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EFM32: Tweaks to get EFM32GG-STK3700 running NSH over LEUART0

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This commit is contained in:
Gregory Nutt 2014-11-12 12:50:09 -06:00
parent d287e7036d
commit 9160054188
5 changed files with 75 additions and 18 deletions
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4
arch/arm/src/efm32/efm32_clockconfig.c
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@ -436,7 +436,7 @@ static inline uint32_t efm32_hfclk_config(uint32_t hfclksel, uint32_t hfclkdiv)
frequency = BOARD_HFXO_FREQUENCY;
#ifdef CMU_CTRL_HFLE
#if BOARD_LFXO_FREQUENCY > CMU_MAX_FREQ_HFLE
#if BOARD_HFXO_FREQUENCY > CMU_MAX_FREQ_HFLE
/* Adjust HFXO buffer current for high crystal frequencies, enable HFLE
* for frequencies above CMU_MAX_FREQ_HFLE.
*
@ -452,7 +452,7 @@ static inline uint32_t efm32_hfclk_config(uint32_t hfclksel, uint32_t hfclkdiv)
* enabled.
*/
if ((CMU->HFCORECLKEN0 & CMU_HFCORECLKEN0_LE) != 0)
if ((getreg32(EFM32_CMU_HFCORECLKEN0) & CMU_HFCORECLKEN0_LE) != 0)
{
regval = getreg32(EFM32_CMU_HFCORECLKDIV);
regval |= CMU_HFCORECLKDIV_HFCORECLKLEDIV_DIV4;

6
configs/efm32-g8xx-stk/README.txt
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@ -179,7 +179,7 @@ SERIAL CONSOLE
USING THE J-LINK GDB SERVER
===========================
1. Star the J-Link GDB server. You should see the start-up confiration
1. Star the J-Link GDB server. You should see the start-up configuration
window. SelectL
a. Target device = EFM32G880F128
@ -192,9 +192,9 @@ USING THE J-LINK GDB SERVER
arm-none-eabi-gdb
4. Connect to the J-Link GDB serer:
4. Connect to the J-Link GDB server:
(gdb) target remote local host
(gdb) target remote localhost:2331
5. Load and run nuttx

68
configs/efm32gg-stk3700/README.txt
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@ -84,12 +84,12 @@ LEDs and Buttons
are connected to the EFM32, and are debounced by RC filters with a time
constant of 1ms. The buttons are connected to pins PB9 and PB10:
------------------------------------- --------------------
EFM32 PIN BOARD SIGNALS
------------------------------------- --------------------
B9/EBI_A03/U1_TX #2 MCU_PB9 UIF_PB0
B10/EBI_A04/U1_RX #2 MCU_PB10 UIF_PB1
------------------------------------- --------------------
------------------------------------- --------------------
EFM32 PIN BOARD SIGNALS
------------------------------------- --------------------
B9/EBI_A03/U1_TX #2 MCU_PB9 UIF_PB0
B10/EBI_A04/U1_RX #2 MCU_PB10 UIF_PB1
------------------------------------- --------------------
Buttons are connected to ground so they will read low when closed.
@ -103,6 +103,13 @@ Serial Console
and the documentation claims that 9600 baud is possible (although
I am not sure how).
---------- ---- ----------- -----------
SIGNAL PGIO EXP Header Test Point
---------- ---- ----------- -----------
LEUART0_TX PD4 Pin 12 TPJ122
LEUART0_RX PD5 Pin 14 TPJ123
---------- ---- ----------- -----------
It should also be possible to use UART0 is configured at 115200 8N1
on pins PE0 and PE1.
@ -115,6 +122,55 @@ Serial Console
setting the EFM_BC_EN (PF7) line high, and using the lines EFM_BC_TX
(PE0) and EFM_BC_RX (PE1) for communicating.
USING THE J-LINK GDB SERVER
===========================
1. Star the J-Link GDB server. You should see the start-up configuration
window. SelectL
a. Target device = EFM32GG990F1024
b. Select Target interface = SWD
2. Press OK. The GDB server should start and the last message in the Log
output should be "Waiting for GDB connection".
3. In a terminal window, start GDB:
arm-none-eabi-gdb
4. Connect to the J-Link GDB server:
(gdb) target remote localhost:2331
5. Load and run nuttx
(gdb) mon halt
(gdb) load nuttx
(gdb) mon reset go
I had to tinker with the setup a few times repeating the same steps above
before things finally began to work. Don't know why.
To debug code already burned into FLASH:
1. Start the GDB server as above.
2. In a terminal window, start GDB:
arm-none-eabi-gdb
3. Connect to the J-Link GDB serer:
(gdb) target remote local host
3. Load the nuttx symbol file, reset, and debug
(gdb) mon halt
(gdb) file nuttx
(gdb) mon reset
(gdb) s
...
Configurations
==============
Each EFM32 Giant Gecko Starter Kit configuration is maintained in a sub-

14
configs/efm32gg-stk3700/include/board.h
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@ -251,18 +251,18 @@
* U0_RX #1 PE1 MCU_PE1, UART0_TX #1, EFM_BC_TX, BC_UART_TX
*/
#define BOARD_UART0_RX_GPIO (GPIO_PORTE|GPIO_PIN1)
#define BOARD_UART0_TX_GPIO (GPIO_PORTE|GPIO_PIN0)
#define BOARD_UART0_ROUTE_LOCATION _USART_ROUTE_LOCATION_LOC1
#define BOARD_UART0_RX_GPIO (GPIO_PORTE|GPIO_PIN1)
#define BOARD_UART0_TX_GPIO (GPIO_PORTE|GPIO_PIN0)
#define BOARD_UART0_ROUTE_LOCATION _USART_ROUTE_LOCATION_LOC1
/* LEUART0:
*
* LEU0_RX #0 PD4 Available on TP121 and EXP pin 12
* LEU0_TX #0 PD5 Available on TP122 and EXP pin 14
* LEU0_TX #0 PD4 Available on TP122 and EXP pin 12
* LEU0_RX #0 PD5 Available on TP123 and EXP pin 14
*/
#define BOARD_LEUART0_RX_GPIO (GPIO_PORTD|GPIO_PIN4)
#define BOARD_LEUART0_TX_GPIO (GPIO_PORTD|GPIO_PIN5)
#define BOARD_LEUART0_RX_GPIO (GPIO_PORTD|GPIO_PIN5)
#define BOARD_LEUART0_TX_GPIO (GPIO_PORTD|GPIO_PIN4)
#define BOARD_LEUART0_ROUTE_LOCATION _LEUART_ROUTE_LOCATION_LOC0
/****************************************************************************

1
configs/efm32gg-stk3700/nsh/defconfig
View File

@ -140,6 +140,7 @@ CONFIG_EFM32_HAVE_USART2=y
CONFIG_EFM32_HAVE_UART0=y
CONFIG_EFM32_HAVE_UART1=y
CONFIG_EFM32_HAVE_LEUART1=y
CONFIG_EFM32_HAVE_OTGFS=y
# CONFIG_EFM32_USART_ISUART is not set
# CONFIG_EFM32_USART_ISSPI is not set
# CONFIG_EFM32_UART is not set