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-
-
- #include "usb_dev.h"
- #include "usb_serial.h"
- #include "core_pins.h"
-
- #include <string.h> // for memcpy()
-
- #include "debug/printf.h"
- #include "core_pins.h"
-
-
- #if defined(CDC_STATUS_INTERFACE) && defined(CDC_DATA_INTERFACE)
-
-
- uint32_t usb_cdc_line_coding[2];
- volatile uint32_t usb_cdc_line_rtsdtr_millis;
- volatile uint8_t usb_cdc_line_rtsdtr=0;
- volatile uint8_t usb_cdc_transmit_flush_timer=0;
-
-
-
- static volatile uint8_t tx_noautoflush=0;
-
- #define TRANSMIT_FLUSH_TIMEOUT 5
-
-
-
- #define RX_NUM 3
- static transfer_t rx_transfer[RX_NUM] __attribute__ ((used, aligned(32)));
- static uint8_t rx_buffer[RX_NUM * 512];
- static uint16_t rx_count[RX_NUM];
- static uint16_t rx_index[RX_NUM];
-
- static void rx_event(transfer_t *t)
- {
- int len = 512 - ((t->status >> 16) & 0x7FFF);
- int index = t->callback_param;
- printf("rx event, len=%d, i=%d\n", len, index);
- rx_count[index] = len;
- rx_index[index] = 0;
- }
-
- void usb_serial_reset(void)
- {
- printf("usb_serial_reset\n");
-
- }
-
- void usb_serial_configure(void)
- {
- printf("usb_serial_configure\n");
- usb_config_tx(CDC_ACM_ENDPOINT, CDC_ACM_SIZE, 0, NULL);
- usb_config_rx(CDC_RX_ENDPOINT, CDC_RX_SIZE, 0, rx_event);
- usb_config_tx(CDC_TX_ENDPOINT, CDC_TX_SIZE, 0, NULL);
- usb_prepare_transfer(rx_transfer + 0, rx_buffer + 0, 512, 0);
- usb_receive(CDC_RX_ENDPOINT, rx_transfer + 0);
- }
-
-
-
- int usb_serial_getchar(void)
- {
- if (rx_index[0] < rx_count[0]) {
- int c = rx_buffer[rx_index[0]++];
- if (rx_index[0] >= rx_count[0]) {
-
- usb_prepare_transfer(rx_transfer + 0, rx_buffer + 0, 512, 0);
- usb_receive(CDC_RX_ENDPOINT, rx_transfer + 0);
- }
- return c;
- }
- #if 0
- unsigned int i;
- int c;
-
- if (!rx_packet) {
- if (!usb_configuration) return -1;
- rx_packet = usb_rx(CDC_RX_ENDPOINT);
- if (!rx_packet) return -1;
- }
- i = rx_packet->index;
- c = rx_packet->buf[i++];
- if (i >= rx_packet->len) {
- usb_free(rx_packet);
- rx_packet = NULL;
- } else {
- rx_packet->index = i;
- }
- return c;
- #endif
- return -1;
- }
-
-
- int usb_serial_peekchar(void)
- {
- #if 0
- if (!rx_packet) {
- if (!usb_configuration) return -1;
- rx_packet = usb_rx(CDC_RX_ENDPOINT);
- if (!rx_packet) return -1;
- }
- if (!rx_packet) return -1;
- return rx_packet->buf[rx_packet->index];
- #endif
- return -1;
- }
-
-
- int usb_serial_available(void)
- {
- return rx_count[0] - rx_index[0];
- #if 0
- int count;
- count = usb_rx_byte_count(CDC_RX_ENDPOINT);
- if (rx_packet) count += rx_packet->len - rx_packet->index;
- return count;
- #endif
- return 0;
- }
-
-
- int usb_serial_read(void *buffer, uint32_t size)
- {
- #if 0
- uint8_t *p = (uint8_t *)buffer;
- uint32_t qty, count=0;
-
- while (size) {
- if (!usb_configuration) break;
- if (!rx_packet) {
- rx:
- rx_packet = usb_rx(CDC_RX_ENDPOINT);
- if (!rx_packet) break;
- if (rx_packet->len == 0) {
- usb_free(rx_packet);
- goto rx;
- }
- }
- qty = rx_packet->len - rx_packet->index;
- if (qty > size) qty = size;
- memcpy(p, rx_packet->buf + rx_packet->index, qty);
- p += qty;
- count += qty;
- size -= qty;
- rx_packet->index += qty;
- if (rx_packet->index >= rx_packet->len) {
- usb_free(rx_packet);
- rx_packet = NULL;
- }
- }
- return count;
- #endif
- return 0;
- }
-
-
- void usb_serial_flush_input(void)
- {
- #if 0
- usb_packet_t *rx;
-
- if (!usb_configuration) return;
- if (rx_packet) {
- usb_free(rx_packet);
- rx_packet = NULL;
- }
- while (1) {
- rx = usb_rx(CDC_RX_ENDPOINT);
- if (!rx) break;
- usb_free(rx);
- }
- #endif
- }
-
-
-
-
-
-
-
- #define TX_TIMEOUT_MSEC 70
-
-
-
-
-
-
-
-
-
-
-
- int usb_serial_putchar(uint8_t c)
- {
- return usb_serial_write(&c, 1);
- }
-
-
- static transfer_t txtransfer __attribute__ ((used, aligned(32)));
- static uint8_t txbuffer[1024];
-
-
-
-
- int usb_serial_write(const void *buffer, uint32_t size)
- {
- if (!usb_configuration) return 0;
- if (size > sizeof(txbuffer)) size = sizeof(txbuffer);
- int count=0;
- while (1) {
- uint32_t status = usb_transfer_status(&txtransfer);
- if (count > 2000) {
- printf("status = %x\n", status);
-
- }
- if (!(status & 0x80)) break;
- count++;
-
-
- }
- memcpy(txbuffer, buffer, size);
- usb_prepare_transfer(&txtransfer, txbuffer, size, 0);
- usb_transmit(CDC_TX_ENDPOINT, &txtransfer);
-
- #if 0
- uint32_t ret = size;
- uint32_t len;
- uint32_t wait_count;
- const uint8_t *src = (const uint8_t *)buffer;
- uint8_t *dest;
-
- tx_noautoflush = 1;
- while (size > 0) {
- if (!tx_packet) {
- wait_count = 0;
- while (1) {
- if (!usb_configuration) {
- tx_noautoflush = 0;
- return -1;
- }
- if (usb_tx_packet_count(CDC_TX_ENDPOINT) < TX_PACKET_LIMIT) {
- tx_noautoflush = 1;
- tx_packet = usb_malloc();
- if (tx_packet) break;
- tx_noautoflush = 0;
- }
- if (++wait_count > TX_TIMEOUT || transmit_previous_timeout) {
- transmit_previous_timeout = 1;
- return -1;
- }
- yield();
- }
- }
- transmit_previous_timeout = 0;
- len = CDC_TX_SIZE - tx_packet->index;
- if (len > size) len = size;
- dest = tx_packet->buf + tx_packet->index;
- tx_packet->index += len;
- size -= len;
- while (len-- > 0) *dest++ = *src++;
- if (tx_packet->index >= CDC_TX_SIZE) {
- tx_packet->len = CDC_TX_SIZE;
- usb_tx(CDC_TX_ENDPOINT, tx_packet);
- tx_packet = NULL;
- }
- usb_cdc_transmit_flush_timer = TRANSMIT_FLUSH_TIMEOUT;
- }
- tx_noautoflush = 0;
- return ret;
- #endif
- return 0;
- }
-
- int usb_serial_write_buffer_free(void)
- {
- #if 0
- uint32_t len;
-
- tx_noautoflush = 1;
- if (!tx_packet) {
- if (!usb_configuration ||
- usb_tx_packet_count(CDC_TX_ENDPOINT) >= TX_PACKET_LIMIT ||
- (tx_packet = usb_malloc()) == NULL) {
- tx_noautoflush = 0;
- return 0;
- }
- }
- len = CDC_TX_SIZE - tx_packet->index;
-
-
-
-
-
-
-
- tx_noautoflush = 0;
- return len;
- #endif
- return 0;
- }
-
- void usb_serial_flush_output(void)
- {
- #if 0
- if (!usb_configuration) return;
- tx_noautoflush = 1;
- if (tx_packet) {
- usb_cdc_transmit_flush_timer = 0;
- tx_packet->len = tx_packet->index;
- usb_tx(CDC_TX_ENDPOINT, tx_packet);
- tx_packet = NULL;
- } else {
- usb_packet_t *tx = usb_malloc();
- if (tx) {
- usb_cdc_transmit_flush_timer = 0;
- usb_tx(CDC_TX_ENDPOINT, tx);
- } else {
- usb_cdc_transmit_flush_timer = 1;
- }
- }
- tx_noautoflush = 0;
- #endif
- }
-
- void usb_serial_flush_callback(void)
- {
- #if 0
- if (tx_noautoflush) return;
- if (tx_packet) {
- tx_packet->len = tx_packet->index;
- usb_tx(CDC_TX_ENDPOINT, tx_packet);
- tx_packet = NULL;
- } else {
- usb_packet_t *tx = usb_malloc();
- if (tx) {
- usb_tx(CDC_TX_ENDPOINT, tx);
- } else {
- usb_cdc_transmit_flush_timer = 1;
- }
- }
- #endif
- }
-
-
-
-
- #endif
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