2014-10-20 20:00:37 +02:00
|
|
|
README
|
|
|
|
======
|
|
|
|
|
|
|
|
This README file discusses the port of NuttX to the Olimex EFM32G880F128-STK
|
|
|
|
development board. This board features:
|
|
|
|
|
|
|
|
• EFM32G880F128
|
|
|
|
- 32 bit Cortex-M3™
|
|
|
|
- 128KiB Program Flash, 16KiB Bytes RAM
|
|
|
|
- 85 GPIO, 8 Channel DMA
|
|
|
|
- 12 bit ADC 1Msps
|
|
|
|
- 3xUART/SPI, 2x low power UART
|
|
|
|
- I2C
|
|
|
|
- 3x 16bit TIMERS
|
|
|
|
- 3x2 CC-PWM
|
|
|
|
- SSC
|
|
|
|
- RTC
|
|
|
|
- WDT
|
|
|
|
- Up to 32MHz operation
|
|
|
|
• 32.768 kHz crystal
|
|
|
|
• 32 MHz crystal
|
|
|
|
• LCD custom display
|
|
|
|
• DEBUG connector with ARM 2x10 pin layout for programming/debugging
|
|
|
|
with ARM-JTAG-EW
|
|
|
|
• UEXT connector
|
|
|
|
• EXT extension connector
|
|
|
|
• RS232 connector and driver
|
|
|
|
• Power jack
|
|
|
|
• Lithium coin battery holder
|
|
|
|
• RESET circuit , RESET button
|
|
|
|
• Four user buttons
|
|
|
|
• Buzzer
|
|
|
|
• On-board voltage regulator 3.3V with up to 800mA current
|
|
|
|
• Power supply filtering capacitor
|
|
|
|
• Extension headers for some of the uC ports + RST and power supply
|
|
|
|
|
2014-10-20 23:08:35 +02:00
|
|
|
STATUS
|
|
|
|
======
|
|
|
|
|
|
|
|
I created this configuration with good intentions but was stopped because
|
|
|
|
I do not have a SWD tool that I can use with the board -- and I am not
|
|
|
|
likely to get one soon.
|
|
|
|
|
2014-10-20 20:00:37 +02:00
|
|
|
LEDs
|
|
|
|
====
|
|
|
|
|
|
|
|
The EFM32G880F128-STK has no user controllable LEDs.
|
|
|
|
|
2014-10-21 21:51:30 +02:00
|
|
|
Buttons
|
|
|
|
=======
|
|
|
|
|
|
|
|
The Olimex board has four buttons, BUT1-4. Each is grounded and so should
|
|
|
|
have a weak pull-up so that it will be sensed as "1" when open and "0"
|
|
|
|
when closed.
|
|
|
|
|
|
|
|
--------------------- ---------------------
|
|
|
|
PIN CONNECTIONS
|
|
|
|
--------------------- ---------------------
|
|
|
|
PE0/PCNT0_S0IN/U0_TX BUT1, EXT-18
|
|
|
|
PE1/PCNT0_S1IN/U0_RX BUT2, EXT-19
|
|
|
|
PE2/ACMP0_O BUT3, EXT-20
|
|
|
|
E3/ACMP1_O BUT4, EXT-21
|
|
|
|
--------------------- ---------------------
|
|
|
|
|
2014-10-20 20:00:37 +02:00
|
|
|
Serial Console
|
|
|
|
==============
|
|
|
|
|
|
|
|
Pin Availability
|
|
|
|
----------------
|
|
|
|
The EFM32G890F128 support the following options for serial output. NOTE
|
|
|
|
(1) that not all of these pins are available for use as a serial console,
|
|
|
|
however. And (2) not all pins made available by the board.
|
|
|
|
|
|
|
|
EFM32 PIN GPIO NOTES/CONFLICTS/AVAILABILITY
|
|
|
|
------- -- ---- ----------------------------------------------
|
|
|
|
US0_RX #0 PE11 SEG7 (LCD)
|
|
|
|
US0_RX #1 PE6 COM2 (LCD)
|
|
|
|
US0_RX #2 PC10 **AVAILABLE at EXT-12**
|
|
|
|
|
|
|
|
US0_TX #0 PE10 SEG6 (LCD)
|
|
|
|
US0_TX #1 PE7 COM3 (LCD)
|
|
|
|
US0_TX #2 PC11 **AVAILABLE at EXT-13**
|
|
|
|
------- -- ----
|
|
|
|
US1_RX #0 PC1 **AVAILABLE at EXT-5**
|
|
|
|
US1_RX #1 PD1 MISO1, Available at UEXT-7
|
|
|
|
|
|
|
|
US1_TX #0 PC0 **AVAILABLE at EXT-4**
|
|
|
|
US1_TX #1 PD0 MOSI1, Available at UEXT-8
|
|
|
|
------- -- ----
|
|
|
|
US2_RX #0 PC3 **AVAILABLE at EXT-7**
|
|
|
|
US2_RX #1 PB4 SEG21 (LCD)
|
|
|
|
|
|
|
|
US2_TX #0 PC2 **AVAILABLE at EXT-6**
|
|
|
|
US2_TX #1 PB3 SEG20 (LCD)
|
|
|
|
------- -- ----
|
|
|
|
U0_RX #0 PF7 SEG25 (LCD)
|
|
|
|
U0_RX #1 PE1 **AVAILABLE at EXT-19**
|
|
|
|
U0_RX #2 PA4 SEG18 (LCD)
|
|
|
|
U0_RX #3 PC15 DBG_SWV
|
|
|
|
|
|
|
|
U0_TX #0 PF6 SEG24 (LCD)
|
|
|
|
U0_TX #1 PE0 **AVAILABLE at EXT-18**
|
|
|
|
U0_TX #2 PA3 SEG17 (LCD)
|
|
|
|
U0_TX #3 PC14 **AVAILABLE at EXT-16**
|
|
|
|
------- -- ----
|
|
|
|
LEU0_RX #0 PD5 LEU0_RX, Available at UEXT-4
|
|
|
|
LEU0_RX #1 PB14 HFXTAL_N
|
|
|
|
LEU0_RX #2 PE15 SEG11 (LCD)
|
|
|
|
|
|
|
|
LEU0_TX #0 PD4 LEU0_TX, Available at UEXT-3
|
|
|
|
LEU0_TX #1 PB13 HFXTAL_P
|
|
|
|
LEU0_TX #2 PE14 SEG10 (LCD)
|
|
|
|
------- -- ----
|
|
|
|
LEU1_RX #0 PC7 LEU1_RX to DB-9 connector
|
|
|
|
LEU1_RX #1 PA6 SEG19 (LCD)
|
|
|
|
|
|
|
|
LEU1_TX #0 PC6 LEU1_TX to DB-9 connector
|
|
|
|
LEU1_TX #1 PA5 SEG18 (LCD)
|
|
|
|
------- -- ----
|
|
|
|
|
|
|
|
RS-232 Driver/DB-9 Connector
|
|
|
|
----------------------------
|
|
|
|
LEUART1 is available on through an RS232 driver on DB-9 connector.
|
|
|
|
Unfortunately, there is no LEUART serial driver available in NuttX as of
|
|
|
|
this writing.
|
|
|
|
|
|
|
|
Default Serial Console
|
|
|
|
----------------------
|
2014-10-21 19:38:51 +02:00
|
|
|
LEUART1 is configured as the default serial console at 2400 8N1
|
|
|
|
on pins PC6 and PC7.
|
2014-10-20 20:00:37 +02:00
|
|
|
|
|
|
|
Configurations
|
|
|
|
==============
|
|
|
|
Each EFM32G880F128-STK configuration is maintained in a sub-director
|
|
|
|
and can be selected as follow:
|
|
|
|
|
2019-08-06 00:53:39 +02:00
|
|
|
tools/configure.sh olimex-efm32g880f128-stk:<subdir>
|
2014-10-20 20:00:37 +02:00
|
|
|
|
|
|
|
Where <subdir> is one of the following:
|
|
|
|
|
|
|
|
nsh:
|
|
|
|
---
|
|
|
|
Configures the NuttShell (nsh) located at apps/examples/nsh. The
|
2014-10-21 19:38:51 +02:00
|
|
|
Configuration enables the serial interfaces on LEUART1. Support for
|
2014-10-20 20:00:37 +02:00
|
|
|
builtin applications is enabled, but in the base configuration no
|
|
|
|
builtin applications are selected (see NOTES below).
|
|
|
|
|
|
|
|
NOTES:
|
|
|
|
|
|
|
|
1. This configuration uses the mconf-based configuration tool. To
|
|
|
|
change this configuration using that tool, you should:
|
|
|
|
|
|
|
|
a. Build and install the kconfig-mconf tool. See nuttx/README.txt
|
2015-06-28 16:08:57 +02:00
|
|
|
see additional README.txt files in the NuttX tools repository.
|
2014-10-20 20:00:37 +02:00
|
|
|
|
|
|
|
b. Execute 'make menuconfig' in nuttx/ in order to start the
|
|
|
|
reconfiguration process.
|
|
|
|
|
2020-05-13 16:18:31 +02:00
|
|
|
2. By default, this configuration uses the ARM EABI toolchain
|
2014-10-20 20:00:37 +02:00
|
|
|
for Windows and builds under Cygwin (or probably MSYS). That
|
|
|
|
can easily be reconfigured, of course.
|
|
|
|
|
|
|
|
CONFIG_HOST_WINDOWS=y : Builds under Windows
|
|
|
|
CONFIG_WINDOWS_CYGWIN=y : Using Cygwin
|
2022-04-18 18:02:33 +02:00
|
|
|
CONFIG_ARMV7M_TOOLCHAIN_GNU_EABI=y : GNU EABI toolchain for Windows
|
2020-05-13 16:18:31 +02:00
|
|
|
|