# or omit it and provide it on the command line (make BOARD=foo).
BOARD=sensorwatch_green
+TINYUSB_CDC=1
+
# Leave this line here.
include $(GOSSAMER_PATH)/make.mk
# Add your include directories here.
INCLUDES += \
+ -I./tinyusb/src \
-I./watch-library/shared/watch \
+ -I./watch-library/hardware/watch \
# Add your source files here.
SRCS += \
+ ./watch-library/hardware/watch/watch.c \
./watch-library/hardware/watch/watch_adc.c \
./watch-library/hardware/watch/watch_extint.c \
./watch-library/hardware/watch/watch_gpio.c \
+ ./watch-library/hardware/watch/watch_private.c \
./watch-library/hardware/watch/watch_rtc.c \
./watch-library/hardware/watch/watch_slcd.c \
./watch-library/shared/watch/watch_common_display.c \
./watch-library/hardware/watch/watch_tcc.c \
+ ./watch-library/hardware/watch/watch_usb_descriptors.c \
+ ./watch-library/hardware/watch/watch_usb_cdc.c \
./app.c \
# Finally, leave this line at the bottom of the file.
#include <stdio.h>
#include "app.h"
#include "watch.h"
+#include "watch_private.h"
#include "delay.h"
+#include "usb.h"
+#include "tusb.h"
+#include "watch_usb_cdc.h"
+
+void yield(void) {
+ tud_task();
+ cdc_task();
+}
void app_init(void) {
+ // perform watch initialization first!
+ _watch_init();
+
+ // check if we are plugged into USB power.
+ HAL_GPIO_VBUS_DET_in();
+ HAL_GPIO_VBUS_DET_pulldown();
+ if (HAL_GPIO_VBUS_DET_read()){
+ /// if so, enable USB functionality.
+ _watch_enable_usb();
+ }
+ HAL_GPIO_VBUS_DET_off();
}
void app_setup(void) {
char buf[7];
snprintf(buf, 7, "%6d", vcc);
watch_display_main_line(buf);
+ printf("VCC: %d\n", vcc);
+
+ if (usb_is_enabled()) {
+ yield();
+ }
return false;
}
\ No newline at end of file
*/
#include "watch_private.h"
-#include "watch_private_cdc.h"
-#include "watch_utility.h"
-#include "tusb.h"
+#include "adc.h"
+#include "tcc.h"
+#include "tc.h"
+#include "usb.h"
+#include "system.h"
void _watch_init(void) {
- // disable the LED pin (it may have been enabled by the bootloader)
- watch_disable_digital_output(GPIO(GPIO_PORTA, 20));
+ // set frequency to 4 MHz
+ set_cpu_frequency(4000000);
// disable debugger hot-plugging
HAL_GPIO_SWCLK_pmuxdis();
return 0;
}
-void _watch_enable_tc0(void) {
- // before we init TinyUSB, we are going to need a periodic callback to handle TinyUSB tasks.
- // TC2 and TC3 are reserved for devices on the 9-pin connector, so let's use TC0.
- // clock TC0 with the 8 MHz clock on GCLK0.
- hri_gclk_write_PCHCTRL_reg(GCLK, TC0_GCLK_ID, GCLK_PCHCTRL_GEN_GCLK0_Val | GCLK_PCHCTRL_CHEN);
- // and enable the peripheral clock.
- hri_mclk_set_APBCMASK_TC0_bit(MCLK);
- // disable and reset TC0.
- hri_tc_clear_CTRLA_ENABLE_bit(TC0);
- hri_tc_wait_for_sync(TC0, TC_SYNCBUSY_ENABLE);
- hri_tc_write_CTRLA_reg(TC0, TC_CTRLA_SWRST);
- hri_tc_wait_for_sync(TC0, TC_SYNCBUSY_SWRST);
- hri_tc_write_CTRLA_reg(TC0, TC_CTRLA_PRESCALER_DIV1024 | // divide the 8 MHz clock by 1024 to count at 7812.5 Hz
- TC_CTRLA_MODE_COUNT8 | // count in 8-bit mode
- TC_CTRLA_RUNSTDBY); // run in standby, just in case we figure that out
- hri_tccount8_write_PER_reg(TC0, 10); // 7812.5 Hz / 10 = 781.125 Hz
- // set an interrupt on overflow; this will call TC0_Handler below.
- hri_tc_set_INTEN_OVF_bit(TC0);
-
- // set priority higher than TC1
- NVIC_SetPriority(TC0_IRQn, 5);
- NVIC_ClearPendingIRQ(TC0_IRQn);
- NVIC_EnableIRQ(TC0_IRQn);
-
- // Start the timer
- hri_tc_set_CTRLA_ENABLE_bit(TC0);
-}
-
-void _watch_disable_tc0(void) {
- NVIC_DisableIRQ(TC0_IRQn);
- NVIC_ClearPendingIRQ(TC0_IRQn);
- hri_tc_clear_CTRLA_ENABLE_bit(TC0);
- hri_tc_wait_for_sync(TC0, TC_SYNCBUSY_ENABLE);
- hri_tc_write_CTRLA_reg(TC0, TC_CTRLA_SWRST);
- hri_tc_wait_for_sync(TC0, TC_SYNCBUSY_SWRST);
-}
-
-void _watch_enable_tc1(void) {
- hri_gclk_write_PCHCTRL_reg(GCLK, TC1_GCLK_ID, GCLK_PCHCTRL_GEN_GCLK0_Val | GCLK_PCHCTRL_CHEN);
- // and enable the peripheral clock.
- hri_mclk_set_APBCMASK_TC1_bit(MCLK);
- // disable and reset TC1.
- hri_tc_clear_CTRLA_ENABLE_bit(TC1);
- hri_tc_wait_for_sync(TC1, TC_SYNCBUSY_ENABLE);
- hri_tc_write_CTRLA_reg(TC1, TC_CTRLA_SWRST);
- hri_tc_wait_for_sync(TC1, TC_SYNCBUSY_SWRST);
- hri_tc_write_CTRLA_reg(TC1, TC_CTRLA_PRESCALER_DIV1024 | // divide the 8 MHz clock by 1024 to count at 7812.5 Hz
- TC_CTRLA_MODE_COUNT8 | // count in 8-bit mode
- TC_CTRLA_RUNSTDBY); // run in standby, just in case we figure that out
- hri_tccount8_write_PER_reg(TC1, 20); // 7812.5 Hz / 50 = 156.25 Hz
- // set an interrupt on overflow; this will call TC1_Handler below.
- hri_tc_set_INTEN_OVF_bit(TC1);
-
- // set priority lower than TC0
- NVIC_SetPriority(TC1_IRQn, 6);
- NVIC_ClearPendingIRQ(TC1_IRQn);
- NVIC_EnableIRQ(TC1_IRQn);
-
- // Start the timer
- hri_tc_set_CTRLA_ENABLE_bit(TC1);
-}
-
-void _watch_disable_tc1(void) {
- NVIC_DisableIRQ(TC1_IRQn);
- NVIC_ClearPendingIRQ(TC1_IRQn);
- hri_tc_clear_CTRLA_ENABLE_bit(TC1);
- hri_tc_wait_for_sync(TC1, TC_SYNCBUSY_ENABLE);
- hri_tc_write_CTRLA_reg(TC1, TC_CTRLA_SWRST);
- hri_tc_wait_for_sync(TC1, TC_SYNCBUSY_SWRST);
-}
-
-void TC0_Handler(void) {
- tud_task();
- TC0->COUNT8.INTFLAG.reg |= TC_INTFLAG_OVF;
-}
-
-void TC1_Handler(void) {
- cdc_task();
- TC1->COUNT8.INTFLAG.reg |= TC_INTFLAG_OVF;
-}
void _watch_enable_usb(void) {
- // disable USB, just in case.
- hri_usb_clear_CTRLA_ENABLE_bit(USB);
-
- // bump clock up to 8 MHz
- hri_oscctrl_write_OSC16MCTRL_FSEL_bf(OSCCTRL, OSCCTRL_OSC16MCTRL_FSEL_8_Val);
-
- // reset flags and disable DFLL
- OSCCTRL->INTFLAG.reg = OSCCTRL_INTFLAG_DFLLRDY;
- OSCCTRL->DFLLCTRL.reg = 0;
- while (!(OSCCTRL->STATUS.reg & OSCCTRL_STATUS_DFLLRDY));
-
- // set the coarse and fine values to speed up frequency lock.
- uint32_t coarse =(*((uint32_t *)NVMCTRL_OTP5)) >> 26;
- OSCCTRL->DFLLVAL.reg = OSCCTRL_DFLLVAL_COARSE(coarse) |
- OSCCTRL_DFLLVAL_FINE(0x200);
- // set coarse and fine steps, and multiplier (48 MHz = 32768 Hz * 1465)
- OSCCTRL->DFLLMUL.reg = OSCCTRL_DFLLMUL_CSTEP( 1 ) |
- OSCCTRL_DFLLMUL_FSTEP( 1 ) |
- OSCCTRL_DFLLMUL_MUL( 1465 );
- // set closed loop mode, chill cycle disable and USB clock recovery mode, and enable the DFLL.
- OSCCTRL->DFLLCTRL.reg = OSCCTRL_DFLLCTRL_MODE | OSCCTRL_DFLLCTRL_CCDIS | OSCCTRL_DFLLCTRL_ONDEMAND | OSCCTRL_DFLLCTRL_RUNSTDBY | OSCCTRL_DFLLCTRL_USBCRM | OSCCTRL_DFLLCTRL_ENABLE;
- while (!(OSCCTRL->STATUS.reg & OSCCTRL_STATUS_DFLLRDY));
-
- // assign DFLL to GCLK1
- GCLK->GENCTRL[1].reg = GCLK_GENCTRL_SRC(GCLK_GENCTRL_SRC_DFLL48M) | GCLK_GENCTRL_DIV(1) | GCLK_GENCTRL_GENEN;// | GCLK_GENCTRL_OE;
- while (GCLK->SYNCBUSY.bit.GENCTRL1); // wait for generator control 1 to sync
-
- // assign GCLK1 to USB
- hri_gclk_write_PCHCTRL_reg(GCLK, USB_GCLK_ID, GCLK_PCHCTRL_GEN_GCLK1_Val | GCLK_PCHCTRL_CHEN);
- hri_mclk_set_AHBMASK_USB_bit(MCLK);
- hri_mclk_set_APBBMASK_USB_bit(MCLK);
-
- // USB Pin Init
- gpio_set_pin_direction(PIN_PA24, GPIO_DIRECTION_OUT);
- gpio_set_pin_level(PIN_PA24, false);
- gpio_set_pin_pull_mode(PIN_PA24, GPIO_PULL_OFF);
- gpio_set_pin_direction(PIN_PA25, GPIO_DIRECTION_OUT);
- gpio_set_pin_level(PIN_PA25, false);
- gpio_set_pin_pull_mode(PIN_PA25, GPIO_PULL_OFF);
-
- gpio_set_pin_function(PIN_PA24, PINMUX_PA24G_USB_DM);
- gpio_set_pin_function(PIN_PA25, PINMUX_PA25G_USB_DP);
-
- _watch_enable_tc0();
-
- tusb_init();
-
- _watch_enable_tc1();
-}
-
-void USB_Handler(void) {
- tud_int_handler(0);
-}
-
-// USB Descriptors and tinyUSB callbacks follow.
-
-/*
- * The MIT License (MIT)
- *
- * Copyright (c) 2019 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.
- *
- */
-
-//--------------------------------------------------------------------+
-// Device Descriptors
-//--------------------------------------------------------------------+
-tusb_desc_device_t const desc_device =
-{
- .bLength = sizeof(tusb_desc_device_t),
- .bDescriptorType = TUSB_DESC_DEVICE,
- .bcdUSB = 0x0200,
-
- // Use Interface Association Descriptor (IAD) for CDC
- // As required by USB Specs IAD's subclass must be common class (2) and protocol must be IAD (1)
- .bDeviceClass = TUSB_CLASS_MISC,
- .bDeviceSubClass = MISC_SUBCLASS_COMMON,
- .bDeviceProtocol = MISC_PROTOCOL_IAD,
-
- .bMaxPacketSize0 = CFG_TUD_ENDPOINT0_SIZE,
-
- .idVendor = 0x1209,
- .idProduct = 0x2151,
- .bcdDevice = 0x0100,
-
- .iManufacturer = 0x01,
- .iProduct = 0x02,
- .iSerialNumber = 0x03,
-
- .bNumConfigurations = 0x01
-};
-
-// Invoked when received GET DEVICE DESCRIPTOR
-// Application return pointer to descriptor
-uint8_t const * tud_descriptor_device_cb(void) {
- return (uint8_t const *) &desc_device;
-}
-
-//--------------------------------------------------------------------+
-// Configuration Descriptor
-//--------------------------------------------------------------------+
-
-enum {
- ITF_NUM_CDC = 0,
- ITF_NUM_CDC_DATA,
- ITF_NUM_TOTAL
-};
-
-#define CONFIG_TOTAL_LEN (TUD_CONFIG_DESC_LEN + TUD_CDC_DESC_LEN)
-
-#define EPNUM_CDC_NOTIF 0x81
-#define EPNUM_CDC_OUT 0x02
-#define EPNUM_CDC_IN 0x82
-
-
-uint8_t const desc_fs_configuration[] = {
- // Config number, interface count, string index, total length, attribute, power in mA
- TUD_CONFIG_DESCRIPTOR(1, ITF_NUM_TOTAL, 0, CONFIG_TOTAL_LEN, TUSB_DESC_CONFIG_ATT_REMOTE_WAKEUP, 100),
-
- // Interface number, string index, EP notification address and size, EP data address (out, in) and size.
- TUD_CDC_DESCRIPTOR(ITF_NUM_CDC, 4, EPNUM_CDC_NOTIF, 8, EPNUM_CDC_OUT, EPNUM_CDC_IN, 64),
-};
-
-// Invoked when received GET CONFIGURATION DESCRIPTOR
-// Application return pointer to descriptor
-// Descriptor contents must exist long enough for transfer to complete
-uint8_t const * tud_descriptor_configuration_cb(uint8_t index) {
- (void) index; // for multiple configurations
- return desc_fs_configuration;
-}
-
-//--------------------------------------------------------------------+
-// String Descriptors
-//--------------------------------------------------------------------+
-
-// array of pointer to string descriptors
-char const* string_desc_arr [] =
-{
- (const char[]) { 0x09, 0x04 }, // 0: is supported language is English (0x0409)
- "TinyUSB", // 1: Manufacturer
- "TinyUSB Device", // 2: Product
- "123456", // 3: Serials, should use chip ID
- "TinyUSB CDC", // 4: CDC Interface
-};
-
-static uint16_t _desc_str[32];
-
-// Invoked when received GET STRING DESCRIPTOR request
-// Application return pointer to descriptor, whose contents must exist long enough for transfer to complete
-uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid)
-{
- (void) langid;
-
- uint8_t chr_count;
-
- if ( index == 0) {
- memcpy(&_desc_str[1], string_desc_arr[0], 2);
- chr_count = 1;
- } else {
- // Note: the 0xEE index string is a Microsoft OS 1.0 Descriptors.
- // https://docs.microsoft.com/en-us/windows-hardware/drivers/usbcon/microsoft-defined-usb-descriptors
-
- if ( !(index < sizeof(string_desc_arr)/sizeof(string_desc_arr[0])) ) return NULL;
-
- const char* str = string_desc_arr[index];
-
- // Cap at max char
- chr_count = strlen(str);
- if ( chr_count > 31 ) chr_count = 31;
-
- // Convert ASCII string into UTF-16
- for(uint8_t i=0; i<chr_count; i++)
- {
- _desc_str[1+i] = str[i];
- }
- }
-
- // first byte is length (including header), second byte is string type
- _desc_str[0] = (TUSB_DESC_STRING << 8 ) | (2*chr_count + 2);
-
- return _desc_str;
+ set_cpu_frequency(8000000);
+ usb_init();
+ usb_enable();
}
void watch_reset_to_bootloader(void) {
+++ /dev/null
-/*
- * MIT License
- *
- * Copyright (c) 2020 Joey Castillo
- * Copyright (c) 2023 Edward Shin
- *
- * 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.
- */
-
-#include "watch_private_cdc.h"
-
-#include <stddef.h>
-
-#include "watch_utility.h"
-#include "tusb.h"
-
-/*
- * Implement a circular buffer for the USB CDC Serial read buffer.
- * The size of the buffer must be a power of two for this circular buffer
- * implementation to work.
- */
-
-// Size of the circular buffer. Must be a power of two.
-#define CDC_WRITE_BUF_SZ (1024)
-// Macro function to perform modular arithmetic on an index.
-// eg. (63 + 2) & (64 - 1) -> 1
-#define CDC_WRITE_BUF_IDX(x) ((x) & (CDC_WRITE_BUF_SZ - 1))
-static char s_write_buf[CDC_WRITE_BUF_SZ] = {0};
-static size_t s_write_buf_pos = 0;
-static size_t s_write_buf_len = 0;
-
-#define CDC_READ_BUF_SZ (256)
-#define CDC_READ_BUF_IDX(x) ((x) & (CDC_READ_BUF_SZ - 1))
-static char s_read_buf[CDC_READ_BUF_SZ] = {0};
-static size_t s_read_buf_pos = 0;
-static size_t s_read_buf_len = 0;
-
-// Mask TC1 interrupts, preventing calls to cdc_task()
-static inline void prv_critical_section_enter(void) {
- NVIC_DisableIRQ(TC1_IRQn);
-}
-
-// Unmask TC1 interrupts, allowing calls to cdc_task()
-static inline void prv_critical_section_exit(void) {
- NVIC_EnableIRQ(TC1_IRQn);
-}
-
-int _write(int file, char *ptr, int len) {
- (void) file;
-
- if (ptr == NULL || len <= 0) {
- return -1;
- }
-
- int bytes_written = 0;
-
- prv_critical_section_enter();
-
- for (int i = 0; i < len; i++) {
- s_write_buf[s_write_buf_pos] = ptr[i];
- s_write_buf_pos = CDC_WRITE_BUF_IDX(s_write_buf_pos + 1);
- if (s_write_buf_len < CDC_WRITE_BUF_SZ) {
- s_write_buf_len++;
- }
- bytes_written++;
- }
-
- prv_critical_section_exit();
-
- return bytes_written;
-}
-
-int _read(int file, char *ptr, int len) {
- (void) file;
-
- prv_critical_section_enter();
-
- if (ptr == NULL || len <= 0 || s_read_buf_len == 0) {
- prv_critical_section_exit();
- return -1;
- }
-
- // Clamp to the length of the read buffer
- if ((size_t) len > s_read_buf_len) {
- len = s_read_buf_len;
- }
-
- // Calculate the start of the circular buffer, and iterate from there
- const size_t start_pos = CDC_READ_BUF_IDX(s_read_buf_pos - len);
- for (size_t i = 0; i < (size_t) len; i++) {
- const size_t idx = CDC_READ_BUF_IDX(start_pos + i);
- ptr[i] = s_read_buf[idx];
- s_read_buf[idx] = 0;
- }
-
- // Update circular buffer position and length
- s_read_buf_len -= len;
- s_read_buf_pos = CDC_READ_BUF_IDX(s_read_buf_pos - len);
-
- prv_critical_section_exit();
-
- return len;
-}
-
-static void prv_handle_reads(void) {
- while (tud_cdc_available()) {
- int c = tud_cdc_read_char();
- if (c < 0) {
- continue;
- }
- s_read_buf[s_read_buf_pos] = c;
- s_read_buf_pos = CDC_READ_BUF_IDX(s_read_buf_pos + 1);
- if (s_read_buf_len < CDC_READ_BUF_SZ) {
- s_read_buf_len++;
- }
- }
-}
-
-static void prv_handle_writes(void) {
- if (s_write_buf_len > 0) {
- const size_t start_pos =
- CDC_WRITE_BUF_IDX(s_write_buf_pos - s_write_buf_len);
- for (size_t i = 0; i < (size_t) s_write_buf_len; i++) {
- const size_t idx = CDC_WRITE_BUF_IDX(start_pos + i);
- if (tud_cdc_available() > 0) {
- // If we receive data while doing a large write, we need to
- // fully service it before continuing to write, or the
- // stack will crash.
- prv_handle_reads();
- }
- if (tud_cdc_write_available()) {
- tud_cdc_write(&s_write_buf[idx], 1);
- }
- s_write_buf[idx] = 0;
- s_write_buf_len--;
- }
- tud_cdc_write_flush();
- }
-}
-
-void cdc_task(void) {
- prv_handle_reads();
- prv_handle_writes();
-}
+++ /dev/null
-/*
- * MIT License
- *
- * Copyright (c) 2020 Joey Castillo
- * Copyright (c) 2023 Edward Shin
- *
- * 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.
- */
-
-#ifndef _WATCH_PRIVATE_CDC_H_INCLUDED
-#define _WATCH_PRIVATE_CDC_H_INCLUDED
-
-int _write(int file, char *ptr, int len);
-int _read(int file, char *ptr, int len);
-void cdc_task(void);
-
-#endif
--- /dev/null
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 Joey Castillo
+ * Copyright (c) 2023 Edward Shin
+ *
+ * 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.
+ */
+
+#include <stddef.h>
+#include "watch_usb_cdc.h"
+#include "tusb.h"
+
+/*
+ * Implement a circular buffer for the USB CDC Serial read buffer.
+ * The size of the buffer must be a power of two for this circular buffer
+ * implementation to work.
+ */
+
+// Size of the circular buffer. Must be a power of two.
+#define CDC_WRITE_BUF_SZ (1024)
+// Macro function to perform modular arithmetic on an index.
+// eg. (63 + 2) & (64 - 1) -> 1
+#define CDC_WRITE_BUF_IDX(x) ((x) & (CDC_WRITE_BUF_SZ - 1))
+static char s_write_buf[CDC_WRITE_BUF_SZ] = {0};
+static size_t s_write_buf_pos = 0;
+static size_t s_write_buf_len = 0;
+
+#define CDC_READ_BUF_SZ (256)
+#define CDC_READ_BUF_IDX(x) ((x) & (CDC_READ_BUF_SZ - 1))
+static char s_read_buf[CDC_READ_BUF_SZ] = {0};
+static size_t s_read_buf_pos = 0;
+static size_t s_read_buf_len = 0;
+
+int _write(int file, char *ptr, int len) {
+ (void) file;
+
+ if (ptr == NULL || len <= 0) {
+ return -1;
+ }
+
+ int bytes_written = 0;
+
+ for (int i = 0; i < len; i++) {
+ s_write_buf[s_write_buf_pos] = ptr[i];
+ s_write_buf_pos = CDC_WRITE_BUF_IDX(s_write_buf_pos + 1);
+ if (s_write_buf_len < CDC_WRITE_BUF_SZ) {
+ s_write_buf_len++;
+ }
+ bytes_written++;
+ }
+
+ return bytes_written;
+}
+
+int _read(int file, char *ptr, int len) {
+ (void) file;
+
+ if (ptr == NULL || len <= 0 || s_read_buf_len == 0) {
+ return -1;
+ }
+
+ // Clamp to the length of the read buffer
+ if ((size_t) len > s_read_buf_len) {
+ len = s_read_buf_len;
+ }
+
+ // Calculate the start of the circular buffer, and iterate from there
+ const size_t start_pos = CDC_READ_BUF_IDX(s_read_buf_pos - len);
+ for (size_t i = 0; i < (size_t) len; i++) {
+ const size_t idx = CDC_READ_BUF_IDX(start_pos + i);
+ ptr[i] = s_read_buf[idx];
+ s_read_buf[idx] = 0;
+ }
+
+ // Update circular buffer position and length
+ s_read_buf_len -= len;
+ s_read_buf_pos = CDC_READ_BUF_IDX(s_read_buf_pos - len);
+
+ return len;
+}
+
+static void prv_handle_reads(void) {
+ while (tud_cdc_available()) {
+ int c = tud_cdc_read_char();
+ if (c < 0) {
+ continue;
+ }
+ s_read_buf[s_read_buf_pos] = c;
+ s_read_buf_pos = CDC_READ_BUF_IDX(s_read_buf_pos + 1);
+ if (s_read_buf_len < CDC_READ_BUF_SZ) {
+ s_read_buf_len++;
+ }
+ }
+}
+
+static void prv_handle_writes(void) {
+ if (s_write_buf_len > 0) {
+ const size_t start_pos =
+ CDC_WRITE_BUF_IDX(s_write_buf_pos - s_write_buf_len);
+ for (size_t i = 0; i < (size_t) s_write_buf_len; i++) {
+ const size_t idx = CDC_WRITE_BUF_IDX(start_pos + i);
+ if (tud_cdc_available() > 0) {
+ // If we receive data while doing a large write, we need to
+ // fully service it before continuing to write, or the
+ // stack will crash.
+ prv_handle_reads();
+ }
+ if (tud_cdc_write_available()) {
+ tud_cdc_write(&s_write_buf[idx], 1);
+ }
+ s_write_buf[idx] = 0;
+ s_write_buf_len--;
+ }
+ tud_cdc_write_flush();
+ }
+}
+
+void cdc_task(void) {
+ prv_handle_reads();
+ prv_handle_writes();
+}
--- /dev/null
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 Joey Castillo
+ * Copyright (c) 2023 Edward Shin
+ *
+ * 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.
+ */
+
+#pragma once
+
+int _write(int file, char *ptr, int len);
+int _read(int file, char *ptr, int len);
+void cdc_task(void);
--- /dev/null
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019 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.
+ *
+ */
+
+#include "tusb.h"
+
+//--------------------------------------------------------------------+
+// Device Descriptors
+//--------------------------------------------------------------------+
+tusb_desc_device_t const desc_device = {
+ .bLength = sizeof(tusb_desc_device_t),
+ .bDescriptorType = TUSB_DESC_DEVICE,
+ .bcdUSB = 0x0200,
+
+ // Use Interface Association Descriptor (IAD) for CDC
+ // As required by USB Specs IAD's subclass must be common class (2) and protocol must be IAD (1)
+ .bDeviceClass = TUSB_CLASS_MISC,
+ .bDeviceSubClass = MISC_SUBCLASS_COMMON,
+ .bDeviceProtocol = MISC_PROTOCOL_IAD,
+
+ .bMaxPacketSize0 = CFG_TUD_ENDPOINT0_SIZE,
+
+ .idVendor = 0x1209,
+ .idProduct = 0x2151,
+ .bcdDevice = 0x0100,
+
+ .iManufacturer = 0x01,
+ .iProduct = 0x02,
+ .iSerialNumber = 0x03,
+
+ .bNumConfigurations = 0x01
+};
+
+// Invoked when received GET DEVICE DESCRIPTOR
+// Application return pointer to descriptor
+uint8_t const * tud_descriptor_device_cb(void) {
+ return (uint8_t const *) &desc_device;
+}
+
+//--------------------------------------------------------------------+
+// Configuration Descriptor
+//--------------------------------------------------------------------+
+
+enum {
+ ITF_NUM_CDC = 0,
+ ITF_NUM_CDC_DATA,
+ ITF_NUM_TOTAL
+};
+
+#define CONFIG_TOTAL_LEN (TUD_CONFIG_DESC_LEN + TUD_CDC_DESC_LEN)
+
+#define EPNUM_CDC_NOTIF 0x81
+#define EPNUM_CDC_OUT 0x02
+#define EPNUM_CDC_IN 0x82
+
+uint8_t const desc_fs_configuration[] = {
+ // Config number, interface count, string index, total length, attribute, power in mA
+ TUD_CONFIG_DESCRIPTOR(1, ITF_NUM_TOTAL, 0, CONFIG_TOTAL_LEN, TUSB_DESC_CONFIG_ATT_REMOTE_WAKEUP, 100),
+
+ // Interface number, string index, EP notification address and size, EP data address (out, in) and size.
+ TUD_CDC_DESCRIPTOR(ITF_NUM_CDC, 4, EPNUM_CDC_NOTIF, 8, EPNUM_CDC_OUT, EPNUM_CDC_IN, 64),
+};
+
+// Invoked when received GET CONFIGURATION DESCRIPTOR
+// Application return pointer to descriptor
+// Descriptor contents must exist long enough for transfer to complete
+uint8_t const * tud_descriptor_configuration_cb(uint8_t index) {
+ (void) index; // for multiple configurations
+ return desc_fs_configuration;
+}
+
+//--------------------------------------------------------------------+
+// String Descriptors
+//--------------------------------------------------------------------+
+
+static char serialnum[32 * 2 + 1] = {'\0'}; // 2 chars per hexnumber + '\0'
+
+// array of pointer to string descriptors
+char const* string_desc_arr [] = {
+ (const char[]) { 0x09, 0x04 }, // 0: is supported language is English (0x0409)
+ "Oddly Specific Objects", // 1: Manufacturer
+ "Sensor Watch", // 2: Product
+ serialnum, // 3: Serial number
+ "TinyUSB CDC", // 4: CDC Interface
+};
+
+static uint16_t _desc_str[32];
+static bool serial_number_written = false;
+
+// Invoked when received GET STRING DESCRIPTOR request
+// Application return pointer to descriptor, whose contents must exist long enough for transfer to complete
+uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid) {
+ (void) langid;
+ uint8_t chr_count;
+
+ if (!serial_number_written) {
+ // Generate serial number based on chip unique ID
+ uint32_t chipid[4];
+ chipid[0] = *((uint32_t *)0x0080A00C);
+ chipid[1] = *((uint32_t *)0x0080A040);
+ chipid[2] = *((uint32_t *)0x0080A044);
+ chipid[3] = *((uint32_t *)0x0080A048);
+
+ sprintf(serialnum, "%08lX%08lX%08lX%08lX", chipid[0], chipid[1], chipid[2], chipid[3]);
+ serial_number_written = true;
+ }
+
+ if (index == 0) {
+ memcpy(&_desc_str[1], string_desc_arr[0], 2);
+ chr_count = 1;
+ } else {
+ // Note: the 0xEE index string is a Microsoft OS 1.0 Descriptors.
+ // https://docs.microsoft.com/en-us/windows-hardware/drivers/usbcon/microsoft-defined-usb-descriptors
+
+ if ( !(index < sizeof(string_desc_arr)/sizeof(string_desc_arr[0])) ) return NULL;
+
+ const char* str = string_desc_arr[index];
+
+ // Cap at max char
+ chr_count = strlen(str);
+ if ( chr_count > 31 ) chr_count = 31;
+
+ // Convert ASCII string into UTF-16
+ for(uint8_t i=0; i<chr_count; i++) {
+ _desc_str[1+i] = str[i];
+ }
+ }
+
+ // first byte is length (including header), second byte is string type
+ _desc_str[0] = (TUSB_DESC_STRING << 8 ) | (2*chr_count + 2);
+
+ return _desc_str;
+}
*/
void watch_reset_to_bootloader(void);
-/** @brief Call periodically from app main loop to service CDC RX/TX.
- */
-void cdc_task(void);
-
-/** @brief Reads up to len bytes from the USB serial.
- * @param file ignored, you can pass in 0
- * @param ptr pointer to a buffer of at least len bytes
- * @param len the number of bytes you wish to read, max 256.
- * @return The number of bytes read, or zero if no bytes were read.
- */
-int read(int file, char *ptr, int len);
-
/** @brief Disables the TRNG twice in order to work around silicon erratum 1.16.1.
* FIXME: find a better place for this, a couple of watch faces need it.
*/
/// Called by main.c while setting up the app. You should not call this from your app.
void _watch_init(void);
-/// Called by buzzer and LED teardown functions. You should not call this from your app.
-void _watch_disable_tcc(void);
-
-/// Enable USB task timer. Called by USB enable routine in main(). You should not call this from your app.
-void _watch_enable_tc0(void);
-
-/// Disable USB task timer. You should not call this from your app.
-void _watch_disable_tc0(void);
-
-/// Enable CDC task timer. Called by USB enable routine in main(). You should not call this from your app.
-void _watch_enable_tc1(void);
-
-/// Disable CDC task timer. You should not call this from your app.
-void _watch_disable_tc1(void);
-
/// Called by main.c if plugged in to USB. You should not call this from your app.
void _watch_enable_usb(void);
projects / sensor-watch.git / commitdiff