diff options
Diffstat (limited to 'nuttx/configs/sam4l-xplained/include/board.h')
| -rw-r--r-- | nuttx/configs/sam4l-xplained/include/board.h | 66 |
1 files changed, 46 insertions, 20 deletions
diff --git a/nuttx/configs/sam4l-xplained/include/board.h b/nuttx/configs/sam4l-xplained/include/board.h index fe0e2018d..691588091 100644 --- a/nuttx/configs/sam4l-xplained/include/board.h +++ b/nuttx/configs/sam4l-xplained/include/board.h @@ -84,15 +84,29 @@ #define BOARD_RCFAST12M_FREQUENCY 12000000 /* Nominal frequency of RCFAST12M (Hz) */ #define BOARD_RC1M_FREQUENCY 1000000 /* Nominal frequency of RC1M (Hz) */ +/* The SAM4L Xplained Pro has two on-board crystals: + * XC100 12MHz OSC0 + * XC101 32.768KHz OSC32 + */ + +/* OSC0 Configuration */ + +#define BOARD_OSC0_FREQUENCY 12000000 /* 12MHz XTAL */ + /* OSC32 Configuration */ -#define BOARD_OSC32_FREQUENCY 32768 +#define BOARD_OSC32_FREQUENCY 32768 /* 32.768KHz XTAL */ #define BOARD_OSC32_STARTUP_US 6100 #define BOARD_OSC32_SELCURR BSCIF_OSCCTRL32_SELCURR_300 +#define BOARD_OSC32_ISXTAL 1 /* OSC32 is a crystal */ /* Digital Frequency Locked Loop configuration * Fdfll = (Fclk * DFLLmul) / DFLLdiv - * = 32768 * (48000000/32760) / 1 = 48MHz + * = 32768 * (48000000/32768) / 1 = 48MHz + * + * The actual frequency is 47.97MHz due to truncation of the multiplier. + * The 48MHz target value is treated as "not-to-exceed" value). Use OSC0 + * if you need more accuracy (12MHz with a multiplier of 4). * * DFLL0 source options (select one): * BOARD_DFLL0_SOURCE_RCSYS - System RC oscillator @@ -105,9 +119,10 @@ */ #define BOARD_DFLL0_SOURCE_OSC32K 1 -#define BOARD_DFLL0_FREQUENCY 48000000 -#define BOARD_DFLL0_MUL (BOARD_DFLL0_FREQUENCY / BOARD_OSC32_FREQUENCY) +#define BOARD_DFLL0_TARGET 48000000 +#define BOARD_DFLL0_MUL (BOARD_DFLL0_TARGET / BOARD_OSC32_FREQUENCY) #define BOARD_DFLL0_DIV 1 +#define BOARD_DFLL0_FREQUENCY (BOARD_OSC32_FREQUENCY * BOARD_DFLL0_MUL / BOARD_DFLL0_DIV) /* Phase Locked Loop configuration * Fdfll = (Fclk * PLLmul) / PLLdiv @@ -134,22 +149,22 @@ * NOTE: Nothing must be defined if the PLL0 is not used */ -/* System clock dividers: Fbus = Fsys >> BUSshift */ +/* System clock dividers: Fbus = Fmck >> BUSshift */ -#define BOARD_CPU_SHIFT 0 /* Fcpu = Fsys = 48MHz */ -#define BOARD_PBA_SHIFT 0 /* Fpba = Fsys = 48MHz */ -#define BOARD_PBB_SHIFT 0 /* Fpbb = Fsys = 48MHz */ -#define BOARD_PBC_SHIFT 0 /* Fpbc = Fsys = 48MHz */ -#define BOARD_PBD_SHIFT 0 /* Fpbd = Fsys = 48MHz */ +#define BOARD_CPU_SHIFT 0 /* Fcpu = Fmck = 48MHz */ +#define BOARD_PBA_SHIFT 0 /* Fpba = Fmck = 48MHz */ +#define BOARD_PBB_SHIFT 0 /* Fpbb = Fmck = 48MHz */ +#define BOARD_PBC_SHIFT 0 /* Fpbc = Fmck = 48MHz */ +#define BOARD_PBD_SHIFT 0 /* Fpbd = Fmck = 48MHz */ /* Resulting frequencies */ -#define BOARD_MAIN_FREQUENCY (12000000) -#define BOARD_CPU_FREQUENCY (BOARD_MAIN_FREQUENCY >> BOARD_CPU_SHIFT) -#define BOARD_PBA_FREQUENCY (BOARD_MAIN_FREQUENCY >> BOARD_PBA_SHIFT) -#define BOARD_PBB_FREQUENCY (BOARD_MAIN_FREQUENCY >> BOARD_PBB_SHIFT) -#define BOARD_PBC_FREQUENCY (BOARD_MAIN_FREQUENCY >> BOARD_PBC_SHIFT) -#define BOARD_PBD_FREQUENCY (BOARD_MAIN_FREQUENCY >> BOARD_PBD_SHIFT) +#define BOARD_MCK_FREQUENCY (BOARD_DFLL0_FREQUENCY) +#define BOARD_CPU_FREQUENCY (BOARD_MCK_FREQUENCY >> BOARD_CPU_SHIFT) +#define BOARD_PBA_FREQUENCY (BOARD_MCK_FREQUENCY >> BOARD_PBA_SHIFT) +#define BOARD_PBB_FREQUENCY (BOARD_MCK_FREQUENCY >> BOARD_PBB_SHIFT) +#define BOARD_PBC_FREQUENCY (BOARD_MCK_FREQUENCY >> BOARD_PBC_SHIFT) +#define BOARD_PBD_FREQUENCY (BOARD_MCK_FREQUENCY >> BOARD_PBD_SHIFT) /* USBC. * @@ -238,10 +253,21 @@ #define BUTTON_SW0_BIT (1 << BUTTON_SW0) /* Alternate Function Disambiguation ************************************************/ -/* The SAM4L Xplained Pro contains an Embedded Debugger (EDBG) that can be - * used to program and debug the ATSAM4LC4C using Serial Wire Debug (SWD). - * The Embedded debugger also include a Virtual Com port interface over - * USART1. Virtual COM port connections: +/* USART0 is also available on connectors EXT1 and EXT4: + * + * EXT1 TXT4 GPIO Function + * ---- ---- ------ ----------- + * 13 13 PB00 USART0_RXD + * 14 14 PB01 USART0_TXD + */ + +#define GPIO_USART0_RXD GPIO_USART0_RXD_4 +#define GPIO_USART0_TXD GPIO_USART0_TXD_4 + +/* The SAM4L Xplained Pro contains an Embedded Debugger (EDBG) that can be used to + * program and debug the ATSAM4LC4C using Serial Wire Debug (SWD). The Embedded + * debugger also include a Virtual Com port interface over USART1. Virtual COM + * port connections: * * PC26 USART1 RXD * PC27 USART1 TXD |