/************************************************************************************
* arch/arm/src/lm3s/lm3s_internal.h
*
* Copyright (C) 2009 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
************************************************************************************/
#ifndef __ARCH_ARM_SRC_LM3S_LM3S_INTERNAL_H
#define __ARCH_ARM_SRC_LM3S_LM3S_INTERNAL_H
/************************************************************************************
* Included Files
************************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
/************************************************************************************
* Definitions
************************************************************************************/
/* The LM3S6918 only supports 8 priority levels. The hardware priority mechanism
* will only look at the upper N bits of the 8-bit priority level (where N is 3 for
* the Stellaris family), so any prioritization must be performed in those bits.
* The default priority level is set to the middle value
*/
#define NVIC_SYSH_PRIORITY_MIN 0x00
#define NVIC_SYSH_PRIORITY_DEFAULT 0x80
#define NVIC_SYSH_PRIORITY_MAX 0xe0
/* Bit-encoded input to lm3s_configgpio() *******************************************/
#define GPIO_FUNC_SHIFT 29 /* Bit 31-29: GPIO function */
#define GPIO_FUNC_MASK (7 << GPIO_FUNC_SHIFT) /* (See table 9-1 in data sheet) */
#define GPIO_FUNC_INPUT (0 << GPIO_FUNC_SHIFT) /* Digital GPIO input */
#define GPIO_FUNC_OUTPUT (1 << GPIO_FUNC_SHIFT) /* Digital GPIO output */
#define GPIO_FUNC_ODINPUT (2 << GPIO_FUNC_SHIFT) /* Open-drain GPIO input */
#define GPIO_FUNC_ODOUTPUT (3 << GPIO_FUNC_SHIFT) /* Open-drain GPIO output */
#define GPIO_FUNC_PFODIO (4 << GPIO_FUNC_SHIFT) /* Open-drain input/output (I2C) */
#define GPIO_FUNC_PFINPUT (5 << GPIO_FUNC_SHIFT) /* Digital input (Timer, CCP) */
#define GPIO_FUNC_PFOUTPUT (5 << GPIO_FUNC_SHIFT) /* Digital output (Timer, PWM, Comparator) */
#define GPIO_FUNC_PFIO (5 << GPIO_FUNC_SHIFT) /* Digital input/output (SSI, UART) */
#define GPIO_FUNC_ANINPUT (6 << GPIO_FUNC_SHIFT) /* Analog input (Comparator) */
#define GPIO_FUNC_INTERRUPT (7 << GPIO_FUNC_SHIFT) /* Interrupt function */
#define GPIO_INT_SHIFT 26 /* Bits 28-26: Interrupt type */
#define GPIO_INT_MASK (7 << GPIO_INT_SHIFT)
#define GPIO_INT_FALLINGEDGE (0 << GPIO_INT_SHIFT) /* Interrupt on falling edge */
#define GPIO_INT_RISINGEDGE (1 << GPIO_INT_SHIFT) /* Interrupt on rising edge */
#define GPIO_INT_BOTHEDGES (2 << GPIO_INT_SHIFT) /* Interrupt on both edges */
#define GPIO_INT_LOWLEVEL (3 << GPIO_INT_SHIFT) /* Interrupt on low level */
#define GPIO_INT_HIGHLEVEL (4 << GPIO_INT_SHIFT) /* Interrupt on high level */
#define GPIO_STRENGTH_SHIFT 24 /* Bits 25-24: Pad drive strength */
#define GPIO_STRENGTH_MASK (3 << GPIO_STRENGTH_SHIFT)
#define GPIO_STRENGTH_2MA (0 << GPIO_STRENGTH_SHIFT) /* 2mA pad drive strength */
#define GPIO_STRENGTH_4MA (1 << GPIO_STRENGTH_SHIFT) /* 4mA pad drive strength */
#define GPIO_STRENGTH_8MA (2 << GPIO_STRENGTH_SHIFT) /* 8mA pad drive strength */
#define GPIO_STRENGTH_8MASC (3 << GPIO_STRENGTH_SHIFT) /* 8mA Pad drive with slew rate control */
#define GPIO_PADTYPE_SHIFT 21 /* Bits 21-23: Pad type */
#define GPIO_PADTYPE_MASK (7 << GPIO_PADTYPE_SHIFT)
#define GPIO_PADTYPE_STD (0 << GPIO_PADTYPE_SHIFT) /* Push-pull */
#define GPIO_PADTYPE_STDWPU (1 << GPIO_PADTYPE_SHIFT) /* Push-pull with weak pull-up */
#define GPIO_PADTYPE_STDWPD (2 << GPIO_PADTYPE_SHIFT) /* Push-pull with weak pull-down */
#define GPIO_PADTYPE_OD (3 << GPIO_PADTYPE_SHIFT) /* Open-drain */
#define GPIO_PADTYPE_ODWPU (4 << GPIO_PADTYPE_SHIFT) /* Open-drain with weak pull-up */
#define GPIO_PADTYPE_ODWPD (5 << GPIO_PADTYPE_SHIFT) /* Open-drain with weak pull-down */
#define GPIO_PADTYPE_ANALOG (6 << GPIO_PADTYPE_SHIFT) /* Analog comparator */
#define GPIO_VALUE_SHIFT 6 /* Bit 6: If output, inital value of output */
#define GPIO_VALUE_MASK (1 << GPIO_VALUE_SHIFT)
#define GPIO_VALUE_ZERO (0 << GPIO_VALUE_SHIFT) /* Initial value is zero */
#define GPIO_VALUE_ONE (1 << GPIO_VALUE_SHIFT) /* Initial value is one */
#define GPIO_PORT_SHIFT 3 /* Bit 3-5: Port number */
#define GPIO_PORT_MASK (7 << GPIO_PORT_SHIFT)
#define GPIO_PORTA (0 << GPIO_PORT_SHIFT) /* GPIOA */
#define GPIO_PORTB (1 << GPIO_PORT_SHIFT) /* GPIOB */
#define GPIO_PORTC (2 << GPIO_PORT_SHIFT) /* GPIOC */
#define GPIO_PORTD (3 << GPIO_PORT_SHIFT) /* GPIOD */
#define GPIO_PORTE (4 << GPIO_PORT_SHIFT) /* GPIOE */
#define GPIO_PORTF (5 << GPIO_PORT_SHIFT) /* GPIOF */
#define GPIO_PORTG (6 << GPIO_PORT_SHIFT) /* GPIOG */
#define GPIO_PORTH (7 << GPIO_PORT_SHIFT) /* GPIOH */
#define GPIO_NUMBER_SHIFT 0 /* Bits 0-2: GPIO number: 0-7 */
#define GPIO_NUMBER_MASK (7 << GPIO_NUMBER_SHIFT)
/* The following lists the input value to lm3s_configgpio to setup the alternate,
* hardware function for each pin.
*/
#define GPIO_UART0_RX (GPIO_FUNC_PFINPUT | GPIO_PORTA | 0) /* PA0: UART 0 receive (U0Rx) */
#define GPIO_UART0_TX (GPIO_FUNC_PFOUTPUT | GPIO_PORTA | 1) /* PA1: UART 0 transmit (U0Tx) */
#define GPIO_SSI0_CLK (GPIO_FUNC_PFIO | GPIO_PORTA | 2) /* PA2: SSI0 clock (SSI0Clk) */
#define GPIO_SSI0_FSS (GPIO_FUNC_PFIO | GPIO_PORTA | 3) /* PA3: SSI0 frame (SSI0Fss) */
#define GPIO_SSI0_RX (GPIO_FUNC_PFINPUT | GPIO_PORTA | 4) /* PA4: SSI0 receive (SSI0Rx) */
#define GPIO_SSI0_TX (GPIO_FUNC_PFOUTPUT | GPIO_PORTA | 5) /* PA5: SSI0 transmit (SSI0Tx) */
#define GPIO_PWM1_CCP (GPIO_FUNC_PFIO | GPIO_PORTA | 6) /* PA6: Capture/Compare/PWM1 (CCP1) */
#define GPIO_I2C1_SDA (GPIO_FUNC_PFODIO | GPIO_PORTA | 7) /* PA7: I2C1 data (I2C1SDA) */
#define GPIO_PWM0_CCP (GPIO_FUNC_PFIO | GPIO_PORTB | 0) /* PB0: Capture/Compare/PWM0 (CCP0) */
#define GPIO_PWM2_CCP (GPIO_FUNC_PFIO | GPIO_PORTB | 1) /* PB1: Capture/Compare/PWM2 (CCP2) */
#define GPIO_I2C0_SCL (GPIO_FUNC_PFOUTPUT | GPIO_PORTB | 2) /* PB2: I2C0 clock (I2C0SCL) */
#define GPIO_I2C0_SDA (GPIO_FUNC_PFODIO | GPIO_PORTB | 3) /* PB3: I2C0 data (I2C0SDA) */
#define GPIO_CMP0_NIN (GPIO_FUNC_PFINPUT | GPIO_PORTB | 4) /* PB4: Analog comparator 0 negative input (C0-) */
#define GPIO_CMP1_NIN (GPIO_FUNC_PFINPUT | GPIO_PORTB | 5) /* PB5: Analog comparator 1 negative input (C1-) */
#define GPIO_CMP0_PIN (GPIO_FUNC_PFINPUT | GPIO_PORTB | 6) /* PB6: Analog comparator 0 positive input (C0+) */
#define GPIO_JTAG_TRST (GPIO_FUNC_PFINPUT | GPIO_PORTB | 7) /* PB7: JTAG ~TRST */
#define GPIO_JTAG_TCK (GPIO_FUNC_PFINPUT | GPIO_PORTC | 0) /* PC0: JTAG/SWD CLK */
#define GPIO_JTAG_SWCLK (GPIO_FUNC_PFINPUT | GPIO_PORTC | 0) /* PC0: JTAG/SWD CLK */
#define GPIO_JTAG_TMS (GPIO_FUNC_PFIO | GPIO_PORTC | 1) /* PC1: JTAG TMS */
#define GPIO_JTAG_SWDIO (GPIO_FUNC_PFIO | GPIO_PORTC | 1) /* PC1: JTAG SWDIO */
#define GPIO_JTAG_TDI (GPIO_FUNC_PFINPUT | GPIO_PORTC | 2) /* PC2: JTAG TDI */
#define GPIO_JTAG_TDO (GPIO_FUNC_PFOUTPUT | GPIO_PORTC | 3) /* PC3: JTAG TDO */
#define GPIO_JTAG_SWO (GPIO_FUNC_PFOUTPUT | GPIO_PORTC | 3) /* PC3: JTAG SWO */
#define GPIO_PWM5_CCP (GPIO_FUNC_PFIO | GPIO_PORTC | 4) /* PC4: Capture/Compare/PWM5 (CCP5) */
#define GPIO_CMP1_PIN (GPIO_FUNC_PFINPUT | GPIO_PORTC | 5) /* PC5: Analog comparator 1 positive input (C1+) */
#define GPIO_CMP0_OUT (GPIO_FUNC_PFOUTPUT | GPIO_PORTC | 5) /* PC5: Analog comparator 0 output (C0o) */
#define GPIO_PWM3_CCP (GPIO_FUNC_PFIO | GPIO_PORTC | 6) /* PC6: Capture/Compare/PWM3 (CCP3) */
#define GPIO_PWM4_CCP (GPIO_FUNC_PFIO | GPIO_PORTC | 7) /* PC7: Capture/Compare/PWM4 (CCP4) */
#define GPIO_UART1_RX (GPIO_FUNC_PFINPUT | GPIO_PORTD | 2) /* PD2: UART 1 receive (U1Rx) */
#define GPIO_UART1_TX (GPIO_FUNC_PFOUTPUT | GPIO_PORTD | 3) /* PD3: UART 1 transmit (U1Tx) */
#define GPIO_SSI1_CLK (GPIO_FUNC_PFIO1 | GPIO_PORTE | 0) /* PE0: SSI1 clock (SSI1Clk) */
#define GPIO_SSI1_FSS (GPIO_FUNC_PFIO | GPIO_PORTE | 1) /* PE1: SSI1 frame (SSI1Fss) */
#define GPIO_SSI1_RX (GPIO_FUNC_PFINPUT | GPIO_PORTE | 2) /* PE2: SSI1 receive (SSI1Rx) */
#define GPIO_SSI1_TX (GPIO_FUNC_PFOUTPUT | GPIO_PORTE | 3) /* PE3: SSI1 transmit (SSI1Tx) */
#define GPIO_ETHPHY_LED1 (GPIO_FUNC_PFOUTPUT | GPIO_PORTF | 2) /* PF2: LED1 */
#define GPIO_ETHPHY_LED0 (GPIO_FUNC_PFOUTPUT | GPIO_PORTF | 3) /* PF3: LED0 */
#define GPIO_I2C1_SCL (GPIO_FUNC_PFOUTPUT | GPIO_PORTG | 0) /* PG0: I2C1 clock (I2C1SCL) */
/************************************************************************************
* Public Types
************************************************************************************/
/************************************************************************************
* Inline Functions
************************************************************************************/
#ifndef __ASSEMBLY__
static inline uint32 lm3s_gpiobaseaddress(unsigned int port)
{
#ifdef CONFIG_ARCH_CHIP_LM3S6918
unsigned int portno = (port >> GPIO_PORT_SHIFT) & 7;
if (portno < 4)
{
return LM3S_GPIOA_BASE + 0x1000 * portno;
}
else
{
return LM3S_GPIOE_BASE + 0x1000 * portno;
}
#else
# error "GPIO register base addresses not known for this LM3S chip"
return 0;
#endif
}
/************************************************************************************
* Public Data
************************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C" {
#else
#define EXTERN extern
#endif
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
/****************************************************************************
* Name: up_lowsetup
*
* Description:
* Called at the very beginning of _start. Performs low level initialization.
*
****************************************************************************/
EXTERN void up_lowsetup(void);
/****************************************************************************
* Name: lm3s_clockconfig
*
* Description:
* Called to check to new clock based on desired rcc and rcc2 settings.
* This is use to set up the initial clocking but can be used later to
* support slow clocked, low power consumption modes.
*
****************************************************************************/
EXTERN void lm3s_clockconfig(uint32 newrcc, uint32 newrcc2);
/****************************************************************************
* Name: up_clockconfig
*
* Description:
* Called early in the bootsequence (before .data and .bss are available)
* in order to configure initial clocking.
*
****************************************************************************/
EXTERN void up_clockconfig(void);
/* Configure a GPIO pin */
/****************************************************************************
* Name: lm3s_configgpio
*
* Description:
* Configure a GPIO pin based on bit-encoded description of the pin.
*
****************************************************************************/
EXTERN int lm3s_configgpio(uint32 bitset);
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __ASSEMBLY__ */
#endif /* __ARCH_ARM_SRC_LM3S_LM3S_INTERNAL_H */
