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| 1 | +/********************************************************************* |
| 2 | + Adafruit invests time and resources providing this open source code, |
| 3 | + please support Adafruit and open-source hardware by purchasing |
| 4 | + products from Adafruit! |
| 5 | +
|
| 6 | + MIT license, check LICENSE for more information |
| 7 | + Copyright (c) 2019 Ha Thach for Adafruit Industries |
| 8 | + All text above, and the splash screen below must be included in |
| 9 | + any redistribution |
| 10 | +*********************************************************************/ |
| 11 | + |
| 12 | + |
| 13 | +/* This example demonstrates use of both device and host, where |
| 14 | + * - Device run on native usb controller (controller0) |
| 15 | + * - Host run on bit-banging 2 GPIOs with the help of Pico-PIO-USB library (controller1) |
| 16 | + * |
| 17 | + * Example will log CPU temperature periodically (ms,value) to USB thumbdrive |
| 18 | + * |
| 19 | + * Requirements: |
| 20 | + * - [Pico-PIO-USB](https://github.com/sekigon-gonnoc/Pico-PIO-USB) library |
| 21 | + * - 2 consecutive GPIOs: D+ is defined by HOST_PIN_DP (gpio20), D- = D+ +1 (gpio21) |
| 22 | + * - Provide VBus (5v) and GND for peripheral |
| 23 | + * - CPU Speed must be either 120 or 240 Mhz. Selected via "Menu -> CPU Speed" |
| 24 | + */ |
| 25 | + |
| 26 | +// pio-usb is required for rp2040 host |
| 27 | +#include "pio_usb.h" |
| 28 | + |
| 29 | +// SdFat is required for using Adafruit_USBH_MSC_SdFatDevice |
| 30 | +#include "SdFat.h" |
| 31 | + |
| 32 | +// TinyUSB lib |
| 33 | +#include "Adafruit_TinyUSB.h" |
| 34 | + |
| 35 | +// Pin D+ for host, D- = D+ + 1 |
| 36 | +#define HOST_PIN_DP 20 |
| 37 | + |
| 38 | +// Pin for enabling Host VBUS. comment out if not used |
| 39 | +#define HOST_PIN_VBUS_EN 22 |
| 40 | +#define HOST_PIN_VBUS_EN_STATE 1 |
| 41 | + |
| 42 | + |
| 43 | +#define LOG_FILE "cpu_temp.txt" |
| 44 | +#define LOG_INTERVAL 5000 |
| 45 | + |
| 46 | +// USB Host object |
| 47 | +Adafruit_USBH_Host USBHost; |
| 48 | + |
| 49 | +// USB Host MSC Block Device object which implemented API for use with SdFat |
| 50 | +Adafruit_USBH_MSC_BlockDevice msc_block_dev; |
| 51 | + |
| 52 | +// file system object from SdFat |
| 53 | +FatVolume fatfs; |
| 54 | +File32 f_log; |
| 55 | + |
| 56 | +// if file system is successfully mounted on usb block device |
| 57 | +volatile bool is_mounted = false; |
| 58 | + |
| 59 | +//--------------------------------------------------------------------+ |
| 60 | +// Setup and Loop on Core0 |
| 61 | +//--------------------------------------------------------------------+ |
| 62 | + |
| 63 | +void setup() |
| 64 | +{ |
| 65 | + Serial1.begin(115200); |
| 66 | + |
| 67 | + Serial.begin(115200); |
| 68 | + //while ( !Serial ) delay(10); // wait for native usb |
| 69 | + |
| 70 | + Serial.println("TinyUSB Host MassStorage Data Logger Example"); |
| 71 | +} |
| 72 | + |
| 73 | +void loop() |
| 74 | +{ |
| 75 | + // nothing to do |
| 76 | + if (!is_mounted) return; |
| 77 | + |
| 78 | + f_log = fatfs.open(LOG_FILE, O_WRITE | O_APPEND | O_CREAT); |
| 79 | + |
| 80 | + if (!f_log) { |
| 81 | + Serial.println("Cannot create file: " LOG_FILE); |
| 82 | + }else { |
| 83 | + float cpu_temp = analogReadTemp(); |
| 84 | + |
| 85 | + f_log.printf("%u\t%.02f\r\n", millis(), cpu_temp); |
| 86 | + |
| 87 | + f_log.close(); |
| 88 | + } |
| 89 | + |
| 90 | + delay(LOG_INTERVAL); |
| 91 | +} |
| 92 | + |
| 93 | +//--------------------------------------------------------------------+ |
| 94 | +// Setup and Loop on Core1 |
| 95 | +//--------------------------------------------------------------------+ |
| 96 | + |
| 97 | +void setup1() { |
| 98 | + //while ( !Serial ) delay(10); // wait for native usb |
| 99 | + Serial.println("Core1 setup to run TinyUSB host with pio-usb"); |
| 100 | + |
| 101 | + // Check for CPU frequency, must be multiple of 120Mhz for bit-banging USB |
| 102 | + uint32_t cpu_hz = clock_get_hz(clk_sys); |
| 103 | + if ( cpu_hz != 120000000UL && cpu_hz != 240000000UL ) { |
| 104 | + while ( !Serial ) { |
| 105 | + delay(10); // wait for native usb |
| 106 | + } |
| 107 | + Serial.printf("Error: CPU Clock = %u, PIO USB require CPU clock must be multiple of 120 Mhz\r\n", cpu_hz); |
| 108 | + Serial.printf("Change your CPU Clock to either 120 or 240 Mhz in Menu->CPU Speed \r\n", cpu_hz); |
| 109 | + while(1) { |
| 110 | + delay(1); |
| 111 | + } |
| 112 | + } |
| 113 | + |
| 114 | +#ifdef HOST_PIN_VBUS_EN |
| 115 | + pinMode(HOST_PIN_VBUS_EN, OUTPUT); |
| 116 | + digitalWrite(HOST_PIN_VBUS_EN, HOST_PIN_VBUS_EN_STATE); |
| 117 | +#endif |
| 118 | + |
| 119 | + pio_usb_configuration_t pio_cfg = PIO_USB_DEFAULT_CONFIG; |
| 120 | + pio_cfg.pin_dp = HOST_PIN_DP; |
| 121 | + USBHost.configure_pio_usb(1, &pio_cfg); |
| 122 | + |
| 123 | + // run host stack on controller (rhport) 1 |
| 124 | + // Note: For rp2040 pico-pio-usb, calling USBHost.begin() on core1 will have most of the |
| 125 | + // host bit-banging processing works done in core1 to free up core0 for other works |
| 126 | + USBHost.begin(1); |
| 127 | +} |
| 128 | + |
| 129 | +void loop1() |
| 130 | +{ |
| 131 | + USBHost.task(); |
| 132 | + Serial.flush(); |
| 133 | +} |
| 134 | + |
| 135 | +//--------------------------------------------------------------------+ |
| 136 | +// TinyUSB Host callbacks |
| 137 | +//--------------------------------------------------------------------+ |
| 138 | + |
| 139 | +// Invoked when device is mounted (configured) |
| 140 | +void tuh_mount_cb (uint8_t daddr) |
| 141 | +{ |
| 142 | + (void) daddr; |
| 143 | +} |
| 144 | + |
| 145 | +/// Invoked when device is unmounted (bus reset/unplugged) |
| 146 | +void tuh_umount_cb(uint8_t daddr) |
| 147 | +{ |
| 148 | + (void) daddr; |
| 149 | +} |
| 150 | + |
| 151 | +// Invoked when a device with MassStorage interface is mounted |
| 152 | +void tuh_msc_mount_cb(uint8_t dev_addr) |
| 153 | +{ |
| 154 | + // Initialize block device with MSC device address |
| 155 | + msc_block_dev.begin(dev_addr); |
| 156 | + |
| 157 | + // For simplicity this example only support LUN 0 |
| 158 | + msc_block_dev.setActiveLUN(0); |
| 159 | + |
| 160 | + is_mounted = fatfs.begin(&msc_block_dev); |
| 161 | + |
| 162 | + if (is_mounted) { |
| 163 | + fatfs.ls(&Serial, LS_SIZE); |
| 164 | + }else { |
| 165 | + Serial.println("Failed to mount mass storage device. Make sure it is formatted as FAT"); |
| 166 | + } |
| 167 | +} |
| 168 | + |
| 169 | +// Invoked when a device with MassStorage interface is unmounted |
| 170 | +void tuh_msc_umount_cb(uint8_t dev_addr) |
| 171 | +{ |
| 172 | + (void) dev_addr; |
| 173 | + |
| 174 | + // unmount file system |
| 175 | + is_mounted = false; |
| 176 | + fatfs.end(); |
| 177 | + |
| 178 | + // end block device |
| 179 | + msc_block_dev.end(); |
| 180 | +} |
| 181 | + |
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