Add Serial(USB) support
Serial via USB /dev/ttyACM0 now works using standalone minicom terminal app but not via the IDE's serial monitor.
This commit is contained in:
Earle F. Philhower, III
parent
e95f45ad10
commit
369dea88ba
6 changed files with 262 additions and 4 deletions
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@ -14,9 +14,13 @@ To install:
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````
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mkdir -p ~/Arduino/hardware/pico
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git clone https://github.com/earlephilhower/arduino-pico.git ~/Arduino/hardware/pico/rp2040
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cd ~/Arduino/hardware/pico/rp2040/system
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cd ~/Arduino/hardware/pico/rp2040
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git submodule init
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git submodule update
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cd pico-sdk
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git submodule init
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git submodule update
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cd ../system
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python3 ./get.py
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`````
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@ -44,6 +44,10 @@ void delayMicroseconds(unsigned int us);
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} // extern "C"
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#endif
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#ifdef __cplusplus
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#include "SerialUSB.h"
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#endif
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// ARM toolchain doesn't provide itoa etc, provide them
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#include "api/itoa.h"
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222
cores/rp2040/SerialUSB.cpp
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222
cores/rp2040/SerialUSB.cpp
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@ -0,0 +1,222 @@
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#include <Arduino.h>
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SerialUSB Serial;
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extern "C" {
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#include "tusb.h"
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#include "pico/time.h"
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#include "pico/binary_info.h"
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#include "hardware/irq.h"
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#include "pico/mutex.h"
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}
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#define PICO_STDIO_USB_TASK_INTERVAL_US 1000
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#define PICO_STDIO_USB_LOW_PRIORITY_IRQ 31
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#define USBD_VID (0x2E8A) // Raspberry Pi
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#define USBD_PID (0x000a) // Raspberry Pi Pico SDK CDC
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#define USBD_DESC_LEN (TUD_CONFIG_DESC_LEN + TUD_CDC_DESC_LEN)
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#define USBD_MAX_POWER_MA (250)
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#define USBD_ITF_CDC (0) // needs 2 interfaces
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#define USBD_ITF_MAX (2)
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#define USBD_CDC_EP_CMD (0x81)
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#define USBD_CDC_EP_OUT (0x02)
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#define USBD_CDC_EP_IN (0x82)
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#define USBD_CDC_CMD_MAX_SIZE (8)
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#define USBD_CDC_IN_OUT_MAX_SIZE (64)
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#define USBD_STR_0 (0x00)
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#define USBD_STR_MANUF (0x01)
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#define USBD_STR_PRODUCT (0x02)
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#define USBD_STR_SERIAL (0x03)
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#define USBD_STR_CDC (0x04)
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// Note: descriptors returned from callbacks must exist long enough for transfer to complete
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static const tusb_desc_device_t usbd_desc_device = {
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.bLength = sizeof(tusb_desc_device_t),
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.bDescriptorType = TUSB_DESC_DEVICE,
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.bcdUSB = 0x0200,
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.bDeviceClass = TUSB_CLASS_MISC,
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.bDeviceSubClass = MISC_SUBCLASS_COMMON,
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.bDeviceProtocol = MISC_PROTOCOL_IAD,
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.bMaxPacketSize0 = CFG_TUD_ENDPOINT0_SIZE,
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.idVendor = USBD_VID,
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.idProduct = USBD_PID,
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.bcdDevice = 0x0100,
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.iManufacturer = USBD_STR_MANUF,
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.iProduct = USBD_STR_PRODUCT,
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.iSerialNumber = USBD_STR_SERIAL,
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.bNumConfigurations = 1,
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};
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static const uint8_t usbd_desc_cfg[USBD_DESC_LEN] = {
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TUD_CONFIG_DESCRIPTOR(1, USBD_ITF_MAX, USBD_STR_0, USBD_DESC_LEN,
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TUSB_DESC_CONFIG_ATT_REMOTE_WAKEUP, USBD_MAX_POWER_MA),
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TUD_CDC_DESCRIPTOR(USBD_ITF_CDC, USBD_STR_CDC, USBD_CDC_EP_CMD,
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USBD_CDC_CMD_MAX_SIZE, USBD_CDC_EP_OUT, USBD_CDC_EP_IN, USBD_CDC_IN_OUT_MAX_SIZE),
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};
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static const char *const usbd_desc_str[] = {
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[USBD_STR_0] = "",
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[USBD_STR_MANUF] = "Raspberry Pi",
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[USBD_STR_PRODUCT] = "PicoArduino",
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[USBD_STR_SERIAL] = "000000000000", // TODO
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[USBD_STR_CDC] = "Board CDC",
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};
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const uint8_t *tud_descriptor_device_cb(void) {
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return (const uint8_t *)&usbd_desc_device;
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}
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const uint8_t *tud_descriptor_configuration_cb(uint8_t index) {
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(void)index;
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return usbd_desc_cfg;
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}
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const uint16_t *tud_descriptor_string_cb(uint8_t index, uint16_t langid) {
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#define DESC_STR_MAX (20)
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static uint16_t desc_str[DESC_STR_MAX];
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uint8_t len;
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if (index == 0) {
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desc_str[1] = 0x0409; // supported language is English
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len = 1;
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} else {
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if (index >= sizeof(usbd_desc_str) / sizeof(usbd_desc_str[0])) {
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return NULL;
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}
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const char *str = usbd_desc_str[index];
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for (len = 0; len < DESC_STR_MAX - 1 && str[len]; ++len) {
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desc_str[1 + len] = str[len];
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}
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}
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// first byte is length (including header), second byte is string type
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desc_str[0] = (TUSB_DESC_STRING << 8) | (2 * len + 2);
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return desc_str;
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}
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static mutex_t usb_mutex;
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static void low_priority_worker_irq() {
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// if the mutex is already owned, then we are in user code
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// in this file which will do a tud_task itself, so we'll just do nothing
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// until the next tick; we won't starve
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if (mutex_try_enter(&usb_mutex, NULL)) {
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tud_task();
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mutex_exit(&usb_mutex);
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}
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}
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static int64_t timer_task(__unused alarm_id_t id, __unused void *user_data) {
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irq_set_pending(PICO_STDIO_USB_LOW_PRIORITY_IRQ);
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return PICO_STDIO_USB_TASK_INTERVAL_US;
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}
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void SerialUSB::begin(int baud) {
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(void) baud; //ignored
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tusb_init();
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irq_set_exclusive_handler(PICO_STDIO_USB_LOW_PRIORITY_IRQ, low_priority_worker_irq);
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irq_set_enabled(PICO_STDIO_USB_LOW_PRIORITY_IRQ, true);
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mutex_init(&usb_mutex);
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add_alarm_in_us(PICO_STDIO_USB_TASK_INTERVAL_US, timer_task, NULL, true);
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}
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void SerialUSB::end() {
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// TODO
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}
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int SerialUSB::peek() {
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uint8_t c;
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uint32_t owner;
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if (!mutex_try_enter(&usb_mutex, &owner)) {
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if (owner == get_core_num()) return -1; // would deadlock otherwise
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mutex_enter_blocking(&usb_mutex);
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}
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auto ret = tud_cdc_peek(0, &c) ? (int) c : -1;
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mutex_exit(&usb_mutex);
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return ret;
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}
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int SerialUSB::read() {
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uint32_t owner;
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if (!mutex_try_enter(&usb_mutex, &owner)) {
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if (owner == get_core_num()) return -1; // would deadlock otherwise
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mutex_enter_blocking(&usb_mutex);
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}
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if (tud_cdc_connected() && tud_cdc_available()) {
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int ch = tud_cdc_read_char();
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mutex_exit(&usb_mutex);
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return ch;
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}
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mutex_exit(&usb_mutex);
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return -1;
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}
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int SerialUSB::available() {
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uint32_t owner;
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if (!mutex_try_enter(&usb_mutex, &owner)) {
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if (owner == get_core_num()) return 0; // would deadlock otherwise
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mutex_enter_blocking(&usb_mutex);
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}
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auto ret = tud_cdc_available();
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mutex_exit(&usb_mutex);
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return ret;
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}
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int SerialUSB::availableForWrite() {
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uint32_t owner;
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if (!mutex_try_enter(&usb_mutex, &owner)) {
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if (owner == get_core_num()) return 0; // would deadlock otherwise
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mutex_enter_blocking(&usb_mutex);
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}
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auto ret = tud_cdc_write_available();
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mutex_exit(&usb_mutex);
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return ret;
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}
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void SerialUSB::flush() {
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uint32_t owner;
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if (!mutex_try_enter(&usb_mutex, &owner)) {
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if (owner == get_core_num()) return; // would deadlock otherwise
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mutex_enter_blocking(&usb_mutex);
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}
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tud_cdc_write_flush();
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mutex_exit(&usb_mutex);
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}
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size_t SerialUSB::write(uint8_t c) {
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return write(&c, 1);
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}
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size_t SerialUSB::write(const uint8_t *p, size_t len) {
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uint32_t owner;
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if (!mutex_try_enter(&usb_mutex, &owner)) {
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if (owner == get_core_num()) return 0; // would deadlock otherwise
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mutex_enter_blocking(&usb_mutex);
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}
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size_t remain = len;
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while (remain && tud_cdc_connected()) {
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size_t cnt = tud_cdc_write(p, remain);
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p += cnt;
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remain -= cnt;
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tud_task();
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tud_cdc_write_flush();
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}
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mutex_exit(&usb_mutex);
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return len - remain;
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}
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SerialUSB::operator bool() {
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uint32_t owner;
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if (!mutex_try_enter(&usb_mutex, &owner)) {
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if (owner == get_core_num()) return -1; // would deadlock otherwise
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mutex_enter_blocking(&usb_mutex);
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}
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tud_task();
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auto ret = tud_cdc_connected();
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mutex_exit(&usb_mutex);
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return ret;
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}
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28
cores/rp2040/SerialUSB.h
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28
cores/rp2040/SerialUSB.h
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#ifndef __SERIALUSB_H__
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#define __SERIALUSB_H__
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#include "api/Stream.h"
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class SerialUSB : public Stream
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{
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public:
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SerialUSB() { }
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void begin(int baud = 115200);
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void end();
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virtual int peek() override;
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virtual int read() override;
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virtual int available() override;
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virtual int availableForWrite() override;
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virtual void flush() override;
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virtual size_t write(uint8_t c) override;
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virtual size_t write(const uint8_t *p, size_t len) override;
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using Print::write;
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operator bool();
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};
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extern SerialUSB Serial;
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#endif
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@ -39,18 +39,18 @@ compiler.warning_flags.more=-Wall
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compiler.warning_flags.all=-Wall -Wextra
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compiler.defines={build.led}
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compiler.includes=-I{runtime.platform.path}/pico_base/ -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_platform/include/ -I{runtime.platform.path}/pico-sdk/src/common/pico_base/include/ -I{runtime.platform.path}/pico-sdk/src/rp2040/hardware_regs/include/ -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_timer/include/ -I{runtime.platform.path}/pico-sdk/src/common/pico_stdlib/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_gpio/include -I{runtime.platform.path}/pico-sdk/src/common/pico_base/include -I{runtime.platform.path}/pico-examples/build/generated/pico_base -I{runtime.platform.path}/pico-sdk/src/boards/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_platform/include -I{runtime.platform.path}/pico-sdk/src/rp2040/hardware_regs/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_base/include -I{runtime.platform.path}/pico-sdk/src/rp2040/hardware_structs/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_claim/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_sync/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_uart/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_divider/include -I{runtime.platform.path}/pico-sdk/src/common/pico_time/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_timer/include -I{runtime.platform.path}/pico-sdk/src/common/pico_sync/include -I{runtime.platform.path}/pico-sdk/src/common/pico_util/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_runtime/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_clocks/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_resets/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_watchdog/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_xosc/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_pll/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_vreg/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_irq/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_printf/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_bootrom/include -I{runtime.platform.path}/pico-sdk/src/common/pico_bit_ops/include -I{runtime.platform.path}/pico-sdk/src/common/pico_divider/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_double/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_int64_ops/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_float/include -I{runtime.platform.path}/pico-sdk/src/common/pico_binary_info/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_stdio/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_stdio_uart/include -I{runtime.platform.path}/pico-sdk/src/rp2040/hardware_regs/include/
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compiler.includes=-I{runtime.platform.path}/pico_base/ -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_platform/include/ -I{runtime.platform.path}/pico-sdk/src/common/pico_base/include/ -I{runtime.platform.path}/pico-sdk/src/rp2040/hardware_regs/include/ -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_timer/include/ -I{runtime.platform.path}/pico-sdk/src/common/pico_stdlib/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_gpio/include -I{runtime.platform.path}/pico-sdk/src/common/pico_base/include -I{runtime.platform.path}/pico-examples/build/generated/pico_base -I{runtime.platform.path}/pico-sdk/src/boards/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_platform/include -I{runtime.platform.path}/pico-sdk/src/rp2040/hardware_regs/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_base/include -I{runtime.platform.path}/pico-sdk/src/rp2040/hardware_structs/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_claim/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_sync/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_uart/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_divider/include -I{runtime.platform.path}/pico-sdk/src/common/pico_time/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_timer/include -I{runtime.platform.path}/pico-sdk/src/common/pico_sync/include -I{runtime.platform.path}/pico-sdk/src/common/pico_util/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_runtime/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_clocks/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_resets/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_watchdog/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_xosc/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_pll/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_vreg/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_irq/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_printf/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_bootrom/include -I{runtime.platform.path}/pico-sdk/src/common/pico_bit_ops/include -I{runtime.platform.path}/pico-sdk/src/common/pico_divider/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_double/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_int64_ops/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_float/include -I{runtime.platform.path}/pico-sdk/src/common/pico_binary_info/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_stdio/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_stdio_uart/include -I{runtime.platform.path}/pico-sdk/src/rp2040/hardware_regs/include/ -I{runtime.platform.path}/pico-sdk/lib/tinyusb/src/ -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_stdio_usb/include
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compiler.flags=-Os -march=armv6-m -mcpu=cortex-m0plus -mthumb -Os -DNDEBUG -ffunction-sections -fdata-sections
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compiler.wrap=-Wl,--wrap=acos -Wl,--wrap=acosf -Wl,--wrap=acosh -Wl,--wrap=acoshf -Wl,--wrap=__aeabi_cdcmpeq -Wl,--wrap=__aeabi_cdcmple -Wl,--wrap=__aeabi_cdrcmple -Wl,--wrap=__aeabi_cfcmpeq -Wl,--wrap=__aeabi_cfcmple -Wl,--wrap=__aeabi_cfrcmple -Wl,--wrap=__aeabi_d2f -Wl,--wrap=__aeabi_d2iz -Wl,--wrap=__aeabi_d2lz -Wl,--wrap=__aeabi_d2uiz -Wl,--wrap=__aeabi_d2ulz -Wl,--wrap=__aeabi_dadd -Wl,--wrap=__aeabi_dcmpeq -Wl,--wrap=__aeabi_dcmpge -Wl,--wrap=__aeabi_dcmpgt -Wl,--wrap=__aeabi_dcmple -Wl,--wrap=__aeabi_dcmplt -Wl,--wrap=__aeabi_dcmpun -Wl,--wrap=__aeabi_ddiv -Wl,--wrap=__aeabi_dmul -Wl,--wrap=__aeabi_drsub -Wl,--wrap=__aeabi_dsub -Wl,--wrap=__aeabi_f2d -Wl,--wrap=__aeabi_f2iz -Wl,--wrap=__aeabi_f2lz -Wl,--wrap=__aeabi_f2uiz -Wl,--wrap=__aeabi_f2ulz -Wl,--wrap=__aeabi_fadd -Wl,--wrap=__aeabi_fcmpeq -Wl,--wrap=__aeabi_fcmpge -Wl,--wrap=__aeabi_fcmpgt -Wl,--wrap=__aeabi_fcmple -Wl,--wrap=__aeabi_fcmplt -Wl,--wrap=__aeabi_fcmpun -Wl,--wrap=__aeabi_fdiv -Wl,--wrap=__aeabi_fmul -Wl,--wrap=__aeabi_frsub -Wl,--wrap=__aeabi_fsub -Wl,--wrap=__aeabi_i2d -Wl,--wrap=__aeabi_i2f -Wl,--wrap=__aeabi_idiv -Wl,--wrap=__aeabi_idivmod -Wl,--wrap=__aeabi_l2d -Wl,--wrap=__aeabi_l2f -Wl,--wrap=__aeabi_ldivmod -Wl,--wrap=__aeabi_lmul -Wl,--wrap=__aeabi_memcpy -Wl,--wrap=__aeabi_memcpy4 -Wl,--wrap=__aeabi_memcpy8 -Wl,--wrap=__aeabi_memset -Wl,--wrap=__aeabi_memset4 -Wl,--wrap=__aeabi_memset8 -Wl,--wrap=__aeabi_ui2d -Wl,--wrap=__aeabi_ui2f -Wl,--wrap=__aeabi_uidiv -Wl,--wrap=__aeabi_uidivmod -Wl,--wrap=__aeabi_ul2d -Wl,--wrap=__aeabi_ul2f -Wl,--wrap=__aeabi_uldivmod -Wl,--wrap=asin -Wl,--wrap=asinf -Wl,--wrap=asinh -Wl,--wrap=asinhf -Wl,--wrap=atan -Wl,--wrap=atan2 -Wl,--wrap=atan2f -Wl,--wrap=atanf -Wl,--wrap=atanh -Wl,--wrap=atanhf -Wl,--wrap=calloc -Wl,--wrap=cbrt -Wl,--wrap=cbrtf -Wl,--wrap=ceil -Wl,--wrap=ceilf -Wl,--wrap=__clz -Wl,--wrap=__clzdi2 -Wl,--wrap=__clzl -Wl,--wrap=__clzll -Wl,--wrap=__clzsi2 -Wl,--wrap=copysign -Wl,--wrap=copysignf -Wl,--wrap=cos -Wl,--wrap=cosf -Wl,--wrap=cosh -Wl,--wrap=coshf -Wl,--wrap=__ctzdi2 -Wl,--wrap=__ctzsi2 -Wl,--wrap=drem -Wl,--wrap=dremf -Wl,--wrap=exp -Wl,--wrap=exp10 -Wl,--wrap=exp10f -Wl,--wrap=exp2 -Wl,--wrap=exp2f -Wl,--wrap=expf -Wl,--wrap=expm1 -Wl,--wrap=expm1f -Wl,--wrap=floor -Wl,--wrap=floorf -Wl,--wrap=fma -Wl,--wrap=fmaf -Wl,--wrap=fmod -Wl,--wrap=fmodf -Wl,--wrap=free -Wl,--wrap=hypot -Wl,--wrap=hypotf -Wl,--wrap=ldexp -Wl,--wrap=ldexpf -Wl,--wrap=log -Wl,--wrap=log10 -Wl,--wrap=log10f -Wl,--wrap=log1p -Wl,--wrap=log1pf -Wl,--wrap=log2 -Wl,--wrap=log2f -Wl,--wrap=logf -Wl,--wrap=malloc -Wl,--wrap=memcpy -Wl,--wrap=memset -Wl,--wrap=__popcountdi2 -Wl,--wrap=__popcountsi2 -Wl,--wrap=pow -Wl,--wrap=powf -Wl,--wrap=powint -Wl,--wrap=powintf -Wl,--wrap=printf -Wl,--wrap=putchar -Wl,--wrap=puts -Wl,--wrap=remainder -Wl,--wrap=remainderf -Wl,--wrap=remquo -Wl,--wrap=remquof -Wl,--wrap=round -Wl,--wrap=roundf -Wl,--wrap=sin -Wl,--wrap=sincos -Wl,--wrap=sincosf -Wl,--wrap=sinf -Wl,--wrap=sinh -Wl,--wrap=sinhf -Wl,--wrap=snprintf -Wl,--wrap=sprintf -Wl,--wrap=sqrt -Wl,--wrap=sqrtf -Wl,--wrap=tan -Wl,--wrap=tanf -Wl,--wrap=tanh -Wl,--wrap=tanhf -Wl,--wrap=trunc -Wl,--wrap=truncf -Wl,--wrap=vprintf -Wl,--wrap=vsnprintf
|
||||
|
||||
compiler.c.cmd=arm-none-eabi-gcc
|
||||
compiler.c.flags=-c {compiler.defines} {compiler.flags} {compiler.includes}
|
||||
compiler.c.flags=-c {compiler.defines} {compiler.flags} {compiler.includes} -std=gnu17
|
||||
compiler.c.elf.cmd=arm-none-eabi-g++
|
||||
compiler.c.elf.flags={compiler.defines} {compiler.flags} -Os -Wl,--gc-sections
|
||||
compiler.S.cmd=arm-none-eabi-gcc
|
||||
compiler.S.flags=-c -g -x assembler-with-cpp -MMD {compiler.includes}
|
||||
compiler.cpp.cmd=arm-none-eabi-g++
|
||||
compiler.cpp.flags=-c {compiler.defines} {compiler.flags} {compiler.includes}
|
||||
compiler.cpp.flags=-c {compiler.defines} {compiler.flags} {compiler.includes} -std=gnu++17
|
||||
|
||||
|
||||
compiler.ar.cmd=arm-none-eabi-ar
|
||||
|
|
|
|||
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Reference in a new issue