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Add logic to manage BC_EN signal

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This commit is contained in:
Gregory Nutt 2014-10-22 14:27:05 -06:00
parent fa0a5d506c
commit 7906fe0d4f
5 changed files with 54 additions and 11 deletions
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12
configs/efm32-g8xx-stk/Kconfig
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@ -5,6 +5,16 @@
if ARCH_BOARD_EFM32G8XXSTK
#comment "EFM32 G8XX STK Hardware Configuration"
comment "EFM32 G8XX STK Hardware Configuration"
config EFM32G8STK_BCEN
bool "Enable BC_EN"
default n
---help---
The control MCU acts as a board controller (BC). There is a UART
connection between the EFM and the BC. The connection is made by
setting the EFM_BC_EN (PD13) line high. The EFM can then use the
BSP to send commands to the BC. When EFM_BC_EN is low, EFM_BC_TX
and EFM_BC_RX can be used by other applications.
endif # ARCH_BOARD_EFM32G8XXSTK

18
configs/efm32-g8xx-stk/README.txt
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@ -5,8 +5,8 @@ README
Gecko Starter Kit (EFM32-G8XX-STK). The Gecko Starter Kit features:
• EFM32G890F128 MCU with 128 kB flash and 16 kB RAM
• 32.768 kHz crystal
• 32 MHz crystal
• 32.768 kHz crystal (LXFO)
• 32 MHz crystal (HXFO)
• Advanced Energy Monitoring
• Touch slider
• 4x40 LCD
@ -14,7 +14,7 @@ README
• 2 pushbutton switches
• Reset button and a switch to disconnect the battery.
• On-board SEGGER J-Link USB emulator
• ARM 20 pin JTAG/SWD standard Debug in/out connector
• ARM 20 pin JTAG/SWD standard Debug in/out connector
STATUS
======
@ -129,13 +129,13 @@ Serial Console
------------------------------------------
The control MCU acts as a board controller (BC). There is a UART
connection between the EFM and the BC. The connection is made by
setting the BC_EN line high. The EFM can then use the BSP to send
commands to the BC. When BC_EN is low, BC_TX and BC_RX can be used
by other applications.
setting the EFM_BC_EN (PD13) line high. The EFM can then use the BSP to
send commands to the BC. When EFM_BC_EN is low, EFM_BC_TX and EFM_BC_RX
can be used by other applications.
Configurations
==============
Each EFM32 Gecko Starter Kit configuration is maintained in a sub-director
Each EFM32 Gecko Starter Kit configuration is maintained in a sub-directory
and can be selected as follow:
cd tools
@ -154,8 +154,8 @@ Configurations
---
Configures the NuttShell (nsh) located at apps/examples/nsh. The
Configuration enables the serial interfaces on UART0. Support for
builtin applications is enabled, but in the base configuration no
builtin applications are selected (see NOTES below).
built-in applications is enabled, but in the base configuration no
built-in applications are selected (see NOTES below).
NOTES:

6
configs/efm32-g8xx-stk/nsh/defconfig
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@ -119,6 +119,7 @@ CONFIG_ARMV7M_TOOLCHAIN_CODESOURCERYW=y
# CONFIG_ARMV7M_TOOLCHAIN_GNU_EABIL is not set
# CONFIG_ARMV7M_TOOLCHAIN_GNU_EABIW is not set
# CONFIG_ARMV7M_TOOLCHAIN_RAISONANCE is not set
# CONFIG_ARMV7M_ITMSYSLOG is not set
#
# EFM32 Configuration Options
@ -224,6 +225,11 @@ CONFIG_NSH_MMCSDMINOR=0
# Board-Specific Options
#
#
# EFM32 G8XX STK Hardware Configuration
#
# CONFIG_EFM32G8STK_BCEN is not set
#
# RTOS Features
#

16
configs/efm32-g8xx-stk/src/efm32-g8xx-stk.h
View File

@ -43,6 +43,22 @@
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* UART0
*
* The control MCU acts as a board controller (BC). There is a UART
* connection between the EFM and the BC. The connection is made by
* setting the EFM_BC_EN (PD13) line high. The EFM can then use the BSP to
* send commands to the BC. When EFM_BC_EN is low, EFM_BC_TX and EFM_BC_RX
* can be used by other applications.
*/
#ifdef CONFIG_EFM32G8STK_BCEN
# define GPIO_BC_EN (GPIO_OUTPUT_PUSHPULL|GPIO_OUTPUT_SET|\
GPIO_PORTD|GPIO_PIN13)
#else
# define GPIO_BC_EN (GPIO_OUTPUT_PUSHPULL|GPIO_OUTPUT_CLEAR|\
GPIO_PORTD|GPIO_PIN13)
#endif
/* LEDs
*

13
configs/efm32-g8xx-stk/src/efm32_boot.c
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@ -39,8 +39,8 @@
#include <nuttx/config.h>
#include "efm32_gpio.h"
#include "efm32_start.h"
#include "efm32-g8xx-stk.h"
/****************************************************************************
@ -59,6 +59,17 @@
void efm32_boardinitialize(void)
{
#ifdef CONFIG_EFM32_UART0
/* The control MCU acts as a board controller (BC). There is a UART
* connection between the EFM and the BC. The connection is made by
* setting the EFM_BC_EN (PD13) line high. The EFM can then use the BSP to
* send commands to the BC. When EFM_BC_EN is low, EFM_BC_TX and EFM_BC_RX
* can be used by other applications.
*/
efm32_configgpio(GPIO_BC_EN);
#endif
#ifdef CONFIG_ARCH_LEDS
/* Configure on-board LEDs if LED support has been selected. */