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Reconfigure System I/O when using USART1

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Frank Benkert 2015-10-20 05:58:34 +08:00 committed by Gregory Nutt
parent 78669f20f2
commit 4ac10f53d7
1 changed files with 8 additions and 0 deletions
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8
arch/arm/src/samv7/sam_lowputc.c
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@ -54,6 +54,7 @@
#include "chip/sam_uart.h"
#include "chip/sam_pinmap.h"
#include "chip/sam_matrix.h"
/****************************************************************************
* Pre-processor Definitions
@ -353,6 +354,13 @@ void sam_lowsetup(void)
#ifdef CONFIG_USART1_IFLOWCONTROL
(void)sam_configgpio(GPIO_USART1_RTS);
#endif
/* To use the USART1 as an USART, the SYSIO Pin4 must be bound to PB4
* instead of TDI
*/
uint32_t sysioreg = getreg32(SAM_MATRIX_CCFG_SYSIO);
sysioreg |= MATRIX_CCFG_SYSIO_SYSIO4;
putreg32(sysioreg, SAM_MATRIX_CCFG_SYSIO);
#endif
#ifdef CONFIG_SAMV7_USART2