83 lines
1.6 KiB
C
83 lines
1.6 KiB
C
#include "em_chip.h"
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#include "em_cmu.h"
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#include "em_emu.h"
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#include "em_core.h"
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#include "em_usart.h"
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#include "em_gpio.h"
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#include <stdio.h>
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#include <string.h>
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#include "app.h"
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#ifndef PRINTING_USE_VCOM
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int RETARGET_WriteChar(char c)
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{
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return ITM_SendChar(c);
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}
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int RETARGET_ReadChar(void)
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{
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return 0;
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}
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void setupSWOForPrint(void)
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{
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/* Enable GPIO clock. */
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CMU_ClockEnable(cmuClock_GPIO, true);
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/* Enable Serial wire output pin */
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GPIO->ROUTEPEN |= GPIO_ROUTEPEN_SWVPEN;
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/* Set location 0 */
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GPIO->ROUTELOC0 = GPIO_ROUTELOC0_SWVLOC_LOC0;
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/* Enable output on pin - GPIO Port F, Pin 2 */
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GPIO->P[5].MODEL &= ~(_GPIO_P_MODEL_MODE2_MASK);
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GPIO->P[5].MODEL |= GPIO_P_MODEL_MODE2_PUSHPULL;
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/* Enable debug clock AUXHFRCO */
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CMU_OscillatorEnable(cmuOsc_AUXHFRCO, true, true);
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CMU->OSCENCMD = CMU_OSCENCMD_AUXHFRCOEN;
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/* Wait until clock is ready */
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while (!(CMU->STATUS & CMU_STATUS_AUXHFRCORDY));
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/* Enable trace in core debug */
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CoreDebug->DEMCR |= CoreDebug_DEMCR_TRCENA_Msk;
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ITM->LAR = 0xC5ACCE55;
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ITM->TER = 0x0;
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ITM->TCR = 0x0;
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TPI->SPPR = 2;
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TPI->ACPR = 0x15; // changed from 0x0F on Giant, etc. to account for 19 MHz default AUXHFRCO frequency
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ITM->TPR = 0x0;
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DWT->CTRL = 0x400003FE;
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ITM->TCR = 0x0001000D;
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TPI->FFCR = 0x00000100;
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ITM->TER = 0x1;
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}
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void printing_init()
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{
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setupSWOForPrint();
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}
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#else
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int RETARGET_WriteChar(char c)
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{
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USART_Tx(USART0,c);
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return 0;
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}
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int RETARGET_ReadChar(void)
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{
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return 0;
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}
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void printing_init()
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{
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// GPIO_PinModeSet(gpioPortA,5,gpioModePushPull,1); // VCOM enable
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}
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#endif
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