- /*
- Copyright 2018 Massdrop Inc.
-
- 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 2 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 <http://www.gnu.org/licenses/>.
- */
-
- #include "printf.h"
- #include "sendchar.h"
-
- #ifdef CONSOLE_ENABLE
-
- # include "samd51j18a.h"
- # include "arm_atsam_protocol.h"
- # include <string.h>
- # include <stdarg.h>
-
- void console_printf(char *fmt, ...) {
- while (udi_hid_con_b_report_trans_ongoing) {
- } // Wait for any previous transfers to complete
-
- static char console_printbuf[CONSOLE_PRINTBUF_SIZE]; // Print and send buffer
- va_list va;
- int result;
-
- va_start(va, fmt);
- result = vsnprintf(console_printbuf, CONSOLE_PRINTBUF_SIZE, fmt, va);
- va_end(va);
-
- uint32_t irqflags;
- char * pconbuf = console_printbuf; // Pointer to start send from
- int send_out = CONSOLE_EPSIZE; // Bytes to send per transfer
-
- while (result > 0) { // While not error and bytes remain
- while (udi_hid_con_b_report_trans_ongoing) {
- } // Wait for any previous transfers to complete
-
- irqflags = __get_PRIMASK();
- __disable_irq();
- __DMB();
-
- if (result < CONSOLE_EPSIZE) { // If remaining bytes are less than console epsize
- memset(udi_hid_con_report, 0, CONSOLE_EPSIZE); // Clear the buffer
- send_out = result; // Send remaining size
- }
-
- memcpy(udi_hid_con_report, pconbuf, send_out); // Copy data into the send buffer
-
- udi_hid_con_b_report_valid = 1; // Set report valid
- udi_hid_con_send_report(); // Send report
-
- __DMB();
- __set_PRIMASK(irqflags);
-
- result -= send_out; // Decrement result by bytes sent
- pconbuf += send_out; // Increment buffer point by bytes sent
- }
- }
-
- #endif // CONSOLE_ENABLE
-
- void print_set_sendchar(sendchar_func_t send) {}
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