src/main/common/printf_serial.c

   1 /*
   2  * This file is part of Cleanflight and Betaflight.
   3  *
   4  * Cleanflight and Betaflight are free software. You can redistribute
   5  * this software and/or modify this software under the terms of the
   6  * GNU General Public License as published by the Free Software
   7  * Foundation, either version 3 of the License, or (at your option)
   8  * any later version.
   9  *
  10  * Cleanflight and Betaflight are distributed in the hope that they
  11  * will be useful, but WITHOUT ANY WARRANTY; without even the implied
  12  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  13  * See the GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this software.
  17  *
  18  * If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include <stdbool.h>
  22 #include <stdint.h>
  23 #include <stdarg.h>
  24 #include <stdlib.h>
  25
  26 #include "platform.h"
  27
  28 #include "common/printf.h"
  29
  30 #include "drivers/serial.h"
  31 #include "io/serial.h"
  32
  33 #include "printf_serial.h"
  34
  35 #if SERIAL_PORT_COUNT > 0
  36
  37 static serialPort_t *printfSerialPort;
  38
  39 void setPrintfSerialPort(serialPort_t *serialPort)
  40 {
  41     printfSerialPort = serialPort;
  42 }
  43
  44 #ifdef REQUIRE_CC_ARM_PRINTF_SUPPORT
  45
  46 int tfp_printf(const char *fmt, ...)
  47 {
  48     va_list va;
  49     va_start(va, fmt);
  50     int written = tfp_format(stdout_putp, stdout_putf, fmt, va);
  51     va_end(va);
  52     while (!isSerialTransmitBufferEmpty(printfSerialPort));
  53     return written;
  54 }
  55
  56 static void _putc(void *p, char c)
  57 {
  58     UNUSED(p);
  59     serialWrite(printfSerialPort, c);
  60 }
  61
  62 void printfSerialInit(void)
  63 {
  64     init_printf(NULL, _putc);
  65 }
  66
  67 #else // REQUIRE_CC_ARM_PRINTF_SUPPORT
  68
  69 // keil/armcc version
  70 int fputc(int c, FILE *f)
  71 {
  72     // let DMA catch up a bit when using set or dump, we're too fast.
  73     while (!isSerialTransmitBufferEmpty(printfSerialPort));
  74     serialWrite(printfSerialPort, c);
  75     return c;
  76 }
  77
  78 void printfSerialInit(void)
  79 {
  80     // Nothing to do
  81 }
  82 #endif
  83
  84 #endif // SERIAL_PORT_COUNT