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
  22 #include <stdbool.h>
  23 #include <stdint.h>
  24 #include <stdarg.h>
  25 #include <stdlib.h>
  26
  27 #include "platform.h"
  28
  29 #include "common/printf.h"
  30
  31 #include "drivers/serial.h"
  32 #include "io/serial.h"
  33
  34 #include "printf_serial.h"
  35
  36 #ifdef SERIAL_PORT_COUNT
  37
  38 static serialPort_t *printfSerialPort;
  39
  40 void setPrintfSerialPort(serialPort_t *serialPort)
  41 {
  42     printfSerialPort = serialPort;
  43 }
  44
  45 #ifdef REQUIRE_CC_ARM_PRINTF_SUPPORT
  46
  47 int tfp_printf(const char *fmt, ...)
  48 {
  49     va_list va;
  50     va_start(va, fmt);
  51     int written = tfp_format(stdout_putp, stdout_putf, fmt, va);
  52     va_end(va);
  53     while (!isSerialTransmitBufferEmpty(printfSerialPort));
  54     return written;
  55 }
  56
  57 static void _putc(void *p, char c)
  58 {
  59     UNUSED(p);
  60     serialWrite(printfSerialPort, c);
  61 }
  62
  63
  64 void printfSerialInit(void)
  65 {
  66     init_printf(NULL, _putc);
  67 }
  68
  69 #else // REQUIRE_CC_ARM_PRINTF_SUPPORT
  70
  71 // keil/armcc version
  72 int fputc(int c, FILE *f)
  73 {
  74     // let DMA catch up a bit when using set or dump, we're too fast.
  75     while (!isSerialTransmitBufferEmpty(printfSerialPort));
  76     serialWrite(printfSerialPort, c);
  77     return c;
  78 }
  79
  80 void printfSerialInit(void)
  81 {
  82     // Nothing to do
  83 }
  84 #endif
  85
  86 #endif // SERIAL_PORT_COUNT