
+
+  TERN_(HAS_SD_HOST_DRIVE, MSC_SD_init());              // Enable USB SD card access
+
+  #if PIN_EXISTS(USB_CONNECT)
+    OUT_WRITE(USB_CONNECT_PIN, !USB_CONNECT_INVERTING); // USB clear connection
+    delay(1000);                                        // Give OS time to notice
+    WRITE(USB_CONNECT_PIN, USB_CONNECT_INVERTING);
+  #endif
+}
+
+// HAL idle task
+void HAL_idletask() {
+  #if HAS_SHARED_MEDIA
+    // Stm32duino currently doesn't have a "loop/idle" method
+    // CDC_resume_receive();
+    // CDC_continue_transmit();
+  #endif
+}
+
+void HAL_clear_reset_source() { } // Nothing to do
+
+uint8_t HAL_get_reset_source() {
+  byte result = 0;
+ if(watchdog_caused_reboot() ) result |= RST_WATCHDOG;
+
+  return result;
+}
+
+void HAL_reboot() { reset_usb_boot(0, 0); }
+
+void _delay_ms(const int delay_ms) { delay(delay_ms); }
+
+extern "C" {
+  extern unsigned int _ebss; // end of bss section
+}
+
+// ------------------------
+// ADC
+// ------------------------
+
+volatile uint8_t HAL_adc_conversion_state = 0;
+
+void HAL_adc_isr() {
+  adc_run(false); //disable as we only want one result
+  irq_clear(ADC_IRQ_FIFO); //clear the irq
+
+  if (adc_fifo_get_level() >= 1  ){
+    HAL_adc_result = adc_fifo_get(); //pop the result
+    adc_fifo_drain();
+    HAL_adc_conversion_state = 1; //signal the end of the conversion
+  }
+}
+
+void HAL_adc_init() {
+  analogReadResolution(HAL_ADC_RESOLUTION);
+  adc_init();
+  adc_fifo_setup(true,false,1,false,false);
+  irq_set_exclusive_handler(ADC_IRQ_FIFO, HAL_adc_isr);
+  irq_set_enabled(ADC_IRQ_FIFO, true);
+  adc_irq_set_enabled(true);
+
+}
+
+void HAL_adc_select_pin(const uint8_t adc_pin) {
+  if (adc_pin >= A0 && adc_pin <= A3) {
+    adc_gpio_init(adc_pin);
+  }
+  else if (adc_pin == HAL_ADC_MCU_TEMP_DUMMY_PIN) {
+    adc_set_temp_sensor_enabled(true);
+  }
+}
+
+void HAL_adc_start_conversion(const uint8_t adc_pin) {
+  HAL_adc_conversion_state = 0;
+
+  if (adc_pin != HAL_ADC_MCU_TEMP_DUMMY_PIN) {
+    adc_select_input(adc_pin-A0); //ADC Channel is Offset from the GPIO Channel
+  }
+  else {
+    adc_select_input(4);
+  }
+
+ // adc_fifo_drain();
+  adc_run(true);
+}
+uint16_t HAL_adc_get_result() { return HAL_adc_result; }
+
+uint8_t HAL_adc_conversion_done() {
+  return HAL_adc_conversion_state;
+}
+
+// ------------------------
+
+
+// Reset the system to initiate a firmware flash
+void flashFirmware(const int16_t) { HAL_reboot(); }
+
+// Maple Compatibility
+volatile uint32_t systick_uptime_millis = 0;
+systickCallback_t systick_user_callback;
+void systick_attach_callback(systickCallback_t cb) { systick_user_callback = cb; }
+void HAL_SYSTICK_Callback() {
+  systick_uptime_millis++;
+  if (systick_user_callback) systick_user_callback();
+}
+
+#endif // __PLAT_RP2040__