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SAMD20: Fix some confusion what which pins are on which connectors

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This commit is contained in:
Gregory Nutt 2014-02-17 14:52:14 -06:00
parent aa3d338c0f
commit 76f80b74ae
3 changed files with 29 additions and 11 deletions
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9
configs/samd20-xplained/Kconfig
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@ -63,11 +63,18 @@ config SAMD20_XPLAINED_USART4_EXT1
Select this option if the serial console is on SERCOM4 connected via
EXT1. The RX will be on PB9 and TX signal will be on PB8.
config SAMD20_XPLAINED_USART4_EXT2
bool "EXT2"
depends on !SAMD20_XPLAINED_OLED1MODULE_EXT2 && !SAMD20_XPLAINED_IOMODULE_EXT2
---help---
Select this option if the serial console is on SERCOM4 connected via
EXT2. The RX will be on PB13 and TX signal will be on PB12.
config SAMD20_XPLAINED_USART4_EXT3
bool "EXT3"
---help---
Select this option if the serial console is on SERCOM4 connect via
EXT3. The RX will be on PB13 and TX signal will be on PB12.
EXT3. The RX will be on PB11 and TX signal will be on PB10.
endchoice
endif

23
configs/samd20-xplained/README.txt
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@ -403,18 +403,23 @@ Serial Consoles
SERCOM4
------
SERCOM4 is available on connectors EXT1 and EXT3
SERCOM4 is available on connectors EXT1, EXT2, and EXT3, but using
different PORT pins:
PIN EXT1 EXT3 GPIO Function
---- ---- ---- ------------------
13 PB09 PB13 SERCOM4 / USART RX
14 PB08 PB12 SERCOM4 / USART TX
19 19 GND
20 20 VCC
PIN EXT1 EXT2 EXT3 GPIO Function
---- ---- ---- ---- ------------------
13 PB09 PB13 PB11 SERCOM4 / USART RX
14 PB08 PB12 PB12 SERCOM4 / USART TX
19 GND GND GND N/A
20 VCC VCC VCC N/A
There are options available in the NuttX configuration to select which
connector SERCOM4 is on: SAMD20_XPLAINED_USART4_EXTn, where n=1, 2, or 3.
If you have a TTL to RS-232 converter then this is the most convenient
serial console to use. It is the default in all of these configurations.
An option is to use the virtual COM port.
serial console to use (because you don't lose the console device each time
you lose the USB connection). It is the default in all of these
configurations. An option is to use the virtual COM port.
Virtual COM Port
----------------

8
configs/samd20-xplained/include/board.h
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@ -372,12 +372,18 @@
# define BOARD_SERCOM4_PINMAP_PAD1 PORT_SERCOM4_PAD1_3
# define BOARD_SERCOM4_PINMAP_PAD2 0
# define BOARD_SERCOM4_PINMAP_PAD3 0
#else /* if defined(CONFIG_SAMD20_XPLAINED_USART4_EXT3) */
#elif defined(CONFIG_SAMD20_XPLAINED_USART4_EXT2)
# define BOARD_SERCOM4_MUXCONFIG (USART_CTRLA_RXPAD1 | USART_CTRLA_TXPAD0)
# define BOARD_SERCOM4_PINMAP_PAD0 PORT_SERCOM4_PAD0_1
# define BOARD_SERCOM4_PINMAP_PAD1 PORT_SERCOM4_PAD1_1
# define BOARD_SERCOM4_PINMAP_PAD2 0
# define BOARD_SERCOM4_PINMAP_PAD3 0
#else /* if defined(CONFIG_SAMD20_XPLAINED_USART4_EXT3) */
# define BOARD_SERCOM4_MUXCONFIG (USART_CTRLA_RXPAD3 | USART_CTRLA_TXPAD2)
# define BOARD_SERCOM4_PINMAP_PAD0 0
# define BOARD_SERCOM4_PINMAP_PAD1 0
# define BOARD_SERCOM4_PINMAP_PAD2 PORT_SERCOM4_PAD2_3
# define BOARD_SERCOM4_PINMAP_PAD3 PORT_SERCOM4_PAD3_3
#endif
#define BOARD_SERCOM4_FREQUENCY BOARD_GCLK0_FREQUENCY